Pycharm Shapes

How to convert a color picture to gray scale or pencil sketch using python :

import cv2
image = cv2.imread (r"C:\ .... \zeroo.jpg")
scale_percent = 20
width = int(image.shape[1] * scale_percent / 100)
height = int(image.shape[0] * scale_percent / 100)
dsize = (width, height)
resized = cv2.resize(image, dsize, interpolation = cv2.INTER_AREA)
gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
inverted_image = 210 - gray_image
blurred = cv2.GaussianBlur(inverted_image, (21, 21), 0)
inverted_blurred = 255 - blurred
pencil_sketch = cv2.divide(gray_image, inverted_blurred, scale=256.0)
zero = cv2.resize(pencil_sketch, dsize, interpolation = cv2.INTER_AREA)
cv2.imshow("Original Image", resized)
cv2.imshow("Pencil Sketch ", zero)

cv2.waitKey(0)

import cv2
import numpy as np
def click_event(event, x, y, flags, params):
    if event == cv2.EVENT_LBUTTONDOWN:
        points.append((x, y))
        cv2.circle(img, (x, y), 4,(0, 255, 0), -1)
        if len(points) >= 2:
            cv2.line(img, points[-1], points[-2],(0, 255, 255), 5)
        cv2.imshow('image', img)

img = np.zeros((512, 512, 3), np.uint8)
points = []
cv2.imshow('image', img)
cv2.setMouseCallback('image', click_event)
cv2.waitKey(0)
cv2.destroyAllWindows()

import cv2
import numpy as np
# img=np.full((100,100,3),255,np.uint8)
img=np.full((400,400,3),255,np.uint8)
img_resize = cv2.resize(img, (400, 400))
pt1 = (30, 30)
pt2 = (200, 120)
color = (0, 0, 255)
color2 = (12, 43, 200)
thickness = 3
# cv2.line(img,(30,30),(70,70),(0,0,255),2)
cv2.line(img_resize, pt1, pt2, color2, thickness)
cv2.line(img, pt1, pt2, color, thickness)
cv2.imshow("Line",img)
cv2.imshow("Model Image", img_resize)
cv2.waitKey(0)

import cv2
import numpy as np
# img=np.full((100,100,3),255,np.uint8)
img=np.full((400,400,3),255,np.uint8)
# img_resize = cv2.resize(img, (400, 400))
points = [[50, 10], [50, 100], [100, 60], [60, 10], [60, 60], [100, 221]]
points = np.array(points)
points = points.reshape((-1, 1, 2))
pt1 = (50, 10)
pt2 = (200, 120)
color = (0, 0, 255)
thickness = 3
isClosed = False
# cv2.line(img,(30,30),(70,70),(0,0,255),2)
cv2.line(img, pt1, pt2, color, thickness)
cv2.imshow("Line",img)
image = cv2.polylines(img, [points], isClosed, color, thickness)
cv2.imshow("image", image)
cv2.waitKey(0)

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Public Domain Notice: Copyright (c) 1988. All rights reserved. This article is part of a book entitled Autognorics. Copies are welcome to be shared or distributed publicly as long proper citations are observed. Please cite as follows: Inscription by Design, Joey Lawsin, 1988, USA.

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