How to create html using Tesseract hocr in iOS?

[Arnold Bailey]

I have a working iOS code using tesseract. I would like to create html using the hocr config option. I cannot find an example of how to generate html programmatically. Is there any sample code/tutorial around? I'm using Xcode 5 and the latest Tesseract-ios.

- (NSString *)OCRPage:(NSString )imagePath { //NSLog(@"imagePath: %@", imagePath); Tesseract tesseract = [[Tesseract alloc] initWithDataPath:@"tessdata" language:@"eng"]; [tesseract setImage:[UIImage imageNamed:imagePath]]; [tesseract recognize];

//NSLog(@"%@", [tesseract recognizedText]);
NSString *textData=[tesseract recognizedText];

UIAccessibilityPostNotification(UIAccessibilityAnnouncementNotification, [tesseract recognizedText]);
return textData;

}

Also, the use of the config file is unclear. I don't have a configs directory off of the tesseractdata path.

[Arnold Bailey]

Ping …. Does anyone know if hocr output can be generated with the iOS version?

[zdenko podobny]

I am not iOS user ;-) If you use some tool/wrapper/code you should ask its author(s) first :-).

You do not provide a lot of relevant information (e.g. what version of tesseract you are using, if you are just wrapping tesseract executable etc...) IMO there is nothing platform specific regarding hocr output: if you are able to use tesseract API, you can use API function GetHOCRText[1]. If you are using tesseract executable, you need to (create&)use hocr config file[2].

[1] https://code.google.com/p/tesseract-ocr/source/browse/trunk/api/baseapi.h?r=891#560

[2] https://code.google.com/p/tesseract-ocr/source/browse/trunk/tessdata/configs/hocr?r=891

Zdenko

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[Arnold Bailey]

Thanks for the reply. I believe that I need to contact the wrapper developer Lois Di Qual. It is using the tesseract 3.0.2 release. My interpretation is that the appears that the wraper does not use a configs file. The wrapper has a setVariableValue method that I coded as follows:

    [tesseract setVariableValue:@"TRUE" forKey:@"tessedit_create_hocr"];

It doesn't generate the html output. 

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