Today is the first time to write an article here, is a small sprout new, please big guys a lot of care
Today I’m going to show you how to turn a GIF into a nice hand-drawn image
PIL is used to read the picture and NUMPY is used to process the picture
The complete code is as follows:
from PIL import Image import numpy as np
Vec_el = Np.pi /2.2 # Overlooking Angle of light source
Vec_az = Np.pi /4. # Light source azimuth Angle
depth = 10.
im1 = Image.open(“mayi_50.gif”).convert(‘L’)
A = np.asarray(im1).astype(‘float’) # change to a = np.asarray(image.open (‘ tree.jpg ‘).convert(‘L’)).astype(float)
Grad = Np.gradient (a) # or take the gradient value of the image
Grad_x,grad_y=grad #
Grad_x = grad_x*depth/40
Grad_y = grad_y*depth/40
Dx = Np.cos (vec_EL)* NP.cos (vec_az)# Effect on X-axis of light source
Dy = Np.cos (vec_EL)* NP.cos (vec_az)# Influence on Y axis of light source
Dz = Np.sin (VEC_EL) # Influence on z-axis of light source
A = np.sqrt(grad_x2+grad_y2+1.)
uni_x = grad_x/A
uni_y = grad_y/A
uni_z = 1./A
A2 = 255*(DXUNI_x +dyuni_y+ Dz *uni_z) # Normalization of light source
A2 = a2. The clip (0255).
Im2 = image.fromarray (a2.astype(‘uint8’)) #
Im2. save(‘mayi_51.gif’) # change the name to save
The renderings are as follows
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