README: how this blog is organized...

That's a post for beginners to show how my blog 'crazybiocomputing' is structured and connected to the mini-games of the genuine 'CrazyBioComputing' [Link] ...

Processing

Table of Contents

How can I prepare an image for further analysis , How can I remove noise and improve my signal? How can I detect interesting features ? All these questions can be solved by using various functions and tools available in ImageJ.

Exploring Gradient Direction

When working with gradient (for edge detection), it's rather interesting to visualize its orientation by drawing arrows and that's a good opportunity to try my previously published function drawArrow(...) [see post].

Test image: bump and hill

A simple test image useful to try various algorithms of gradient, edge detection,...

Drawing arrows in IJ script

Drawing arrows in a ImageJ macro/script is sometimes useful to display direction of a feature (oriented lines of interest, gradient,etc.)  but this simple drawing isn't so straightforward...

CMY(K) color image

CMY (or its variant CMYK) color space uses as primary colors: cyan, magenta, and yellow.
This color space used by printers is interesting because, this is an example of a subtractive color model. When you add color(s), you converge towards black color.

3D curves: the toric solenoids

After learning how to build and display spheres in 3D with ImageJ [see post], this post describes how we can use them for drawing a 3D curve...

Improving the Dissolve effect

In a previous post [Link], the fade-in, fade-out, and dissolve effects were described and computed in ImageJ for static images. Here are two main improvements...

3D models: the sphere

When working in 3D, there is always a need of 3D basic models to try new algorithms or to use them as building blocks. In this post, we'll see how to build a sphere and how we can move it in 3D without any additional plugins.

Using images as arrays in script

In my previous posts Using arrays in script... [TOC],  we have seen in Part 1 how to store data in arrays using the built-in function newArray(...)  and in Part 2, the use of Table windows (Results [Link] or any Table window [Link]). Here I'll describe how data storage can be done via images and how this technique is powerful for large arrays.

Fade-in, Fade-out, Dissolve video effects

When working on videos (stacks in ImageJ), it is always interesting to make transitions between video clips to finalize a small movie .... and that's possible with ImageJ.

The sieve of Eratosthenes

Finding prime numbers is a good exercise to improve your skills in the programming scripting language of ImageJ. Moreover, that's a good opportunity to use a 2D image as a temporary array.