Supported Operations

Augmentor provides a wide variety of build-in image operations. This page provides an overview of all exported operations organized by their main category. These categories are chosen because they serve some practical purpose. For example Affine Operations allow for a special optimization under the hood when chained together.

Affine Transformations

A sizeable amount of the provided operations fall under the category of affine transformations. As such, they can be described using what is known as an affine map, which are inherently compose-able if chained together. However, utilizing such a affine formulation requires (costly) interpolation, which may not always be needed to achieve the desired effect. For that reason do some of the operations below also provide a special purpose implementation to produce their specified result. Those are usually preferred over the affine formulation if sensible considering the complete pipeline.

Distortions

Aside from affine transformations, Augmentor also provides functionality for performing a variety of distortions. These types of operations usually provide a much larger distribution of possible output images.

Color adjustments

Blurring

Resizing and Subsetting

The process of cropping is useful to discard parts of the input image. To provide this functionality lazily, applying a crop introduces a layer of representation called a "view" or SubArray. This is different yet compatible with how affine operations or other special purpose implementations work. This means that chaining a crop with some affine operation is perfectly fine if done sequentially. However, it is generally not advised to combine affine operations with crop operations within an Either block. Doing that would force the Either to trigger the eager computation of its branches in order to preserve type-stability.

Misc