Python3使用CV2、PIL提升视频画质

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有一段很多年前的太极拳教学演示视频，在大屏幕电视播放，视频画面实在让人看不下去，就想有什么办法提高视频画质，安装Topaz Video Enhance AI软件可以实现，但我还是喜欢自己折腾python，直接记录折腾笔记。

安装pillow和opencv-python

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pip3 install opencv-python
pip3 install pillow

代码

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import cv2
from PIL import ImageEnhance, Image
import numpy as np
cap = cv2.VideoCapture('/Users/mymac/Movies/太极拳/24式整套 .mp4')
images = []
def img\_enhance(image):
 # 亮度增强

 enh\_bri = ImageEnhance.Brightness(image)
 brightness = 1.2
 image\_brightened = enh\_bri.enhance(brightness)
 # image\_brightened.show()

 # 色度增强

 enh\_col = ImageEnhance.Color(image\_brightened)
 color = 1.2
 image\_colored = enh\_col.enhance(color)
 # image\_colored.show()

 # 对比度增强

 enh\_con = ImageEnhance.Contrast(image\_colored)
 contrast = 1.2
 image\_contrasted = enh\_con.enhance(contrast)
 # image\_contrasted.show()

 # 锐度增强

 enh\_sha = ImageEnhance.Sharpness(image\_contrasted)
 sharpness = 1.2
 image\_sharped = enh\_sha.enhance(sharpness)
 # image\_sharped.show()

 return image\_sharped
while (cap.isOpened()):
 ret, frame = cap.read() # 读出来的frame是ndarray类型

 image = Image.fromarray(np.uint8(frame)) # 转换成PIL可以处理的格式

 images.append(image)
 cv2.imshow('frame', frame)
 if cv2.waitKey(25) & 0xFF == ord('q'):
 break
 # 同步进行增强画质处理，并显示

 image\_enhanced = img\_enhance(image) # 调用编写的画质增强函数

 cv2.imshow('frame\_enhanced', np.asarray(image\_enhanced)) # 显示的时候要把格式转换回来

 if cv2.waitKey(25) & 0xFF == ord('q'):
 break
cap.release()
cv2.destroyAllWindows()