opencv 实现图片亮度增强和图片美白

港控/mmm° 2021-11-09 02:32 677阅读 0赞

1，图片亮度增强在解析出来的r,g,b基础上增加一定的像素值即可。

代码实现：

import cv2
    import numpy as np
    img = cv2.imread('image0.jpg',1)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    cv2.imshow('src',img)
    dst = np.zeros((height,width,3),np.uint8)
    for i in range(0,height):
        for j in range(0,width):
            (b,g,r) = img[i,j]
            bb = int(b)+40
            gg = int(g)+40
            rr = int(r)+40
            if bb>255:
                bb = 255
            if gg>255:
                gg = 255
            if rr>255:
                rr = 255
            dst[i,j] = (bb,gg,rr)
    cv2.imshow('dst',dst)
    cv2.waitKey(0)

运行结果如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70][]

3,图片的美白：p = P\*1.4(a)+ b;

代码实现：

import cv2
    import numpy as np
    img = cv2.imread('image0.jpg',1)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    cv2.imshow('src',img)
    dst = np.zeros((height,width,3),np.uint8)
    for i in range(0,height):
        for j in range(0,width):
            (b,g,r) = img[i,j]
            bb = int(b*1.3)+10
            gg = int(g*1.2)+15
    
            if bb>255:
                bb = 255
            if gg>255:
                gg = 255
    
            dst[i,j] = (bb,gg,r)
    cv2.imshow('dst',dst)
    cv2.waitKey(0)

实现结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70]: /images/20211109/93fc1f9bba3a4950bcdd4a3d3a9f2060.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 1]: /images/20211109/7b3f7c02566b4aa29fca3c77af4b5e0c.png