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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
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
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
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
votes
1answer
247 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
772 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
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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
539 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
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2answers
9k 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
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2answers
499 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
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1answer
411 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
3answers
300 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
262 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
263 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
60 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
7k 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
689 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
2k 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
81 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 ...
3
votes
1answer
739 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
664 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 ...
2
votes
3answers
444 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
1answer
840 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 ...
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2answers
394 views

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

Just regular above quality photos for Facebook and normal things.
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4answers
7k 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
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2answers
892 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
469 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
5answers
101 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 ...
2
votes
7answers
945 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
209 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
630 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
131 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
4k 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
11k 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
330 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
153 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
56 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
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 ...
2
votes
1answer
154 views

What are the caveats for buying a teleconverter that is of a different brand than the lens?

What are the caveats when choosing a teleconverter brand that is of a different brand than the lens it will be attached to in attempt to maximize image quality? Lets assume the following to make the ...
2
votes
1answer
959 views

Setting custom picture control in Nikon D3100 DSLR?

How to create custom picture control in Nikon d3100 dslr's? I have tried with my Nikon 3100 without success, I don't know how to do it.
2
votes
1answer
808 views

How to measure the image quality of a DSLR camera [duplicate]

How do we compare the image quality of two cameras? Do we have some tangible parameters to make such an assessment, and what are the main aspects of the image which contribute to image quality? Is ...
2
votes
1answer
662 views

Image being corrupted in DSLR [duplicate]

Possible Duplicate: Why do my images get distorted on my Nikon DSLR? I have been shooting with my D90 for quite sometime and I have just encountered the following problem. What could have ...
2
votes
1answer
534 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 ...
1
vote
3answers
555 views

Lack of sharpness / focus in low light

I recently was playing around with my camera (Canon 60D) in a low light situation trying to focus on some subjects across the room. I noticed once getting home and getting the images onto the computer ...
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vote
5answers
378 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
530 views

Am I being unrealistic about image quality expectations from Canon 70-200 F/4 USM IS L Lens?

I'm shopping for a 70-200 F/4 USM IS L, and took a few test shots with it. Here's a full resolution jpeg, and a 100% crop with a focus point highlighted. It was shot handheld with IS on at 70mm / F4 ...
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3answers
194 views

Can you take a picture of a faded docket and see the details again in computer?

Hi I have a very faded docket, where I can still read the details with bare eyes, but when I tried to photocopy and scan it, it just gave me a white docket. My last hope is using a camera. Please tell ...
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vote
4answers
209 views

Low quality photos even at superfine mode

I just purchased a Canon Powershot SX240 HS. I took a few pictures indoors (with the lights on as it is dark outside) and I am unimpressed. Zooming in on this on my PC, I can see they're grainy and ...
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3answers
719 views

Are there software (preferable freeware) that can judge the quality of a photo (jpeg / raw format)?

I was wondering if there are any freeware that is able to judge the quality of a photo (can be a jpeg or raw format) and give a score to it? I kind of sick of comparing photo taken by different ...
1
vote
3answers
92 views

How can I get everything out of 120 film?

I've just begun shooting 120 film in a 1956 Yashica Mat LM. I'm new to film photography, but I know that 120 film is supposed to have the equivalent resolution to a 100 megapixel sensor. Most film ...
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2answers
245 views

Grainy/low quality pictures - how to stop?

I recently got a Fuji S8200 (bridge) camera and I just can't seem to take a decent photo with it at all, and I'm not sure what I'm doing wrong. Here are some examples: ...