Patent ID: 9367755
Filing Date: 2016-06-14
CPC Classification: G06K,H04N

Claim Text:
1. An image processing apparatus comprising: circuitry configured to perform preprocessing on an image so that a luminance range of the image in which sensitivity is low is compressed, wherein said preprocessing includes logarithmic conversion on an image to be encoded; quantize the preprocessed image by performing first quantization on image data of a first luminance region of the preprocessed image and performing second quantization on image data of a second luminance region of the preprocessed image, wherein a quantization error of the first quantization is less than a quantization error of the second quantization and, wherein the quantization error of the first quantization is focused on the first luminance region in which expansion of an error due to inverse-conversion processing including logarithmic inverse-conversion is relatively small or no expansion occurs; and encode the quantized image.