import sensor, time, image, pyb

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.GRAYSCALE) # or sensor.GRAYSCALE
sensor.set_framesize(sensor.B128X128) # or sensor.QQVGA (or others)
sensor.set_windowing((92,112))
sensor.skip_frames(10) # Let new settings take affect.
sensor.skip_frames(time = 500) #等待5s
# 拍摄当前人脸。
img = sensor.snapshot()

d0 = img.find_lbp((0, 0, img.width(), img.height()))


d1 = image.load_decriptor("cs/c1.orb")

dist= image.match_descriptor(d0, d1)
print(dist)

单独运行这个代码有没有问题？

import sensor, image, time, os, tf

sensor.reset()                         # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565)    # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QVGA)      # Set frame size to QVGA (320x240)
sensor.set_windowing((240, 240))       # Set 240x240 window.
sensor.skip_frames(time=2000)          # Let the camera adjust.

clock = time.clock()
while(True):
    clock.tick()
    img = sensor.snapshot()

在循环中设置sensor不是推荐的行为，帧率会非常低

从sensor采集图像当然是DMA。

https://github.com/openmv/openmv/blob/master/src/omv/sensor.c#L864

还有具体的硬件型号。

OpenMV4还是OpenMV4 Plus？

sensor模组是什么？

import sensor, image, lcd

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA2)
lcd.init(triple_buffer=True)

while(True):
    lcd.display(sensor.snapshot(), x_scale=-1.0, y_scale=-1.0)

import sensor, time, image,pyb
led=pyb.LED(2)

Reset sensor

sensor.reset()

Sensor settings

sensor.set_contrast(3)
sensor.set_gainceiling(16)
sensor.set_framesize(sensor.QQVGA)
sensor.set_windowing((160, 120))
sensor.set_pixformat(sensor.GRAYSCALE)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False, value=100)
kpts=["/0.orb","1.orb","2.orb","3.orb"]
#kpts1 = image.load_descriptor("/desc.orb")

clock = time.clock()
while (True):
clock.tick()
img = sensor.snapshot()
kpts2 = img.find_keypoints(max_keypoints=150, threshold=10, normalized=True)
if (kpts2):
for t in kpts:
kpts=image.load_descriptor(t)
match = image.match_descriptor(kpts, kpts2, threshold=85)
if (match.count()>10):
led.on()
# 匹配度大于10
img.draw_rectangle(match.rect())
img.draw_cross(match.cx(), match.cy(), size=10)
else:
led.off()

        print(kpts2, "matched:%d dt:%d"%(match.count(), match.theta()))
       
img.draw_string(0, 0, "FPS:%.2f"%(clock.fps()))

L就是亮度，就是灰度。

或者可以直接设置sensor为灰度。

mt9m114不能手动设置白平衡的数值，因为sensor芯片不支持。

# Untitled - By: Lenovo - 周二 9月 17 2019

import sensor, image, time, pyb

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.GRAYSCALE) # or sensor.GRAYSCALE
sensor.set_framesize(sensor.B128X128) # or sensor.QQVGA (or others)
sensor.set_windowing((92,112))
sensor.skip_frames(10) # Let new settings take affect.
sensor.skip_frames(time = 1000)
while(True):
    img = sensor.snapshot()
    roi1=(10,0,80,60)
    roi2=(40,20,78,20)
    d1= img.find_lbp(roi1)
    d1= img.find_lbp(roi2)

用的M7模块，运行后直接断电