SepiaAlgo.py

#Authors SriVennelaVaishnapu 
#Email vennelavaishnapu2003@gmail.com
#Sepia Algorithm
from PIL import Image
i = Image.open("input.png")
#print(i.format,i.size,i.mode)
pixels = i.load() 
width, height = i.size
j=Image.new(i.mode,i.size)

    
for x in range(width):
    for y in range(height):
      cpixel = pixels[x, y] 
      outputRed = int((cpixel[0] * 0.393) + (cpixel[1] *0.769) + (cpixel[2] * 0.189))
      outputGreen = int((cpixel[0] * 0.349) + (cpixel[1] *0.686) + (cpixel[2] * 0.168))
      outputBlue = int((cpixel[0] * 0.272) + (cpixel[1] *0.534) + (cpixel[2] * 0.131))
      #cpixel[0] contains red value   cpixel[1] contains green value
      #cpixel[2] contains blue value  cpixel[3] contains alpha value
      if(outputRed>255):
          outputRed=255
      if(outputGreen>255):
          outputGreen=255
      if(outputBlue>255):
          outputBlue=255
      j.putpixel((x,y),(outputRed,outputGreen,outputBlue))
j.save('output.png')