Image Contrast Enhancement for Smart Cameras in Wireless / Mobile Video Applications

The problem of improving the efficiency of image pre-processing in mobile and wireless-based applications is dealt with in this article. The task of increasing the contrast for complex low-contrast images with small-sized objects, a wide dynamic range and uneven illumination is being solved. A new technique for image contrast enhancement is proposed based on the linear piecewise stretching of image dynamic range in the automatic mode with minimal level of computational cost. Proposed technique is based on piecewise linear contrast stretching using multilevel moment-preserving thresholding. The proposed method enables to increase the overall contrast of the complex images and can be recommended for use in wireless / mobile applications.