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WO1997019371A2 - Adaptation de chrominance - Google Patents

Adaptation de chrominance Download PDF

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Publication number
WO1997019371A2
WO1997019371A2 PCT/IL1996/000163 IL9600163W WO9719371A2 WO 1997019371 A2 WO1997019371 A2 WO 1997019371A2 IL 9600163 W IL9600163 W IL 9600163W WO 9719371 A2 WO9719371 A2 WO 9719371A2
Authority
WO
WIPO (PCT)
Prior art keywords
transparency
chromaticity
accordance
illumination
light
Prior art date
Application number
PCT/IL1996/000163
Other languages
English (en)
Other versions
WO1997019371B1 (fr
WO1997019371A3 (fr
Inventor
Dan Inbar
Original Assignee
Smartlight Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/EP1995/004693 external-priority patent/WO1996017269A2/fr
Priority claimed from IL11624495A external-priority patent/IL116244A0/xx
Priority claimed from IL11625295A external-priority patent/IL116252A0/xx
Application filed by Smartlight Ltd. filed Critical Smartlight Ltd.
Priority to JP09519569A priority Critical patent/JP2001500274A/ja
Priority to EP96938447A priority patent/EP0990189A4/fr
Priority to AU75859/96A priority patent/AU7585996A/en
Priority to US08/760,652 priority patent/US6311419B1/en
Publication of WO1997019371A2 publication Critical patent/WO1997019371A2/fr
Publication of WO1997019371A3 publication Critical patent/WO1997019371A3/fr
Publication of WO1997019371B1 publication Critical patent/WO1997019371B1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies

Definitions

  • This application relates to viewboxes for viewing x-ray transparencies and in particular to modifying the chromaticity of back-illumination for these viewboxes.
  • One exemplary method of correction incorporates a camera for viewing the film and determining the color of the light emanating from film and a controller for adjusting the intensity of different lighting sources for adjusting the chromaticity of the back illumination.
  • One way of correcting the chromaticity described in these applications is using specially tinted lamps to adjust the chromaticity of the back-illumination SmartLight LTD of Israel (the assignee of the present application) showed, at a 1995
  • WO96/ 17269 describes a two-intensity viewbox wherein low intensity lighting is provided using a white light source and high intensity lighting is provided by a high efficiency light source which may have a higher color temperature than the low-intensity light source
  • the suggested high intensity light source has a color temperature of 6000 degrees before passing through the LCA and a color temperature of 4000 degrees Kelvin after passing through the LCA A color temperature of 4000 degrees Kelvin is suitable for day vision and not for night vision, as will be described with greater detail below
  • high density areas may be illuminated using a local spot light
  • a spot light is usually white or yellow.
  • warm light is light which has a substantial amount of yellow and red, while cool light has a substantial amount of blue.
  • the color temperature of cool light is higher than the color temperature of warm light.
  • the viewbox adjusts the back-illumination to compensate for the chromatic absorbency of the transparency
  • the transparency type is inputted to the viewbox by the user and the viewbox calculates the chromaticity correction based on a chromaticity correction table which is stored in a memory
  • a chromaticity correction table which is stored in a memory
  • the table may include signals sets for driving the back-illumination under various viewing situations Alternatively, illumination spectra for the various viewing situations may be stored
  • the viewbox may read the film type from the transparency itself, for example using a bar code reader
  • the chromaticity of the transparency itself may be determined using a color sensor
  • the user may input directly the desired chromaticity correction, such as using a (manual) table of values for different film types
  • the viewbox determines the density of at least a portion of the transparency in order to calculate the desired chromaticity compensation
  • a relatively precise back-illumination chromaticity may be achieved by using a large number of lamps for the back-illumination Each of the lamps has a narrow spectral range, such as red, green or blue
  • a number of lamps of each spectral range are lighted, so that a relatively exact chromaticity is obtained.
  • the relative intensity of each lamp is also controlled to fine tune the chromaticity
  • a transparency in accordance with another preferred embodiment of the invention, includes a viewbox readable indication of the film type and/or chromaticity
  • the indication is a bar-code type indication for ease of reading
  • a bluer back-illumination is used for transparency portions which are denser and a redder back-illumination is used for transparency portions which are clearer
  • This blue-shifting compensates to some extent for the reduction in visual acuity caused by the low-levels of light which actually pass through the denser portions
  • different portions of a single transparency are back-illuminated to transmit light with different chromaticities
  • these different portions are illuminated simultaneously with different color light
  • most of the back-illumination is provided by lamps with a bluer output spectrum, with the balance being provided by warmer colored lamps
  • warmer colored lamps For clear portions of the film, only a few, warm colored lamps are lighted, while for dense portions o the film, all the lamps are lighted, so that the back-illumination is cooler (blue-shifted)
  • very high film optical densities are encountered is in viewing the skin layer of a breast in a mammography image
  • the skin layer is characterized by very high optical density values, even compared to the rest of the breast, normally with a two order of magnitude difference in density between the skin layer and the rest of the breast
  • the image of a breast in a mammogram is back-illuminated using a masking pattern which back-illuminates only the skin layer of the breast
  • the masking pattern has a varying density, so that portions of the skin layer with a higher density are back-illuminated with more intensity than portions with a lower density
  • Another preferred embodiment of the invention relates to controlling the pupil size of an observer by varying the chromaticity of ambient light
  • a blue-tinted ambient light is used so that the operator's pupil decreases in diameter and a better visual acuity is provided, such as required when viewing high detail areas of the transparency
  • a pink-tinted ambient light is used
  • the exact tint used is personalized for the individual operator It should be appreciated that when the pupil size decreases the visual acuity increases because the effect of aberrations in the eye is reduced The decrease in aberrations more than compensates for the reduction in light reaching the retina of the eye Below some pupil size, the increase in acuity is reversed, since at very small pupil sizes not enough light reaches the retina of the eye Thus, an optimal pupil size can be achieved for a particular operator and/or lighting condition Alternatively or additionally, the viewbox automatically chooses the ambient color tint based on the gaze direction of the operator and in particular on the objects of interest in the field of view of
  • a transparency viewing device including a faceplate adapted for mounting at least one transparency having a particular average density at at least a portion thereof, a source of back illumination for the transparency, and a controller which varies the chromaticity of the back illumination based on the particular average density
  • the controller varies the chromaticity based on the chromaticity of the transparency
  • a transparency viewing device including a faceplate adapted for mounting at least one transparency having a particular chromaticity thereon, a source of back-illumination for the transparency, and a controller which varies the chromaticity of the back-illumination based on the particular chromaticity of the transparency, where the viewbox does not directly measure the chromaticity of light transmitted through the transparency
  • the controller receives an indication of the particular chromaticity from an operator
  • the controller reads an indication of the chromaticity of the transparency from the film
  • the indication includes a film type
  • the controller varies the chromaticity based on a particular density of at least a portion ofthe transparency
  • the controller locally varies the back- illumination chromaticity responsive to local characteristics of the transparency
  • different back-illumination chromaticity is provided at at least two different locations
  • the controller provides higher color temperature back-illumination at locations of film having higher densities to compensate for a limited ability of the back-illumination to provide sufficient illumination for the higher density locations.
  • the device includes a masking pattern generator which affects the chromaticity of the back-illumination
  • the masking pattern generator includes an LC array
  • the controller varies the back-illumination based on the effect of the masking pattern generator on the back-illumination chromaticity
  • the controller includes a chromaticity/type memory, which memory stores information regarding chromaticity corrections for a plurality of transparency types
  • the controller includes a chromaticity/mask memory ' , which memory stores information regarding chromaticity corrections for a plurality of mask patterns
  • the controller includes a chromaticity/back-illumination memory, which memory stores information regarding chromaticity corrections for a plurality of back-illumination conditions
  • the controller includes a chromaticity/density memory, which memory stores information regarding chromaticity corrections for a plurality of transparency densities
  • the back-illumination source includes a plurality of narrow spectrum lamps, where the controller lights selected ones of said plurality of lamps to generate back-illumination of a desired chromaticity
  • the back-illumination source includes at least one high color temperature lamp which provides most of the intensity of said back-illumination and at least one low color temperature lamp which provides a small portion of the intensity of said back-illumination
  • a transparency including a film base, and a computer readable marking on the film indicative ofthe film chromaticity
  • the indication includes a film type
  • the indication includes a bar-code indication
  • a transparency viewing device including a faceplate adapted for mounting at least one transparency thereon; a source of back illumination for the transparency, including a plurality of narrow spectrum lamps of a plurality of spectral bands, and a controller which lights selected ones of the plurality of lamps to generate back- illumination ofa desired chromaticity
  • the plurality of spectral bands includes at least three spectral bands
  • the plurality of lamps comprises at least 5, more preferably, at least 10 and most preferably, at least 20 lamps
  • a transparency viewing device including a faceplate adapted for mounting at least one transparency thereon, a source of back illumination for the transparency, a source of ambient lighting having a variable hue, and a controller which controls the hue ofthe ambient lighting
  • the controller controls the hue of the ambient light responsive to a characteristic of at least a portion of the transparency
  • the characteristic includes the density of the portion of the transparency
  • the characteristic includes the level of detail of the portion of the transparency
  • a method of controlling a pupil size of an eye of an operator viewing a transparency on a viewbox including illuminating the eye with light of a controllable hue, and controlling the hue ofthe light to achieve a desired pupil size
  • the method includes determining a direction of gaze of the eye and controlling the pupil size includes controlling the pupil size responsive to the direction of gaze
  • the hued illumination ofthe eye is achieved using ambient lighting, not direct illumination through a faceplate on which the transparency is usually placed
  • a method of scanning a mammogram including back-illuminating only a portion of a mammogram corresponding to an outer layer of a breast, and subsequently back-illuminating only a second outer layer portion of the breast
  • the method includes serially scanning the entire outer layer of the breast in the mammogram
  • back-illuminating includes graded back-illuminating, such that denser image parts of the portion receive greater amounts of back-illumination than less dense parts thereof
  • the method includes detecting the outer layer of a breast in a mammogram
  • detecting includes detecting the outer layer based on a density analysis of the mammogram Alternatively or additionally, detecting includes detecting the outer layer based on a textural analysis of the mammogram Alternatively or additionally, detecting includes detecting the outer layer based on feature recognition of the breast orientation and location
  • a method of automatic scanning of an x-ray transparency of soft tissue disposed near a bone including masking a low density portion ofthe transparency corresponding to the bone, sequentially back-illuminating at least one substantially only soft tissue portion on both side of the masked bone
  • a method of viewing a transparency including determining at least one characteristic of at least a portion of the transparency, without using color sensing of light passing through the transparency, and back-illuminating the portion with light, where the chromaticity of the back-illumination is dependent on the determined characteristic
  • the at least one characteristic includes chromaticity
  • determining includes receiving an input from a user Alternatively, determining includes reading a marking indicating the chromaticity from the transparency Additionally or alternatively, the at least one characteristic includes density
  • a second portion of the transparency is simultaneously back-illuminated with light having a different chromaticity from light back- illuminating the first portion
  • light transmitted through the first portion has a different chromaticity from light transmitted through the second portion
  • the chromaticity of the back-illumination of a dense portion of the transparency is ofa high color temperature to at least partially compensate for reduced visual acuity due to low levels of light which are transmitted through the dense portion
  • a method of transparency viewing including. back-illuminating a first portion of a transparency to transmit light having a first chromaticity and a first intensity, and back-illuminating a second portion of the transparency to transmit light having a second chromaticity and a second intensity, lower than the first intensity, where the second chromaticity has a higher color temperature than the first chromaticity
  • Fig 1 A is a graph showing the relative sensitivity of a human eye at various wavelengths of light at a first lighting condition
  • Fig IB is a graph showing the relative sensitivity of a human eye at various wavelengths of light at a second lighting condition
  • Fig 2 illustrates the use of different wavelengths of light to back illuminate different portions of a single image
  • Fig 3 is a partial cut-away drawing of a viewbox in accordance with a preferred embodiment ofthe invention.
  • Fig 4 shows a transparency and an ROI thereon in accordance with a scanning method ofthe present invention
  • One aspect of the present invention relates to modifying the chromaticity of the back- illumination of a viewbox responsive to the film density.
  • illumination having about 100 nits emanating from the area of interest, provides optimal reading acuity.
  • the chromaticity of the back-illumination source must generally compensate for wave-length dependent absorbency of the viewbox and/or of the film. It should be understood that it may not be possible, in a practical device to provide both optimum back illumination intensity and chromaticity for all image-carrying film types and densities One particular case where such optimization is not possible arises when viewing very dense portions of film. If such an area has a density of 3 (which is not unusual) the back illumination intensity required for proper viewing is on the order of 100,000 nits, which light intensity is not currently obtainable at a reasonable cost and complexity.
  • the human visual system has two types of photo-detectors, rods and cones.
  • Rods are more sensitive to blue wavelengths (prominent in high color temperature white), while cones are more sensitive to yellow-green wavelengths (prominent in low color temperature white)
  • the studies described in the above cited papers found that for intermediate illumination, both rods and cones are used by the eye for visual tasks Even at typical office lighting levels, the eye is more sensitive to blue-tinted light than to yellow or white light.
  • Fig IA is a graph showing the relative sensitivity of a human eye to various frequencies at a first, high intensity, lighting condition and Fig IB is a graph showing the relative sensitivity of a human eye to various frequencies at a second, low intensity, lighting condition The shift of the maximum visual sensitivity from a long wavelength to a short wavelength is clear from a comparison of the two figures
  • Fig 2 illustrates the use of different wavelengths of light to back illuminate different portions of a single image
  • a lung portion of the image of Fig 2 is very dense, so blue-shifted (cooler) light may be required to achieve a minimal visual acuity, while a spine portion of the image is not very dense, so only low intensity back-illumination levels are required to achieve light levels where redder (warmer) light is more suitable for higher visual acuity
  • FIG. 3 is a partial cut-through drawing of a viewbox 42 in accordance with a preferred embodiment of the invention
  • Viewbox 42 includes a plurality of back illumination sources 4, a display surface 8 which is back illuminated by light sources 4 and a masking device, preferably at least one LC layer 6, which masks the light from light sources 4 to a transparency 10 placed on display surface 8
  • LC 6 is controlled to mask out light from sources 4 to most of display surface 8 and, preferably from at least a part of transparency 10 so that only a region of interest (ROI) of transparency 10 is back-illuminated
  • the chromaticity of the back illumination is controlled based on the intensity of light emanating from the ROI
  • a sensor 44 senses the intensity of light emanating from transparency 10 and a controller 45 controls the chromaticity of the back- illumination in response to this measured intensity
  • the intensity is determined using a scanner which scans transparency 10 during its conveyance from such a storage to display surface 8
  • the chromaticity is manually changed by an operator based on his perception of the intensity of the lighting It is to be appreciated that the precise wavelength of the illumination is dependent not only on psycho-physical consideration but also on subjective considerations such a color with which the operator feels comfortable Normally, these colors are tinted off-white colors, high color temperature white (which is bluish) or low color temperature white (which is red-green)
  • variable amounts of blue-wavelength back-illumination may be provided by using at least one blue light source 5 in addition to light sources 4.
  • the light from light sources 4 and 5 is preferably well mixed prior to reaching display surface 8
  • Methods of mixing light from a multiplicity of light sources is described in the above referenced applications, in particular, WO96/17269
  • a local blue light source such as a white-blue spot light
  • Light source 5 may be provided with a dimmer to fine tune the amount of blue (or white-blue) light added to the back illumination
  • several blue lamps 5 may be provided and the amount of blue controlled by illuminating only some of the lamps
  • a blue filter with a varying density may be provided to change the chromaticity of the back illumination
  • variable wave-length light sources as well known in the art, may be used
  • the chromaticity of the back illumination of an entire transparency is determined based on the average light intensity emanating from the transparency or a portion thereof Alternatively, it is based on the average density of the transparency or a portion thereof and on the intensity of the back illumination
  • different portions of transparency 10 are simultaneously back illuminated with light having different chromaticities
  • the lungs are preferably back-illuminated with light of a shorter wavelength
  • the spine is preferably back illuminated with light of a longer wavelength
  • a backprojection system using an active matrix LCA is preferred, as described in the above PCT application PCT/IL96/00023
  • the local chromaticity of the back-illumination may also be modified by using local tinted lamps or by using a color LCD
  • the precise desired chromaticity of the back illumination may be dependent on the chromaticity and intensity of the light sources and on the chromaticity and density of transparency 10, LC 6 and display surface 8 If viewbox 42 is physically constrained from achieving the desired chromaticity, such as by the availability of blue light when viewing dense film, a tradeoff between back-illumination intensity and back-illumination chromaticity, such that visual acuity is maximized, may be used It should be appreciated that the term visual acuity, as used herein, includes discernability of lesions on x-ray images.
  • light sources 4 and 5 are chosen to include mainly higher color temperature light sources (which provide a high intensity of light) and some lower color temperature light sources (which provide a lower intensity of light)
  • Fluorescent light sources which are generally preferred for viewboxes, emit light having three spectral peaks, red, green and blue
  • the color temperature of the light is determined by the relative intensities of the peaks High color temperature light has higher blue peaks, while lower color temperature light has higher red peaks Since the requirement for high intensity back illumination is correlated with the requirement for high color temperature back illumination, it is preferred that most of the potential light output of the viewbox be of a high color temperature (preferably, after correction for the chromaticity of LC 6 and transparency 10)
  • the balance of light output is preferably low color temperature back illumination
  • This selection of light sources is more energy and space efficient than a half-and-half mix When high light intensities are required for viewing of high density images, all the light sources (or at least the high color temperature ones) are used, resulting in a high intensity blue-shifted back
  • a larger number of different lighting sources than described in the above mentioned applications is used
  • fluorescent or metal halide light sources having peaks at red, blue and green are used and controller 45 can then give a color very close to the desired value by selectively activating certain numbers of lamps at each of the above three narrow spectral bands It should be appreciated that good mixing of the light from the different lamps is desirable and may be achieved as described in the above cited applications, including WO96/ 17269.
  • each lamp has a single narrow spectral peak In another preferred embodiment of the invention, each lamp has more than one narrow spectral peak However, a small number of peaks per lamp is preferred so that it is simpler to determine which combination of lamps will yield the desired back-illumination chromaticity
  • at least 5 narrow-band lamps are used, more preferably, more than 10 lamps are used, most preferably, more than 20 lamps are used
  • a large number of lamps at at least three different spectral bands makes it possible to adapt the chromaticity of the back-illumination to a variety of viewing situations, including, different LCA types, different film types and failure and age of the lamps
  • when fewer colored sources are used, a less exact overall chromaticity is achieved
  • the intensity is optimized and the closest chromaticity to the desired chromaticity possible at the optimum intensity is provided
  • the amount of correction for LC selective absorbency of light may be variable
  • the ratio between transmission of blue and red shades of light may be dependent on the LC density
  • This variance may apply to other types of light valves and also in certain types of light recycling schemes, such as when a PDLCA (polymer dispersed LCA) with chromaticity dependent scattering is used for light recycling
  • a variable chromaticity correction may be calculated from known characteristics ofthe LC or by using a color sensor.
  • an ambient light source 46 is controlled in a manner to affect the pupil size of an eye of an operator using viewbox 42.
  • the ambient illumination is adjusted for each operator manually, by the operator selecting the ambient lighting which provides him with the greatest ability to discern lesions in an x-ray transparency
  • it can be adjusted automatically, using a camera, or other sensor, as known in the art, which senses the operator's pupil size and/or gaze direction
  • Automatic adjustment may be based on at least one preset value determined manually by the operator
  • a gaze-direction sensor may also require a position determining system, which determines the position and orientation ofthe operator relative to the viewbox
  • ambient lighting chromaticity and/or intensity and back illumination chromaticity and/or intensity are controlled based on pupil size and/or direction ofthe gaze of the operator.
  • Fig 4 shows a transparency 62 and an ROI 66 thereon in accordance with a scanning method of the present invention
  • ROI 66 scans along a skin line 68 of a breast 69 (i e , the edge of the breast) in transparency 62
  • this scanning is performed automatically
  • at least two images 62 are scanned simultaneously
  • a physician may quickly and easily compare image portions of two breasts (which corresponding portions should look the same) or compare a current mammography to a previous study, to determine time-related changes
  • image 62 is masked so that only skin 68 is back-illuminated (i e , the ROI is not rectangular).
  • Skin 68 may be automatically detected in several ways
  • One method is based on the uniform configuration of breasts in mammography
  • the breast is assumed to have a generally triangular configuration, with the skin forming the outside of the triangle
  • the skin area may be differentiated from inner portions 70 of the breast based on the density of the skin Alternatively, this differentiation may be based on texture, since inner portions 70 usually have small specks 72, which are shadows of glandular tissue
  • ROI 66 is preferably not uniform in back-illumination, since even in skin areas a range of an order of magnitude of densities may be expected Rather, a soft-mask, as described in WO96/ 17269, which does not have a sharp border between back-illuminated portions and dark portions, may be used In a preferred soft-mask, the intensity of back-illumination within the ROI is lower where the density of the underlying image is lower and is higher where the density of the underlying image is higher This type of graded masking is preferably achieved using a backprojection system
  • Skin scanning is generally useful in cases where the image is symmetric, such as in the breast, so that two (supposedly equal) tissue portions may be compared
  • skin scanning may be applied in other cases where a dense portion of an image is located next to a portion with much lower density
  • One particular example is when searching for a hemorrhage which indicates a fracture in a cervical spine image
  • the glare from the spine itself is preferably masked and the illumination for the adjoining soft tissue (in which a hemorrhage may be located) is optimized
  • the soft tissue on both two sides of the spine may be compared to determine abnormalities
  • Other examples in muscular-skeletal x-ray imaging include viewing soft tissue located near long bones (such as the femur)
  • a rectangular back-illuminated ROI sequentially scans an image parallel to a bone or other low density portion in the image
  • the glare from the bone is masked out in the scanning ROI
  • the extent of the bone in the ROI is determined for each slot position and masked accordingly
  • the film type of the transparency (and thus its chromaticity) are read off the film by the viewbox
  • One method of reading information from a transparency is disclosed in the above cited WO93/01564, whereby the viewbox reads bar-coded information from the transparency Alternatively or additionally, especially in an alternator, such information is read when the transparency is conveyed from a storage to a display surface
  • the liquid crystal chromaticity is measured in the factory or in situ without the film and the correction required for this chromaticity is stored in controller 45 The correction based on the type of film is added to that of the liquid crystal Alternatively, correction factors (intensities of the various chromatic light sources) are stored for the combinations of film and liquid crystal types
  • color correction also depends on the density of the film If the color correction is made in the closed loop mode as described in the above-mentioned applications, for example WO96/17269, then color correction will be optimized for the particular film or region of interest of the film which is illuminated However, this type of optimization can be made without any color sensors for determining the actual chromaticity of the light passing through the film
  • controller 45 automatically increases the lighting to a desired level based on a measurement of the light intensity passing through the film
  • the light intensity of the back-illumination source (either as measured by a detector or as determined by commands from controller 45) is compared to the light intensity measured by the camera The ratio between these intensities indicates the density of the film which can then be used to adjust the desired color of the back-illumination source to correct for the overall chromaticity of the liquid crystal and film at the density of the entire transparency or the region of interest being viewed

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention se rapporte à un dispositif de visualisation de transparents comprenant une plaque frontale conçue pour se fixer à au moins un transparent présentant une densité particulière sur une de ses parties, une source de rétro-éclairage destinée au transparent et un régulateur qui modifie la chrominance du rétro-éclairage en fonction de la densité donnée. De préférence, le régulateur modifie la chrominance en fonction de la chrominance du transparent. Eventuellement, le régulateur modifie localement la chrominance.
PCT/IL1996/000163 1989-12-31 1996-11-24 Adaptation de chrominance WO1997019371A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP09519569A JP2001500274A (ja) 1995-11-24 1996-11-24 色度順応
EP96938447A EP0990189A4 (fr) 1995-11-24 1996-11-24 Adaptation de chrominance
AU75859/96A AU7585996A (en) 1995-11-24 1996-11-24 Chromaticity adaptation
US08/760,652 US6311419B1 (en) 1989-12-31 1996-12-04 Dedicated mammogram viewer

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
US752295P 1995-11-24 1995-11-24
US60/007,522 1995-11-24
PCT/EP1995/004693 WO1996017269A2 (fr) 1994-11-28 1995-11-27 Dispositif d'affichage
ATPCT/EP95/04693 1995-11-27
IL116244 1995-12-03
IL11624495A IL116244A0 (en) 1995-12-03 1995-12-03 Chromaticity correction
IL116252 1995-12-04
IL11625295A IL116252A0 (en) 1995-12-04 1995-12-04 Dedicated mammogram viewer
US836095P 1995-12-07 1995-12-07
IL119407 1996-10-10
IL11940796A IL119407A0 (en) 1995-11-24 1996-10-10 Local chromaticity correction

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US08/849,125 Continuation-In-Part US6269565B1 (en) 1994-11-28 1995-11-27 Display device
PCT/EP1995/004693 Continuation-In-Part WO1996017269A2 (fr) 1994-11-28 1995-11-27 Dispositif d'affichage

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US08/760,652 Continuation-In-Part US6311419B1 (en) 1989-12-31 1996-12-04 Dedicated mammogram viewer

Publications (3)

Publication Number Publication Date
WO1997019371A2 true WO1997019371A2 (fr) 1997-05-29
WO1997019371A3 WO1997019371A3 (fr) 1997-07-03
WO1997019371B1 WO1997019371B1 (fr) 1997-07-31

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Application Number Title Priority Date Filing Date
PCT/IL1996/000163 WO1997019371A2 (fr) 1989-12-31 1996-11-24 Adaptation de chrominance

Country Status (4)

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JP (1) JP2001500274A (fr)
AU (1) AU7585996A (fr)
IL (1) IL119407A0 (fr)
WO (1) WO1997019371A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021625A2 (fr) 1996-11-10 1998-05-22 Smartlight Limited Film a latitude etendue
GB2335285A (en) * 1998-03-10 1999-09-15 Rad Tec Products Limited Mammogram viewing reference system
US6246450B1 (en) 1997-01-09 2001-06-12 Smartlight Ltd. Backprojection transparency viewer
US6269565B1 (en) 1994-11-28 2001-08-07 Smartlight Ltd. Display device
US12141342B2 (en) 2019-02-01 2024-11-12 Apple Inc. Biofeedback method of modulating digital content to invoke greater pupil radius response

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Publication number Priority date Publication date Assignee Title
JP2010038995A (ja) * 2008-07-31 2010-02-18 Sharp Corp 観察用照明装置及び観察用照明方法
JP6356814B2 (ja) * 2013-09-13 2018-07-11 コニカ ミノルタ ラボラトリー ユー．エス．エー．，インコーポレイテッド 光源の最適化されたパワースペクトル分布

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JP2001500274A (ja) 2001-01-09
IL119407A0 (en) 1997-01-10
WO1997019371A3 (fr) 1997-07-03
AU7585996A (en) 1997-06-11

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