All values should be floats in the range 0.0 <= value <= 255.0. The order of the channels in the third dimension should be R, G, B, A, where A is the alpha channel. Thus, a valid shape of the arrays would be bg_img.shape = (640,320,4) and fg_img.shape = (640,320,4). Same applies to the pixels in dimension 2. Both images needs to have the same size, so the pixels in dimension 1 must be the same for bg_img and fg_img. The blend mode functions expect Numpy float arrays in the format as an input. Input and Output FormatsĪ typical blend mode operation is called like this: blended_img = soft_light(bg_img, fg_img, opacity) The examples in this chapter show how to blend images using these packages. Two popular image processing packages in Python are PIL or its fork Pillow and OpenCV.

These image data are usually obtained through functions from image processing packages. The blend mode functions take image data expressed as arrays as an input. The Blend Modes package can be installed through pip:Ĭonda install -c conda-forge blend_modes Usage However, Cython implementation is not part of this package. Further speedup can be achieved when implementing the package in Cython. It takes advantage of vectorization through Numpy. The Blend Modes package is optimized for speed. The intensity of blending can be controlled by means of an opacity parameter that is passed into the functions.

Grain Merge (known from GIMP, blend_ain_merge).

Grain Extract (known from GIMP, blend_ain_extract).

Lighten Only ( blend_modes.lighten_only).

This package currently supports the following blend modes (name of the respective functions in the package in italics): These modes are commonly found in graphics programs like Adobe Photoshop or GIMP.īlending through blend modes allows to mix images in a variety of ways. The Blend Modes package enables blending different images, or image layers, by means of blend modes. This Python package implements blend modes for images.

Gimp blend modes