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WO2002041629A1 - Dispositif de generation de fichiers images et appareil-photo numerique - Google Patents

Dispositif de generation de fichiers images et appareil-photo numerique Download PDF

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Publication number
WO2002041629A1
WO2002041629A1 PCT/JP2001/010009 JP0110009W WO0241629A1 WO 2002041629 A1 WO2002041629 A1 WO 2002041629A1 JP 0110009 W JP0110009 W JP 0110009W WO 0241629 A1 WO0241629 A1 WO 0241629A1
Authority
WO
WIPO (PCT)
Prior art keywords
image data
pixels
reduced
file
reduced image
Prior art date
Application number
PCT/JP2001/010009
Other languages
English (en)
Japanese (ja)
Inventor
Ryuichi Shiohara
Yasumasa Nakajima
Kazunori Suenaga
Original Assignee
Seiko Epson Corporation
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
Application filed by Seiko Epson Corporation filed Critical Seiko Epson Corporation
Priority to JP2002543227A priority Critical patent/JPWO2002041629A1/ja
Publication of WO2002041629A1 publication Critical patent/WO2002041629A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N1/32128—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title attached to the image data, e.g. file header, transmitted message header, information on the same page or in the same computer file as the image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3225—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
    • H04N2201/325—Modified version of the image, e.g. part of the image, image reduced in size or resolution, thumbnail or screennail
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3274—Storage or retrieval of prestored additional information
    • H04N2201/3277—The additional information being stored in the same storage device as the image data

Definitions

  • the present invention relates to a technique for filing, transferring, displaying, and printing an image.
  • thumbnail image data of 160 x 120 pixels specified by Exif is suitable for recording and high-speed display due to the small amount of data, but is clearly output during display and printing. There is a problem that an image becomes coarse.
  • An object of the present invention is to generate or operate an image file capable of improving the quality of an output image for confirmation in accordance with technological development without impairing the convenience of using images between devices.
  • An object of the present invention is to provide an image file generation device, a digital still camera, and an image file operation program.
  • Another object of the present invention is to provide an image processing apparatus capable of transferring image data having a small data size to a communication device.
  • the image file generation device generates two reduced image data from input main image data, and combines these two reduced image data with the main image data.
  • the second reduced image data can be maintained while maintaining file compatibility between devices corresponding to EXif.
  • the image quality of the output image for confirmation can be improved using the second reduced image data.
  • the image quality of the output image for confirmation can be arbitrarily selected from options prepared in advance. .
  • the image quality of the output image for confirmation can be arbitrarily changed.
  • the number of pixels corresponding to the number of pixels at the time of outputting the image data is reduced.
  • the speed of the enlargement / reduction processing can be increased.
  • the digital still camera according to the second aspect of the invention displays the second reduced image data on the display device, so that the captured image can be displayed and confirmed at high speed with high image quality.
  • the timing for generating the second reduced image data can be arbitrarily determined, or a configuration in which it is possible to switch whether or not to generate the second reduced image data immediately after shooting.
  • This makes it possible to reduce the amount of processing immediately after shooting during continuous shooting to shorten the shooting interval, or to reduce the overall amount of processing required for file generation, as needed.
  • at least the second reduced image Since the amount of data to be generated increases the processing amount immediately after shooting, the shooting interval at which continuous shooting is possible becomes longer.
  • the main image data when the main image data is compressed and stored in the non-volatile recording medium, the main image data is expanded and called in the main storage device, and when the second reduced image data is generated from the main image data, continuous shooting is possible.
  • the shooting interval can be shortened, the data processing amount as a whole increases, so the power consumption increases and the number of shootable images decreases.
  • the timing at which the second reduced image data is generated has advantages and disadvantages. Therefore, a configuration may be adopted in which the photographer can determine the timing for generating the second reduced image data as needed.
  • the digital still camera selects main image data or reduced image data from a file and transfers the selected image data to the communication device.
  • Image data can be transferred to another communication device through a telecommunication line in a short time.
  • the digital still camera generates reduced image data having a smaller number of pixels than the image data from the image data, and transmits the reduced image data to the communication device.
  • Image data can be transferred to another communication device via a telecommunication line in a shorter time than when data is transferred via a telecommunication line. Furthermore, by generating the reduced image data before the communication starts, the time from the start of the communication to the completion of the transmission of the reduced image data is shortened compared to the case of generating the reduced image data after the communication starts. be able to.
  • the image processing program is to output and select or print or display the second reduced image data having the second largest number of pixels from an image file having three image data having different numbers of pixels from each other.
  • the image quality of the image can be improved.
  • FIG. 1 is a schematic diagram showing the structure of a first embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating the configuration according to the first embodiment of the present invention.
  • FIG. 3 shows a second embodiment of the present invention.
  • FIG. 4 is a schematic diagram for explaining the operation of the second embodiment of the present invention.
  • FIG. 2 shows a first embodiment of the image file generating apparatus according to the present invention. Shows camera 1.
  • the ⁇ means for inputting main image data '' described in the claims mainly comprises an optical system 11, an area sensor 12, an AFE (Analog Front End) 13, an image generation unit 14, and a color space conversion unit 15. Is done.
  • the “first image data generating means” and the “second image data generating means” described in the claims are mainly configured by the control unit 19.
  • the “file means” described in the claims mainly includes a control unit 19, a compression processing unit 16, and a file unit 17.
  • the “recording medium” described in the claims is constituted by the removable memory 18.
  • the “means for displaying” described in the claims is mainly configured by the control unit 19 and the display unit 22.
  • “Starting means” and “switching means” described in the claims are mainly constituted by the operation unit 21.
  • the optical system 11 includes an optical lens, an infrared cut filter, an optical low-pass filter, and the like, and forms an image of a subject as an input image on the area sensor 12.
  • the area sensor 12 is an optical sensor such as a CCD sensor or a CMOS sensor having a photoelectric conversion element group.Each photoelectric conversion element has one of C (Cyan), M (Magenta), Y (Yellow), and G (Green). A complementary color fill is provided. Each photoelectric conversion element is arranged in a matrix. The purpose of acquiring G color information in addition to CMY color information is to improve image quality by capturing G color information that is visually perceived as raw information. In the following description, it is assumed that an area sensor in which each of the photoelectric conversion elements is provided with a complementary color filter of C, M, Y, or G is used. A three-color complementary filter or RGB (Red, Green, Blue) primary color filters may be used. The analog signal of each color output from the area sensor 12 is input to the AFE 12.
  • RGB Red, Green, Blue
  • the AFE 13 includes a program gain amplifier, a CDS circuit, an A / D converter, etc., samples analog signals output from each photoelectric conversion element and generates digital data of 10 to 12 bits for each color of CMYG. Digital data of CM YG The evening is input directly to the image generating unit 14 or after being stored in the buffer memory.
  • the image generation unit 14 is configured by a hardware method by controlling the AS IC in which a predetermined algorithm is realized by a logic circuit by the control unit 19, or by a software method using a DSP (Digital Signal Processor) engine. It is composed of When ASIC is used for the image generation unit 14, there is an advantage that the processing can be speeded up as compared with the case where the image generation unit 14 is configured by a software method.
  • the image generation unit 14 performs automatic exposure processing (AE: Auto Exposure), automatic white balance processing (AWB: Auto White Balance), image generation processing, conversion processing from the CM YG color space to the RGB color space, and key correction. Processing is performed.
  • AE Auto Exposure
  • AMB Auto White Balance
  • the image generation processing here mainly generates image data having four values of each color of CMYG for each pixel using digital data representing the intensity of one of CMYG corresponding to the output of each photoelectric conversion element. This is the process to be performed.
  • the conversion process from the CMYG color space to the RGB color space is performed by a hardware method using a 4 ⁇ 3 matrix operation processing circuit or a software method using a CPU using a multiplication circuit and an addition / subtraction circuit.
  • the color space conversion unit 15 is configured by a 3 ⁇ 3 matrix operation processing circuit, or is configured by a software method in a CPU 30 or the like using a multiplication circuit and an addition / subtraction circuit. Generate YCbCr digital pixel data from digital pixel data. In order to compress and record in the removable memory 18 in the JPEG file format, the color space converter 15 needs to output YCbCr digital pixel data rounded to 8 bits. For color space conversion, use the following formula based on ITU-R BT.601,
  • Y 0.2990R + .05870G + 0.1140B
  • the compression processing section 16 is generally a dedicated chip for JPEG compression processing, and is configured by a hardware method, but can also be configured by a software method using DSP.
  • the compression processing section 16 performs J ⁇ G compression processing by discrete cosine transform (DCT) and Huffman coding.
  • the compression processing section 16 may be provided with a function of decompressing a JPEG file so that the recorded image data can be quickly checked on the display section 22.
  • the file unit 17 records the JPEG-compressed image data in a removable memory 18 such as a compact flash memory by an Ex if file format.
  • the control unit 19 is a microcomputer including a CPU 30, a R ⁇ M 31, a RAM 32, and the like. It is evening.
  • the control unit 19 executes the control program stored in the R ⁇ M 31 on the CPU 30 to execute the optical system 11, the area sensor 12, the AFE 13, the image generation unit 14, the color space conversion unit 15, the compression processing unit 16, In addition to controlling the file unit 17, etc., it also performs main image data reduction processing composed of YCbCr pixel data generated by the color space conversion unit 15, and stores a 160 x 120 pixel thumbnail image in the RAM 32. Generate data and 320 x 240 pixel Q VGA image data.
  • the RAM 32 temporarily stores main image data composed of YCbCr pixel data generated by the image generation unit 14, its reduced image data, a control program, and the like.
  • the thumbnail image data corresponds to the first reduced image data described in the claims
  • the QVGA image data corresponds to the second reduced image data described in the claims.
  • the program may be executed in a software-like manner by executing the program: Also, when generating the thumbnail image data and another reduced image data in the second reduced image data, the number of pixels of the reduced image data is set to 3 here.
  • the second reduced image data is image data that can be printed with sufficiently high image quality as an image for confirmation.In addition, immediately after shooting, it is composed of YCbCr pixel data generated by the color space conversion unit 15.
  • the file may be recorded in the removable memory 18 and then the main image data may be called from the removable memory 18 at the request of the user to generate the QVGA image data from the main image data.
  • the user's request is accepted by an input using a key provided in the operation unit 21 as “activation means” described in the claims.
  • whether or not to generate QVGA image data immediately after shooting is set by the user by inputting with a key provided on the operation unit 21 as “switching means” described in the claims.
  • the amount of processing for generating QVGA image data can be reduced.
  • the continuous shooting interval can be shortened by reducing the processing amount immediately after shooting. it can. Since the main image data is compressed and recorded in the removable memory 18, when generating QVGA image data from the main image data once recorded in the removable memory 18, a separate decoding process is performed. Management is required.
  • the display unit 22 as a display device described in the claims includes a video memory, an LCD (Liquid Crystal Display), and the like, and has a size of 320 ⁇ 240 pixels out of the image data reduced by the CPU 30.
  • Display image data (hereinafter referred to as Q VGA image data) on the LCD.
  • thumbnail image data of 160 ⁇ 120 pixels may be displayed on the LCD.
  • the QVGA image data or the thumbnail image data is read out from the removable bubble memory 18, decompressed, and displayed on a screen such as an LCD.
  • the operation unit 21 is provided around the LCD It consists of various setting switches, power switch, shutter button, etc.
  • the two reduced image data generated in the RAM 32 by the CPU 30 are compressed together with the main image data according to the JPEG system, and are recorded together with predetermined auxiliary information as a file having a data structure conforming to EXif.
  • auxiliary information As a file having a data structure conforming to EXif.
  • the abbreviations used in the figures are the abbreviations used in the digital still camera image file format standard issued by the Japan Electronic Industry Development Association.
  • the description of the main image data, thumbnail image data and their accompanying information is omitted because it is sufficient to record them in a format conforming to Exif 2.1.
  • Compressed QVGA image data and its accompanying information are compressed in the first thumbnail data segment of APP1 (application marker segment 1). It is stored in the segment (QVGA data) following the thumbnail image data and its attached information.
  • the additional information here is necessary for decoding processing such as quantization tables and Huffman tables Information.
  • the QVGA header includes a segment (QVGA 2 On / Off) indicating whether or not the file contains QVGA data, the data size and tag of the QVGA data, the pixel size of the QVGA image data, the offset to the QVGA image data, And a segment (QVGA) indicating the data length of the QVGA image data.
  • the data of the QVGA header may be recorded in the Exif IFD, which is one layer up from the maker note. In this case, a dedicated tag is recorded in the Ex IFD segment, and QVGA header data is recorded following the dedicated tag.
  • the offset data can be used to directly access the beginning of the QVGA data segment from the position of the offset data.
  • the Ex if is supported by inserting the QVGA image data of 320 X 240 pixels in a predetermined position of the Ex if file in addition to the thumbnail image data of 160 X 120 pixels. It is possible to improve the image quality of the output image for confirmation without deteriorating the convenience of using the image between the devices.
  • the QVGA image data size of 320 x 240 pixels is ideal for displaying on a mobile phone's LCD screen.
  • the present invention can be applied to a digital still camera as well as any image processing apparatus that records an image file on a recording medium in the format described above.
  • a procedure for recording image data in the format described above can be incorporated in the photo retouching application.
  • the function of “means for inputting main image data” described in the claims is provided by an optical system 11, an area sensor 12, an AFE (Analog Front End) 13, an image generation unit 14, Although described as a function of the color space conversion unit 15, for example, when the image file generation device is realized as a personal computer, an input / output device that reads and writes a removable memory for exchanging data between the digital camera and the personal computer is used.
  • the function of “means for inputting main image data” may be realized as the function.
  • FIG. 3 shows a digital still camera 2 with a B1ueTooth interface as a second embodiment of the image file generating apparatus according to the present invention.
  • the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and description thereof is omitted.
  • the connecting means described in the claims is constituted by a B1ueTooth interface (BTIF) 23.
  • the transfer means described in the claims is mainly constituted by the control unit 19.
  • the BT IF 23 is composed of a DZA converter, an oscillation circuit, a modulation circuit, an antenna, etc., and performs data communication between the mobile phone and the digital still camera 2 away from the digital still camera 2 using short-range wireless communication. Is possible.
  • the control unit 19 notifies the BT I F 23 of information necessary for receiving the data transmitted from the digital still camera 2 by the transfer destination mobile phone.
  • the information required by the transfer destination mobile phone is recorded in a flash memory or the like (not shown) by the user using the operation unit 21 in advance.
  • the BTIF 23 performs DZA conversion on the data transferred to the BTIF23, and transfers the data to a mobile phone on a predetermined carrier.
  • the CPU 30 stores data stored in an auxiliary storage device such as a flash memory (not shown).
  • the BT IF 23 transmits QVGA image data generated from the main image data of the Ex i: f file, part or all of the Ex i: f file recorded in the removable memory 18 or the Ex if file.
  • the type of data transmitted through BT IF 23 is selected by the user.
  • the system constituted by the CPU 30 executing the data transfer program causes the display unit 22 to display a choice of transmission data, and waits for a user input from the operation unit 21.
  • Options for outgoing data include those that transmit the entire Ex if file, those that extract and transmit the main image data and its accompanying information from the Ex if file, and those that extract the QVGA image data and its accompanying information from the Ex if file. And the one that extracts thumbnail image data and its attached information from the Ex if file and sends it.
  • the option When the user operates the operation unit 21 to select one of the options, the option is notified to the control unit 19.
  • the data When transferring data to a device distant from the BTIF 23, the data is not only transferred to the mobile phone 4 (see Fig. 4) that has been set as a communication destination, but also transmitted remotely through the mobile phone communication network using the mobile phone 4 as a node. It is also possible to transfer to a local mobile phone 3 or to a remote computer 5 via the Internet.
  • the address information of the remote terminal can be input using the operation unit 21.Data transfer is performed by directly specifying the transfer destination using the digital still camera 2. Alternatively, data can be temporarily transferred to the mobile phone 3 and then transferred to another terminal using the Internet mail function of the mobile phone 3 or the like.
  • the transfer destination is directly specified by the digital still camera 2 and data is transferred to a remote terminal during communication with the mobile phone 4, it is desirable to generate the data to be transferred before starting communication. .
  • Q VGA data to be transferred is generated after the start of communication, the time required from the start of communication to the completion of data transfer is lengthened, resulting in an increase in communication cost.
  • the interface between the digital still camera 2 and the mobile phone 4 is not limited to B1eTooth, but may be, for example, a cable connection.
  • image data having a small data size can be transferred to a mobile phone (third embodiment).
  • an image processing program according to a third embodiment of the present invention will be described.
  • the image processing program according to the third embodiment is recorded on, for example, a personal computer 5 shown in FIG.
  • This image processing program extracts QVGA image data from a plurality of Ex if files recorded on a given volume, and displays or prints a list on a display, and determines what image data is recorded on that volume. This is a program to confirm.
  • the image is displayed and printed based on the QVGA image data having a larger number of pixels than the thumbnail image data, so that the image quality of the output image for confirmation can be improved.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Television Signal Processing For Recording (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne des données images miniatures et des données images QVGA générées à partir de données images principales d'entrée et deux éléments de données images réduites stockés dans un support d'enregistrement comme un fichier Exif conjointement avec les données images principales. Une inclusion dans le fichier Exif de données images QVGA supérieures au niveau du nombre de pixels aux données d'images miniatures permet une sortie d'image à vitesse super élevée/à faible qualité d'image, une sortie d'image à vitesse élevée/ à qualité d'image intermédiaire et une sortie d'image à faible vitesse/à qualité d'image élevée, permettant ainsi une sélection des éléments de données images réduites à utiliser comme image de confirmation, en fonction d'un dispositif de sortie d'images.
PCT/JP2001/010009 2000-11-16 2001-11-15 Dispositif de generation de fichiers images et appareil-photo numerique WO2002041629A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002543227A JPWO2002041629A1 (ja) 2000-11-16 2001-11-15 画像ファイル生成装置及びディジタルスチルカメラ

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Application Number Priority Date Filing Date Title
JP2000349453 2000-11-16
JP2000-349453 2000-11-16

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WO2002041629A1 true WO2002041629A1 (fr) 2002-05-23

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Cited By (8)

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JP2007336065A (ja) * 2006-06-13 2007-12-27 Sony Corp 画像記録装置、画像記録方法及び画像記録プログラム
WO2009066471A1 (fr) * 2007-11-21 2009-05-28 Panasonic Corporation Appareil de création de fichier
US7570296B2 (en) 2002-08-02 2009-08-04 Fujifilm Corporation Photographing system
EP2172904A1 (fr) * 2007-10-03 2010-04-07 Fujifilm Corporation Appareil de détermination d'effacement erroné, procédé et produit de programme informatique, et appareil de génération de fichier image
US7836091B2 (en) 2003-12-19 2010-11-16 Sharp Laboratories Of America, Inc. Systems and methods for providing access to an embedded thumbnail image
JP2011211625A (ja) * 2010-03-30 2011-10-20 Sony Corp 送信装置及び方法、並びにプログラム
US10170082B2 (en) 2010-10-04 2019-01-01 Nec Corporation Image display device and image display method
US12143349B2 (en) 2021-01-12 2024-11-12 Samsung Electronics Co., Ltd. Electronic device for processing message and operating method thereof

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7570296B2 (en) 2002-08-02 2009-08-04 Fujifilm Corporation Photographing system
US7836091B2 (en) 2003-12-19 2010-11-16 Sharp Laboratories Of America, Inc. Systems and methods for providing access to an embedded thumbnail image
JP4596274B2 (ja) * 2006-06-13 2010-12-08 ソニー株式会社 画像記録装置、画像記録方法及び画像記録プログラム
JP2007336065A (ja) * 2006-06-13 2007-12-27 Sony Corp 画像記録装置、画像記録方法及び画像記録プログラム
EP2172904A1 (fr) * 2007-10-03 2010-04-07 Fujifilm Corporation Appareil de détermination d'effacement erroné, procédé et produit de programme informatique, et appareil de génération de fichier image
US8018493B2 (en) 2007-11-21 2011-09-13 Panasonic Corporation Image data transfer apparatus
WO2009066471A1 (fr) * 2007-11-21 2009-05-28 Panasonic Corporation Appareil de création de fichier
US8259193B2 (en) 2007-11-21 2012-09-04 Panasonic Corporation Image file reproduction apparatus and image data reproduction apparatus
JP2011211625A (ja) * 2010-03-30 2011-10-20 Sony Corp 送信装置及び方法、並びにプログラム
US9686439B2 (en) 2010-03-30 2017-06-20 Sony Corporation Transmission device, transmission method and program
US10170082B2 (en) 2010-10-04 2019-01-01 Nec Corporation Image display device and image display method
US10748507B2 (en) 2010-10-04 2020-08-18 Nec Corporation Image display device, image list display method, and image list display program
US12143349B2 (en) 2021-01-12 2024-11-12 Samsung Electronics Co., Ltd. Electronic device for processing message and operating method thereof

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