There are three basic gray level transformation.
- Power – law
I am assuming a Linear Gray Level Transform is somehow related to the Identity line from the graph.
Identity transition is shown by a straight line. In this transition, each value of the input image is directly mapped to each other value of output image. That results in the same input image and output image. And hence is called identity transformation.
From this statement I understand that in order to convert a colored image to a gray scale one (which I think Linear Gray Level Transform should do - converting to gray scale) I have to take each value of the input image and make a function that does a kind of conversion for each value.
I surfed the internet, but didn't managed to find a Linear Gray Level Transform example.
My question is if this is the right way (some kind of a small algorithm, if these are the steps) for a Linear Gray Level Transformation or if there is an example of images or an explanation of how does this Linear Gray Level Transform works.