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.

汽车仪表的分段线性插值函数程序，带断电处理函数，非常实用。-Piecewise linear interpolation function of automobile instrument, with power function, very useful.