Menu
How do I go about changing the saturation of an image using PIL or Pillow? Preferably I'd like to be able to use the solution together with the django-imagekit package. The reason I need to change the saturation is to create an effect where when the user hovers a black-and-white image it turns to colored.
945
Pillow is a fork of the Python Imaging Library (PIL). PIL is a library that offers several standard procedures for manipulating images. It's a powerful library but hasn't been updated since 2009 and doesn't support Python 3. Pillow builds on this, adding more features and support for Python 3.
The image hue is adjusted by converting the image to HSV (Hue, Saturation, Value) and cyclically shifting the intensities in the hue channel (H). The image is then converted back to original image mode.
ImageOps. flip()、ImageOps. mirror() The ImageOps module of the Python image processing library Pillow(PIL) provides flip() to flip the image upside down (vertically) and mirror() to flip the left and right (horizontally).
You probably want ImageEnhance.Color.
img = PIL.Image.open('bus.png')
converter = PIL.ImageEnhance.Color(img)
img2 = converter.enhance(0.5)
This gives an image with half the "color" of the original. This isn't exactly the same thing as half the saturation (because half or double the saturation would usually underflow or overflow), but it's probably what you actually want most of the time. As the docs say, it works like the "color" knob on a TV.
Here's an example of the same image at 0.5, 1.0, and 2.0 color:
135
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
