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quantifies how much detail an image can convey

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2
votes
1answer
736 views

Why are low-resolution versions of my images shown in Adobe Bridge?

When I browse photos in Adobe Bridge, they are often not as sharp as they really are, as if Bridge loads a low-res version of the photo for speed. This makes it hard to pick photos that are good, as I ...
-1
votes
1answer
255 views

What's the standard photo dimension on mobile devices? [closed]

What's the standard or popular photo dimension on mobile devices like tablets and smartphones? (Android / iOS) Is it something like 1024x768 pixels?
9
votes
2answers
949 views

How do I choose which resolution (megapixel) and compression (normal, fine, superfine) to shoot in?

What do I lose if I do not shoot at maximum res? or the "superfine" setting? What are the disadvantages? I would like to learn how digital cameras save in lower resolutions jpegs. Is the extra ...
6
votes
3answers
3k views

What is the difference between image size and image quality?

I have a Casio EX-S12. It has a setting for image size, but also a separate setting for what it calls "image quality". There are three image quality values: "Fine", "Normal", and "Economy". The Casio ...
0
votes
2answers
1k views

how do you determine the size of an image based on resolution , ppi, and type?

I'd like to be able to determine the size of a an image with a particular resolution/ppi for JPEG & PNG formats. Are there any online tools to do this?
9
votes
1answer
886 views

Can the slant edge SFR method measure lens resolution greater than the Nyquist limit for the camera sensor?

The slant edge SFR method has become the standard for measuring resolution of lenses and camera systems. It works by scanning a five degree slanted edge to calculate a line spread function. This is ...
2
votes
1answer
317 views

Is the BxU measure of lens resolution still used by anyone?

The background In 2004 DxO released DxO Analyzer. It pioneered a new measure of lens resolution that it called BxU or Blur Experience Unit. Luminous Landscape reported on it (DxO Explained) and ...
12
votes
4answers
3k views

Why are effective pixels greater than the actual resolution?

This page compares Canon EOS 550D and Canon EOS 500D cameras and mentions 18.7 million effective pixels for 550D. However the best resolution possible using this camera is 5184 * 3456 = ...
11
votes
3answers
1k views

Is it true that '80s 35mm photofilm had quality corresponding to 24 megapixels?

Is it true that '80s 35mm photofilm had quality corresponding to 24 megapixels? Somebody told me so today, and I find it surprising.
4
votes
3answers
1k views

What are the advantages/disadvantages of sRAW or mRAW files compared to fullsize RAW?

Are there any non-obvious advantages/disadvantages of setting my 7D to use small or medium RAW instead of large? I seldom print pictures, and the way I take photos the sensor is almost never the ...
6
votes
4answers
1k views

Upscale iPhone taken photograph

I have taken a photo with my iPhone which i would love to use a my website background using jQuery to stretch it dynamically. However its obviously a fairly low resolution. Is there anything i can do ...
4
votes
1answer
293 views

Is this article correct about gamma error in picture scaling in common software?

That is kind of a "please proof-read an articles conclusion"-question. Some time ago I found this page: Gamma error in picture scaling. I grasp the point, that the luminosity-curve is not linear and ...