How to convert multiple binary images to grayscale and save them into a folder ?

Hello , I have a folder contating around 4000 binary images which I wanted to use them as training samples for AlexNet . As you know AlexNet and most deep networks accept only grayscale or RGB images. Is there an efficent way to convert these multiple images to grayscale or RGB without using for loop. e.g. by using image datatstore function. please help :)

Answer 1

[Walter Roberson]

create your imagedatastore based on the binary images. Now use transform() to create a new datastore with a transformation function @im2uint8 or @im2double or @(M)repmat(im2uint8(M), 1,1,3)

[Moe O.]

thank , i tried this but i get error. can you please write the code :) thank you.

[Moe O.]

imds=imageDatastore('loctation');

transform(imds,@(imds)repmat(im2unit8(imds), 1,1,3)) % to make it RGB

transform(imds,@im2uint8) %to make it Grayscale

is that correct

[Walter Roberson]

im2uint8 not im2unit8

Also you need to assign the result of transform to a variable, and use that variable as the datastore to pass around

[Moe O.]

Ok thank you :D , I will give it a try now.