为什么霍夫变换查找直线检测不到到黄色直线？

[1qx5]

为什么霍夫变换查找直线检测不到到黄色直线？

[1qx5]

@1qx5 enable_lens_corr = False # turn on for straighter lines...

import sensor, image, time

sensor.reset()
sensor.set_pixformat(sensor.RGB565) # grayscale is faster
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(time = 2000)
clock = time.clock()

min_degree = 0
max_degree = 179

while(True):
clock.tick()
img = sensor.snapshot()
if enable_lens_corr: img.lens_corr(1.8) # for 2.8mm lens...

for l in img.find_lines(threshold = 1000, theta_margin = 30, rho_margin = 30):
    if (min_degree <= l.theta()) and (l.theta() <= max_degree):
        img.draw_line(l.line(), color = (255, 0, 0))
     




print("FPS %f" % clock.fps())

[kidswong999]

请提供一下你的图片。

[1qx5]

[kidswong999]

黄色的边缘不明显。你可以先二值化，然后再找