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Image quality describes how well a photograph matches a perceived technical ideal.

learn more… | top users | synonyms (1)

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2answers
68 views

How to prepare a photo to use as a web site background [on hold]

I have just purchased a photo from iStockphoto and I want to prepare it for use as a background image for a web application. (The iStock photo id is 41509966, it's an overhead photo of people working ...
1
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1answer
78 views

How can I properly take advantage of this equipment?

I'm a newbie to photography yet I have been asked to "figure out" how to do certain things. Now, before ending up here I went old-school and picked the manual to the camera I was given (Nikon D3100), ...
0
votes
3answers
82 views

Will using a DX lens on an FX Body compromise ISO performance? [duplicate]

In terms of ISO, is the ISO performance compromised? Say I was using a 50mm DX on my FX body, would I have a lower quality ISO performance vs an FX 50mm on my FX body?
0
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0answers
105 views

What is the performance of a mirrorless system camera compared to DSLR in dim light? [duplicate]

I work for a photo studio with a focus on wedding photography. Yesterday, I came across an system camera (the Olympus OMD) and saw some astonishingly strong results shot with that camera. I was ...
0
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0answers
56 views

How much of a difference is there saving as RAW over JPEG? [duplicate]

I've heard about RAW over JPEG's for image quality but how much of a difference is there? is there a way of showing a visual representation in quality?
2
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4answers
5k views

What image quality is lost when re-saving a JPEG image in MS Paint?

Has anyone ever noticed that if you open a image in mspaint (.jpg, .jpeg) and then just save it, the image size is reduced by many folds. I use this method to reduce the file size. However, I am not ...
3
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3answers
183 views

How to remaster images from an early digital camera?

Background: I've got a lot of old photos taken by my first digital camera Epson PhotoPC 600 from 1997 and I'd love to make them look as good as possible. I do know they'll never look like those from ...
7
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5answers
1k views

Does noise in images depend upon “Megapixels” or “ISO”?

I have a question about image quality. Does noise in an image is depends upon "Megapixels" or on "ISO"?
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1answer
92 views

Does shrinking the upscaled picture improve its quality (in terms of blur)?

Take a look at the following diagrams: The original picture: The upscaled (2x, bilinear) picture: In both cases the first item in the first row is the input image. There is its 2d fft next to ...
0
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1answer
74 views

How do you downsample an image in Photoshop CS6?

I've tried reducing size but the quality is greatly reduced as well, not to mention custom pixel ratios will make it look ridiculous. What should i do? EDIT: I have used a 1936 X 2592 JPEG picutre ...
0
votes
2answers
63 views

What's the advantage of an expensive industrial camera over a consumer device for microscopy?

I am looking into CCD cameras that can be attached to a microscope. I understand that there is a premium to pay for anything labeled "industrial", but I don't really understand why they cost so much, ...
11
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6answers
3k views

Does stacking more lens filters decrease overall image quality?

As stated by @t3mujin in another thread's comments: Stacking filters will decrease image quality, as it's another piece of glass light has to go through before reaching the sensor. I was ...
3
votes
2answers
183 views

How can I detect upscaled photos?

I have a collection of JPEG photos, each 500 to 600 pixels on the longest side. How can I detect which ones have been algorithmically enlarged from a substantially smaller photo? An online ...
2
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0answers
34 views

Are there still two classes of Canon IXUS/Powershot/IXY/ELPH around?

When I last time bought a Canon Digital IXUS compact camera, there were basically two series available: "Ultra-compact" Digital IXUS 65 ... 70 ... 75 ... 85 IS ... (Europe) Powershot ...
0
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2answers
65 views

Image quality - related to camera or not? Blurry, artificially sharpened images

I bought a D90 camera recently which was well used with 67k shutter actuations. I took some photos and this is the result: On the left, you can see that the image looks blurry when zoomed into, ...
-1
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1answer
106 views

Can I get a better results with my Canon 50d?

I'm using my 50d to take photos of carpets and objects at home. Some of the light is coming from the window while other from a halogen lamp. My config is: Shutter speed 160 - Flash on - iso 1600 - ...
10
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3answers
7k views

How does using a 2x teleconverter with 70-200 f/2.8 affect use?

I recently acquired the Canon EF 70-200mm f/2.8L IS II USM lens and I love it. However the other weekend I went to Heathrow to do some aviation photography. Whilst it is great for aircraft near to ...
9
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2answers
3k views

Is it worth using Pentax's Premium JPEG quality setting?

Similar: How do I choose which resolution (megapixel) and compression (normal, fine, superfine) to shoot in? The Pentax K-5 has a JPEG quality setting called "Premium", denoted by four stars, which ...
4
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1answer
1k views

Why does my Finepix S2950 not show the image quality I expect?

I am a little confused as to why my Finepix S2950 takes photos like it does. I seem to be able to take great Macro Shots, but not landscapes. I have noticed that if I zoom into a picture enough I can ...
0
votes
4answers
686 views

Does converting RAW files to TIFF lose image quality?

Before I found out about Camera Raw, I used to convert my photos from RAW to TIFF, using the XNVIEW convertor, downloaded from the Internet. My question is whether I lost image quality or anything ...
-4
votes
1answer
144 views

Why do digital cameras not have an iso rating? [duplicate]

With conventional cameras your camera had a maximum shutter speed ( typically 1600 ), and the film you used had an ISO speed rating at which it was meant to be able to get a proper exposure under ...
0
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1answer
41 views

Retina Display-Can anyone suggest how to literally make an image “retina display”? [closed]

Can anyone suggest how to literally make an image "retina display"? I think it doesn't depends on the camera. Does their is any software for it? I want another suggestion. Can anyone suggest a ...
2
votes
1answer
112 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 ...
6
votes
1answer
140 views

How does the usual jpeg 0-100 quality settings translate into Photoshop's 0-12 quality setting?

JPEG encoders usually use a quality setting of 0-100, whereas Adobe photo software uses a 0-12 setting. Does anyone know how to convert between these? (I am actually not clear on whether the 0-100 ...
21
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10answers
9k views

Does simply opening and closing a JPEG file decrease image quality?

I've had quite a few photography classes, read many photography books, and screened many forums. And I can't find a consistent answer to this question. One "camp" says there is a loss of image quality ...
4
votes
2answers
754 views

Are there any downsides to scaling down unsharp images?

To keep my personal image catalog compact, I am considering scaling down all images that are unsharp for one reason or another, but are interesting or valuable enough not to delete them altogether. I ...
4
votes
2answers
738 views

Why do I get blurry pictures at far distances, but sharp results up close?

I took this picture: https://www.flickr.com/photos/91552641@N06/15828810701/ and if you look at the details (like the trees on the right side) they are all kinds of muddy. I had the same experience ...
0
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0answers
86 views
13
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3answers
457 views

What is the Leica look?

What is the Leica look that fans of the company claim is unique to them? What concrete differences are there that are most obvious to a layman?
3
votes
2answers
408 views

Does super-sampling produce good results?

The Lumia 1020 has a 41MP sensor in a PHONE. It down-samples the photo to 5 megapixels, improving the photo quality. But would you get a better photo by using a native 5MP sensor of the same size? In ...
0
votes
2answers
202 views

Dull and grainy photos

I am using a mirrorless Sony nex 3N camera. It has a APS-C sensor and other bells and whistles of an entry level dslr (except the mirror of course) . I upgraded from a point and shoot and expected ...
-2
votes
1answer
129 views

How does focal length determine lens quality? [duplicate]

What does an 18 - 50 mm lens mean? Are those numbers the first focal length and second focal length? How do you use this parameter to judge what kind of lens to buy? Does more equal better?
0
votes
1answer
155 views

When should I consider an image sharp? [duplicate]

Recently I am worried about the functionality of my Pentax K-50, i.e. I am not able anymore to get real sharp images. Thus my question arose, what I should see as "sharp". So I took several pictures ...
1
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2answers
5k views

What causes outdoor photos to turn out bright white when taken with a digital camera?

I set my Canon Powershot A460 to automatic mode and took photographs outdoors. When I see the to-be-photographed area on the LCD, it appears normal; but when I take a picture, the photo turns out ...
0
votes
1answer
113 views

image enhancement to read car plate

A group of thieves entered in my house and robbed a lot of my stuff. They used a car to run away. The following images were obtained from CCV cameras from neighbors. Is it possible to improve those ...
0
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1answer
31 views

Aperture of Photography [duplicate]

I am a beginner. Can anyone state what it means if anyone says "The aperture of the photo/pic is not correct."? I donot know what actually aperture means.
0
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3answers
212 views

Full frame or not? [duplicate]

I am struggling to decide between the 5D and the 70D as an upgrade to a 600D. I am an amateur photographer achieving pleasing results with my 600 and I have 5 good lenses. The kit (18-135) is an EF-S ...
1
vote
2answers
605 views

How to preserve image quality when exporting psd file to jpeg?

my psd file is 9900px by 6600px and I want to export it to jpeg for a website. When I try to export it to jpeg with 72ppi and lower down pixel dimensions to about 1000px by 750px, the image comes out ...
1
vote
2answers
184 views

How does Rokinon 24mm f/1.4 image quality compare between f/1.4 and stopped-down to f/4?

I have a Rokinon 14mm f/2.8 lens that I use as my go to for dark sky imaging with my full frame camera and it is amazing. However, I just bought a Rokinon 24mm f/1.4 lens for my crop sensor camera so ...
0
votes
1answer
128 views

Will a Fuji Finepix S4800 take much better pictures than my Galaxy S4 phone?

Which Camera will take better pictures? The one in my Samsung Galaxy S4 phone or a Fuji S4800 camera? I know the Fuji has better MP (16 vs 13) and much greater zoom but I am still wondering if I ...
1
vote
1answer
348 views

What colour space does Adobe Lightroom use in the Develop Module?

What colour space does Lightroom use when you load an Adobe RGB or SRGB tiff/jpeg file into the Develop module? The reason I ask is because I was told that the develop module always uses the ProPhoto ...
34
votes
8answers
4k views

Do megapixels matter with modern sensor technology?

Are more megapixels good? Are more megapixels bad? Do more megapixels increase detail? Do they make my images sharper? On the other side, is there a point that is too much? Do megapixels cause ...
3
votes
1answer
622 views

How does the resize option 'bicubic auto' in CS6 incrementally upscale images?

It's been demonstrated that upscaling incrementally improves image quality, Empirical Study: Extreme digital upscaling, and that thread also shows that choosing 105% increments versus 110% increments ...
4
votes
5answers
889 views

How can I resize more than 2GB of travel photography with no quality compromise?

I have more then two gigabytes of travel photography. Each image takes up than 4 to 5 megabytes. I have to send them to some one. How can I resize all images while retaining high image quality?
0
votes
0answers
42 views

Should I buy the Nikon 18mm-300mm / 18-200mm or 55mm-200mm / 55-300mm? [duplicate]

This question could be a duplicate but my point is completely different from it. I have just started to use a Nikon D3300 with the 18mm-55mm kit lens. Now, I want to upgrade to the 18mm-300mm but ...
0
votes
1answer
25 views

How to Choose Light mode while using Mobile Camera?

Which mode is best fit to take pictures at dusk using a mobile camera,will auto mode work fine or something else. For your information: I use a moto-e and Nexus 4 as my camera. and i use the default ...
3
votes
1answer
226 views

RGB colour correction of CCD camera images [closed]

I've developed an application which is able to communicate directly with a CCD camera (unbranded and obscure) and I'm able to capture and store the image from this camera. When the image is first ...
0
votes
2answers
252 views

Picture quality of a nice point and shoot with same size sensor and same zoom range as an interchangable lens camera

I'm trying to figure out whether I should get a camera with an interchangeable lens or a point and shoot that seems (based on the specs) very similar and the same price. The two in particular I am ...
5
votes
6answers
31k 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 ...
24
votes
2answers
3k views

What characteristics make a lens good or bad?

When reading lens reviews on the Internet, I often find subjective statements about the image quality that a lens produces, such as "good contrast" or "sharp". The problem is that I don't think I am ...