如果可以要怎么用？

例如
tv.init(triple_buffer=False) # Initialize the tv.
tv.channel(8) # For wireless video transmitter shield

想问人脸分辨的精确度怎么样能提高呢？可以用神经网络做人脸分辨吗？

image.grayscale_to_rgb(grayscale_value) 这个函数返回是RGB888的颜色数据，想要得到RGB565的颜色数据，自己用函数将RGB88转RGB565得到的颜色数据会失真

# Snapshot Example
#
# Note: You will need an SD card to run this example.
#
# You can use your OpenMV Cam to save image files.

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

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(time = 2000) # Let new settings take affect.

uart = UART(3, 19200,timeout_char=1000)

pyb.LED(RED_LED_PIN).on()
sensor.skip_frames(time = 2000) # Give the user time to get ready.

pyb.LED(RED_LED_PIN).off()
pyb.LED(BLUE_LED_PIN).on()

img = sensor.snapshot() # or "example.bmp" (or others)

pyb.LED(BLUE_LED_PIN).off()

uart = UART(3, 19200)
fr = True
while(fr):
    p_width=image.width()
    p_height=image.height()
    uart.write("12345")
    for x in range(p_width):
        for y in range(p_height):
            rgb=img.get_pixel(n,k)
            uart.write(rgb[0])
            uart.write(rgb[1])
            uart.write(rgb[2])
    uart.write("12345")
    fr = False

查过连线的问题，RX和TX交错连线，GND相连

是的，是按照教程做的

如何用串口通讯发送图片信息，图片信息是如何发送的，求教

OpenMV3串口通讯 按教程用TTL转USB做的，串口助手收不到信息，请问会是哪里出了问题，程序用的是例程，波特率也调过了。