Image Processing

In this article, I list basic scripts to save and load images. As always, I’ve assumed that you want to use NumPy and SciPy for processing your data, and that you use floating point numbers for all processing and…

This is part four of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to create the actual reconstruction from the projections that were created in…

This is part three of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to convert the preprocessed images from part two into projections…

This is part two of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to preprocess the images to correct them for variations of the X-ray source intensity and…

This is part one of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. This tutorial includes the preprocessing step that is needed to go from raw X-ray images to projections that…

In the context of images, steganography is the hiding of an image (or other information) within another image. The “carrier image” can then be sent over an untrusted channel (e.g., published on the Internet), and only people that know that the hidden message is there will…

This is part two of a tutorial that describes how to use the ASTRA Toolbox to create a 3D reconstruction from 2D projection images that were taken with a cone-beam CT scanner. In this second part, I’ll create a reconstruction from the synthetic dataset that…

This is part one of a tutorial that describes how to use the ASTRA Toolbox to create a 3D reconstruction from 2D projection images that were taken with a cone-beam CT scanner. In this first part, I’ll create a synthetic dataset…

If you’ve enjoyed, or simply read, my articles on the BRAMS network, you might be interested in the Radio Meteor Zoo. The Radio Meteor Zoo is a so-called citizen science project. In these kinds of projects, members of the public can help scientists with…