So my take is that if you just want to convert to grayscale using some default implementation, use IrfanView, but if you need more flexibility, options, and perhaps want to compose different batch processing actions together, use more professional tool like the one I mentioned. A nil value is returned for other non-standard bitmap types. For 64-bit RGBA images, conversion is done by dividing each 16-bit channel by 256. of course you shuold change the file name. just open the code in matlab, then put your picture into the path where the code is. If the color image uses the CMYK color space, A is an m-by-n-by-4 array. And if you need, it has a host of other image processing functions like brightness, contrast, etc. For 48-bit RGB images, conversion is done by dividing each 16-bit channel by 256 and by setting the alpha channel to an opaque value (0xFF). dou2abou If you use Matlab, You need not to complile the code. Convert between the image types, such as RGB (truecolor), binary, grayscale, and indexed images, and change the data type of an image. It is commercial, but allows one to specify how much Red, Green, and Blue contribute, as well as allows one to use Lightness or Intensity "channels" of other color models like HSL and HSI to achieve conversion: Batch Image Processor In addition it has various options for saving grayscale images: 8-Bit Bitmap, 8-Bit PNG, 8-Bit GIF, and some others. Share Improve this answer Follow answered at 9:41 Ander Biguri 34. However, for those who might want to specify exactly how the colors are to be converted to grayscale I thought I will mention the program I use. Convert your image to another type to use bmp (or use png) imwrite (im2single (newimage), 'newimage.bmp') or imwrite (im2double (newimage), 'newimage.bmp') or imwrite (im2uint8 (newimage), 'newimage.bmp') Depending on your data and desired precission. If you just want to convert to grayscale using default conversion method, IrfanView does the job. from PIL import Image threshold 10 convert image to a list of pixels img Image.open ('letter.jpg') pixels list (img. ![]() imwrite (A, 'newImage.jpg', 'Comment', 'My JPEG file') View information about the new file. Add a comment to the file using the Comment name-value argument. imwrite automatically chooses this format when you use the. ![]() Even though there is an accepted answer, thought I would give my 2 cents. A rand (49,49,3) Write the image data to a JPEG file. using below code am getting only black white image with no ease help.imean is the average of image obtained using mean() function in matlab.
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