Patent ID: 8233060
Filing Date: 2012-07-31
Classification: H04N

Abstract:
1. An image data processing apparatus which compresses original image data captured by an imaging device, comprising: means for obtaining signals of same color components of color filters; first compressing means for performing a first compressing process of compressing L bits to M (<L) bits for each pixel of image data separated into the same color components; second compressing means, connected to the first compressing means in series, for performing a second compressing process, which is different from the first compressing process in characteristics of distortion which occurs, of compressing M bits to N (<M) bits for each pixel, the second compressing means including a quantizing/dequantizing unit which simultaneously performs a quantizing process and a dequantizing process within a feedback loop; an image memory for storing data compressed by the second compressing means; second decompressing means for performing a second decompressing process, which is a reverse process of the second compressing process, of decompressing N bits to M bits for each pixel of data stored in the image memory, the second decompressing means including a dequantizing unit having a dequantizing characteristic that is the same as a dequantizing characteristic of the quantizing/dequantizing unit; first decompressing means, connected to the second decompressing means in series, for performing a first decompressing process, which is a reverse process of the first compressing process, of decompressing M bits to L bits for each pixel of output data of the second decompressing means; and signal processing means for performing a signal process including gamma correction for image data which are output from the first decompressing means, the feedback loop including a predicting unit that is shared by the second compressing means and the second decompressing means.