4. TypeError: object with buffer protocol required 出现错误
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    • TypeError: object with buffer protocol required 出现错误

    • I
       

      请在这里粘贴代码
```# Single Color RGB565 Blob Tracking Example
#
# This example shows off single color RGB565 tracking using the OpenMV Cam.

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

uart = UART(3, 19200)

threshold_index = 0 # 0 for red, 1 for green, 2 for blue

# Color Tracking Thresholds (L Min, L Max, A Min, A Max, B Min, B Max)
# The below thresholds track in general red/green/blue things. You may wish to tune them...
thresholds = [(30, 100, 15, 127, 15, 127), # generic_red_thresholds
              (30, 100, -64, -8, -32, 32), # generic_green_thresholds
              (0, 30, 0, 64, -128, 0)] # generic_blue_thresholds

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
clock = time.clock()

# Only blobs that with more pixels than "pixel_threshold" and more area than "area_threshold" are
# returned by "find_blobs" below. Change "pixels_threshold" and "area_threshold" if you change the
# camera resolution. "merge=True" merges all overlapping blobs in the image.

def findColor(r,g,b):
    rr = int(r)
    gg = int(g)
    bb = int(b)
    if rr > gg and rr > bb :
        return 'r'
    if gg > rr and gg > bb :
        return 'g'
    if bb > rr and bb > gg :
        return 'b'

while(True):
    time.sleep(100)
    clock.tick()
    img = sensor.snapshot()
    rgbs = img.get_pixel(int(img.width()/2),int(img.height()/2+0.5))
    print(findColor(rgbs[0],rgbs[1],rgbs[2])) 
    result = findColor(rgbs[0],rgbs[1],rgbs[2])
    uart.write(result)
      0

    • findColor有问题，有默认返回值吗？否则会返回None。

      0