能实现灰度图像中数字的识别：包括256转灰度图像，二值化，梯度锐化，去离散噪声，整体倾斜调整，字符分割，尺寸标准归一化，紧缩重排，神经网络识别等。-To achieve the number of gray-scale image recognition: includes 256 to gray image, binary, gradient sharpening to discrete noise, the overall tilt adjustment, character segment