» Image Processing

Transforms for Video Compression, part 3: The DCT and Why Transforming is Valuable

Mike Perkins The use of transforms in data compression algorithms is at least 40 years old. The goal of this three-part series of posts is to provide the mathematical background necessary for understanding transforms and to explain why they are a valuable part of…

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Transforms for Video Compression, part 2: Matrix Representation and 2D Transforms

Mike Perkins The use of transforms in data compression algorithms is at least 40 years old. The goal of this three-part series of posts is to provide the mathematical background necessary for understanding transforms and to explain why they are a valuable part of…

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Cross Processing Images in the Gimp

Ben Mesander Color film photography looks to be fading fast; recently the last rolls of Kodachrome film were developed by the last place in the world that can process it. While black and white film developing is commonly done in home laboratories, color film deve…

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Posted In: Ben, Image Processing

Transforms for Video Compression, part 1: Vectors, the Dot Product, and Orthonormal Bases

Mike Perkins The use of transforms in data compression algorithms is at least 40 years old. The goal of this three-part series of posts is to provide the mathematical background necessary for understanding transforms and to explain why they are a valuable part of…

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Rolling CMOS Shutters and Curved Wiper Blades

Ben Mesander One time last winter I shot a photo with my camera phone out the windshield of my car, and got a strange image with curved wiper blades: No, my wipers don’t look like this! I’ve been meaning to track down the reason why this happened. It is clea…

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Creating the Orton Effect in Gimp

Ben Mesander Recently I decided to learn how to write scripts in the Gimp image editing program to automate certain tasks. The first task I wanted to automate was the Orton effect. This is an effect invented by Michael Orton in the 1990’s, which consists of tak…

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The Basics of 3D Image Acquisition

Mike Perkins One of our clients is heavily involved in 3D video and has been for several years. However, several are just now starting to think about it because of the uptick of interest in the consumer electronics world. Enough questions have been posed to us re…

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Posted In: Perk, Theory, Video
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