Image processing method and image processing apparatus
A technology of image processing and image data, which is applied in the direction of image communication, TV, color TV parts, etc., can solve the problems of image processing efficiency reduction, column direction width limitation, and inability to improve the overall processing efficiency of image processing, etc.
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no. 1 Embodiment approach
[0035] figure 1 It is a block diagram when the image processing device of the first embodiment is applied to, for example, a digital camera. figure 1 The digital camera shown is composed of the following parts: imaging element 1; preprocessing section 2; bus 3; memory controller 4; frame memory 5; input DMA 6; image processing section 7; buffer 8; JPEG compression section 9; output DMA 10; input DMA 11; JPEG decompression / compression section 12; output DMA 13; card interface (I / F) 14;
[0036] exist figure 1 Among them, an imaging signal obtained by an imaging element 1 composed of a CCD or the like is input to a preprocessing section 2 . In the preprocessing unit 2 , analog processing such as amplification of the input imaging signal and preprocessing such as digital conversion processing of the imaging signal are performed. And, the image data (RGB BAYER data of one frame) obtained in the preprocessing unit 2 is written into the frame memory 5 constituted by SDRAM or the ...
no. 2 Embodiment approach
[0055] Next, a second embodiment of the present invention will be described. The second embodiment is another example of rearranging JPEG compressed data. Additionally, structures with figure 1 The same as explained in , so the explanation is omitted.
[0056] Next, the same parts as those of the first embodiment will be briefly described. The imaging signal input from the imaging element 1 is converted into digital data by the preprocessing unit 2 and written into the frame memory 5 via the bus 3 and the memory controller 4 . Image data written in the frame memory 5 is read by the image processing unit 7 for each block line described in the first embodiment, and image processing is performed. Such as Figure 9 As shown in (a), the data processed in the image processing unit 7 is written into the buffer memory 8 for each block, as Figure 9 As shown in (b), it is input to the JPEG compression unit 9 for each block. In the JPEG compression unit 9, the JPEG compression pro...
no. 3 Embodiment approach
[0063] Next, a third embodiment of the present invention will be described. Figure 14 It is a block diagram when the image processing device according to the third embodiment of the present invention is applied to, for example, a digital camera. Figure 14 and figure 1 The difference is that instead of the JPEG decompression / compression unit 12, a JPEG decompression unit 21, a cache 23 and a JPEG compression unit 24 are provided.
[0064] Next, the same parts as those of the first and second embodiments will be briefly described. The imaging signal input from the imaging element 1 is converted into digital data by the preprocessing unit 2 and written into the frame memory 5 via the bus 3 and the memory controller 4 . Image data written in the frame memory 5 is read out by the image processing unit 7 for each block row, and image processing is performed. Such as Figure 15 As shown in (a), for each block row, the data processed in the image processing unit 7 is written int...
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