Study On Dodging Of Aerial Digital Image Based On Color Model Transform

Dodging is the key step of image analysis and processing. Because of the effect of time, illumination and other factors, the difference of color or luminance in aerial digital image exists. The difference will further affect the DOM, digital city, construction of digital province database and other project of image. So removing the difference of color or luminance, that is dodging, becomes a basic question of remote sensing application.Dodging model of different color model is proposed. Comparing the result of different color model, a color model that is fit for dodging is vertified. The main contents are shown as following.1. The reason of uneven illumination and the development case of home and abroad is briefly introduced.2. The basic principle and implemented method of dodging are analyzed and summarized systematically, and a dodging method on basis of histogram matching is proposed.3. Some color model of image processing in remote sensing are introduced, and the transform formula between the RGB color model and other color model is briefly introduced.4. Regarding the result of dodging on basis of this some color model, the result access standard is introduced.5. Comparing the result of dodging on basis of some color models, this paper concludes that the dodging method in RGB color model , histogram matching according to different bands ,is an effective method that spectral information are retained and at the same time the difference of the color or illumination are removed .