Función Wand sepia_tone() – Python

La función sepia_tone() es una función incorporada en la biblioteca Python Wand ImageMagick que se utiliza para crear un efecto de tono sepia.
 

Sintaxis: 
 

sepia_tone(threshold)

Parámetros: esta función acepta un solo parámetro como se mencionó anteriormente y se define a continuación: 
 

• umbral: este parámetro almacena el valor de umbral del efecto.

Valor de retorno: esta función devuelve el objeto Wand ImageMagick.

Imagen original: 
 

Ejemplo 1: 
 

# Import library from Image
from wand.image import Image
 
# Import the image
with Image(filename ='../geeksforgeeks.png') as image:
    # Clone the image in order to process
    with image.clone() as sepia_tone:
        # Invoke sepia_tone function with threshold as 0.8
        sepia_tone.sepia_tone(0.8)
        # Save the image
        sepia_tone.save(filename ='sepia_tone1.jpg')

Producción: 
 

Ejemplo 2: 
 

# Import libraries from the wand 
from wand.image import Image
from wand.drawing import Drawing
from wand.color import Color
 
with Drawing() as draw:
    # Set Stroke color the circle to black
    draw.stroke_color = Color('black')
    # Set Width of the circle to 2
    draw.stroke_width = 1
    # Set the fill color to 'White (# FFFFFF)'
    draw.fill_color = Color('white')
 
    # Invoke Circle function with center at 50, 50 and radius 25
    draw.circle((200, 200), # Center point
                (100, 100)) # Perimeter point
    # Set the font style
    draw.font = '../Helvetica.ttf'
    # Set the font size
    draw.font_size = 30
     
    with Image(width = 400, height = 400, background = Color('# 45ff33')) as pic:
        # Set the text and its location
        draw.text(int(pic.width / 3), int(pic.height / 2), 'GeeksForGeeks !')
        # Draw the picture
        draw(pic)
        # Invoke sepia_tone function method with threshold 0.6
        pic.sepia_tone(0.6)
        # Save the image
        pic.save(filename ='sepia_tone2.jpg')

Producción: