我不知道我或 tesseract 库是否有问题，但它的工作原理很糟糕。
Tesseract* tesseract = [[Tesseract alloc] initWithDataPath:@"tessdata" language:@"eng"];
[tesseract setVariableValue:@"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZéèô" forKey:@"tessedit_char_whitelist"]; //limit search
[tesseract setImage:[UIImage imageNamed:@"sampledoc.jpg"]]; //image to check
[tesseract recognize];
NSLog(@"%@", [tesseract recognizedText]);
[tesseract clear];
这是我要从中提取文本的示例图像：
这就是我运行后得到的：
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CHAPTER ow
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我应该怎么做？