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Color and Imaging

Paper Implementation: ‘A Simple Algorithm for Metamer Mismatch Bodies’

Paper Implementation: ‘A Simple Algorithm for Metamer Mismatch Bodies’

In color imaging, metamer mismatch bodies are an important concept for quantifying metameric failure for a change in observer or a change…
Go to the profile of Chandler Abraham
Chandler Abraham
Oct 14, 2018
Computing 2D affine transformations using only matrix multiplication

Computing 2D affine transformations using only matrix multiplication

This is a short visual description of computing a 2D affine transformation using a single matrix multiplication step, something that…
Go to the profile of Chandler Abraham
Chandler Abraham
Jan 12, 2018
Photon Noise

Photon Noise

If you’ve ever taken a dim/underexposed photo you may have noticed you can brighten it in photoshop but the quality never matches that of a…
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Chandler Abraham
Jul 5, 2017
The Units of Spectral Radiance

The Units of Spectral Radiance

Imagine you had a bathroom scale that gave you consistent results, but the numbers it returned had no units, seemed arbitrary in magnitude…
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Chandler Abraham
May 1, 2017
Imaging the M83 Galaxy

Imaging the M83 Galaxy

My #1 favorite way to spend vacation time is cycle touring with friends, #2 is having a week to dig deep on a side project that I don’t…
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Chandler Abraham
Apr 2, 2017
Finding Satellite Crossovers with the Planet API

Finding Satellite Crossovers with the Planet API

This is a summary of a project to find crossovers between the USGS EO-1 satellite and Planet Dove satellite constellation using their…
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Chandler Abraham
Mar 10, 2017
What is the goal of white balance?

What is the goal of white balance?

Recently I’ve been working on simulating parts of the imaging pipeline in digital cameras. A source of confusion for me is that there…
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Chandler Abraham
Jan 12, 2017
Color Reproductions of Hyperspectral Images

Color Reproductions of Hyperspectral Images

This blog post is about making accurate color renderings of hyperspectral images. An exercise that serves as a relatively simple and…
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Chandler Abraham
Nov 27, 2016
A Beginner’s Guide to (CIE) Colorimetry

A Beginner’s Guide to (CIE) Colorimetry

Edit 2017: This was the first thing I ever wrote about color. I’m older and wiser and I wanted to issue a few disclaimers. Understanding…
Go to the profile of Chandler Abraham
Chandler Abraham
Sep 10, 2016
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