Evaluate the quality of satellite image depending on the correlation

The study of satellite image is one of the important subject in image processing and especially in the developer of communication, therefore, we introduce minimum correlation method to evaluate the quality of satellite image, so we test our method in three satellite channel Arabsat, Nilesat and Hotbird, this study depend on the automatic search for minimum correlation of (40times40) sliding box for three channels, this way give us obvious result to distinguish between the quality of any channel, and the result is the Hotbird the better from the others.