如何获取一个像素点的LAB值

[6g4g]

如何获取一个像素点的LAB值
image.get_pixel()函数只能获取RGB

[kidswong999]

https://docs.singtown.com/micropython/zh/latest/openmvcam/library/omv.image.html#image.rgb_to_lab

用函数转换一下。

[6g4g]

用这个函数会报错呢？请问是为什么呢

[kidswong999]

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.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.

while(True):
    clock.tick()                    # Update the FPS clock.
    img = sensor.snapshot()         # Take a picture and return the image.
    pixel_rgb = img.get_pixel(0,0)
    print(pixel_rgb)
    pixel_lab = image.rgb_to_lab(pixel_rgb)
    print(pixel_lab)

[aomg]

直接用模块名，不用实例名调用