I have an image -
I would like to get an output image that just has the highlighted red portions.
Output image -
How would I do this ?
What I am trying to do is isolate underline/strikethrough text decorations so that I can extract the text along with the text decoration information.
What I had in mind -
- Remove all pixels (convert to white) that are not connected to a red pixel (connected to red pixel via some other non-white pixel also counts). I tried using connected components but it seems I need to pass in a binary image and this approach failed.
- Using a sliding window to iterate through the pixels and if the sliding window has a red pixel, don't do anything, if it doesn't, turn all the pixel within the window - white. The sliding window size will be adjusted based on trial and error.