在DSP上实现灰度拉伸，使用的是最简单的分段线性变换函数，提高了图像处理时灰度级的动态范围。-In the DSP to achieve gray stretch, using the simplest piecewise linear transformation function, improved image processing gray-level dynamic range.

结合实例学习如何在视频显示程序中增加图像处理算法。理解和掌握灰度拉伸的原理和应用-With examples to learn how to increase the image processing algorithms in the video display program. Understand and master the principles and applications of gray stretch