how to retrive color of resulting image as original?

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jagannath mishra
jagannath mishra 2013-5-14
sir ,i have an RGB image.then i convert it to gray and then perform actions like filtering and i got an result.so now the image which i got is a gray image and different from the original one also (in color). Now my question is "is there any method or code by which i can make the resulting image colors like the original one accurately ? ".

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David Sanchez
David Sanchez 2013-5-14
Once you transform an image to grayscale, it looses many information: a colour image is a 3D matrix, while a grayscale one is 2D. It is a good practice to create a working image and always save the original one in case you has need of it in the future.

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