https://forum.singtown.com/topic/276/如何使用roi来设定有效检测区域

可以直接在sensor里设置ROI参数，或者在find_blobs里设置ROI参数。

买了两个Openmv cam H7, 其中有一个完好，另外一个无法运行有关sensor库的程序，可以运行简单控制led 程序，一旦运行“hello world”，led就会狂闪绿灯，然后白灯，然后无限重新连接电脑。

我想问的是，写了import sensor这样的语句后，实际运行的过程中，解释器会去什么地方找对应的代码？C++是编译的过程中找，Python在Windows上是找对应的.py文件，那microPython在哪找呢？

请在这里粘贴代码

import pyb
import sensor, image, time, math
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

while(True):
#拍摄一张照片
img = sensor.snapshot()

enable_lens_corr = False # turn on for straighter lines...打开以获得更直的线条…
import sensor, image, time

sensor.reset()
sensor.set_pixformat(sensor.RGB565) #灰度更快
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(time = 2000)
clock = time.clock()

min_degree = 0
max_degree = 179

while(True):
    clock.tick()
    img = sensor.snapshot()
    if enable_lens_corr: img.lens_corr(1.8) # for 2.8mm lens...
    
    lines = img.find_lines(threshold = 1000, theta_margin = 25, rho_margin = 25)
    if lines:
        line = lines[0]
        print(line.x1())

import time, sensor, image
from image import SEARCH_EX, SEARCH_DS
sensor.reset()
sensor.set_contrast(1)
sensor.set_gainceiling(16)
sensor.set_framesize(sensor.QQVGA)
sensor.set_pixformat(sensor.GRAYSCALE)

template = image.Image("/template.pgm")

clock = time.clock()

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

    r = img.find_template(template, 0.70, step=4, search=SEARCH_EX)
    if r:
        img.draw_rectangle(r)
        x = r[0]
        y = r[1]
        w = r[2]
        h = r[3]
        cx = x + w/2
        cy = y + h/2
        print(cx, cy)
    print(clock.fps())

import sensor, image ,time
from pyb import UART
uart = UART(3, 9600)
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA) # can be QVGA on M7...
sensor.skip_frames(30)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...
while(True):
    img = sensor.snapshot()
    img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens.
    for code in img.find_qrcodes():                  
        print(code)
        if(code==1):        
            uart.write("1")
        if(code==2):    
            uart.write("2")
         
    

import sensor, image ,time
from pyb import UART
uart = UART(3, 9600)
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA) # can be QVGA on M7...
sensor.skip_frames(30)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...
while(True):
    img = sensor.snapshot()
    img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens.
    for code in img.find_qrcodes():                  
        print(code)
        if(code.payload()=='1'):        
            uart.write("1")
        if(code.payload()=='2'):    
            uart.write("2")
         

# Untitled - By: 33316 - Tue May 7 2024

import sensor, image, time
from machine import UART   #openart专用machine

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

clock = time.clock()
hei   =  (1, 38, 12, -36, -128, 12)

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

    img_ezh_hei.binary([hei])
    for x in range(0,320):
        for y in range(240,0,-1):
            if(img_ezh_hei.get_pixel(x,y)==(0,0,0)):
                a=1
        print(x)

用到一个定时器，一个pwm，出现报错ValueError: Pin(D12) doesn't have an af for Timer(2)

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

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.

RUN = LED(4)
STATUE = LED(1)
tim = Timer(4, prescaler=83,period=370)
#驱动蜂鸣器
def BeepOn():
    tim.channel(1, Timer.PWM, pin=Pin("P7"), pulse_width=187)
#关闭蜂鸣器
def BeepOff():
    tim.channel(1,Timer.PWM, pin=Pin("P7"), pulse_width=0)

def tick(timer):            # we will receive the timer object when being called
    RUN.toggle()
    
tim = Timer(2, freq=1)      # create a timer object using timer 4 - trigger at 1Hz
tim.callback(tick)          # set the callback to our tick function

BeepOn()
while(True):
    img = sensor.snapshot()         # Take a picture and return the image.
                                    # to the IDE. The FPS should increase once disconnected.