Study And Implementation Of Digital Photo Intelligent Processing Base Of Surroundings Sampling

Certificate is very important for one person, and a photo of the person is necessary in certificate usually. With the development of the hardware and software, digital photo of all colors is used in certificates, for instance The Second ID Card of china, in which all colors photo is used. On the other hand, the software of image processing like PhotoShop\CoreDraw became a fashion. The digital photo of certificate can be processed by use these software, but the specialized skill and the ability of control the specification are necessary both to do the job. As these factors above, there are some difficulties in process the photo of certificates.The image enhancement and restitute based of surroundings sampling is one of innovations of the paper. The photo processing of certificate have the particularity, one the one hand, we must adjust brightness and contrast to improve comprehensibility of the photo, one the other hand we must keep the colors like skin to improve the fidelity. The paper analyses the shortage of Lighting Compensation method advanced by Anil KJain, bring a kind of method about color emendation base on Surroundings Sampling Chart and a model of complexion base on YCb'Cr' color space which changed from YCbCr by nonlinear color transformation. Besides, paper gives a perfect design of Surroundings Sampling Chart.Delete the background of the photo belong the category of image partition. As the portrait is a continuous block, the paper gives a new method by use "mask" chart. Adjust contrast within measure can improve the third dimension of photo, but there are "blaze" when the photo is printed and baked. To solve the question, the paper give a model based of Bezier Curve to extend the hue, and realized the arithmetic.Real time inspect is necessary to improve practicability of intelligent processing system. To improve robust of digital photo inspect, the paper give a filtration method base on density of pixel. Base on complexion model, the paper give an integrated means by demarcating the eyes firstly. The method of face width measure is another innovation of the paper.Integrating with the development of The System of The Second ID Card Photo Intelligent Processing, the paper analyses and designs the whole structure of the system. Dependability and practicability are emphases of the system, and especially some technology involved is discussed deeply.