Mahotas – RGB to Sepia Conversion

In this article we will see how we can covert rgb image to sepia in mahotas. An RGB image, sometimes referred to as a truecolor image, is stored in MATLAB as an m-by-n-by-3 data array that defines red, green, and blue color components for each individual pixel. Sepia-toning effect is used very commonly in photography. It is the process of changing the intensity on every pixel color of a gray-scale image, or so-called black-and-white.
In this tutorial we will use “lena” image, below is the command to load it.

mahotas.demos.load('lena')

Below is the lena image 

In order to do this we will use mahotas.colors.rgb2sepiamethod 

Syntax : mahotas.colors.rgb2sepia(img)
Argument :It takes image object as argument
Return : It returns image object 

Below is the implementation 

Python3

# importing required libraries
import mahotas
import mahotas.demos
from pylab import gray, imshow, show
import numpy as np

# loading image
img = mahotas.demos.load('lena')


# showing image
print("Image")
imshow(img)
show()

# rgb to sepia
new_img = mahotas.colors.rgb2sepia(img)

# showing new image
print("New Image")
imshow(new_img)
show()

Output :

Image

New Image

Another example 

Python3

# importing required libraries
import mahotas
import numpy as np
import matplotlib.pyplot as plt
import os

# loading image
img = mahotas.imread('dog_image.png')

# filtering image
img = img[:, :, :3]

# showing image
print("Image")
imshow(img)
show()

# rgb to sepia
new_img = mahotas.colors.rgb2sepia(img)

# showing new image
print("New Image")
imshow(new_img)
show()

Output :

Image

New Image