Imwrite within a function

I know there is a simple answer to this but I can't find it and I am on a tight deadline.

I am writing a function where I input an image, modify it, and then save it with a very similar name using imwrite.

For example, I want to put the image 'IA2.bmp' through my MaskFilter function.

img = imread(image);

rgbImage = img;

redBand = rgbImage(:,:, 1);

greenBand = rgbImage(:,:, 2);

blueBand = rgbImage(:,:, 3);

redthreshold = 25;

greenThreshold = 20;

blueThreshold = 25;

redMask = (redBand > redthreshold);

greenMask = (greenBand > greenThreshold);

blueMask =1- (blueBand < blueThreshold);

redObjectsMask = uint8(redMask & blueMask);

maskedrgbImage = uint8(zeros(size(redObjectsMask)));

maskedrgbImage(:,:,1) = rgbImage(:,:,1) .* redObjectsMask;

maskedrgbImage(:,:,2) = rgbImage(:,:,2);

maskedrgbImage(:,:,3) = rgbImage(:,:,3) .* redObjectsMask;

Now I want to save my modified image as 'IA2_MaskFiltered.tiff' (I have added the _MaskFiltered and changed it from a BMP to a Tiff).

I have tried numerous variations of imwrite but I can't get it to save as the modified name. Any suggestions?

Thanks for your help.

Answer 1

[Image Analyst]

For some reason you initialized maskedrgbImage to a single color channel. Not sure if that would cause a problem, or even what problem you observed (but didn't share) but I think this untested code should work:

maskedrgbImage = zeros(size(rgbImage), 'uint8');
maskedrgbImage(:,:,1) = rgbImage(:,:,1) .* redObjectsMask;
maskedrgbImage(:,:,2) = rgbImage(:,:,2);
maskedrgbImage(:,:,3) = rgbImage(:,:,3) .* redObjectsMask;
baseFileName = 'IA2_MaskFiltered.tiff';
yourFolder = 'D:\'; % or whatever...
fullFileName = fullfile(yourFolder, baseFileName);
imwrite(maskedrgbImage, fullFileName);

Make sure that maskedrgbImage is still a uint8 or uint16 image when you call imwrite().

Answer 2

[Nitin]

one of the many solutions:

temp = image.name(1:3); new_name = [temp,'_MaskFiltered.tiff'];

imwrite(modified_image,new_name);