Study And Process Of The Expiratory Phase X-ray Image And CHD X-ray Image

The identification of the expiratory phase X-ray image and CHD X-ray image is important to the Auto-diagnosis system. Seperate the lung from X-ray image to study by thresholding segmentation, edge detection, tracking bug and so on, because it is clear that the mean gray scale of the lung in the expiratory phase X-ray image is higher than in the normal image. And the mean gray level of the lung is regarded as the eigenvalue to identify the image, but it doesn't work well. In view of the dosage of the X-ray exposure and the difference between persons, a new method that the ratio of the gray scale in the lung and the gray scale in the bones as the eigenvalue is brought forward to identify the image. And the two method are compared by using the distance between classes. The result shows that the second method is the more effective. In order to get the probability of the image which is belonging to expiratory phase image, the menthod of fuzzy pattern discernment was established. Such as expiratory phase X-ray image ,the methond is being used to study on the identification of the CHDX-ray image. The result shows the menthod works well.