CODEWITHSUNDEEP
imagematlabrgb
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ffttyy

Reputation: 864

Gray image from green channel

I was reading an article and they work on the gray image from green channel. They work with retina images and detect blood vessels on it.

My questions are that:

What does 'gray image from green channel' mean?

How can I get this gray image from green channel?

What is the difference between the gray image which is result of this matlab code I = rgb2gray(RGB) and gray image from green channel?

Thank you.

Upvotes: 0

Views: 2108

Answers (1)

Mark Setchell
Mark Setchell

Reputation: 207345

Just for fun, you can do it with ImageMagick which is installed on most Linux/Unix boxes and available for free for Windows and OSX like this:

Starting with this image:

enter image description here

convert plant.jpg -separate -delete 0,2 out.jpg

That separates the image into Red, Green and Blue channels, then deletes the Red and Blue channels leaving just the Green channel which then becomes a monochromatic (grey) representation of the amount of green in each pixel - so the green of the plant shows up the brightest/lightest.

enter image description here

Upvotes: 1

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