Compression of earth observation satellite images

摘要

A method of acquiring, compressing and transmitting satellite images, characterized in that in a systematic manner: an image is acquired (101); (102) the image is processed by an image preprocessing step providing a value characteristic of the image and an image preprocessed by recognizing predetermined natural objects in the acquired image and replacing the natural objects by standard objects; the characteristic value is compared (103) with a table of values, each value of which is associated with a compression algorithm; the compression algorithm corresponding to the characteristic value is implemented (104) by compression elements for compressing the image; the compressed image is transmitted (105) to a remote image reception device by transmission elements.

主权项

1. A method for acquisition, processing, compression and transmission of Earth observation satellite images, comprising:
acquiring an image, named acquired image, by an instrument carried by a satellite, processing said acquired image by an image preprocessing step adapted to provide a preprocessed image and at least one numerical value, referred to as the characteristic value of said acquired image, representative of a content of said image, said preprocessing step comprising a step of recognizing predetermined natural objects in said acquired image and a subsequent step of substituting standardized objects for said natural objects, comparing said characteristic value with a table of values, each value of which is associated with a compression algorithm, employing said compression algorithm corresponding to said characteristic value in order to compress said preprocessed image to provide a compressed image, and transmitting said compressed image to a remote image reception device.