该系统的主要功能包括：①能够读取、保存不常见格式的图像；②直方图均衡化处理；③添加噪声和均值降噪；④图像阈值化。⑤频域增强，产生模糊、锐化等一些效果-The system s main features include: ① the ability to read, save the image format is not common　② histogram equalization processing　③ mean added noise and noise reduction　④ image thresholding. ⑤ frequency enhancement, blurring, sharpening and some other effects