75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
import numpy as np
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import cv2
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import digits
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import os
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import video
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from common import mosaic
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def main():
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cap = video.create_capture()
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classifier_fn = 'digits_svm.dat'
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if not os.path.exists(classifier_fn):
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print '"%s" not found, run digits.py first' % classifier_fn
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return
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model = digits.SVM()
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model.load('digits_svm.dat')
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SZ = 20
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while True:
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ret, frame = cap.read()
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gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
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bin = cv2.adaptiveThreshold(gray, 255, cv2.ADAPTIVE_THRESH_MEAN_C, cv2.THRESH_BINARY_INV, 31, 10)
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bin = cv2.medianBlur(bin, 3)
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contours, _ = cv2.findContours( bin.copy(), cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)
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boxes = []
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for cnt in contours:
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x, y, w, h = cv2.boundingRect(cnt)
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if h < 20 or h > 60 or 1.2*h < w:
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continue
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cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 255, 0))
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sub = bin[y:,x:][:h,:w]
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#sub = ~cv2.equalizeHist(sub)
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#_, sub_bin = cv2.threshold(sub, 0, 255, cv2.THRESH_BINARY_INV | cv2.THRESH_OTSU)
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s = 1.1*h/SZ
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m = cv2.moments(sub)
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m00 = m['m00']
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if m00/255 < 0.1*w*h or m00/255 > 0.9*w*h:
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continue
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#frame[y:,x:][:h,:w] = sub[...,np.newaxis]
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c1 = np.float32([m['m10'], m['m01']]) / m00
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c0 = np.float32([SZ/2, SZ/2])
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t = c1 - s*c0
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A = np.zeros((2, 3), np.float32)
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A[:,:2] = np.eye(2)*2
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A[:,2] = t
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sub1 = cv2.warpAffine(sub, A, (SZ, SZ), flags=cv2.WARP_INVERSE_MAP | cv2.INTER_LINEAR)
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sub1 = digits.deskew(sub1)
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sample = np.float32(sub1).reshape(1,SZ*SZ) / 255.0
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digit = model.predict(sample)[0]
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cv2.putText(frame, '%d'%digit, (x, y), cv2.FONT_HERSHEY_PLAIN, 1.0, (200, 0, 0), thickness = 1)
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boxes.append(sub1)
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if len(boxes) > 0:
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cv2.imshow('box', mosaic(10, boxes))
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cv2.imshow('frame', frame)
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cv2.imshow('bin', bin)
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if cv2.waitKey(1) == 27:
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break
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if __name__ == '__main__':
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main()
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