First, scanned the target without colors it got recognized. Once we color the targets it did not get recognized.
So we then bolded/ thickened the edges of the original targets (uncolored). Started coloring with light colors now it got recognized.
Tested with a target colored with pencils / crayons/ markers. If use bright colors like black, blue etc... the target could not be recognized.
Is that the color that affets the feature points?
I have attached the targets. The elephant colored with dark colors did not recognize, whereas the panda colored with light colors worked.
Please clarify me on this. Whats the difference when color the targets with light / dark colors.