weight = 18

Lab 8: Final Project, Part I

Intro Video

Objectives

Resources

Overview

In this assignment you will be developing an image manipulation program. The remaining laboratory assignments will build on this one, allowing you to improve your initial submission based on feedback from your instructor. The program itself will be capable of reading and writing multiple image formats including .jpg, .png, and a custom format: .msoe files. The program will also be able to apply simple transformations to the image like:

The transformations are applied to the image that appears on the screen (rather than the image originally loaded from the file) so that multiple transformations can be applied. For example, the user should be able to create a negative grayscale image by clicking both buttons.

Assignment

This assignment has been designed to provide numerous ways in which the program may be expanded. Students are encouraged to use their creativity to implement additional functionality beyond the requirements of the assignment; however, it is important to complete the required functionality before getting too carried away.

User Interface

Figure 1: User Interface1)

In short you must implement the following functionality:

All of your classes should be placed in a package whose name matches your MSOE username.

Details

Handler Methods

Your user interface does not need to match Figure 1 but does need to facilitate all of the functionality in an intuitive way. You must incorporate the following methods into your design:

You may use FXML but are not required to do so.

.msoe File Format

The custom .msoe file format is a text based file format for storing images. It is designed to be easy to load and save, but results in comparatively large file sizes. The contents of a very small image of a white-on-black + symbol is shown below:

MSOE
3 3
#000000 #FFFFFF #000000
#FFFFFF #FFFFFF #FFFFFF
#000000 #FFFFFF #000000

Your program should be able to load this .msoe image.

Loading and Saving Images

The program must support loading and saving .jpg, .png, and .msoe image file formats. The load button will open a FileChooser dialog that will allow the user to select the file to be loaded (showOpenDialog()). The program will use the extension to determine the format of the file and load the image. If the file extension is not supported or the file contents does not match the file extension, the program will display an error message. Pressing the reload button will reload the most recently loaded image.

The save button will open a FileChooser dialog box that will allow the user to select the destination folder and type in the filename and extension (showSaveDialog()). The program will then write the image to that file using the file format that matches the file extension. If an unsupported file extension is entered, the program will display an error message without attempting to save the image.

You should write your own ImageIO class is responsible for loading and saving images. The class must have the following public class methods:

If the extension on the file passed to either of these methods is .msoe then the appropriate private class method below is called to do the actual work.

Both read() and write() must throw an IllegalArgumentException if the path passed in has a file extension that specifies an unsupported image format.

You may use the ImageUtil class ImageUtil.jar to read and write files in the .jpg and .png formats. You must implement your own code to read and write .msoe files.

Grayscale

This transformation converts the image into a grayscale image. If the image is already grayscale, the transformation has no affect. In this transformation, the RGB components of each pixel are replaced with a single value. The replacement value can be calculated as: gray = 0.2126R + 0.7152G + 0.0722B more info.

Grayscale

Grayscale Example

Negative

This transformation converts the image into a photo negative of the original image. In this transform, each RGB component is replaced with 1.0 - original value. Thus, an RGB value of (1.0, 1.0, 0.0) would become (0.0, 0.0, 1.0). more info.

Negative

Negative Example

Exception Handling

There are a number of situations that could cause your program to throw an exception. For example, if the file is not found, cannot be opened, or contains incorrectly formatted data, it is likely that an exception will be thrown. In these cases, the program should display an useful message.

Just For Fun

There are many additional enhancements that could build on the required functionality. You are encouraged to enhance this application using your creativity. A number of potential enhancements are included below; however, you should not feel limited to these suggestions.

Acknowledgment

This laboratory assignment was developed by Dr. Chris Taylor.

1) The label at the bottom center of the window is not required but is the first enhancement suggested in the Just for Fun section.
See your professor's instructions for details on submission guidelines and due dates.