Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
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Image quality describes how well a photograph matches a perceived technical ideal.

learn more… | top users | synonyms (1)

4
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1answer
153 views

How do I compare camera signal-to-noise ratio based on camera sample images?

I want to choose a camera with the best signal-to-noise ratio within my budget. I want to ignore producer's marketing BS and reviewer's presumptions that "something's really cool". I know about ...
4
votes
0answers
85 views

How does the digikam quality sorter work?

I'm not quite sure this is the best place to ask, but there is a digikam tag, so I think it is not off-topic. I'm trying to use the digikam quality sorter, but I fail to understand how it works. The ...
4
votes
0answers
120 views

Halos on images taken with a Panasonic Lumix DMC-FS35 [closed]

Every image I take with my DMC-FS35 shows a halo around the subject. (See below) This is true in all light conditions with or without flash. INSERT IMAGE HERE
3
votes
4answers
2k views

How viable is copy pasting a professional's settings so that a noob can produce high quality photos?

How viable are "photography templates" where a professional gives the exact settings to use in a specific set up (say afternoon natural daylight at the beach, 50mm lenses with 3.5f at 3ft distance ...
3
votes
7answers
10k views

Is there an IQ gain from Canon's 18-135 to 24-105L?

Just got a Canon 40D body, and was about to get Canon's 24-105L lens. I hear people raving about the lens, and it all made sense until I saw a Cameralabs' review of the lens. So don’t buy the EF ...
3
votes
3answers
973 views

What's a good lens for my Canon G7?

I'm not a professional photographer, but I use my camera on a regular basis to photograph my familiy and activities I attend. I own a Canon G7 (older version of the G11) and instead of upgrading to a ...
3
votes
3answers
726 views

How can I improve these photos of porcelain tiles?

We are opening a new shopping website for bone china products. I was given some photos of porcelain tiles but they look much worse than they are in real. I wonder if there are any basic techniques ...
3
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2answers
347 views

The Lowdown on Image Quality on DSLRs

I have seen sites that use measure DSLR performances with Image QUality (in numbers). So I was thinking, given a D800 and a D7000, with the same lens, the same lighting condition and many other ...
3
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2answers
407 views

How many megapixels are needed on a smartphone to take above quality photos?

Just regular above quality photos for Facebook and normal things.
3
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2answers
1k views

Is it possible to combine multiple cameras for improved detail?

I'm a novice to photography and I'm wondering if its possible to combine multiple cameras to get a greater level of precision? I'm thinking that if you capture more light you should be able to ...
3
votes
3answers
1k views

How does the Lensbaby Scout perform as a cheap fisheye lens?

I'm interested in the Lensbaby Scout since it seems like a cheap fish-eye option, but I am unsure how it performs. What about the lens's quality (build quality, image quality, and optical quality)?. ...
3
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5answers
165 views

Can the specs for a digital camera indicate to me the color quality before buying?

Is there an item in a camera's specifications that can indicate the quality of color reproduction in that camera? There are a lot of things you can find out about a camera before buying from reading ...
3
votes
1answer
3k views

Motorola Razr Maxx compression removal

I've recently acquired a Motorola Razr Maxx. I had hoped its camera would be good for those random shots of opportunity, but unfortunately its quality seems crippled by overzealous JPEG compression. ...
3
votes
2answers
10k views

How to improve quality of pictures that are already taken (if possible in GIMP)?

I'm not a photographer but a graphic designer. In GIMP, I only discovered two methods of improving the quality of an photo: Filters > Enhance > Unsharp Mask Noise > HSV Noise Basically, ...
3
votes
1answer
303 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 ...
3
votes
2answers
943 views

Is there a set of common criteria for evaluation of photographs?

Is there any set of criteria for evaluating a single picture that is in common use? I have the following situation: I want to write down my criteria on how I rate my pictures. At the moment I give ...
3
votes
1answer
450 views

Clearer - Sharper images reducing noise?

I would like to make my images 'sharper' / 'clearer' with more detail and color and was wondering if this if more of a Equipment issue or rather more of processing the images with different ...
3
votes
2answers
2k views

If I'm happy with the speed, do I really need a faster class 10 or 30MB/s card for my DSLR?

My camera came with 4GB class 10, 30 MB/sec card. I wanted to upgrade to high capacity memory card but I was skeptical, a lower speed card such as class 10, 20MB/sec will cripple my camera when I use ...
3
votes
2answers
570 views

Are there objective tests showing the the impact of a lens hood on image quality where there is no obvious flare?

I am familiar with the function of a lens hood, and I can understand that they could help to improve the contrast of pictures. However, I'm not convinced whether a lens hood does make all that much of ...
3
votes
2answers
738 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 ...
3
votes
3answers
601 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 ...
3
votes
2answers
433 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 ...
3
votes
2answers
392 views

What is the difference between a very expensive flash and a average priced flash?

Let's say between a Profoto B1 flash and a Nikon SB-910 flash. I understand flashes have TTL, HSS, Output power, etc., that makes them different, but let's say in a completely equal scenario that a ...
3
votes
1answer
70 views

Adequate PPI for 12' by 5' banner

I'm looking to print a 12' by 5' banner. Got a photo taken with Nikon D600 in RAW format. But because photo needs to be cropped somewhat, after importing it to Illustrator and resizing, the image ends ...
3
votes
2answers
9k views

Reasonable file size for printing high quality photography as A3 posters?

I bought some photos and need to send them off for printing. The printing company asked for the final files to be in PDF format, so I've converted them using Illustrator and Photoshop. I also added a ...
3
votes
3answers
862 views

Can you tell how effective a camera's high ISO images are from the specs?

My current camera, a Canon 50D has OK image quality at 1600 ISO and its not really very usable above that. I know that all the manufacturers publish an ISO range for their bodies. But just because ...
3
votes
1answer
3k views

How do the Pentax 18-55mm and 18-135mm compare in image quality?

I've been reading a lot about the Pentax DA 18-135mm lens and its performance compared to other lenses. I've heard that this lens is very soft at 135mm regardless of aperture. However, I've also ...
3
votes
1answer
119 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 ...
3
votes
1answer
967 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 ...
3
votes
1answer
726 views

Noisy images from Canon PowerShot SX150 IS

I purchased "Canon PowerShot SX150 IS Point & Shoot 12x" around 9-10 months ago. I was satisfied with image quality. But from last 3-4 months, it is not able to snap good quality pictures as it ...
3
votes
1answer
609 views

How can I get objective, numerical Image Quality measurements for my photos?

I intend to take some raw images using my Canon-450D, and process them offline using some tool. Then I need to get some objective(numerical) metrics for those images like Image Noise, Image ...
3
votes
3answers
208 views

Does a full frame with a teleconverter perform better than an APS-C without a teleconverter?

Context Putting a teleconverter on a full frame lens magnifies the center of the lens but gives more reach due to that with some drawbacks. I've rediscovered focal reducers that do the opposite, ...
2
votes
3answers
485 views

Does the higher price lens always reflect better quality regardless of it being 3rd party or not?

When looking at various lenses you will see the camera manufacturer lenses made by the camera manufacturer. Then you will see other 3rd party lenses (Tamron, Sigma, etc). Does it pay to get the ...
2
votes
6answers
679 views

Why are some photos sharp in the center, but soft on the edges?

I have seen many photos which are quite sharp in the center, but soft on the edges. What is the reason for this, and how can I prevent it? My first guess is that it has to do with the lens. EDIT: ...
2
votes
1answer
986 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 ...
2
votes
4answers
10k 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 ...
2
votes
2answers
1k views

Can ultra-high ISO ever yield good results? [duplicate]

Possible Duplicate: Is high ISO useful for photography? My camera can apparently extend to really high ISO's, however I see serious noise over 2,000 ISO at any shutter/apeture combination. ...
2
votes
2answers
494 views

Good compromise on quality/compression for hi-rez photographs?

My Nikon D90 dumps out photographs that are 4288 x 2848 @ 300 DPI. They're about ~3 MB in size. I'm an amateur in every sense of the word. I don't know what 75% of the camera settings do. I'm ...
2
votes
2answers
165 views

Why do white flowers always have a weird surrounding “glow”?

I have been trying to take pictures of dogwood blooms for a week now. I have the sharpness I want, but the flowers have a weird glow to them. The only post I could find about it is this one. Everyone ...
2
votes
7answers
988 views

Why do these images taken at significantly different ISO appear equal in quality?

How come I can't tell the difference in quality of these two photos, even though one is shot at ISO 160, and the other at 1600 ? Note: EXIF data has been stripped from images below by imgur saving ...
2
votes
3answers
245 views

Can you match a photo to the discrete camera it was taken with, without metadata? [duplicate]

Are there enough digital and/or analog difference in individual cameras/houses/lenses that photos will have fingerprint of sorts? For example discoloration of pixels, distortion from aberrations on ...
2
votes
3answers
1k views

How many filters can you stack?

The rental store only has 16X (4-stop) ND Filters, and I'd ideally like to get at least 8-10 stops of filtration. How many filters can I stack on top of one another before the image starts to ...
2
votes
2answers
137 views

Which is the factor that creates noise in a photo? [duplicate]

Possible Duplicate: What is noise in a digital photograph? This happens while talking photos on dark or night. The Black color is not black, it has some noise. What would be the reason for ...
2
votes
3answers
5k views

Should I use “Super Fine” or “Fine Quality” setting on Samsung S1050 camera? [duplicate]

I have a Samsung S1050 camera. There are three quality settings - Super Fine, Fine and Normal, which I believe relates to the JPEG compression level. I have mainly used Fine in the past, but wonder ...
2
votes
1answer
13k views

Image Quality of Canon 18-135 IS compared to 28-135 IS USM?

I have the Canon 28-135 IS USM lens and I am pondering replacing it with the newer 18-135. I know I'll be giving up the USM and FTM focus and gaining 10mm on the wide end (replacing my old kit ...
2
votes
2answers
136 views

Why does my low key photo look pixelated on online services?

I captured a low key RAW photo with my Nikon D5100. I processed it using Lightroom, exported it as a JPG and then set it as my Facebook profile picture. Despite the initial JPG looking good, the ...
2
votes
2answers
389 views

What is meant by Subjective Image Quality (SQF)?

What does the SQF result in the Imatest Documentation mean? I don't understand the graph showing SQF against Picture Height. How should I calculate SQF value for the camera being tested. For example, ...
2
votes
2answers
154 views

How does a glare arise in images?

I know am sounding dumb but i have not been able to find a correct definition of glare What are the reasons it props up into images For example am taking a photograph of a fruit in diffuse light : ...
2
votes
1answer
87 views

Are there significant image quality differences between similar small sensor cameras?

My now old compact camera died of a lens failure, so I'm in the market for a replacement. What I'd do if I were looking for a new SLR/mirrorless-esque camera would be to go and read the thorough ...
2
votes
2answers
113 views

How to retain the most data for editing?

I have started a bit of astrophotography, an important part of which is the editing of the image to bring out stars etc not even visible after a ~40 second exposure. To do this the image must retain ...