Stretches contrast on the image and normalize image from 0 to 1 The main difference of this function to the standard streching functions is that standard function finds global minimum and maximum on the image, then uses some low and high

中控指纹读取对比系统vc开发，net下调试成功。-In the control fingerprint reading VC development contrast system, net debugging success.

中控指纹读取对比系统，Delphi开发，Win7下调试成功。-In the control fingerprint reading contrast system, Delphi development, Win7 debugging success.