# Find Data Matrices Example # # This example shows off how easy it is to detect data matrices using the # OpenMV Cam M7. Data matrices detection does not work on the M4 Camera. import sensor, image, time, math sensor.reset() sensor.set_pixformat(sensor.GRAYSCALE) sensor.set_framesize(sensor.QVGA) sensor.skip_frames(time = 2000) sensor.set_auto_gain(False) # must turn this off to prevent image washout... clock = time.clock() while(True): clock.tick() img = sensor.snapshot() img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens. matrices = img.find_datamatrices() for matrix in matrices: img.draw_rectangle(matrix.rect(), color = (255, 0, 0)) print_args = (matrix.rows(), matrix.columns(), matrix.payload(), (180 * matrix.rotation()) / math.pi, clock.fps()) print("Matrix [%d:%d], Payload \"%s\", rotation %f (degrees), FPS %f" % print_args) if not matrices: print("FPS %f" % clock.fps())