opencv画像の特殊効果のレリーフ効果

#浮雕效果
# newp = gray0 - gray1 + 150
import cv2
import numpy as np
import random
import math

img = cv2.imread("E:/code/conputer_visual/data/0.jpg", 1)
imginfo = img.shape
height = imginfo[0]
width = imginfo[1]
cv2.imshow("src", img)

gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
dst = np.zeros((height, width, 1), np.uint8)
for i in range(height):
    for j in range(width-1):
        grayp0 = int(gray[i,j])
        grayp1 = int(gray[i,j+1])
        newp = grayp0 - grayp1 + 150
        if newp > 255:
            newp = 255
        elif newp < 0:
            newp = 0
        dst[i,j] = newp
cv2.imshow("dst", dst)
cv2.waitKey()

原理各ピクセルは、元の画像の2つの隣接するピクセルのピクセル値の差+固定値に等しい