Tag Archives: Photography

Noise in Digital Camera Raw Files – How to Measure it

Posted on 29 February, 2016 by

After writing two articles on the Nature of Light and its relevance to digital photography, I found that the subject of noise still fascinated me and decided that I had to make some measurements. Looking at the wiggly waveforms of … Continue reading →

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How the Nature of Light affects the performance of digital cameras — (Part 2) Noise

Posted on 26 February, 2015 by

In the second of two articles I look at another natural phenomenon, photon noise (also known as Shot noise). As with diffraction blur, the problem becomes more serious as the physical size of the sensor is reduced. Whilst this is … Continue reading →

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How the Nature of Light affects the performance of digital cameras — A new Technical Note

Posted on 10 February, 2015 by

Reducing the physical size of a camera, even if the total number of pixels is maintained, inevitably reduces the quality of the images because of two fundamental properties of light itself. This technical article looks at diffraction, usually explained by … Continue reading →

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Test Cards for Monitor Adjustment – An Update

Posted on 29 July, 2014 by

Basic adjustment of monitors and projection systems When I last updated my page on this subject (2012) I decided that it was best to offer the test cards as .png files and leave it to the user to assign a … Continue reading →

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Raw Processors: Which Demosaicing Method? (Part 2)

Posted on 23 March, 2014 by

Further Thoughts on Demosaicing Methods in Free Open Source Raw Processors I suggested in Part 1 that I would also compare the performance of different demosaicing methods on noisy images. I now believe that this would be impractical as any … Continue reading →

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Raw Processors: Which Demosaicing Method? (Part1)

Posted on 6 February, 2014 by

Comparison of Demosaicing Methods available in Free, Open Source Raw Processors My previous article included a table listing the various demosaicing algorithms offered by the four raw processors considered and I wondered why we (as users) needed such a wide … Continue reading →

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Which Raw Processor?

Posted on 8 January, 2014 by

Comparison of four free raw file processors: RawTherapee, Darktable, Lightzone and Photivo With the exception of Darktable, which is not yet available for Windows, all of the applications are available for Windows, Mac and Linux. All are free and open … Continue reading →

Posted in Computers, Photography | Tagged , , , , , , , , | 8 Comments