How to remove everything that is grey (127, 127, 127) from an image?

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Oliver Lestrange 2020-12-29

评论： Walter Roberson 2020-12-29

Hi,

I want to remove everything with the rgb color (127, 127, 127) from an image. I am using

externalMask = planta.img(:,:,1)==127 & planta.img(:,:,2)==127 &...
        planta.img(:,:,3)==127

to know where the grey pixels are.

I want to show the image and that the grey parts doesn't appear.

How can I do that?

Thanks in advance!

PS: I am using R2016a version.

Walter Roberson 2020-12-29

编辑：Walter Roberson 2020-12-29

mask = all(planta.img == 127, 3);
image(planta.img, 'AlphaData', 1-mask)

Image Analyst 2020-12-29

Need double equals:

mask = all(planta.img == 127, 3);

Walter Roberson 2020-12-29

Good point

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