quantifies how much detail an image can convey
1
vote
1answer
230 views
Is it better to take a high resolution photo and then resize it than to take it at lower resolution? [duplicate]
Possible Duplicate:
Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later?
Compare these two scenarios (using the same camera):
1) You take a ...
9
votes
3answers
1k views
Does change of lens affect a camera's megapixels?
I have a Nikon D40. It has only 6.1 MP. I am planning to buy additional lens for it. Can changing the lens of the camera increase or decrease the megapixels of the camera?
11
votes
5answers
1k views
What megapixel value is equivalent to which ISO film?
Is there some kind of equivalency table or formula that expresses what kind of pixels you need in a digital camera to have roughly the same quality as a particular ISO graded film? What other ...
3
votes
1answer
10k views
How can I upscale a low-res image to make it appear higher-res?
I want to enlarge an image to a bigger size. This will cause pixelation.
So I want to apply some treatment to it in Photoshop that will suppress some of this pixelation. Of course I cannot generate ...
7
votes
5answers
865 views
How does taking lower-resolution pictures with a higher-resolution sensor affect image quality?
Does taking a picture with 8 megapixel resolution with my Canon IXUS with a 1/2.3" sensor and 12M max resolution provides the same or worse image quality (particular, noise) as if the picture was ...
18
votes
4answers
3k views
CSI image resolution enhance: How real is it?
So I watched the following 1 minute long Youtube clip from CSI New York. In the clip, using what seems to be the recording from a standard bank camera, they zoom in at least 100, and see the image ...
14
votes
3answers
3k views
What is the Nyquist Limit and what is its significance to photographers?
The Nyquist Limit is frequently mentioned in the context of lens and sensor resolution.
What is it and what is its significance to photographers?
Here is an example of it being used by DPReview.com ...
5
votes
1answer
2k views
What resolution would be needed for a billboard advertisement?
Does anyone know the required resolution for a photograph to be used on a billboard? Would the Canon 7D be able to provide a large enough file size to meet the requirements?
2
votes
2answers
333 views
What will be typical pixel count of digital camera 8 years from now? [closed]
Sorry if this question is not serious. I was discussing this with the friend and we had different opinions. I'd think others want to throw in their opinions. The question is:
What will be typical ...
8
votes
5answers
303 views
Why does viewfinder spec state 3 times more dots than there are pixels?
My DMC-G2 has a viewfinder spec of 1,440,000 dots, but I read a review that says it is really 480,000 pixels:
The electronic viewfinder has an extremely high resolution of 1,440,000 dots (480,000 ...
4
votes
3answers
606 views
Is it worth investing in a used 35 mm Film camera?
I've a Canon 60D and I'm mainly interested in shooting landscapes. I feel very interested in buying a used canon EOS film camera (since my EF lenses are compatible).
I would like to take pictures ...
10
votes
3answers
976 views
Does shooting at lower RAW resolution using crop sensor camera mimics qualities of full frame cameras?
I'm not talking about changes to the focal length.
I've read many post that say in full frame camera the pixel density is lower compared to crop sensor camera's and so it captures more light and has ...
2
votes
1answer
477 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
168 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
658 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 ...
5
votes
3answers
2k 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
681 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?
3
votes
1answer
2k views
What's a good iPhone application to view large images (5000px+)?
I want to view large images that I transfer to my iPhone from my computer. Obviously I cannot view them completely at a 1:1 ratio, but rather I want to be able to zoom in to the 1:1 ratio. The only ...
5
votes
6answers
7k views
Is it possible to increase the pixel density of an image?
I have taken a picture whose resolution is less. I can resize the image easily (i.e I can scale to higher resolution) but the image quality goes for a toss, which is true because the image might not ...
9
votes
1answer
664 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
256 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 ...
15
votes
4answers
947 views
Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later?
Suppose you want to store your photos at some lower resolution, let's say about ~1 MB large.
You own a camera able to make photos at 5 MPix and more.
And, you want to have the maximum quality at the ...
11
votes
4answers
2k 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 = ...
9
votes
3answers
860 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
763 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 ...
5
votes
3answers
454 views
Using and earning money images from a 10yr old 5MP camera
My camera is from about 2001 and rather limited by today's standards. 5 megapixel, ISO400 at the most, f/8 is the smallest aperture, noise even in good light, a few hot pixels in the CCD, no raw ...
6
votes
4answers
808 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
212 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 ...
