Lab 5: Functional Image Transformer

Overview

In this assignment, you will refactor the handler implementations to make use of a functional programming approach and support other transformations.

Assignment

The assignment builds on lab 3. Begin by incorporating feeback from your instructor on the first three lab assignments.

Functional Interface

Create a functional interface, Transformable, with one method:

• apply(int x, int y, Color color) — accepts the location and color of a pixel and returns a new (perhaps the same) color.

Image Transformation

In your controller class, implement the following method:

• transformImage(Image image, Transformable transform) — returns an Image that consists of the pixels in the input image after the transform has been applied.

Update the handler methods in your controller class that applied transformations so that they make use of the transformImage() method. When completed, none of the handler methods should have loops in them.

Additonal Transformations

Add support for the following transformations:

• Red — Converts to a red version of the currently displayed image.
• Red-Gray — Converts the displayed image to a version where the pixels in each odd numbered line are transformed using the Red transformation and the pixels in each even numbered line are transformed using the Grayscale transformation. explanation
• Two additional transformations using your own creativity.

Just For Fun

Ambitious students may wish to:

• Add additional transformations.
• Add support for selecting a portion of the image and only applying the transformation to the user-selected portion of the image.

Acknowledgement

This laboratory assignment, developed by Dr. Chris Taylor.