Objective

This homework will allow you to practice object creation and method invocation (for both static and non-static methods). In addition, the homework will familiarize you with the picture infrastructure we will be using in future projects.  We want to remind you that this is a closed homework and you are expected to complete all the work by yourself.

Overview

For this assignment you will write a program that allows users to manipulate jpeg images.  The program will read an image location and will process the image according to the preferences specified by the user.  After processing an image, the user can either select another image for processing or quit.  In addition to the program, you must submit a time log similar to the one associated with homework #1.

This homework will be graded as follows:

• 90% - Implementation
• 10% - Time log (only it's existence gets graded, not how much time you spend)

Specifications

Before you read these specifications, you should check out the code associated with this homework from the CVS repository.  The code provides all the classes associated with the picture infrastructure, along with the class you need to implement for this program.  The PictureDemo.java file provides an example of using some of the classes that are part of the infrastructure.  The following description provides more information about each of the classes you will find in the code distribution.

• Picture - Defines methods every class considered a picture must implement.  You can ignore this class for this homework.
• Image - This class allow us to convert a jpeg file into a picture object we can manipulate in our programs.  We can convert a jpeg image into a picture object by creating an Image object.  When we create an Image object we need to provide a reference to a String object that represents the location of the image.  See the PictureDemo.java for an example.
• PictureUtil  - It is an utility class providing methods for the manipulation of pictures. The method you will use from this class is the static method named "show" which allow us to display a picture.  Any of the picture objects you will use for this homework can be displayed by using this method.  See the PictureDemo.java for an example.
• DoubleSize - This class enable us to double the size of a picture.  When we create a DoubleSize object we need to provide a picture object reference as a parameter value.  The DoubleSize object created represents the picture that will result by doubling the size of the source picture.  See the PictureDemo.java for an example.
• FlipLeftRight - This class enable us to flip a picture on the y-axis.  When we create a FlipLeftRight object we need to provide a picture object reference as a parameter value.  The FlipLeftRight object created represents the picture that will be generated by flipping the source picture.
• Posterize - This class creates a picture object that "posterizes" an input picture.  Posterized pictures are limited to just a few values for each of the following colors:  red, green, and blue.  When we create a Posterize object we need to provide a picture object reference as a parameter value.
• ImageProcessor - This is the class you are expected to implement. We have already provided the class definition and a main() method you are expected to complete.  The processing associated with main is the following:
  • Read the location of the jpeg image the user wants to process.  This jpeg file represents the source picture.
  • Display the source picture using PictureUtil.
  • The user has three processing alternatives: doubling, flipping, and posterizing the source picture.  For each alternative, your program will ask the user whether that processing is to be performed on the source picture.  If that is the case, the particular processing will take place and the resulting picture will be displayed.  There is a cost associated with each processing.  Doubling a picture costs $1.50, flipping costs $2.00, and posterizing has a cost of $3.00.  Your program must keep track of the total cost associated with the processing of images.  
  • After processing a jpeg image your program should ask the user whether another image will be processed.  If that is the case, the steps described earlier will take place.  This process will continue until the user decides to stop processing jpeg images.  Once the user decides to stop processing images, your program must print the total processing cost associated with processing all the images.  We want to clarify that your program will only print the cost information after the user decides to process no further images.

The Example section provides a sample run of the program you are expected to write.  Use the example in order to define the format to follow for input and output dialog boxes.

In the code distribution you will also find two images (kittens-1.jpg and kittens-2.jpg).  We have provided these images in case you want to use them during the development phase of your homework.  

Requirements

You must use meaningful variable names and good indentation. 

Example

The following provides an sample run of the program you need to implement.  Keep in mind this is just an example and not the only scenario the program is expected to handle.  We have chosen to perform all the possible manipulations (doubling, flipping and posterizing) for the input image provided; in the example we have processed only one image.  Each of the following snapshots is preceded by a description of the processing that took place.  

Image to process has been specified

After pressing OK

After selecting YES

After selecting YES

After selecting YES

After selecting NO

Submission

Submit your project using the submit project option associated with Eclipse.  Remember to complete your time log before submitting your homework.  You must submit all the classes associated with your homework, including the supporting classes (e.g., Posterize) representing the picture infrastructure.

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