This essay does not describe an existing computer program, just one that should exist. This essay is about a suggested student project in Java programming. This essay gives a rough overview of how it might work. I have no source, object, specifications, file layouts or anything else useful to implementing this project. Everything I have prepared to help you is right here.
This project outline is not like the artificial, tidy little problems you are spoon-fed in school, when all the facts you need are included, nothing extraneous is mentioned, the answer is fully specified, along with hints to nudge you toward a single expected canonical solution. This project is much more like the real world of messy problems where it is up to you to fully the define the end point, or a series of ever more difficult versions of this project and research the information yourself to solve them.
Everything I have to say to help you with this project is written below. I am not prepared to help you implement it; or give you any additional materials. I have too many other projects of my own.
Though I am a programmer by profession, I don’t do people’s homework for them. That just robs them of an education.
You have my full permission to implement this project in any way you please and to keep all the profits from your endeavour.
Please do not email me about this project without reading the disclaimer above.
This is a very easy project. A transparent image can be automatically cropped by removing the frame of pure transparent space around the perimeter. This makes the image file as small as possible. Space around the image can be created later with CSS (Cascading Style Sheets) padding. You read the *.png or *.gif transparent image into a BufferedImage, then scan pixel by pixel until you find the new bounds, then crop it.
You could use com.mindprod.common18.CommandLine to let you specify whole trees of files to process so you could tidy an entire website with one command.
See the source code for Cropper to see how you can crop a BufferedImage, read and write image files,
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