I used the opencv.TM_CCOEFF_NORMED function for matching the invoice template. However, the template matching functionality does not yield accurate results. the matching accuracy is quite poor, at only 50%. Could you please advise on what I should include or change in the process to increase the accuracy?

            templateMap = cv.matchTemplate(img_r, resized_template, cv.TM_CCOEFF_NORMED)
            min_val, max_val, min_loc, max_loc = cv.minMaxLoc(templateMap)
            threshold = 0.8

            if max_val > threshold:
                print(f"Template {template_name} found in {file_name}")
                matched_files.append(file_name)
                output_path = os.path.join(template_folder, os.path.basename(file_path))
                imwrite(output_path, img)

OpenCV, EXpecting increase 100%