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"""

Implemented an algorithm using opencv to convert a colored image into its negative

"""

from cv2 import imread, imshow, waitKey, destroyAllWindows

def convert_to_negative(img):

# getting number of pixels in the image

pixel_h, pixel_v = img.shape[0], img.shape[1]

# converting each pixel's color to its negative

for i in range(pixel_h):

for j in range(pixel_v):

img[i][j] = [255, 255, 255] - img[i][j]

return img

if __name__ == "__main__":

# read original image

img = imread("image_data/lena.jpg", 1)

# convert to its negative

neg = convert_to_negative(img)

# show result image

imshow("negative of original image", img)

waitKey(0)

destroyAllWindows()