# Untitled - By: Administrator - Fri Apr 12 2024

import sensor, image, time
import display
from pyb import UART, Pin,Timer
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(time = 2000)
lcd = display.SPIDisplay()
light = Timer(4, freq=50000).channel(1, Timer.PWM, pin=Pin("P7"))
light.pulse_width_percent(10) # 控制亮度 0~100
clock = time.clock()
while(True):
    clock.tick()
    lcd.write(sensor.snapshot())
    print(clock.fps())

openmv4h plus mt9v034相机，上电启动有时候会报RuntimeError:Sensor control failed.
sensor.reset() # Reset and initialize the sensor.
sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE),BAYER
sensor.set_framesize(sensor.QQVGA) # Set frame size to QVGA (320x240),QQVGA2 (128160),QQVGA(160120)
sensor.set_vflip(True)
sensor.set_hmirror(False)
sensor.set_transpose(True)
sensor.set_auto_exposure(False,exposure_us=EXPS)
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import sensor, time, pyb, ubinascii

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time=2000)

while True:
img = sensor.snapshot().compress(quality=70) # 压缩质量为70%
hex_data = ubinascii.hexlify(img).decode() # 转为十六进制字符串
print(hex_data) # 发送数据
pyb.delay(1000)
此代码放在openmv ide烧录

LetNet Example

import sensor, image, time

sensor.reset() # Reset and initialize the sensor.
sensor.set_contrast(3)
sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.VGA) # Set frame size to QVGA (320x240)
sensor.set_windowing((128, 128)) # Set 128x128 window.
sensor.skip_frames(time = 2000) # Wait for settings take effect.
sensor.set_auto_gain(False)
sensor.set_auto_exposure(False)

while(True):
img = sensor.snapshot()
# NOTE: Uncomment to detect dark numbers on white background
# img.invert()
out = img.find_number(roi=(img.width()//2-14, img.height()//2-14, 28, 28))
img.draw_rectangle((img.width()//2-15, img.height()//2-15, 30, 30))
if out[1] > 5: # Confidence level
print("Number: %d Confidence: %0.2f" %(out[0], out[1]))

报错提示
Traceback (most recent call last):
File "", line 17, in
AttributeError: 'Image' object has no attribute 'find_number'
MicroPython v1.9.4-4510-g23e8457de on 2018-06-29; OPENMV3 with STM32F765
Type "help()" for more information.

@kidswong999 import sensor, image, time, mjpeg, pyb

RED_LED_PIN = 1

BLUE_LED_PIN = 3

sensor.reset() # Initialize the camera sensor.

sensor.set_pixformat(sensor.RGB565) # or sensor.GRAYSCALE

sensor.set_framesize(sensor.QVGA) # or sensor.QQVGA (or others)

sensor.skip_frames(10) # Let new settings take affect.

clock = time.clock() # Tracks FPS.

pyb.LED(RED_LED_PIN).on()

sensor.skip_frames(30) # Give the user time to get ready.

pyb.LED(RED_LED_PIN).off()

pyb.LED(BLUE_LED_PIN).on()

m = mjpeg.Mjpeg("test1.mjpeg")

#mjpeg.Mjpeg(filename, width=Auto, height=Auto)创建一个mjpeg对象，

#filename为保存mjpeg动图的文件路径

print("You're on camera!")

for i in range(200):

clock.tick()

m.add_frame(sensor.snapshot())

#mjpeg.add_frame(image, quality=50)

#quality为视频压缩质量。

print(clock.fps())

m.close(clock.fps())

pyb.LED(BLUE_LED_PIN).off()

print("Done! Reset the camera to see the saved recording.")
测试的例程，重新上电还是一样0字节

import sensor, image, time, mjpeg, pyb
RED_LED_PIN = 1
BLUE_LED_PIN = 3
sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # or sensor.GRAYSCALE
sensor.set_framesize(sensor.QVGA) # or sensor.QQVGA (or others)
sensor.skip_frames(10) # Let new settings take affect.
clock = time.clock() # Tracks FPS.
pyb.LED(RED_LED_PIN).on()
sensor.skip_frames(30) # Give the user time to get ready.
pyb.LED(RED_LED_PIN).off()
pyb.LED(BLUE_LED_PIN).on()
m = mjpeg.Mjpeg("test1.mjpeg")
#mjpeg.Mjpeg(filename, width=Auto, height=Auto)创建一个mjpeg对象，
#filename为保存mjpeg动图的文件路径
print("You're on camera!")
for i in range(200):
clock.tick()

m.add_frame(sensor.snapshot())

#mjpeg.add_frame(image, quality=50)

#quality为视频压缩质量。

print(clock.fps())
m.close(clock.fps())
pyb.LED(BLUE_LED_PIN).off()
print("Done! Reset the camera to see the saved recording.")
测试的例程，重新上电还是一样0字节

import sensor, image, time
from pyb import UART

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.skip_frames(time = 2000)     # Wait for settings take effect.
clock = time.clock()                # Create a clock object to track the FPS.

uart = UART(3, 115200)
a=0

while(True):
    clock.tick()                    # Update the FPS clock.
    img = sensor.snapshot()         # Take a picture and return the image.
    print(clock.fps())              # Note: OpenMV Cam runs about half as fast when connected
                                    # to the IDE. The FPS should increase once disconnected.
    #code = 'A'
    #print(code)
    #uart.write(code)    
    if uart.any():
        recieve = uart.readline().decode().strip()
        print(recieve)


    if recieve == 'L':
        print("We win.")
        a=a+1
        print(a)
        print("\n")
    
    else:
        print("No FOUND")
        

你的代码不对，if recieve == 'L':应该在if uart.any():里面。

import sensor, image, time
from pyb import UART

sensor.reset()                      # Reset and initialize the sensor.
sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QVGA)   # Set frame size to QVGA (320x240)
sensor.skip_frames(time = 2000)     # Wait for settings take effect.
clock = time.clock()                # Create a clock object to track the FPS.

uart = UART(3, 115200)
a=0

while(True):
    clock.tick()                    # Update the FPS clock.
    img = sensor.snapshot()         # Take a picture and return the image.
    print(clock.fps())              # Note: OpenMV Cam runs about half as fast when connected
                                    # to the IDE. The FPS should increase once disconnected.
    #code = 'A'
    #print(code)
    #uart.write(code)    
    if uart.any():
        recieve = uart.readline().decode().strip()
        print(recieve)
        if recieve == 'L':
            print("We win.")
            a=a+1
            print(a)
            print("\n")
    
    else:
        print("No FOUND")

我使用如下函数，为什么得到的结果是这样的啊

使用前：

使用后：

代码如下：

import sensor, image, time

sensor.reset()                      # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QQVGA)   # Set frame size to QQVGA (160x120)
sensor.skip_frames(time = 2000)     # Wait for settings take effect.
clock = time.clock()                # Create a clock object to track the FPS.

while(True):
    clock.tick()                    # Update the FPS clock.
    img = sensor.snapshot()
    # img这里是彩色
    img = img.to_grayscale()
    # img这里是灰色
    print(clock.fps())

import sensor, image, time
import car
from pyb import LED
from pyb import Pin

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.

green_threshold   = (31, 66, -34, -9, -2, 18)

def find_max(blobs):    #寻找最大面积的球
    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([green_threshold])
    if blobs:
        max_blob = find_max(blobs)
        x_error = max_blob[5]-img.width()/2        
        for greenblord_threshold in  blobs:
            if greenblord_threshold.pixel() > 2000:
                car.run(30-0.5*green_x_error,30+0.5*green_x_error)
	
            elif greenblord_threshold.pixel() < 10000:
                car.run(0,0)
    else:
        car.run(20,-20)