mirror of
https://github.com/opencv/opencv.git
synced 2024-12-15 09:49:13 +08:00
57d4c86b2b
Also, removed the one from modules/python/src2/cv.py and cleared its executable bit, since it's not a script.
73 lines
1.7 KiB
Python
Executable File
73 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
'''
|
|
Data matrix detector sample.
|
|
Usage:
|
|
video_dmtx {<video device number>|<video file name>}
|
|
|
|
Generate a datamatrix from from http://datamatrix.kaywa.com/ and print it out.
|
|
NOTE: This only handles data matrices, generated for text strings of max 3 characters
|
|
|
|
Resize the screen to be large enough for your camera to see, and it should find an read it.
|
|
|
|
Keyboard shortcuts:
|
|
|
|
q or ESC - exit
|
|
space - save current image as datamatrix<frame_number>.jpg
|
|
'''
|
|
|
|
import cv2
|
|
import numpy as np
|
|
|
|
# built-in modules
|
|
import sys
|
|
|
|
def data_matrix_demo(cap):
|
|
window_name = "Data Matrix Detector"
|
|
frame_number = 0
|
|
need_to_save = False
|
|
|
|
while 1:
|
|
ret, frame = cap.read()
|
|
if not ret:
|
|
break
|
|
|
|
gray = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY)
|
|
codes, corners, dmtx = cv2.findDataMatrix(gray)
|
|
|
|
cv2.drawDataMatrixCodes(frame, codes, corners)
|
|
cv2.imshow(window_name, frame)
|
|
|
|
key = cv2.waitKey(30)
|
|
c = chr(key & 255)
|
|
if c in ['q', 'Q', chr(27)]:
|
|
break
|
|
|
|
if c == ' ':
|
|
need_to_save = True
|
|
|
|
if need_to_save and codes:
|
|
filename = ("datamatrix%03d.jpg" % frame_number)
|
|
cv2.imwrite(filename, frame)
|
|
print "Saved frame to " + filename
|
|
need_to_save = False
|
|
|
|
frame_number += 1
|
|
|
|
|
|
if __name__ == '__main__':
|
|
print __doc__
|
|
|
|
if len(sys.argv) == 1:
|
|
cap = cv2.VideoCapture(0)
|
|
else:
|
|
cap = cv2.VideoCapture(sys.argv[1])
|
|
if not cap.isOpened():
|
|
cap = cv2.VideoCapture(int(sys.argv[1]))
|
|
|
|
if not cap.isOpened():
|
|
print 'Cannot initialize video capture'
|
|
sys.exit(-1)
|
|
|
|
data_matrix_demo(cap)
|