opencv实现浮雕效果和改变颜色效果

淩亂°似流年 2021-11-11 12:28 427阅读 0赞

1，浮雕效果实现：  
.基本原理：根据像素与周围像素的差值确定像素值，差别较大的像素（边缘点通常像素差别较大）像素值较大，在灰度图中表现为较亮，边缘凸显，形成浮雕状，然后加上一个灰度偏移值，作为图片的整体底色。  
实现公式：newP = gray0-gray1+150  
代码实现如下：

import cv2
    import numpy as np
    img = cv2.imread('image0.jpg',1)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
    # newP = gray0-gray1+150
    dst = np.zeros((height,width,1),np.uint8)
    for i in range(0,height):
        for j in range(0,width-1):
            grayP0 = int(gray[i,j])
            grayP1 = int(gray[i,j+1])
            newP = grayP0-grayP1+150
            if newP > 255:
                newP = 255
            if newP < 0:
                newP = 0
            dst[i,j] = newP
    cv2.imshow('dst',dst)
    cv2.waitKey(0)

实现结果如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70]  
2，改变rgb ->RGB new “蓝色”  
\#b=b*1.5  
\#g = g*1.3通过改变颜色效果：代码实现：

import cv2
    import numpy as np
    img = cv2.imread('image0.jpg',1)
    cv2.imshow('src',img)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    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]
            b = b*1.5
            g = g*1.3
            if b>255:
                b = 255
            if g>255:
                g = 255
            dst[i,j]=(b,g,r)
    cv2.imshow('dst',dst)
    cv2.waitKey(0)

实现效果如下：  
![在这里插入图片描述][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/20211109/9859c9467a9b4f4198072011982fe12a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 1]: /images/20211109/8492a737d1444095bf4b780ccb2239db.png