This paper uses opening and closing operations based on multi-scale contour structuring elements to remove noise,and grade image is obtained by the smallest size contour structuring.

This paper proposes a simple and rapid number recognition algorithm based on exterior contour structure characteristics of a digit validation image.

Algorithm of image edge examination based on morphology multi-structural element;

Choosing appropriate structural elements to do morphologic operation on the fabric image can obtain weft and warp segmentation images ; then fabric density can be gained by analyzing weft and warp segmentation images.

The detection results of image edges are different morphologically for multi-scale structural elements.

The paper reveals that the performance of morphological filters is based on reasonably chosen structuring elements,and presents the influence of the structuring element s size on the proposed enhancement method.

As the experiment has showed,by using the sorts of operators combined by the basic operation of Mathematics Morphologic Subject and the top-bottom hat transform and the subtract operators,choosing the right structuring element,the image segmentation after pre-processing operations,the subject water which gray change smally can be extracted from the remote sensing ima.

In the light of traits of digital speech signal and properties of morphological filter, a new morphology filter with suitable structuring element, is proposed, which is designed to apply to getting accurate pitch contrail of speech or mandarin.