Book Image

Image Processing with ImageJ - Second Edition

Book Image

Image Processing with ImageJ - Second Edition

Overview of this book

Advances in image processing have been vital for the scientific and technological communities, making it possible to analyze images in greater detail than ever before. But as images become larger and more complex, advanced processing techniques are required. ImageJ is built for the modern challenges of image processing – it’s one of the key tools in its development, letting you automate basic tasks so you can focus on sophisticated, in depth analysis. This book demonstrates how to put ImageJ into practice. It outlines its key features and demonstrates how to create your own image processing applications using macros and ImageJ plugins. Once you’ve got to grips with the basics of ImageJ, you’ll then discover how to build a number of different image processing solutions. From simple tasks to advanced and automated image processing, you’ll gain confidence with this innovative and powerful tool – however and whatever you are using it for.
Table of Contents (17 chapters)
Image Processing with ImageJ Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
2
Basic Image Processing with ImageJ
Index

Morphological processing


After segmenting the image into the two components, you are left with a mask or binary image. As was clear from the examples, these masks are not always suitable for direct measurement. Imperfections in the image may result in gaps in objects or small discontinuities in structures. Also, some areas might be detected as foreground when they are actually not really objects of interest. You could manually correct this by converting the missing pixels to white or black in order to include or exclude them, respectively. In some cases, this might be the only possible recourse. However, in many cases, there are a few processing steps available that can fix these problems in a systematic way. These steps are called morphological processing, which we will examine in greater detail in the next section.

Morphological operators

ImageJ supports the two main principal operators for morphological processing: erode and dilate. It also has functions for filling holes, skeletonizing...