我正在研究印刷文本的 OCR 识别。我特别关注预处理步骤以改进Tesseract引擎的结果。我已经通过自适应阈值处理、噪声消除、文本偏斜等获得了很好的结果……但是当其他商业产品返回不错的结果时,Tesseract 似乎仍然失败。
我使用了下面的测试图像,这里是使用 Tesseract 3.04 获得的结果与两个商业 OCR api 的比较。所有 3 项服务都提供了相同的二进制图像,其中包含一些稍微模糊的文本。
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现在我想知道 Tesseract 和其他两个产品之间的巨大差距是由于不同的引擎(肯定 ABBYY 使用自己的引擎,不确定 OCR Web 服务)还是在运行 Tesseract 之前可以完成一些其他预处理步骤. 你有什么建议吗?