Open

by damned truths

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

quantifies how much detail an image can convey

learn more… | top users | synonyms

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 ...
4
votes
1answer
70 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 ...
11
votes
4answers
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.
-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
147 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 ...
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 ...
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?
4
votes
8answers
955 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
108 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
188 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
129 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
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 ...
3
votes
2answers
164 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
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
273 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 ...
22
votes
5answers
8k 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 ...
5
votes
6answers
23k 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 ...
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
215 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
136 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 ...
14
votes
6answers
3k 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 ...
34
votes
5answers
58k 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 ...
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, ...
8
votes
6answers
30k 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 ...
0
votes
3answers
198 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 ...
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 ...
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
347 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 ...
0
votes
1answer
270 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
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 ...
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
124 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 ...
-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
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, ...
7
votes
1answer
610 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 ...
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. ...
2
votes
3answers
667 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 ...
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. ...
3
votes
2answers
3k 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 ...
7
votes
4answers
584 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 ...
2
votes
2answers
327 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 ...
5
votes
1answer
36k 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 ...
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 ...