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

learn more… | top users | synonyms (1)

3
votes
2answers
241 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 ...
0
votes
1answer
63 views

Why are my Sony DSC H300's images good on the camera, but poor on the computer? [closed]

I bought a new Sony DSC H300 camera. Each time I upload images to my computer the picture quality shows a big change. The picture quality on the camera is good, but the picture quality on the computer ...
0
votes
0answers
52 views

Is there a meaningful image quality difference between the Canon Powershot SX410 vs SX510?

Can you show me a picture difference between the Canon Powershot SX410 and the Powershot SX510? Is there a noticeable difference between 12 megapixel and 20 megapixel here? I want to buy one of these ...
-2
votes
3answers
137 views

What is the best resolution and quality for website [duplicate]

I'm thinking the pictures on my website are too large and heavy. I was looking for the best resolution and quality to export my pictures. I found some information that says 72dpi is enough resolution ...
2
votes
1answer
48 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 ...
1
vote
2answers
78 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 ...
3
votes
3answers
1k views

Why do different smartphones with the same megapixel camera resolutions have different quality of image?

There are different brands of smart phones available. Frequently two different big brand smart phones (Nokia, Samsung , Apple, Sony etc.) with the same Megapixel count have a different quality of ...
3
votes
1answer
79 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 ...
1
vote
4answers
184 views

How can I compare different lenses in terms of quality?

I am currently looking to buy a new lens to replace with kit lens, having an extra reach, faster, better image quality and also better video quality. Without buying all the lenses I have shortlisted, ...
0
votes
1answer
102 views

What causes chroma noise in an image sensor

I'm trying to understand what is causing chroma noise in an image sensor, specifically why it is so visible when the ISO is set to a very high value (which for CMOS I guess means that there is an ...
1
vote
1answer
110 views

Imbalance in green pixels

Question in brief: at a sensor level what are the typical causes of an unequal response between adjacent green pixels? Background: I'm experimenting with a sensor, which is typically deployed in the ...
0
votes
2answers
63 views

Why is my Sony A57 creating low res JPGs?

I have used a Sony A57 since they became available. I always have the resolution set for 16M and FINE for JPEGs. I just took an important set of photos that were intended for large blow-ups. But ...
1
vote
1answer
79 views

Does sensor type affect image quality? [duplicate]

I've recently discovered snapsort.com and use it to compare other cameras with the one I own. When comparing Pentax k10D with the K-x model I learned that the K-x has a CMOS sensor and that ...
2
votes
5answers
97 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 ...
1
vote
1answer
99 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
90 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
votes
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
votes
0answers
57 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?
1
vote
1answer
120 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
votes
1answer
106 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 ...
3
votes
3answers
274 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 ...
0
votes
2answers
114 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, ...
3
votes
2answers
241 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
0answers
56 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
votes
2answers
78 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
votes
1answer
135 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 - ...
-4
votes
1answer
152 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
votes
1answer
44 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 ...
6
votes
1answer
174 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 ...
4
votes
2answers
760 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
782 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
votes
0answers
117 views

What is the difference between edge detection, Sobel detection, and Canny detection?

What is the difference between edge detection, Sobel detection, and Canny detection
21
votes
10answers
10k 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 ...
0
votes
2answers
247 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
155 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
190 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 ...
0
votes
1answer
129 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
votes
1answer
32 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.
1
vote
2answers
1k 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 ...
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 ...
0
votes
1answer
167 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
519 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 ...
0
votes
0answers
46 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
31 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
239 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
294 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 ...
7
votes
2answers
2k views

Make photos on Facebook nicer?

I upload photos to my Facebook page using the latest Lightroom. I'm wondering if there are some tips or tricks, or maybe hidden options on Facebook that makes the images served to the viewers higher ...
1
vote
5answers
350 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 ...
0
votes
1answer
137 views

What are the extra features offered by a higher end model camera body?

The role of a lens is pretty clear for a nice sharp image, but how much does the camera body matter? What are the extra features offered by a higher end model? How much difference do they make?
1
vote
2answers
240 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: ...