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Prof. Baldwin shows you how to control the brightness of pixels in an image. As an example, he shows you how to create a spotlight that lights up the center of an image leaving the outer edges dark.

Table of contents

Preface

Over the years, I have published a large number of tutorials in the areas of computer programming and digital signal processing (DSP). As I have time available, I am converting the more significant of those tutorials into cnxml code and re-publishing them at cnx.org .

In the meantime, this is one of the pages in a book titled Image Processing using Java that presents PDF versions of the original tutorials to make them readily available for Connexions users.When I have time available, I plan to update this tutorial and to re-publish it as a standard page at cnx.org .

This tutorial may contain internal links to other tutorials that I have written and published somewhere on the web. Those links may, or may not still begood. In any event, if you search cnx.org for the tutorial by title or by topic, you will probably find a clean copy of thereferenced tutorial at cnx.org . If not, you can probably use a Google Advanced Search to find a copy somewhere on the web.

Click here to download and view the PDF version of this page.

The representation of program code in PDF documents is often very unreliable. Click here to download a zip file containing a clean copy of the program code discussed in this tutorial.

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java402-Processing Image Pixels using Java, Creating a Spotlight
  • File: Java402.htm
  • Published: 01/03/16
Disclaimers:

Financial : Although the Connexions website makes it possible for you to purchase a pre-printedversion of the book containing this page, please be aware that the pre-printed version probably won't contain the contents ofthe PDF file referenced above .

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchasethe pre-printed version of the book.

In the past, unknown individuals have copied my materials from cnx.org, converted them to Kindle books, and have placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of material that is freely available on cnx.org and that it was made and published without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

-end-

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Source:  OpenStax, Image processing using java. OpenStax CNX. Jan 04, 2016 Download for free at https://legacy.cnx.org/content/col11947/1.8
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