Tesseract initialization

gistfile1.m

-(void) startTesseract {
	//Adapted from http://robertcarlsen.net/2009/12/06/ocr-on-iphone-demo-1043
  
	NSString *dataPath = [[self applicationDocumentsDirectory] stringByAppendingPathComponent:@"tessdata"];
	/*
	 Set up the data in the docs dir
	 want to copy the data to the documents folder if it doesn't already exist
	 */
	NSFileManager *fileManager = [NSFileManager defaultManager];
	// If the expected store doesn't exist, copy the default store.
	if (![fileManager fileExistsAtPath:dataPath]) {
		// get the path to the app bundle (with the tessdata dir)
		NSString *bundlePath = [[NSBundle mainBundle] bundlePath];
		NSString *tessdataPath = [bundlePath stringByAppendingPathComponent:@"tessdata"];
		if (tessdataPath) {
			[fileManager copyItemAtPath:tessdataPath toPath:dataPath error:NULL];
		}
	}
	
	NSString *dataPathWithSlash = [[self applicationDocumentsDirectory] stringByAppendingString:@"/"];
	setenv("TESSDATA_PREFIX", [dataPathWithSlash UTF8String], 1);
	
	// init the tesseract engine.
	tess = new tesseract::TessBaseAPI();
	
	tess->Init([dataPath cStringUsingEncoding:NSUTF8StringEncoding],  // Path to tessdata-no ending /.
                   "fra");  // ISO 639-3 string or NULL.
                   
}