python實現圖片轉素描效果程式碼，程式碼如下：

# -*- coding:utf-8 -*-
 
 
import cv2
import numpy as np
from tkinter import filedialog, Tk
from os import getcwd
from re import findall
 
 
def open_path():
	# 圖片路徑
	root = Tk()
	root.withdraw()
	file_path = (filedialog.askopenfilename(title='選擇圖片檔案', filetypes=[('All Files', '*')]))
	return file_path
 
 
def dodgeNaive(image, mask):
	# determine the shape of the input image
	width, height = image.shape[:2]
 
	# prepare output argument with same size as image
	blend = np.zeros((width, height), np.uint8)
 
	for col in range(width):
		for row in range(height):
			# do for every pixel
			if mask[col, row] == 255:
				# avoid division by zero
				blend[col, row] = 255
			else:
				# shift image pixel value by 8 bits
				# divide by the inverse of the mask
				tmp = (image[col, row] << 8) / (255 - mask)
				# print('tmp={}'.format(tmp.shape))
				# make sure resulting value stays within bounds
				if tmp.any() > 255:
					tmp = 255
					blend[col, row] = tmp
 
	return blend
 
 
def dodgeV2(image, mask):
	return cv2.divide(image, 255 - mask, scale=256)
 
 
def burnV2(image, mask):
	return 255 - cv2.divide(255 - image, 255 - mask, scale=256)
 
 
def rgb_to_sketch(src_image_name):
	print('轉換中......')
	img_rgb = cv2.imread(src_image_name)
	img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY)
	# 讀取圖片時直接轉換操作
	# img_gray = cv2.imread('example.jpg', cv2.IMREAD_GRAYSCALE)
 
	img_gray_inv = 255 - img_gray
	img_blur = cv2.GaussianBlur(img_gray_inv, ksize=(21, 21),
								sigmaX=0, sigmaY=0)
	img_blend = dodgeV2(img_gray, img_blur)
 
	# cv2.imshow('original', img_rgb)
	# cv2.imshow('gray', img_gray)
	# cv2.imshow('gray_inv', img_gray_inv)
	# cv2.imshow('gray_blur', img_blur)
	cv2.imwrite(dst_image_name, img_blend)
	save_path = getcwd() + "\\" + dst_image_name  # 儲存路徑
	print('轉換完成!!!\n')
	print('儲存路徑:' + save_path)
	cv2.imshow(save_path, img_blend)
	cv2.waitKey(0)
	cv2.destroyAllWindows()
 
 
if __name__ == '__main__':
	print('請選擇圖片(路徑不要含中文)：')
	src_image_name = open_path()  # 檔案路徑
	print(src_image_name+'\n')
	image_name = ''.join(findall(r'[^\\/:*?"<>|\r\n]+$', src_image_name))  # 獲取檔名
	dst_image_name = 'Sketch_' + image_name
	rgb_to_sketch(src_image_name)