Hi Naveed
When I first saw your title "How to judge a picture if its edited in any tool or original", my immediate response was: "depending whether it fulfills its purpose or not" since I thought you were asking a question in photography in general. Having read your responses in the discussion, my answer has not changed, but it has become specific to the competition. Every competition has rules and regulations that all must follow. What were the rules and regulations that you asked the contestants to adhere to?
1. No digital editing? Then any photo which was even the slightest editing - including colour adjustment etc etc out they go!
2. Minor adjustments, such as color adjustment etc etc.. then only accept that kind of photos, come up with the winers list and ask to see (and examine) the original shot. Do this BEFORE you announce the winners
3. Reasonable adjustments but that do not alter the context of the photo, same verification as 2 but with a bit more lead-way for the contestants and a bit more head-ache for the judges (as the definition of altering the content of the photo may vary from judge to judge, let alone contestant to contestant).
4. Any amount of editing?
My 2 cents, hope they help
-- marios