find_rectangles.py

#find rects
import video, sensor, image, lcd, time

lcd.init()
sensor.reset()
sensor.set_contrast(1)
sensor.set_gainceiling(16)
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.run(1)
sensor.skip_frames(30)
v = video.open("/sd/capture_rects.avi", record=1, interval=200000, quality=50)
tim = time.ticks_ms()

while(time.ticks_diff(time.ticks_ms(), tim)<30000):
    img = sensor.snapshot()
    for r in img.find_rects(threshold = 18000,roi=(80,60,160,120)):
        img.draw_rectangle(r.rect(), color = (255, 0, 0))
        for p in r.corners(): img.draw_circle(p[0], p[1], 5, color = (0, 255, 0))
    img.draw_rectangle(80,60,160,120)
    img_len = v.record(img)
    lcd.display(img)
print("finish")
v.record_finish()
lcd.clear()