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quantifies how much detail an image can convey

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4
votes
1answer
71 views

How to estimate the minimum magnification to capture features of a certain size?

What is the correct way to estimate the minimum magnification (maximum subject distance) at which features of a certain size are resolved? My thinking is that given a system capable of resolving a ...
-1
votes
2answers
71 views

How to respect the dimensions when we reduce the images?

This question is generic. I am not a photographer or graphic artist, or expert with Photoshop. I am a simply a programmer of a website. I have a generic gallery of images that I have to put in the ...
0
votes
0answers
58 views

Where can I get poster printing for higher resolution than 5400 x 3600 for 36“ x 24”?

The highest "common" resolution I've seen for printing a poster is 5400 x 3600 for the reasonable price of (~$15), but I have the ability to make the images I want to print (procedurally generated) as ...
2
votes
2answers
148 views

How to estimate camera sensor size?

I am using a smartphone for capturing photos and I need to estimate the camera sensor size (mm*mm). I have the resolution (in pixels) and the focal length (in pixels). I can also measure the size of ...
2
votes
2answers
75 views

What is meant by pixels and DPI for photo submissions?

I am submitting a photo for an exhibit. They require a jpeg to be evaluated and then a print, if accepted. The rules indicate "Entries must be in JPEG format sized at 300 dpi on a CD (4” width of ...
11
votes
3answers
2k views

How can I open a very, very large image to downsize it?

I have an image with a 18984x28591px resolution but I can't open it with Paint or with Pixlr Editor to reduce its size. How can I convert or open this large image on my laptop?
3
votes
1answer
109 views

How does iResolution on Panasonic Lumix DMC-GM1 (Micro Four Thirds) work?

So there's this setting iResolution on my Panasonic camera, which allows values High, Standard, Low, Extended and Off. The manual of the camera doesn't tell me very much about this feature, so I'd ...
0
votes
2answers
189 views

Device to make continuous high-resolution photos?

I have a problem — I want to make a photo of a surface with high-resolution (>20 Megapixels) every second. If I will use a DSLR camera a shutter will die very quickly. If I will use a videoflow — ...
-3
votes
1answer
130 views

Which of these two metrics is a good measurement of sharpness?

I have seen two metrics used to measure the sharpness of a camera: Perceptual megapixels, used on Dxomark. Number of lines the camera can resolve in a resolution chart. However, these two ...
2
votes
1answer
101 views

Is there a tool which will resize photos based on level of actual detail in the original?

As part of my organisation workflow I like to scale down images where the quality of the photo is not making the most of the resolution (due to camera shake, low light graininess, or whatever). Is ...
1
vote
2answers
126 views

Should two identical digital pictures of the same resolution and format have the same size?

I apologize if this is the wrong stack exchange site, but I thought my question might be too specific to photo encoding for stack exchange. I recently recovered a host of digital picture files from a ...
0
votes
4answers
108 views

What is the limiting factor of picture resolution?

What is the limiting factor? E.g (thought experiment) If we are 200m away from a tree (let's pretend it's perfectly stationary) and we take an exposure for a week, shouldn't we collect enough photons ...
1
vote
3answers
106 views

Improve photo resolution [duplicate]

I have an old photo of my brother which is 29KB and resolution is 461 × 491. I need to print it in a regular image size. Is there a way to increase its size/resolution? either by iphone app or ...
0
votes
1answer
46 views

Digital Photo Paintings [duplicate]

I've be using a combination of "painting" apps on my iPad to create digital "paintings" out of my photos. I'd like to know what the digital specifications of both the initial photo AND the painting ...
1
vote
3answers
88 views

Do you lose the increased sharpness of not having an AA filter if downscaling?

I just read the DPreview of the Nikon 5300, and it mentions that its new 24-MP sensor doesn't have an anti-alias (AA) filter, allowing for higher sharpness. I was wondering if you would see the ...
0
votes
2answers
276 views

Will using snapseed make the quality of my photos worse?

I often like using simple editing software on my iPad, however if I were to shoot in RAW and then export a photo as a png/jpeg and then saving it on snapseed, would using the program make the ...
1
vote
5answers
199 views

“10 m resolution” - Expressed as screen resolution (or other way photography noob can understand)?

The X-Sat satellite captures images of Earth "with a 10 m resolution multispectral (three spectral bands in the visible and near infrared spectrum) instrument". What does this mean? Particularly, how ...
1
vote
2answers
218 views

is a camera sensor size cropped according to the change in pixel aspect ratio of a resolution?

As an example, canon 6d full frame has the highest resolution of 5472 x 3648 with a pixel aspect ratio of 3:2 . As this is the highest I assume this is utilising the full size of the sensor. If the ...
0
votes
1answer
137 views

What is the best way to resize a high-DPI image for use on the web and in mobile apps? [duplicate]

I've been given an image (I'm guessing straight from a camera) and it's currently at at 240 pixels per inch. It's been a while since I did much Photoshop; I have three questions for two requirements: ...
3
votes
0answers
49 views

increase resolution by taking several pictures - is it done? [duplicate]

What if I took two or more picture of the subject quickly one after another, then used these images to increase resolution? It seems to me that if I take two pictures of the same thing, then my ...
4
votes
8answers
957 views

What is Snapsort's true resolution?

On Snapsort I found this explanation: True resolution Manufacturers advertise high megapixels to sell their cameras, Snapsort calculates the true resolution of each camera based on the ...
5
votes
3answers
1k views

Can film be considered to have infinite resolution as opposed to digital sensors? [duplicate]

Camera sensors have an specific number of cells,and their resolution depends on this amount of cells. But film does not have this "units" of sensible material; So, does the size of the particles of ...
0
votes
3answers
111 views

Increase photo resolution by taking a high-res photo of the photo?

I want to make a big tile mural (6 ft. x 3 ft.) from a photo that is 2' x 1.5', 300 dpi. Can I get a higher resolution in the end result if I take a picture of the stock photo with my Canon DSLR, ...
0
votes
3answers
199 views

Perfect image quality for 7 foot ultra-hd screens, using PPI to cheat. Photoshop, help!

I am receiving images from clients at 300ppi that need to appear on ultra-HD screens. These images are the wrong dimensions (too small). I'm wondering if i can scale them up somehow to (without ...
2
votes
0answers
70 views

Help with calculating resolving power [closed]

I have liked your responses to the MTF questions and wondered if you could help me clear up an issue I have encountered. I have a Canon 7D with an assortment of EF and EF-S lenses. The current issue ...
4
votes
3answers
348 views

Is the megapixel count setting on a P&S digital camera real or a gimmick? [duplicate]

Does downsizing the effective recording megapixel count setting on my P&S digital camera actually decrease the sensor-megapixel density, thereby increasing pixel size and culminating in better ...
1
vote
3answers
153 views

Is this rather high resolution possible to achieve?

I'm looking to make a sticker with wood texture printed on it for a cable concealer of 1 meter. From my calculations, this requires a digital image with a DPI of 300 and a resolution of ...
0
votes
1answer
125 views

Can a image have different XResolution and YResolution?

In EXIF data I see stuff like XResolution = 72 YResolution = 72 I'm trying to display that on a site, and I was wondering if I should display both or just a single "72dpi" ? Are there any cases ...
23
votes
5answers
3k views

Is there any practical difference between saving at 300ppi or 72ppi?

I often see statements in discussions about web displayed image quality that go something like this: "I only upload pictures at 72 dpi and 1200 pixels on the long edge, so if someone copies and prints ...
0
votes
1answer
273 views

What's a good size/resolution for picture proofing?

What's a good size/resolution when showing pictures to client using a online tool for proofing ? I've noticed that 1350x900 and 72ppi is pretty good, considering image quality and size on disk. ...
1
vote
2answers
200 views

What would look better - reduce the size of image and print with lower DPI or increase the DPI instead?

I'll give an example, to make my question a bit more clear. If I have e 12Mpx camera (D700, always shooting in raw format), the highest possible resolution is 4256 × 2832. Obviously, in most cases, ...
1
vote
0answers
183 views

Why does our Canon PowerShot A1400 keep resetting to “L” resolution?

We have three Canon PowerShot A1400 cameras. Resolution on all of them has been set to S. Two of them hold this, but the third one resets itself to L every time we turn the camera off and on again. ...
1
vote
3answers
249 views

Substitute Samsung Note 3 Cam for SLR for Product Shots for eCommerce?

I'm wondering if instead of purchasing a SLR, if I can't just use my Samsung Galaxy Note 3 camera instead. This is for eCommerce photos; women's clothing, tops and bottoms namely and some jewelry. ...
2
votes
3answers
671 views

Camera/Still Resolution vs Video Resolution

Why do high resolution cameras shoot stills at high resolutions, but only typically shoot video at 1080p which is about 2 megapixels? For example I have a Sony-NEX 6 which can shoot stills at 16 ...
2
votes
2answers
328 views

How does sensor size relate to image resolution?

How is it possible that with a particular sized sensor (say APS-C) it is possible to get different sized image cameras (by this I mean a 10 megapixel camera, a 15 megapixel camera etc)? Where does ...
-7
votes
2answers
225 views

What is Nineteen Megapixels - Sixteen Megapixels? [closed]

Recently I opted to buy a camera from Smifu . I asked my Bro a suggestion regarding my purchase, suddenly he started to ask me number of questions about cameras and I was able to answer all the ...
1
vote
2answers
171 views

Oversampling: Worth it, and will it improve low-light? [duplicate]

I own a 10.2MP Sony A230, and I like to take it with me to important family and friends events... I rarely print my photos, and even then never more than around A4 size, they generally end up on ...
3
votes
3answers
230 views

How are very high resolution images displayed on low resolution monitors?

How is an image with resolution larger than the monitor resolution displayed? How are the extra pixels handled?
1
vote
0answers
44 views

LED HD TV as a monitor for post processing purpose [duplicate]

Can I use a 47" 3d led hd tv with my pc to post process my photos? I am not sure how the quality will be on such a big screen photo being of some 4900x3600 approx.
3
votes
2answers
151 views

What changes (specifically improvements) occur to image quality when you reduce the resolution in post?

If you shoot a lot of megapixels, let's say 21MP, what image improvements/changes will occur when you downsample the image to a resolution around 1920x1080 for display on a normal 1080p HD television? ...
-2
votes
1answer
218 views

What is the best camera to get that will give you a very nice photo on canvas print of 11 x 15 or larger? [duplicate]

I have tried several times to order a canvas print and it always comes back that the picture submitted will not work with the 11 x 15 canvas print and even an 8 X 10 wont work? I have a cannon E ( ...
0
votes
2answers
289 views

What is the resolution of a good compact camera in lines resolved?

After doing some internet research myself to answer this question, I finally wind up asking here. Compact cameras have similar "megapixels" than decent dSLRs, but way lower sensor sizes and certainly ...
1
vote
2answers
10k views

What is the optimal resolution required of a picture to print on an A1 size canvas?

I am working on a poster in which the background is a photo that I took myself (18 MP). I am wondering what would be the best resolution for printing this photo on an A1 canvas. This might sound very ...
18
votes
10answers
14k 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
464 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
523 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
436 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
8k 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
2k 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
788 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 ...