Question

I am new to programming in general and have recently gotten into App development. I am using tesseract for iOS and I can’t seem to figure out how to get it only read numbers.

There is an exact question posted by Alex G Here and I have the same files/problem as him. the answer apparently is

Go to the tessdata\configs\digits file. If you’re using the API, then
call SetVariable(“tessedit_char_whitelist”, “0123456789-.”); You use
the SetVariable API if you want to programmatically call Tesseract,
via Objective-C, for instance.

Except I still do not understand how to do this. Where is this command line? I am calling Tesseract from Xcode and not a command line. I also do not contain this tessdata\configs\digits file.

If somebody could please help me I would really appreciate it.

Thanks!

Ted

Answer 1

If you follow the How To: Compile and Use Tesseract (3.01) on iOS (SDK 5) article, you would place the SetVariable statement after the Init call, as follows:

tesseract->Init([dataPath cStringUsingEncoding:NSUTF8StringEncoding], "eng");
tesseract->SetVariable("tessedit_char_whitelist", "0123456789-.");