Through the study of deinterleaving algorithms of AOA and PRI of radar pulse,based on radar threat library,a new quick speed recognition and deinterleaving algorithm for stagger PRI mode and jitter sequence using variable difference histogram is proposed in this paper.

On one hand,this paper compares the spatial analysis method in the landscape ecology with the latest histo-variogram method which was presented by Zhang Hao,et al in 2002 and then analyzes their advantages and shortcomings.

A new method for spatial matching of data with different resolution was proposed by introducing the concept of standing and contour pixels in histo-variogram theory, and was examined in quality validation using the sea surface temperature data obtained by FY2-C satellite.

Seeing that most of the traditional automatic video classification algorithms are complex and always waste lots of time,we proposed a simple video classification approach of histogram difference statistical method.

And a steganalysis technique based on spectrum analysis of difference histogram of frequency coefficients,which is universal in image?s frequency domain,such as DFT,DCT or DWT domain is researched.

Based on the statistical observations on the difference histogram of images, a new steganalytic technique capable of a reliable detection of the spatial LSB (least significant bit) steganography is proposed.