image.py 文件源码

def _try_larger_image(self, roi, cur_text, cur_mrz, filter_order=3):
        """Attempts to improve the OCR result by scaling the image. If the new mrz is better, returns it, otherwise returns
        the old mrz."""
        if roi.shape[1] <= 700:
            scale_by = int(1050.0/roi.shape[1] + 0.5)
            roi_lg = transform.rescale(roi, scale_by, order=filter_order, mode='constant')
            new_text = ocr(roi_lg)
            new_mrz = MRZ.from_ocr(new_text)
            new_mrz.aux['method'] = 'rescaled(%d)' % filter_order
            if new_mrz.valid_score > cur_mrz.valid_score:
                cur_mrz = new_mrz
                cur_text = new_text
        return cur_text, cur_mrz