how to change image bit depth in matlab

To change the bit depth of an image in MATLAB, you can use the imread function to read in the image, and then the imwrite function to write out the image with a different bit depth.

For example, to read in an image with 8 bits per pixel (i.e. grayscale), and write out a copy with 16 bits per pixel, you could use the following code:

main.m
% Read in the image
img = imread('my_image.png');

% Convert to 16-bit depth
img16 = uint16(img);

% Write out the image
imwrite(img16, 'my_image_16bit.png');
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This code first reads in the original image using imread. It then converts the pixel values to 16-bit depth using the uint16 function. Finally, it writes out the new image using imwrite, with the file name my_image_16bit.png.

Note that the imwrite function supports a wide range of output formats and bit depths, which you can specify using additional arguments to the function.