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quantifies how much detail an image can convey

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12
votes
5answers
2k 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
2answers
150 views

Do images need special treatment for high-resolution (“retina”) displays vs regular displays?

What are people's (experimentally tested if possible) views on sharpening images depending on whether they are to be viewed on retina or non-retina devices. Assuming resolution in the file is not an ...
7
votes
2answers
45k 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 ...
0
votes
1answer
129 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 ...
0
votes
2answers
102 views

Files from my camera are very large: does this present any problem?

I have a Nikon D3200 camera. When it takes pictures in high resolution, sizes can be up to 6016×4000 pixels. Is there any problem (apart from big files) having the pictures at this resolution? Would ...
0
votes
0answers
35 views

How big can I print my 24mp image? [duplicate]

So I have a 24mp photo that I want to print as large as I can, at 300dpi; how large is that? And more generally, how is the print size calculated as a function of the capture and print resolution?
4
votes
3answers
8k 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?
0
votes
1answer
89 views

Why do some cameras have a higher resolution sensor even though the max resolution is smaller? [duplicate]

For example, the D3300 is advertised to have 24.2 megapixels, but its highest camera resolution in all types of settings including raw and full manual, the output resolution becomes 6000×4000 ...
0
votes
2answers
48 views

In Photoshop Elements, how much is image quality reduced if I re-save a previously saved “small” JPEG as a “large” JPEG?

Back story: I took a picture of a flower in RAW. Pulled it into ACR in PSE 12, moved it to the Photoshop Elements editor, made a few edits, then saved it as a "small" JPEG. When saving a pic in PSE, ...
9
votes
4answers
19k 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?
-2
votes
3answers
135 views

What is the best resolution and quality for website [duplicate]

I'm thinking the pictures on my website are too large and heavy. I was looking for the best resolution and quality to export my pictures. I found some information that says 72dpi is enough resolution ...
0
votes
2answers
96 views

What is it called when a camera generates files with more megapixels than the actual sensor provides?

I found in many Android devices that the "real array size", which is the actual pixel count of the camera sensor, is lower than the 4:3 Max picture the user can take. For example: Sensor Array = 1616 ...
1
vote
3answers
229 views

Why do my photos lack texture/detail/microcontrast? [duplicate]

edit : I have added the relevant EXIF data, Still exploring how to add the EXIF data inline with the photos, please excuse english is not my first language I am a newbie photographer with Nikon D3300 ...
0
votes
2answers
198 views

Google Photos Backup DNG file with low quality [duplicate]

Using the desktop google photos sync app, JPG files sync with resolutions like 2992x2000, and NEF files like 3008x2000. But with DNG files, only 1024x683? Tried to download the file to see if it's ...
1
vote
1answer
123 views

Does lens resolution matter when it comes to high resolution sensors? [duplicate]

I've recently seen the news about Canon's 5ds and 5dsr with their 50mp res sensors. Now I've read on some other forums that you would need some L lenses developed recently ( 5 years) or those woth ...
25
votes
5answers
10k 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 ...
9
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 landscape to increase the resolution of the final image. More details on the method here: http://en.wikipedia.org/wiki/Super-resolution What ...
2
votes
1answer
74 views

Why does my Sony Alpha 77 II sometimes change to a lower resolution on its own?

I've taken about 700 pictures with my new Sony Alpha 77 II, all at the maximum 6000x4000 resolution. However, when I reviewed the pictures afterwards there are a couple at the lower 4240x2832 ...
3
votes
3answers
1k views

Why do different smartphones with the same megapixel camera resolutions have different quality of image?

There are different brands of smart phones available. Frequently two different big brand smart phones (Nokia, Samsung , Apple, Sony etc.) with the same Megapixel count have a different quality of ...
0
votes
2answers
62 views

Why is my Sony A57 creating low res JPGs?

I have used a Sony A57 since they became available. I always have the resolution set for 16M and FINE for JPEGs. I just took an important set of photos that were intended for large blow-ups. But ...
1
vote
1answer
68 views

I am short 100 pixels for a canvas print, will that make a difference? What about if I zoomed it?

I'm looking to do a 20x24 canvas and need 1980x2340 pixels. The photo I want to use is only 1880x2340. I would like to zoom on it. I am only 100 pixels short, is that going to make a difference? or do ...
4
votes
1answer
236 views

Why is the image size different in portrait and landscape mode?

Today i noticed that my Canon EOS 5D mark II seems to create different image sizes when holding the camera in landscape or portrait mode. The Portrait Image size is always 3753x5634 pixels while the ...
0
votes
1answer
77 views

How to take high resolution pictures? [duplicate]

I came across this site unsplash and they post free high resolution pictures to use. I have a canon550D with the standard kit 18-55m and a 50mm lens. How are these high resolution pictures achieved? I ...
-7
votes
2answers
260 views

What is Nineteen Megapixels minus Sixteen Megapixels?

Recently I opted to buy a camera. I asked my brother a suggestion regarding my purchase, and suddenly he started to ask me number of questions. I was able to answer all the questions, except this one: ...
16
votes
3answers
7k 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 ...
0
votes
0answers
25 views

What my PPI should be set at for others to download my photos? [duplicate]

I sell my photos on Etsy for others to buy and download and I'm trying to figure out what I should set my PPI at and if I should resample when I do it...it is all very confusing. I'm reading all ...
2
votes
2answers
245 views

What do resolution figures mean in lens specifications?

I'm working in computer vision and choosing the right lens is obviously as critical as having a good sensor if you're going for quality inspection (for example). Sadly I have very little experience ...
1
vote
4answers
106 views

Increasing Pixels [duplicate]

I am having a company transfer a photo to a 17" x 24" poster board. They said I don't have enough resolution to upsize that much without losing clarity. So when I take a picture how do I dictate how ...
1
vote
2answers
80 views

Is resolution the same thing as active pixel count?

If you have a camera with resolution Y x X, then is active pixel count always the product of the resolution? Are they saying essentially the same thing?
0
votes
0answers
195 views

Are mobile phone camera lenses good enough to support 20MP sensors?

With mobile phone cameras approaching 20 MP while maintaining small sensor sizes, pixels dimensions are typically around 1 μm or lower. What about the lenses? Are they good enough to produce an Airy ...
1
vote
4answers
1k views

Is the camera sensor or the lens the limit to resolution?

I have a pretty high res sensor on my camera, but sometimes I have the feeling my lens doesn't even get to this resolution. How can I tell if my camera sensor has not enough resolution or if the lens ...
12
votes
4answers
978 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
148 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
vote
2answers
122 views

What is the most honest way to cite pixel count (resolution)?

Canon cites the following features for the EOS-1D X: Total Pixels: 19.3 Megapixels Effective Pixels: 18.1 Megapixels Largest Image: 17.9 Megapixels (5184 x 3456) The discrepancies are explained ...
36
votes
5answers
82k views

Is there a general formula for image size vs. print size?

What size images do I need for common print sizes, such as wallet size, 8x10, and 16x20? Is there a general formula? How could that size change if, for example, a 16x20 was printed on canvas rather ...
2
votes
1answer
113 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
votes
2answers
216 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 ...
2
votes
2answers
448 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 ...
20
votes
10answers
19k 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 ...
2
votes
2answers
119 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 ...
12
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?
4
votes
8answers
1k 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 ...
3
votes
1answer
587 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
206 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 — ...
-2
votes
1answer
230 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 ...
1
vote
2answers
255 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 ...
3
votes
2answers
181 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 ...
0
votes
4answers
120 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
314 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
52 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 ...