this paper proposes a new method for formulating and evaluating illegal points and three new kinds of evaluation functions,and develops a special hybrid genetic algorithm(HGA) with penalty function and weighted gradient direction search for non linear programming problems.

During the measurement step,the color information and texture information were represented by color histograms and gradient orientation vector respectively.

The gradient orientation angle is a relative stable feature in the condition of illumination fluctuations and object rotation.

In order to adequately use all kinds of remote sensing image information, some important image fusion techniques, analysis features and disadvantages of these methods are summarized, a novel hierarchical fusion technique for remote sensing image is presented based on local deviation of the direction gradient.

Utilizing technology such as continuation,direction gradient and two derivatives methods etc to recognize the rift construction,exerting digital image processing technology to realize in terms of the VC++6.

Considering obvious directionality and color stability of text strokes,a rough text location is proceeded according algorithm of orientation gradient.

Then it constructs 8 templets of orientation gradient for each doubtful noise,makes the sure of the noises sets according to the magnitude of 8 values of orientation gradient.