v831获取640x360尺寸图像和畸变矫正函数，笔记

from maix import camera, display, image
camera.config(size=(640, 360))
while True:
    img = camera.capture()
    display.show(img)

https://wiki.sipeed.com/soft/maixpy3/zh/usage/vision/maixpy3-example.html#%E4%BB%8E%E6%91%84%E5%83%8F%E5%A4%B4%E8%8E%B7%E5%8F%96%E5%9B%BE%E5%83%8F%E5%B9%B6%E6%98%BE%E7%A4%BA

畸变矫正
strength：是一个浮点数而该值确定了对图像进行去鱼眼效果的程度.
zoom：是在对图像进行缩放的数值（默认值为 1.0）
https://wiki.sipeed.com/news/MaixPy3/camera_lens_corr/v831_lens_corr.html

from maix import camera, display, image
camera.config(size=(640, 360))
while True:
    img = camera.capture()
    img = img.lens_corr(strength=2.1, zoom=0.9)
    display.show(img)