提取文本 OpenCV 轮廓 [英] Extracting text OpenCV Contours

问题描述

我尝试使用 tesseract 对每个单独的轮廓进行 ocr，但没有从中获取正确的文本.使用 提取文本 OpenCV 可以正确完成轮廓识别.请提出建议.

I tried doing ocr of each individual contour using tesseract but not getting proper text out of it. Contour Identification is done properly by using Extracting text OpenCV. Please suggest.

推荐答案

请检查下面的功能，如果有遗漏请告诉我.

Please check for the below function, tell me if anything is missing.

#gray out the image
gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)
cv2.imshow('gray', gray)
cv2.waitKey(0)

#image blurring
blur = cv2.blur(gray,(1,1))
cv2.imshow('Blur', blur)
cv2.waitKey(0)

#threshold & invert
ret, thresh = cv2.threshold(blur, 127, 255, cv2.THRESH_BINARY_INV)
thresh_copy = thresh.copy()
cv2.imshow("Threshold", thresh_copy)
cv2.waitKey(0)

#Erosion
kernel1 = np.ones((1,1), np.uint8)
img_erosion = cv2.erode(thresh, kernel1, iterations=1)
cv2.imshow("Erosion", img_erosion.copy())
cv2.waitKey(0)

#applying dilation
kernel = np.ones((6,10), np.uint8)
img_dilation = cv2.dilate(img_erosion.copy(), kernel, iterations=1)
cv2.imshow("Dilation", img_dilation)
cv2.waitKey(0)

#find contours
im2, ctrs, hier = cv2.findContours(img_dilation.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

return ctrs

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