Image quality describes how well a photograph matches a perceived technical ideal.
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7answers
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Photographic techniques to avoid chromatic aberration?
I've read several informations here on Photo SE, as well as the wikipedia article on CA.
I understand that it is inevitable that some amount of chromatic aberration shows up for a particular lens, ...
6
votes
4answers
342 views
Are there any comparison photos of different lenses (with the same camera and scene)?
I've heard claims ranging from "higher-quality lenses only make a noticeable difference for scientific applications and super-huge prints," to "even the difference between high-quality and ...
34
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3answers
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What is moiré? How can we avoid it?
What is the image defect called "moiré"? What causes it, and how can we avoid or reduce it? Is it related to "false color"?
8
votes
5answers
2k views
Can anyone recommend *freeware* to reduce motion blur by deconvolution?
Can anyone please recommend free (preferably also portable i.e. no need to install) software for Windows XP or later to improve image quality of large (12 megapixel) terrestrial (not astronomical) ...
0
votes
2answers
73 views
Saving as PDF with JPG compression vs saving it as JPG
I am creating a booklet with a hight resolutio (more than 4800 pixels height) and I am about to print it.
My question is, what is better in terms of quality:
Saving each page as a PDF with JPG ...
4
votes
1answer
116 views
What characteristics make a digital sensor good?
Generally, the technical image quality of a digital image (before we get to the post-processing stage) is the product of the characteristics of the lens and the recording medium, with an important ...
2
votes
1answer
141 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 ...
5
votes
2answers
177 views
How does an anti-alias filter affect image quality other than reducing Moire?
The commonly stated trade-off for using an anti-alias filter or not is that it diminishes the risk of moire while also reducing potential sharpness. This is what I have seen myself and in many online ...
8
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2answers
1k views
Does rotating a photo count as a destructive editing?
I usually rotate all my jpg photos (using Windows Photo Viewer) after removing them from my camera's card. Is this correct? Am I losing quality for rotating them? Should I just leave them as they are ...
7
votes
4answers
375 views
What does IQ mean?
I see a lot of questions which mention IQ. The only meaning I know outside photography is "intelligence quotient" but obviously IQ has some other meaning here.
IQ is used for example in
"Lens with ...
1
vote
1answer
64 views
Optimal JPGs resolution out of a Point & Shoot camera for storage size and quality? [duplicate]
Simple point & shoots don't produce RAWs, they produce JPGs. Let's assume you have a modern P&S which shoots 16 megapixels maximum in Super Fine, Fine and Normal JPGs.
First side question is ...
2
votes
3answers
547 views
Lens with small scratches on the front element - how do they affect IQ?
I am looking to buy a CANON 28mm 1.8 EF lens. I found an offer, significantly discounted, of a lens with small scratches on the front element.
The offer is very tempting. Here is a photo posted by ...
2
votes
3answers
301 views
Image quality when using the same lens on 16Mpix vs 24Mpix
I'm considering buying a new camera and my two candidates are Nikon D7000 and Nikon D7100. I heard that 24Mpix sensor needs very good lens to produce sharp images. Considering that I currently have ...
5
votes
2answers
349 views
Is this the level of sharpness and detail I can expect from a Nikon D7000 and 18-105mm lens?
Being a newbie, I would like to have some comments on my current skill level and quality of my current equipment. I own a Nikon D7000 with 18-105. I am not very much satisfied with the quality of ...
1
vote
2answers
60 views
Canon a2300 resolution problem
I have Canon Powershot a2300.
It was working fine till yesterday but i dnt know what settings have been changed to reduce the size of the image. Previously images sizes were about 4mb now it is kb's ...
9
votes
7answers
3k views
Why does using flash sometimes create these white spots in the photo?
I have an Olympus FE-190. When I take a picture, with flash on Digital Image Stabilizer (DIS) mode, I get white spots in pictures. This doesn't happen always.
There is only an option called Pixel ...
0
votes
3answers
202 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
3answers
264 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 ...
15
votes
6answers
3k views
What are jpeg artifacts and what can be done about them?
I know JPEG is a "lossy" compression algorithm that discards information in order to save space. What is the visual impact of this? I've heard of "JPEG artifacts". What do these look like?
Are there ...
9
votes
2answers
620 views
What characteristics make a good lens good?
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 ...
0
votes
3answers
162 views
Would you use an online RAW image processing application? [closed]
I'm just curious, if there was a web-site/web-portal related to RAW image processing what features you would prefer to use on it:
RAW image processing (from different Cameras)
Implementing different ...
3
votes
1answer
371 views
How to show Sony NEX F3 image quality is better than Nikon 1 J1?
According to this site, Sony NEX F3's sensor is 3x as large as Nikons, and it's image quality is 73 vs Nikon's 56 (how on earth do you come up with a number for this?). I have been experimenting with ...
7
votes
2answers
157 views
What does it mean to excite aliases?
I recently came across the phrase 'excited aliases.' The phrase seems to be related to lens sharpness in some way. While a web search turns up the phrase a few times, I am unable to locate a decent ...
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vote
1answer
116 views
Is the size of the rear opening of a lens related to image quality?
I purchased a Sony NEX F3, and it came with a 16mm lens and a 18-55mm lens. It seems to me that the 18-55mm lens produces better picture.
Does the bigger lens opening in the 18-55mm lens produce ...
7
votes
3answers
1k views
How can these photos have so high quality?
Today, I ended up in a site showing famous people faces in a very first plane. I just got impressed by the quality those photos had.
What do you think are the factors you have to tweak to reach that ...
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vote
2answers
156 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 ...
2
votes
3answers
349 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
5answers
3k 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 ...
2
votes
2answers
95 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 ...
1
vote
2answers
535 views
Why isn't color from my Canon 550D up to my expectations?
I am using a Canon 550D and I am not satisfied with the image quality that it offers. By image quality I am specifically concerned with a general feeling of better color.
I have used different lenses ...
3
votes
1answer
267 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 ...
1
vote
2answers
359 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 ...
7
votes
3answers
540 views
Why are macros from my new DSLR no better than those from my P&S?
I have been using a 14mp point and shoot for a couple of years. I like to take macros of flowers, frost and bugs. I want to keep zooming in on my PC to see deeper into the flower, so I bought a 18mp ...
3
votes
2answers
2k 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 ...
16
votes
11answers
9k views
How does the lens diameter influence photo quality?
I have tested two different 50mm lenses in my camera. One was a Nikkor 50mm ∅52mm. The other one was a Sigma 50mm ∅72mm. I took some pictures with both lenses using the same setup for aperture and ...
4
votes
2answers
486 views
Are cropped images from a full-frame sensor equal quality to full APS-C images despite the lower resolution?
If I put a DX lens on a Nikon D700, it will reduce megapixels to 5.1.
I understand that FX pixels are about 2.5 times larger than DX pixels. Would I be correct to assume that, therefore, my FX image ...
5
votes
2answers
112 views
Favourable characteristics of robotics research camera?
I use Imaging Source CCD firewire digital cameras to capture video streams for use in robotics research. These cameras are reasonably priced and performance is (from my perspective) decent. ...
3
votes
2answers
285 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 ...
1
vote
1answer
61 views
what is meant by area sampling in graphics? [closed]
What is meant by area sampling in graphics ? I know it is an anti aliasing technique.
3
votes
3answers
283 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
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. ...
7
votes
2answers
1k views
Canon 50mm f/1.8 vs Canon 28mm f/1.8 (vs Sigma 30mm f/1.4)
I have the nifty-fifty and I am in love with the kinds of images it can produce, particularly when it comes to portraits. I really enjoy the lens, but I have one problem; it is a little bit too tight ...
-1
votes
2answers
160 views
How to reduce the image resolution to increase ppi?
Having an photo of 4000x3000 resolution with 240ppi. Is it possible get a resolution of 400x300 resolution but with higher ppi?If possible how to do that?
11
votes
8answers
1k views
Can a sharp picture with a kit lens plus post processing rival a “pro” lens?
If I am able to take a relatively sharp picture with a kit lens, and boost the vibrance and or saturation during post processing, will that picture be comparable to ones taken from an expensive ...
2
votes
1answer
221 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 ...
2
votes
2answers
192 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
437 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 ...
23
votes
18answers
1k views
What are some techniques for hand-held image stabilization?
My zoom lens (75-300mm) is fairly slow: 5.6 at its farthest point. (I think it's 3.5-5.6, and it's not image stabilizing. I'm on a budget, sadly!) Unfortunately, my primary use for it is hand-held ...
2
votes
2answers
316 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.
...
7
votes
1answer
272 views
What causes this bluish tint and other anomalies in this image?
I bought a Tamron CF Macro 28-70mm 3.5-4.5 lens on eBay for $35 AUD plus postage - cheap enough to give it a go and see what it's like.
I took a range of photos with my Sony NEX-C3 to get a feel for ...
