resolution   5272

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Understanding resolution and MTF
The sharpness of a photographic imaging system or of a component of the system (lens, film, image sensor, scanner, enlarging lens, etc.) is characterized by a parameter called Modulation Transfer Function (MTF), also known as spatial frequency response. We present a unique visual explanation of MTF and how it relates to image quality. A sample is shown on the right. The top is a target composed of bands of increasing spatial frequency, representing 2 to 200 line pairs per mm (lp/mm) on the image plane. Below you can see the cumulative effects of the lens, film, lens+film, scanner and sharpening algorithm, based on accurate computer models derived from published data. If this interests you, read on. It gets a little technical, but I try hard to keep it readable.
photography  resolution  sharpness  MTF 
5 days ago by euler
Depixelizing Pixel Art
Johannes Kopf and Dani Lischinski — SIGGRAPH 2011 — “We describe a novel algorithm for extracting a resolution-independent vector representation from pixel art images, which enables magnifying the results by an arbitrary amount without image degradation...”
icons  sprite  resolution  curve  siggraph  art 
7 days ago by cwr
Canon EOS 5D MkIII Sensor Vs. Nikon D800 Sensor - Bob Atkins Photography
I think it's pretty clear that the Nikon D800 sensor beats the Canon EOS 5D MkIII sensor, at least in terms of resolution and also in dynamic range at low ISO settings. The output of the D800 sensor at low ISO is remarkably clean.
canon  nikon  d800  5dmk3  reference  dynamicrange  resolution  photography 
11 days ago by bwiese
Digital cameras vs. film, part 1
Based on the equivalence of 10.2 micron pixels with film, I estimate that a full-frame sensor with 8.3 megapixels would have resolution equal to 35mm film. Slightly more pixels would be required for smaller sensors with lenses designed to cover full-frame 35mm. The simulated resolution of the Canon EOS 10D relative to 35mm film (82%) agrees well with my tests on the 10D. Likewise, the simulated resolution of the Nikon D100 agrees with Dennis Wilkins' tests.
filmphotography  resolution  digital  photography  analysis  reference 
11 days ago by bwiese
I STILL SHOOT FILM - poor argument on film resolution
not a good argument, with good details in the comments

Now remember, there is no grain (though still noise) on the digital sensor, so overall noise is going to be lower, thus perceived resolution is better. According to Norman Koren, digital needs only 80% or so of the lp/mm compared to film to achieve the same perceived resolution. Actually, the larger sensors have even less noise than the sensors he was testing so the difference is way greater.
filmphotography  resolution  sharpness 
11 days ago by bwiese
M. C. Escher (1898-1972). Prints and Drawings - Digital Commonwealth
Collection from the Boston Public Library featuring very high resolution scans of his works.
art  escher  high  resolution 
17 days ago by timstahmer

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