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point_selector.py
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point_selector.py
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import cv2
import numpy as np
import argparse
import json
parser = argparse.ArgumentParser(description='Point Selector')
parser.add_argument('--input', type=str, help='input image path.')
parser.add_argument('--output', type=str, default='points.json', help='output json path.')
parser.add_argument('--max', type=int, default=10, help='max points.')
args = parser.parse_args()
MAX_POINTS = args.max
IMAGE = cv2.imread(args.input)
points = np.zeros((MAX_POINTS, 2),np.int)
counter = 0
def mousePoints(event, x, y, flags, params):
global counter
if event == cv2.EVENT_LBUTTONDOWN and counter < MAX_POINTS:
points[counter] = int(x), int(y)
counter = counter + 1
print(points)
def select():
while True:
if counter == MAX_POINTS:
with open(args.output, 'w') as file:
json.dump(points.tolist(), file)
break
for x in range(0, MAX_POINTS):
cv2.circle(IMAGE,(points[x][0], points[x][1]),3,(0,255,0),cv2.FILLED)
cv2.imshow("Original Image", IMAGE)
cv2.setMouseCallback("Original Image", mousePoints)
cv2.waitKey(1)
if __name__ == '__main__':
select()