Sorry this never got a response before now. The problem is not one of contrast. The problem is that the dot in the text is just too small to be considered by the OCR. It appears to be a single pixel. If you do a readText on the field, the value returned is “derp@email org” with a space instead of a dot. Plugging that into a text search, the text can be found with
moveTo(text:"derp@email org", searchRectangle:(1070,789,1260,844))
There’s no way to tell the OCR that it shouldn’t ignore that single pixel. It’s probably being treated as noise. There are heuristics used to determine what is and isn’t text, and my guess would be that a single pixel doesn’t match with the stroke or other characteristics of the font. My guess would be that if it were 2 pixels, it would get read. It actually seems too small to me as a user; I was reading it with a dot because I expected one to be there, but when I really looked at it, I could barely make it out.