I checked again.. Mine wasn't 100% accurate too.. I tried changing BS resolution but I find 860x720 more accurate for tesseract. Also, I tried running read value twice per search and got different results. I think we could run read value 2-4x then choose the minimum value and/or greater number of occurence. atleast the accuracy will be around 95% if not 100% I think. And if you match it with image search I think It'll be ok.