KR19980065864A - How to create a thumbnail image on a digital still camera - Google Patents

How to create a thumbnail image on a digital still camera Download PDF

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KR19980065864A
KR19980065864A KR1019970001043A KR19970001043A KR19980065864A KR 19980065864 A KR19980065864 A KR 19980065864A KR 1019970001043 A KR1019970001043 A KR 1019970001043A KR 19970001043 A KR19970001043 A KR 19970001043A KR 19980065864 A KR19980065864 A KR 19980065864A
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still camera
digital still
thumbnail image
image
thumbnail
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KR1019970001043A
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KR100211840B1 (en
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이건희
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김광호
삼성전자 주식회사
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    • 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
    • H04N1/0035—User-machine interface; Control console
    • H04N1/00405—Output means
    • H04N1/00408—Display of information to the user, e.g. menus
    • H04N1/0044—Display of information to the user, e.g. menus for image preview or review, e.g. to help the user position a sheet
    • 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
    • H04N1/21—Intermediate information storage
    • H04N1/2104—Intermediate information storage for one or a few pictures
    • H04N1/2112—Intermediate information storage for one or a few pictures using still video cameras
    • 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
    • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
    • H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
    • H04N1/32154—Transform domain methods
    • H04N1/32165—Transform domain methods using cosine transforms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124—Quantisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/129—Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2101/00—Still video cameras

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Television Signal Processing For Recording (AREA)
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Abstract

가. 청구범위에 기재된 발명이 속하는 기술분야end. The technical field to which the invention described in the claims belongs

디지털 스틸 카메라Digital still camera

나. 발명이 해결하려고 하는 기술적 과제I. The technical problem that the invention is trying to solve

디지털 스틸 카메라에서 촬상된 화면을 엄지손톱(thumbnail) 이미지로 변환한다.The image captured by the digital still camera is converted into a thumbnail image.

다. 발명의 해결 방법의 요지All. Summary of the Solution of the Invention

디지털 스틸 카메라에서 촬상된 영상 데이터를 JPEG 압축 처리하는 과정과, 상기 JPEG 압축 처리 과정에서 생성된 DC 계수를 추출하여 별도의 버퍼에 저장하는 과정과, 상기 버퍼에 저장된 상기 DC 계수를 플래시메모리의 엄지손톱 영역에 기록하여 엄지손톱 이미지를 생성하는 과정으로 구성된다.JPEG compression processing of the image data captured by the digital still camera; extracting and storing the DC coefficients generated in the JPEG compression process in a separate buffer; and storing the DC coefficients stored in the buffer in the thumb of the flash memory. The process consists of creating a thumbnail image by recording on the nail area.

라. 발명의 중요한 용도la. Important uses of the invention

디지털 스틸 카메라에서 촬상된 화면을 간단히 엄지손톱 이미지로 변환할 수 있다.You can easily convert the screen shot from a digital still camera into a thumbnail image.

Description

디지털 스틸 카메라에서 엄지손톱(thumbnail) 이미지 생성 방법How to create a thumbnail image on a digital still camera

본 발명은 디지털 스틸 카메라에서 엄지손톱(thumbnail) 이미지를 생성하는 방법에 관한 것으로, 특히 디지털 스틸 카메라에서 촬상된 화면을 JPEG 압축 처리하는 과정을 통해 엄지손톱 이미지를 생성하는 방법에 관한 것이다.The present invention relates to a method of generating a thumbnail image in a digital still camera, and more particularly, to a method of generating a thumbnail image through a process of performing JPEG compression on a screen captured by a digital still camera.

통상적으로 컴퓨터는 디지털 스틸 카메라로부터 촬상된 화면의 대략적인 윤곽에 대한 아주 작은 이미지인 엄지손톱 이미지를 생성하여, 상기 디지털 스틸 카메라에서 촬상된 화면을 검색한다.Computers typically generate thumbnail images, which are very small images of the approximate outline of the screen taken from a digital still camera, to retrieve the screen shot from the digital still camera.

도1은 본 발명이 적용되는 디지털 스틸 카메라의 개략적인 블록 구성도로서, 렌즈100과 CCD110과 드라이브111과 TG/SSG112과 CDS/AGC120과 A/D변환부130과 다이나믹램140과 중앙처리장치150과 비디오램160과 엔코더170과 표시부180과 플래시메모리190으로 구성된다.1 is a schematic block diagram of a digital still camera to which the present invention is applied and includes a lens 100, a CCD110, a drive 111, a TG / SSG112, a CDS / AGC120, an A / D converter 130, a dynamic RAM 140, and a central processing unit 150. And video RAM 160, encoder 170, display unit 180 and flash memory 190.

도1을 참조하여, 본 발명이 적용되는 디지털 스틸 카메라의 개략적인 동작을 설명한다. 렌즈100은 피사체에서 반사된 빛을 집광하여, CCD(Charge Coupled Device)110으로 광신호를 전달한다. CCD110은 드라이브111에 의해 구동되며, TG(Timing Generator)112에 의해 생성된 클럭에 동기되어, 상기 광신호를 전기신호로 변환하여 CDS/AGC120에 전달한다. CDS/AGC120은 TG/SSG112의 제어하에 상기 전달된 전기신호에 포함된 노이즈를 제거하고, 이득을 조정하여 A/D변환부130으로 전달한다. A/D변환부130은 TG/SSG112의 제어하에 CDS/AGC120로부터 전달되는 전기신호를 디지털신호로 변환한다. 다이나믹램140은 A/D변환부130에서 디지털신호로 변환된 영상신호를 임시 저장한다. 중앙처리장치150은 상기 디지털신호로 변환된 영상신호에 대해 필요한 신호처리 및 플래시메모리190으로의 저장시에 필요한 정지 화상 압축 규격 JPEG(Joint Picture Experts Group) 처리를 수행한다. 중앙처리장치150은 촬상시 JPEG 압축 처리를 수행하고, 재생시 JPEG 디코딩 처리 수행을 한다. 비디오램160은 상기 신호처리된 영상 데이터를 저장하고, 엔코더170으로 상기 영상 데이터를 전달한다. 엔코더170은 비디오 엔코딩용으로서, 상기 영상 데이터를 전달받아 Y, Cr, Cb 변환 및 믹스(mix)과정을 거쳐 표시부180으로 출력한다. 표시부180은 TFT LCD로 구현되며, 엔코더170으로부터 전달된 상기 영상신호를 출력한다. 한편, 플래시메모리190은 영상 데이터를 처리하는 과정에서 압축된 원래의 영상 데이터와 별도로 작은 이미지인 엄지손톱 이미지를 생성하여 저장한다. 원래 영상 데이터는 압축되더라도 상당히 크기가 큰 데이터이므로, RS232와 같은 직렬통신라인을 통한 전송시 상기 영상 압축 데이터를 전송하는데 상당한 시간이 소모되는 문제점이 있다. 또한, 컴퓨터를 통해 저장된 영상 데이터를 보고자 하는 경우 상기 영상 데이터 중 원하는 화상을 보기 위해서 상기 저장된 영상 데이터를 전부 검색하면, 그 만큼 시간이 많이 소모되는 문제점이 있다. 상기와 같은 영상 데이터를 검색하는 과정에서는 원래의 영상 데이터 전부가 필요한 것보다 대략적인 윤곽을 통해 상기 영상 데이터를 검색하면, 그 만큼 검색 시간이 감소된다. 따라서, 이러한 영상 데이터를 검색하는 과정에서 영상 화면의 대략적인 윤곽을 인식하기 위해 상기 엄지손톱 이미지를 이용한다.Referring to Fig. 1, a schematic operation of a digital still camera to which the present invention is applied will be described. The lens 100 collects light reflected from a subject and transmits an optical signal to a charge coupled device (CCD) 110. The CCD 110 is driven by the drive 111 and is synchronized with the clock generated by the Timing Generator (TG) 112 to convert the optical signal into an electrical signal and transmit it to the CDS / AGC120. The CDS / AGC120 removes noise included in the transmitted electric signal under the control of TG / SSG112, adjusts the gain, and transmits the gain to the A / D converter 130. The A / D converter 130 converts an electric signal transmitted from the CDS / AGC120 into a digital signal under the control of the TG / SSG112. The dynamic RAM 140 temporarily stores an image signal converted into a digital signal by the A / D converter 130. The central processing unit 150 performs the necessary signal processing and still picture compression standard JPEG (Joint Picture Experts Group) processing for storing the image signal converted into the digital signal to the flash memory 190. The central processing unit 150 performs JPEG compression processing at the time of imaging, and performs JPEG decoding processing at the time of reproduction. The video RAM 160 stores the signal processed image data and transmits the image data to the encoder 170. The encoder 170 is used for video encoding, and receives the image data and outputs the image data to the display unit 180 through Y, Cr, Cb conversion and mixing. The display unit 180 is implemented by a TFT LCD and outputs the image signal transmitted from the encoder 170. Meanwhile, the flash memory 190 generates and stores a thumbnail image, which is a small image, separate from the compressed original image data in the process of processing the image data. Since the original video data is considerably large in size even though it is compressed, there is a problem in that a considerable amount of time is consumed in transmitting the video compressed data during transmission through a serial communication line such as RS232. In addition, when the user wants to view the stored image data through a computer, if all of the stored image data is searched to see a desired image among the image data, there is a problem in that much time is consumed. In the process of retrieving such image data, the retrieval time is reduced by retrieving the image data through a rough outline than all the original image data is required. Therefore, the thumbnail image is used to recognize the outline of the image screen in the process of searching the image data.

도2는 본 발명이 적용되는 디지털 스틸 카메라의 플래시메모리에 저장된 영상 데이터를 나타내는 도면이다.2 is a view showing image data stored in a flash memory of a digital still camera to which the present invention is applied.

도3은 본 발명이 적용되는 JPEG 신호 처리 과정을 나타내는 도면이다.3 is a diagram illustrating a JPEG signal processing process to which the present invention is applied.

도4는 본 발명이 적용되는 JPEG 신호 처리 블록과 DCT 계수를 나타내는 도면이다.4 is a diagram illustrating a JPEG signal processing block and a DCT coefficient to which the present invention is applied.

도3 및 도 4를 참조하여, JPEG 신호 처리 과정을 설명한다. 210과정에서 중앙처리장치150은 비디오램160에 저장된 원화면으로부터 도4에 도시된 것과 같은 8×8크기의 블록을 읽어들인다. 220과정에서 중앙처리장치150은 상기 읽어들인 8×8크기의 블록을 이산여현변환(Discrete Cosine Transform로서 이하 DCT라고 한다)연산 처리한다. 230과정에서 중앙처리장치150은 상기 DCT연산 처리한 데이터를 양자화한다. 240과정에서 중앙처리장치150은 상기 양자화한 데이터를 허프만코딩(huffman coding)한다. 상기 과정과 같이 중앙처리장치150은 비디오램190에서 영상데이터를 읽어들여 소프트웨어적으로 JPEG 엔코딩 동작을 수행한다.3 and 4, a JPEG signal processing process will be described. In step 210, the CPU 150 reads an 8 × 8 block as shown in FIG. 4 from the original screen stored in the video RAM 160. In operation 220, the CPU 150 performs a discrete cosine transform (hereinafter, referred to as a DCT) operation on the read block of 8 × 8 size. In operation 230, the CPU 150 quantizes the DCT-processed data. In operation 240, the CPU 150 Huffman codes the quantized data. As described above, the central processing unit 150 reads image data from the video RAM 190 and performs JPEG encoding by software.

도1 내지 도4를 참조하여, 디지털 스틸 카메라에서 종래 엄지손톱 이미지 생성 과정을 설명한다. 상기 엄지손톱 이미지는 플래시메모리190에 도2에 도시된 것과 같이 원래 영상의 압축 데이터와 함께 저장된다. 종래 JPEG 신호 처리 과정에서 디코딩과정 자체에 상당한 시간이 소모되므로, 도3 및 도4에 도시된 것과 같은 JPEG 신호 처리 과정과 별도로 상기 엄지손톱 이미지는 원래 영상 데이터를 서브샘플링(sub-sampling)하는 과정을 통해 생성된다. 상기 서브 샘플링은 디지털화된 화상을 다시 샘플링하여 상기 엄지손톱 이미지와 같은 축소된 화상을 만드는 것이다. 한편, 상기 서브샘플링 과정은 원래 영상 데이터를 JPEG 신호 처리하는 과정과 별도의 신호 처리 과정을 거져야 하는 번거로움이 있다.1 to 4, a conventional thumbnail image generation process in a digital still camera will be described. The thumbnail image is stored in the flash memory 190 together with the compressed data of the original image as shown in FIG. Since the decoding process itself consumes a considerable amount of time in the conventional JPEG signal processing process, the thumbnail image is a process of sub-sampling the original image data separately from the JPEG signal processing process as shown in FIGS. 3 and 4. Is generated through The subsampling is to resample the digitized picture to produce a reduced picture such as the thumbnail image. On the other hand, the subsampling process is cumbersome to go through a separate signal processing process and the JPEG signal processing of the original image data.

따라서, 본 발명의 목적은 디지털 스틸 카메라에서 엄지손톱 이미지를 생성하는 방법을 제공함에 있다.Accordingly, an object of the present invention is to provide a method for generating a thumbnail image in a digital still camera.

본 발명의 다른 목적은 디지털 스틸 카메라로 촬상된 영상 데이터를 JPEG 압축 처리 과정에서 엄지손톱 이미지를 생성하는 방법을 제공함에 있다.Another object of the present invention is to provide a method for generating a thumbnail image of a JPEG still image data captured by a digital still camera.

이러한 목적들을 달성하기 위한 본 발명은 디지털 스틸 카메라에서 촬상된 영상 데이터를 JPEG 압축 처리하는 과정과, 상기 JPEG 압축 처리 과정에서 생성된 DC 계수를 추출하여 별도의 버퍼에 저장하는 과정과, 상기 버퍼에 저장된 상기 DC 계수를 플래시메모리의 엄지손톱 영역에 기록하여 엄지손톱 이미지를 생성하는 과정으로 구성되는 것을 특징으로 한다.The present invention for achieving the above object is a process of JPEG compression processing the image data captured by the digital still camera, extracting the DC coefficients generated in the JPEG compression process and storing in a separate buffer, and And recording the stored DC coefficients in a thumbnail area of a flash memory to generate a thumbnail image.

도 1은 본 발명이 적용되는 디지털 스틸 카메라의 블록 구성도.1 is a block diagram of a digital still camera to which the present invention is applied.

도 2는 본 발명이 적용되는 디지털 스틸 카메라의 플래시 메모리에 저장된 데이터를 나타내는 도면.2 is a diagram showing data stored in a flash memory of a digital still camera to which the present invention is applied.

도 3은 본 발명이 적용되는 JPEG 신호 처리 과정을 나타내는 블록 구성도.3 is a block diagram showing a JPEG signal processing process to which the present invention is applied.

도 4는 본 발명이 적용되는 JPEG 블록과 DCT 계수를 나타내는 도면.4 is a diagram illustrating a JPEG block and a DCT coefficient to which the present invention is applied.

도 5는 본 발명의 실시예에 따른 디지털 스틸 카메라에서 엄지손톱 이미지 생성 과정을 나타내는 도면.5 is a diagram illustrating a thumbnail image generation process in a digital still camera according to an embodiment of the present invention.

이하 본 발명의 바람직한 실시예를 첨부된 도면들을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도5는 본 발명의 실시예에 따른 엄지손톱 이미지를 생성하는 과정을 나타내는 도면으로서, JPEG 압축 처리 과정에서 생성된 DC 계수를 이용하여 엄지손톱 이미지를 생성한다.5 is a diagram illustrating a process of generating a thumbnail image according to an embodiment of the present invention, and generates a thumbnail image by using a DC coefficient generated in a JPEG compression process.

도1 내지 도5를 참조하여, 본 발명의 실시예에 따른 디지털 스틸 카메라에서 촬상된 영상 데이터로부터 엄지손톱 이미지를 생성하는 과정을 설명한다. 210과정에서 원래 화면에서 도4에 도시된 것과 같은 8×8크기의 블록을 읽어들인다. 220과정에서 상기 읽어들인 8×8크기의 블록을 DCT 처리한다. 230과정에서 상기 DCT 처리한 데이터를 양자화한다. 240과정에서 상기 양자화한 데이터를 허프만코딩한다. 상기와 같은 210과정에서 240과정은 일반적인 JPEG 압축 처리 과정을 나타낸 것이다. 한편, 본 발명의 실시예에 따른 엄지손톱 이미지 생성과정은 310과정에서 상기 DCT 처리된 데이터로부터 DC 계수를 추출한다. 320과정에서 상기 추출된 DC 계수를 버퍼에 저장하고, 버퍼 포인터를 증가시킨다. 330과정에서 전체 이미지의 모든 블록이 처리되었는지를 판단한다. 상기 전체 이미지의 모든 블록이 처리되지 않은 경우 210과정부터 되풀이하여 동작을 수행한다. 이와 달리 상기 전체 이미지의 모든 블록 처리된 경우 340과정에서 상기 버퍼에 저장된 DC 계수를 도2에 도시된 것과 같은 플래시메모리190의 엄지손톱 영역에 순차적으로 기록한다. 상기와 같은 과정을 통해 엄지손톱 이미지를 생성하면, JPEG 압축 처리 과정에서 생성되는 DC 계수를 곧바로 사용하게 되므로 엄지손톱 이미지를 생성하기 위한 별도의 서브샘플링 과정을 거치지 않으므로 처리 시간을 단축할 수 있다.1 to 5, a process of generating a thumbnail image from image data captured by a digital still camera according to an embodiment of the present invention will be described. In step 210, an 8 × 8 size block as shown in FIG. 4 is read from the original screen. In step 220, the read 8 × 8 block is DCT processed. In step 230, the DCT processed data is quantized. Huffman codes the quantized data in step 240. In step 210, step 240 denotes a general JPEG compression process. On the other hand, the thumbnail image generation process according to an embodiment of the present invention extracts the DC coefficient from the DCT processed data in step 310. In step 320, the extracted DC coefficient is stored in a buffer and the buffer pointer is increased. In step 330, it is determined whether all blocks of the entire image have been processed. If all blocks of the entire image have not been processed, the operation is repeated from step 210. In contrast, when all blocks of the entire image are processed, the DC coefficients stored in the buffer are sequentially recorded in the thumbnail region of the flash memory 190 as shown in FIG. When the thumbnail image is generated through the above process, since the DC coefficient generated during the JPEG compression process is used immediately, the processing time can be shortened because a separate subsampling process for generating the thumbnail image is not performed.

한편, 상기와 같은 JPEG 압축 처리 과정에서 생성된 DC 계수를 이용하여 상기 엄지손톱을 생성하지 않고, 블록간의 차이만을 검출한 DPCM(Different Pulse Code Modulation)으로 처리된 값을 이용하여 상기 엄지손톱을 생성할 수 있다. 상기 DPCM으로 처리된 값을 이용한 엄지손톱 생성 방법은 컴퓨터에서 다운로딩시 디코딩해주는 절차를 거쳐야 하지만, 데이터의 크기가 줄어들어 전송 시간을 줄일 수 있다.On the other hand, the thumbnail is not generated using the DC coefficient generated in the JPEG compression process as described above, but the thumbnail is generated using a value processed by a differential pulse code modulation (DPCM) that detects only a difference between blocks. can do. The thumbnail generation method using the value processed by the DPCM needs to go through a decoding process when downloading from a computer, but the data size is reduced to reduce the transmission time.

상술한 바와 같이 본 발명은 디지털 스틸 카메라에서 촬상된 화면을 JPEG 압축 처리하는 과정을 통해 간단하게 엄지손톱 이미지를 생성할 수 있는 이점이 있다.As described above, the present invention has an advantage of easily generating a thumbnail image through a process of JPEG compression of a screen captured by a digital still camera.

Claims (2)

디지털 스틸 카메라에서 엄지손톱 이미지 생성 방법에 있어서, 상기 디지털 스틸 카메라에서 촬상된 화면을 일정한 크기의 블록으로 스캐닝하여 DCT 신호 처리하는 과정과, 상기 DCT 연산 처리 과정에서 생성된 DC 계수를 추출하여 별도의 버퍼에 저장하는 과정과, 플래시메모리의 엄지손톱 영역에 상기 DC 계수를 기록하는 과정으로 구성되는 것을 특징으로 하는 디지털 스틸 카메라에서 엄지손톱 이미지 생성 방법.In the method of generating a thumbnail image in a digital still camera, a process of processing a DCT signal by scanning a screen captured by the digital still camera into a block having a predetermined size, and extracting a DC coefficient generated by the DCT operation processing And storing the DC coefficient in a thumbnail area of a flash memory. 제1항에 있어서, 상기 디지털 스틸 카메라로부터 촬상된 화면의 모든 블록이 상기 DCT 연산 처리된 경우 상기 플래시메모리의 엄지손톱 영역에 상기 DC 계수를 기록하는 것을 특징으로 하는 디지털 스틸 카메라에서 엄지손톱 이미지 생성 방법.The thumbnail image generation of the digital still camera according to claim 1, wherein the DC coefficient is recorded in the thumbnail area of the flash memory when all blocks of the screen captured by the digital still camera are subjected to the DCT operation. Way.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100567575B1 (en) * 1998-12-23 2006-06-22 삼성테크윈 주식회사 Digital Still Cameras and Their Control Methods_
KR100630983B1 (en) * 2001-02-20 2006-10-09 산요덴키가부시키가이샤 Image processing method, and image encoding apparatus and image decoding apparatus capable of employing the same
US7606432B2 (en) 2003-12-06 2009-10-20 Samsung Electronics Co., Ltd. Apparatus and method for providing thumbnail image data on a mobile terminal

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KR101142584B1 (en) 2003-11-18 2012-05-10 스칼라도 아베 Method for processing a digital image and image representation format

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100567575B1 (en) * 1998-12-23 2006-06-22 삼성테크윈 주식회사 Digital Still Cameras and Their Control Methods_
KR100630983B1 (en) * 2001-02-20 2006-10-09 산요덴키가부시키가이샤 Image processing method, and image encoding apparatus and image decoding apparatus capable of employing the same
US7606432B2 (en) 2003-12-06 2009-10-20 Samsung Electronics Co., Ltd. Apparatus and method for providing thumbnail image data on a mobile terminal

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