将JPEG图像转换为黑白图像

Question

Is there any specific way to convert jpeg images to black and white using C? I converted a .bmp image to black and white using C by simply extracting the headers (which in .bmp file is 54 bytes in length) and converting the RGB to the respective gray level using the formula. But how to do that in jpeg file?

Answer 1

如果你有能力链接库，我强烈推荐OpenCV来完成这项任务： http ： //opencv.willowgarage.com/