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December 24, 2016 06:55
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#! /usr/bin/env python | |
# -*- coding: utf-8 -*- | |
import numpy as np | |
import cv2 | |
from PIL import Image | |
import pytesseract | |
import sys | |
import math | |
if __name__ == '__main__': | |
## 画像読み込み | |
filename = 'traff3.jpg' | |
img = cv2.imread(filename, cv2.IMREAD_COLOR) | |
# 補正したい画像中の台形の四隅の座標 | |
# upper left | |
Q1 = np.array([int(192), int(136)]) | |
# upper right | |
Q2 = np.array([int(607), int(115)]) | |
# lower right | |
Q3 = np.array([int(658), int(382)]) | |
# lower left | |
Q4 = np.array([int(230), int(408)]) | |
ratio = 1.6 | |
# 補正後の長方形の高さと幅 | |
newRecHeihgt = int(math.sqrt((Q3[0]-Q2[0])*(Q3[0]-Q2[0]) + (Q3[1]-Q2[1])*(Q3[1]-Q2[1]))) | |
newRecWidth = int(ratio * newRecHeihgt) | |
# 補正後の新しい四隅の座標 | |
R1 = Q1 | |
R2 = np.array([R1[0]+newRecWidth, R1[1]]) | |
R3 = np.array([R1[0]+newRecWidth, R1[1]+newRecHeihgt]) | |
R4 = np.array([R1[0], R1[1]+newRecHeihgt]) | |
# 補正後の長方形の形を赤線で表示 | |
rec = cv2.imread(filename, cv2.IMREAD_COLOR) | |
cv2.rectangle(rec, (R1[0],R1[1]), (R3[0],R3[1]), (0, 0, 255), 3) | |
cv2.imshow('rectangle', rec) | |
# それぞれの座標をnumpyのarrayへ | |
src = np.array([Q1,Q2,Q3,Q4], np.float32) | |
dst = np.array([R1,R2,R3,R4], np.float32) | |
print src | |
print dst | |
# Perspective Correction | |
# 透視変換の行列を求める | |
transmtx = cv2.getPerspectiveTransform(src,dst) | |
offsetSize = int(250) | |
# 変換行列を用いて画像の透視変換 | |
warp = cv2.warpPerspective(img, transmtx, (newRecWidth+offsetSize, newRecHeihgt+offsetSize)) | |
# 変換後の画像表示 | |
cv2.imshow('warp', warp) | |
# 画像を保存 | |
cv2.imwrite('warp.jpg', warp) | |
cv2.waitKey(0) | |
cv2.destroyAllWindows() |
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