An Enhancement Method for Mine Underground Video Image Based on Curve Fitting
The images of underground monitoring system have the disadvantages of low contrast and poor details; this paper sets forth a contrast enhancement method based on curve fitting used by cubic spline interpolation. For different environments in the underground mine, the matched curve adapted to the environment is selected as a template, and nonlinear transformation is made for video image. In this case, the proposed method can effectively improve the image contrast, and stand out the image details.