matlab怎样看图像是彩色还是灰度

matlab怎样看图像是彩色还是灰度

看这幅图像的维数就可以啊，如果是二维矩阵，那肯定是灰度图像。不过有个函数isgray可以判断（isbw判断是否二值图）

rgb2gray convert an rgb image or colormap to grayscale 转换rgb图像或颜色映像表为灰度图像. syntax: i = rgb2gray(rgb) newmap = rgb2gray(map) description: rgb2gray converts rgb images to grayscale by eliminating the hue and saturation information while retaining the luminance. i = rgb2gray(rgb) converts the true-color image rgb to the grayscale intensity image i. newmap = rgb2gray(map) returns a grayscale colormap equivalent to map. 详细请查阅 matlab中关于rgb2gray的help。