Question

How can I write a 1-bit bmp image in Matlab using imwrite or any other function. the default of imwrite for bmp is 8-bit.

Thanks a lot 🙂

Answer 1

According to the IMWRITE documentation:

If the input array is of class
logical, imwrite assumes the data is a
binary image and writes it to the file
with a bit depth of 1, if the format
allows it. BMP, PNG, or TIFF formats
accept binary images as input arrays.

Therefore, if you convert your image data to a logical matrix before giving it to IMWRITE, you should be able to create a 1-bit BMP image:

imwrite(logical(imageData),'image.bmp');