I have constructed pdf files that contain rows of ones and zeros and spaces nothing else. The font is a single old IBM font. The PDF files were created from scanned 60 year old IBM engineering documents produced on IBM 60s era high speed printers. Files containing say up to 10 rows of ones and zeros and spaces do pretty well. But when the number of rows inceases to around 40 the results are all over the map and unworkable.
asked 23 Jan '15, 23:05