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quantifies how much detail an image can convey

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20
votes
10answers
17k views

How many “MegaPixels” can the human eye see?

There is obviously a limit to what the human body can process, such as frames per second. My question is how many MegaPixels would it take before the human eye can no longer differentiate it from ...
6
votes
3answers
507 views

Why is resolution more important for landscape photography?

I have heard countless times that "resolution is of utmost importance for landscape photography". This also comes up often when landscape photographers look to medium format for it's detail and ...
5
votes
3answers
572 views

For MTF, why does 10 represent contrast while 30 represent resolution?

I'm trying to learn to read MTF charts. Everything is making sense to me, except why most explanations of MTF will refer to the 10 l/mm line as a measure of contrast while referring to the 30 l/mm ...
0
votes
2answers
496 views

Best dpi for printing a 48x18 inch at 200%?

I have an image in photoshop I want to print at 200%, and right now it's 48x18 inches, and the resolution is 72 dpi. I read somewhere that changing it to 600dpi would allow me to scale it by 200% at ...
6
votes
4answers
13k views

Are 2 megapixels enough for HD resolution pictures?

HD pictures has 1920x1080 = 2073600 pixels = 2025 kilopixel = 1.98 megapixel. Does this mean that we can take HD pictures with a 2 MP camera? If not, why not?
6
votes
3answers
3k views

Image quality when using the same lens on 16Mpix vs 24Mpix

I'm considering buying a new camera and my two candidates are Nikon D7000 and Nikon D7100. I heard that 24Mpix sensor needs very good lens to produce sharp images. Considering that I currently have ...
0
votes
1answer
879 views

How can I compare MTF50 to a manufacturer's MTF chart?

Currently working with a trial-copy of QuickMTF (Imatest's software kept crashing on me), and I'm trying to get some basic MTF readings for my Canon 85 f/1.8 lens on a 6D. My first set of test shots ...
1
vote
2answers
499 views

Canon a2300 resolution problem

I have Canon Powershot a2300. It was working fine till yesterday but i dnt know what settings have been changed to reduce the size of the image. Previously images sizes were about 4mb now it is kb's ...
2
votes
1answer
345 views

Does increased resolution compensate for diffraction?

Given a sensor size, the diffraction limit (and cut-off) are determined largely (entirely?) by the density of pixels on the sensor. With the trend of ever-increasing megapixel counts, this means that ...
1
vote
1answer
173 views

Optimal JPGs resolution out of a Point & Shoot camera for storage size and quality? [duplicate]

Simple point & shoots don't produce RAWs, they produce JPGs. Let's assume you have a modern P&S which shoots 16 megapixels maximum in Super Fine, Fine and Normal JPGs. First side question is ...
1
vote
2answers
779 views

How to scale down images in Lightroom while maintaining quality?

I am working with a product photographer who is having issues understanding dpi and resolution. She is shooting products to go onto a website using a Canon 5D and an ortery box. I have asked her to ...
0
votes
3answers
514 views

Why won't an online service print 16x20 from an 8 megapixel cell phone photo? [duplicate]

Possible Duplicate: Is there a general formula for image size vs. print size? I have a wonderful photo from my cell phone and several people would like a 16x20 or at the least a 11x14 ...
3
votes
2answers
171 views

What resolution should be used for images that are to be used in focus stacking?

I am taking a series of photos using a dSLR camera attached to a microscope that will be used in a stack to produce a single image with high depth of field. Can anyone recommend a level of resolution ...
7
votes
2answers
245 views

What does it mean to excite aliases?

I recently came across the phrase 'excited aliases.' The phrase seems to be related to lens sharpness in some way. While a web search turns up the phrase a few times, I am unable to locate a decent ...
12
votes
4answers
906 views

How can a high resolution camera matter when the output is low resolution?

The question is inspired by this question showing these pictures. The accepted answer suggests that these pictures were taken by a 8x10 view camera, and the use of a 8x10 camera was confirmed in the ...
4
votes
3answers
398 views

Shooting images smaller than the sensor size

I have a d600 and I appreciate very much the high resolution I get (useful especially for landscapes), but for most other subjects I find 6000 x 4000 to be overkill, making post-processing ...
0
votes
3answers
235 views

How can a 900X500px image have ~5400 DPI? [duplicate]

Possible Duplicate: Does the dpi number reported by camera in JPG have any meaning? I am investigating on the size and resolution of the photographs posted on the Internet. I have visited ...
5
votes
6answers
29k views

How to reduce file size without losing quality or resolution?

I have 2,300+ pictures that I want to transfer to my phone but on their original size they take up a lot of space (6.44gb) I would like to trim is down to without sacrificing quality or resolution. I ...
6
votes
3answers
377 views

Is a low-resolution scan of B&W negatives expected from a drugstore?

Shoot a roll of ilford color process B&W. Take to Walgreens. Receive CD (and negatives). Import to Aperture, crop a bit, and ask for an 8x10. Get a warning that there's not enough pixels to make a ...
1
vote
4answers
252 views

Low light pixel aggregation

If a lower resolution end image was acceptable, wouldn't it be possible to halve the width and halve the height of a low-light image and take the sum of the light in each block of 2x2 pixels when ...
4
votes
1answer
1k views

Is it better to edit photos with a high pixel per inch monitor?

Title says it all Is it better to edit photos with a high pixel per inch (PPI) monitor or is a bigger monitor better? eg. My current monitor Panel Size: 23.6“ Wide Screen True Resolution: 1920X1080 ...
1
vote
3answers
361 views

Dots per inch calculation [duplicate]

Possible Duplicate: What does DPI mean? I have a hard time understanding the concept of dots per inch. I've looked the wikipedia article and I am still unsure. Say I have a 4"x6" photograph ...
7
votes
1answer
619 views

Comparing 1:1 zoom on a 27“ screen at 2560 x 1440 vs 22” screen at 1680 x 1050

When using Adobe Photoshop or Lightroom for example, and zooming the photo at 1:1 ratio, when you work on a 22" screen at 1680 x 1050, there is an great inside zoom. On such a screen the pixel are ...
7
votes
4answers
4k views

Why are two pictures that are the same dimensions/dpi such different file sizes?

I am working on a project where two my images must be AS SMALL AS POSSIBLE. I have scaled two images to the same dimensions/dpi and I've checked the color profile in Photoshop CS6 and they both look ...
4
votes
2answers
761 views

Are cropped images from a full-frame sensor equal quality to full APS-C images despite the lower resolution?

If I put a DX lens on a Nikon D700, it will reduce megapixels to 5.1. I understand that FX pixels are about 2.5 times larger than DX pixels. Would I be correct to assume that, therefore, my FX image ...
-1
votes
2answers
317 views

How to reduce the image resolution to increase ppi?

Having an photo of 4000x3000 resolution with 240ppi. Is it possible get a resolution of 400x300 resolution but with higher ppi?If possible how to do that?
3
votes
1answer
968 views

Lightroom Exporting for web optimum settings

When exporting a batch of photos in LR you get a variety of options. For photos that are going to be eventually printed I would think that the highest resolution and 300ppi would be a good starting ...
3
votes
3answers
243 views

In what way will affordable high density displays affect photography?

The last 6 months have been quite revolutionary for the display technology with the new iPad & Retina Macbook Pro and their 200+ ppi displays that double the typical pixel densities. I have seen ...
-1
votes
1answer
155 views

Best Digital Scanning techniques - help

I want to scan a paper shown below. Actually I need the photo of the jets taking off, I dont need the entire newspaper. This is what I have - I have to do color scanning, I have a HP scanner which ...
0
votes
1answer
760 views

What does pixel count suggest? [duplicate]

Possible Duplicate: Do megapixels matter with modern sensor technology? Mobile phone manufactures now advertise their phones having camera with bigger megapixel count. Does it mean the ...
8
votes
3answers
2k views

Is there a photoshop plugin or any other piece of software that can do super resolution?

I want to combine multiple photographs of the same lanscape to increase the resolution of the final image. More details on the method here: http://en.wikipedia.org/wiki/Super-resolution What software ...
1
vote
3answers
2k views

Can I increase the resolution of a six-megapixel photo to print on a large canvas?

I took a photograph and the information tells me it is 3008x2000 and 2.2 MB. It's a darker image of two people and their reflections in a window. I'm trying to get it printed on a canvas by ...
2
votes
1answer
703 views

Resize and sharpen or sharpen and then resize?

Is there a logical reason why one is preferred over the other or it does not make any difference either way? Edit: I meant resize as in downsizing the image.
2
votes
3answers
190 views

DOF and picture quality

Is it possible to say that picture quality is better with small f number but on very small DOF, so this perfect quality degrades very quickly? So basically is there any reason to shoot with big ...
0
votes
1answer
1k views

What impact on image resolution does the aperture have?

What is the effects on depth of field, signal to noise ratio and image resolution when reducing the aperture?
0
votes
1answer
288 views

Image Quality of Shooting at 3MP then resizing to 1MP vs Shooting at 1MP [duplicate]

Possible Duplicate: Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later? I want my final image to be stored at 1MP and I want it to be in ...
1
vote
1answer
2k views

Canon Powershot SD1400 IS stuck in 640x480 mode?

For some reason, every photograph I take on my PowerShot is saved at 640x480 despite the claims that the camera has a 14.1 megapixel resolution. I only have a 1gb SD card inside the camera, and am ...
1
vote
1answer
212 views

What is the “Resolution” and how it's related to “Printing”

What do we mean by "Image Resolution" anyway and how it's related to printing on paper? Is resolution related to displaying the image on computer screens too? What is the meaning of "High ...
2
votes
1answer
736 views

Does reducing JPG resolution decrease, increase, or have no effect on image quality?

I'm getting ready to download a bunch of images from microstock photo agency Dreamstime. I'll eventually want most of the images in the 400x300 pixel range for my website when I'm done working with ...
4
votes
2answers
7k views

What image dimensions are used for 500px?

The name is 500px.com, but what is the image resolution for which to optimize before uploading your photos there?
3
votes
1answer
7k views

How large an image do I need to print a 32″ by 18″ poster at 300 DPI?

I need to have an image printed as a poster 32″ by 18″ (about 80x45 cm) at 300 DPI, but I am unsure of how big the file must be. Also, what file format is best?
0
votes
1answer
133 views

If shoot pictures in 10.0 mode or 12.0 what is quality?

If my camera is shooting in 10.0 or 12.0...what will my megapixels be? I am a beginner and I know I need them to be at least 1600x1200 for my purpose.
5
votes
5answers
9k views

What are my options for an FX wide-angle prime to suit the D800's successor? [closed]

I have a D700 which I'm not planning to replace at this point in Nikon's product cycle. I'll porbably buy the D800's successor. Not because I don't like the D800 (especially its usability ...
5
votes
2answers
612 views

Do compact and DSLR cameras have the same sensor size if they have the same number of megapixels?

In the analog camera, I understood the impact of using a 35mm film vs using a 70 mm film. However in digital world, I dont know if the sensor size is the same for compact and DSLRs. In other words, ...
7
votes
5answers
41k views

What is a suitable image resolution for canvas prints?

I would like to create a 60 inch x 20 inch canvas print using an image with a resolution of 4759x1798 (240 pixels per inch) and I would like to know if the image quality will still be good at that ...
2
votes
1answer
284 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
3k 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?
5
votes
1answer
39k 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 ...
23
votes
5answers
9k 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 ...
1
vote
1answer
11k views

How can I maintain high resolution when converting RAW images to tiff or jpeg?

I use Photoshop CS4. I use it a lot, but I don't have any experience with RAW files. I need a 600dpi image that is about 11 inches high (to be printed on a huge banner). I shot the photo in RAW ...