Patent ID: 8515189
Filing Date: 2013-08-20
Classification: H04N

Abstract:
1. An image compression method with a constant compression ratio, for raw data compression of an image generated by a multi-field sensor into an image bit stream with a compression ratio, wherein the image comprises a plurality of lines, the multi-field sensor outputs the lines according to a field order, and each line corresponds to a field index, the method comprising: segmenting the image into a plurality of image bands, wherein each image band comprises at least one line; allocating storage space in a memory according to the compression ratio and a bit stream length of the raw data; segmenting the storage space into a plurality of compressed band regions according to the compression ratio and the bit stream length of the raw data, wherein the compressed band regions correspond to the image bands respectively; recording a starting position of each compressed band region as a current ending position; sequentially receiving the lines; compressing the lines into a plurality of compressed bit streams respectively; and sequentially writing the compressed bit streams into the corresponding compressed band regions through a write procedure according to the field indexes of the lines, the field order output by the multi-field sensor, and a group formed by the image bands corresponding to the lines.