关于openmv颜色识别的问题

[17759718141]

OPENMV识别红色的时候会有问题，看见墙壁也是红色，请问大神们这个是镜头的问题还是程序的问题？我是用来识别红色的灯

[yuan]

请附上详细的代码以及你的图像。

[17759718141]

import sensor, image, time
import json
from pyb import UART

For color tracking to work really well you should ideally be in a very, very,

very, controlled enviroment where the lighting is constant...

red_threshold = (100, 92, 104, -5, -7, 94)

You may need to tweak the above settings for tracking green things...

Select an area in the Framebuffer to copy the color settings.

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # use RGB565.
sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
sensor.skip_frames(10) # Let new settings take affect.
sensor.set_auto_whitebal(False) # turn this off.
clock = time.clock() # Tracks FPS.

uart = UART(3, 115200)

def find_max(blobs): #寻找最大的色块
max_size=0
for blob in blobs:
if blob[2]*blob[3] > max_size:
max_blob=blob
max_size = blob[2]*blob[3]
return max_blob

while(True):
clock.tick() # Track elapsed milliseconds between snapshots().
img = sensor.snapshot() # Take a picture and return the image.

blobs = img.find_blobs([red_threshold])
if blobs:
    max_blob = find_max(blobs)
    print('sum : %d'% len(blobs))
    data=[]
    for b in blobs:
        # Draw a rect around the blob.
        img.draw_rectangle(max_blob[0:4]) # rect
        img.draw_cross(max_blob[5], max_blob[6]) # cx, cy
        data.append((b.cx(),b.cy()))

    #{(1,22),(-3,33),(22222,0),(9999,12),(0,0)}
    data_out = json.dumps(set(data))
    uart.write(data_out +'\n')
    print(data_out)
else:
    print("not found!")

[17759718141]

@yuan 墙壁是红色的

[17759718141]

@yuan 大神帮忙看看，墙壁是白色，但是摄像头可以识别到，我阈值设定是红色的，我是根据一个红色信标灯调的阈值。

[yuan]

你的阈值显然是错的。

(Lmin , lmax, Amin,amax,bmin,Bmax)

最小值，最大值，你设置的阈值是反着的。