PICTURE ENCODER, PICTURE DECODER, PICTURE ENCODING METHOD, PICTURE DECODING METHOD, AND MEDIUM

摘要

A picture encoder which is provided with a dynamic range estimating means (10101) which obtains a dynamic range from a multi-pixel picture to be encoded, a dynamic range encoding means (10105) which encodes the dynamic range and outputs the range as encoded dynamic range data, a smoothing function estimating means (10102) which estimates a smoothing function from the multi-pixel picture, a multi/binary pixel converting means (10103) which converts the multi-pixel picture into a binary picture based on the multi/binary pixel converting standard corresponding to the smoothing function, a binary picture encoding means (10104) which encodes the binary picture and outputs the picture as encoded binary picture data, and a smoothing function encoding means (10106) which encodes the smoothing function and outputs the function as encoded smoothing function data. Therefore, the multi-pixel picture can be encoded efficiently.