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.

dspDM642，进行灰度图的线性变换，实时输入并显示出来-DspDM642, gray linear transformation, real-time input and display

基于DSP开发的DM642实现的灰度图的线性变换完整程序-DSP based on the development of the DM642 implementation of the gray scale linear transformation of the complete program