Image processing device, still image photographic deivce and image processing method

Abstract

Output signals of a predetermined number of pixels composed of a plurality of color components intermixed are rearranged into a set of unit blocks, each composed of output signal components of the same color, then the thus rearranged image signals are encoded into fixed-length codes for each unit block, then the image signals thus encoded into fixed-length codes are stored in a coded image memory, then the image signals stored therein are read out and decoded into fixed-length form for each unit block, and the decoded image signals are reversely rearranged to restore the original signals, which are stored in a frame memory.

Description

technical field [0001] The present invention relates to an image processing device, a still image camera device and an image processing method for encoding and compressing an output signal of a specified number of pixels mixed and outputted by various color components and storing it in a memory. Background technique [0002] Hitherto, a still image pickup device has been used which is provided with three-color filters of red (hereinafter referred to as R), green (hereinafter referred to as G), and blue (hereinafter referred to as B) on a single-chip or single-tube type imaging device. The device can obtain 3-color image signals. In such a still image pickup device, in order to obtain three-color image signals for each pixel, pixel interpolation processing is performed using signals of adjacent pixels. When performing pixel interpolation processing, the method of processing data as a digital signal is easy to handle, but if the image signal is directly digitized, the amount ...

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Problems solved by technology

[0006] Since the existing still image imaging device is configured as above, it is necessary to directly read image signals from the imaging element for each color, and there is a problem that it is necessary to prepare an imaging element dedicated to reading each color and dedicated hardware for this purpose.

[0007] In addition, although it is enough to use one system for the encoding circuit, it can be simplified, but it is necessary to store all the color signal components of one frame in the encoding memory, and there is a problem that a large-capacity memory is required.

[0008] In addition, in the case of using an image processing device to form a still image imaging device, since the data capacity that can be stored in the coded memory is limited, a large amount of data cannot be processed continuously, and there is a problem that high-speed continuous shooting cannot be performed.

[0009] In addition, also in the case of using an image processing device to constitute a still image imaging device, since the area of ​​one pixel of an imaging device using a CCD (charge-coupled device) or the like can be reduced to a limited extent, there is a problem that it cannot be obtained. The issue of high-definition reproduced images

[0010] In addition, in the case of configuring a still image pickup device using an image processing device, since it takes a predetermined amount of time to encode and decode the image signal, it takes a certain amount of time to display the pickup screen anyway. subject

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