Find text in a bitmap

Question

I need to determine if a rowset is displayed in an image set.

This is a simplified version of OCR with these simplifications:

• Font family and font size fixed
• Images are raster images (gif, png).
• No smoothing
• I only need a true / false result , not necessarily a position index.

The main challenges are performance. I need to check hundreds of terms across thousands of images.

I need pointers to an algorithm, languages, ...

Thank.