rebecca's WIP

digital imaging

For our DIY camera, Dalit and I took the sensor board from a webcam and then used the optical lens from a mouse to create our own camera. It mostly works! It performs better on a screen or something that’s backlit (without the backlighting, the image is fairly fuzzy and very pink), but we were able to get it reading very small type. We put it back in the original housing so you can use the mouse as a camera / magnifier.

CameraSensor IMG_0770 IMG_0776 IMG_0777Photo on 11-30-15 at 8.40 PM #2Photo on 11-30-15 at 8.40 PM #3

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High-speed imaging (a technique called schlieren imaging) captures what happens when a laser ignites a bubble of methane. Not only a beautiful image, but has interesting potential applications in scientific education!

From this article in The New York Times

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This week in Digital Imaging we created color images from black and white RGB color separations. This is the same technique used by Sergei Prokudin-Gorskii, an early 20th century Russian photographer who took some of the earliest color images.

The basic premise is that using red, green and blue filters, you take three separate black and white pictures that capture the red information in a scene, the green information, and the blue information respectively. Then, using Photoshop (or other tools such as Image J), you can combine the three color channels into a single color image. Unlike digital color images (which use the camera’s color filter array and thus minimize the color information collected by the camera), this process allows you to a broader range of more accurate color information.

Below you can see each of the three images I took, and then how they combined into a color photograph (plus what that looks like before and after some extra color correction).

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