为什么霍夫变换检测到的直线不稳定呢

[1qx5]

一会有一会没有，这是什么导致的啊

[kidswong999]

请提供代码和图片。

[1qx5]

此回复已被删除！

[1qx5]

import sensor, image, time

fuc_threshold_01 = (49, 100, 43, 120, -128, 22)
red_threshold_01 = (0, 100, -38, 127, 39, 127)
green_threshold_01 = (62, 75, -100, -18, -4, 127)
vio_threshold_01 = (0, 53, -128, 34, -128, -1)

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # use RGB565.
sensor.set_framesize(sensor.QQVGA) # use QVGA for quailtiy ,use QQVGA for speed.
sensor.skip_frames(10) # Let new settings take affect.
sensor.set_auto_whitebal(False)
#关闭白平衡。白平衡是默认开启的，在颜色识别中，需要关闭白平衡。
clock = time.clock() # Tracks FPS.
min_degree = 0
max_degree = 179
'''
扩宽roi
'''
def expand_roi(roi):
# set for QQVGA 160120
extra = 5
win_size = (160, 120)
(x, y, width, height) = roi
new_roi = [x-extra, y-extra, width+2extra, height+2*extra]

if new_roi[0] < 0:
    new_roi[0] = 0
if new_roi[1] < 0:
    new_roi[1] = 0
if new_roi[2] > win_size[0]:
    new_roi[2] = win_size[0]
if new_roi[3] > win_size[1]:
    new_roi[3] = win_size[1]

return tuple(new_roi)

while(True):
clock.tick() # Track elapsed milliseconds between snapshots().
img = sensor.snapshot() # Take a picture and return the image.
# pixels_threshold=100, area_threshold=100
blobs = img.find_blobs([red_threshold_01], area_threshold=150)
blobs2 = img.find_blobs([green_threshold_01], area_threshold=150)
blobs3 = img.find_blobs([fuc_threshold_01], area_threshold=150)
blobs4 = img.find_blobs([vio_threshold_01], area_threshold=150)

if blobs3:
#      print(blobs)
    for blob in blobs3:
#迭代找到的目标颜色区域
        is_circle = False
        max_circle = None
        max_radius = -1

        new_roi = expand_roi(blob.rect())
        
    for l in img.find_lines(threshold =2000, theta_margin = 1, rho_margin =1,roi=new_roi):
        if (min_degree <= l.theta()) and (l.theta() <= max_degree):
            img.draw_line(l.line(), color = (255, 255, 0))
         #   print(l)



print(clock.fps())

[1qx5]

@kidswong999

[kidswong999]

我运行你的程序一直找不到。