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Questions tagged [image-quality]

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

3
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2answers
642 views

Filter for RGB separation and its effect on the image

Looking at Bayer filter of a typical consumer camera, one can easily see that sensitivity of the filter for each color is all over the place. Are there filters similar to Bayer that do a better job at ...
10
votes
8answers
5k views

“Optimal” size of a JPEG image in terms of its dimensions

I plan to write a script that will scan 100,000+ JPEG images and re-compress them if they are "too big" in terms of file size. Scripting is the easy part, but I am not sure how to categorize an image ...
3
votes
2answers
71 views

How can I simulate JPEG quality degradation? [duplicate]

I am writing a report about file formats in images & their properties. In the report I want to talk about how file formats have lossy compression rather than lossless compression & I wanted to ...
9
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5answers
2k views

Are there standards for 5 star rating scales of photos?

I'm preparing to go through thousands of photos and organize them and part of that is to give each one a rating of 1 to 5 stars. This has me wondering, has anyone developed a set of recommended ...
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3answers
3k views

the best way to improve image sharpness on Canon 700D

I'm currently using a Canon 700D with a few EF-S lenses, I like the Canon system, the looks, feel and ergonomics but I'm not happy with the files I'm getting. Whenever I come across a photo that ...
7
votes
1answer
779 views

How does the digikam quality sorter work?

I'm trying to use the digikam quality sorter but I don't know how it works. The documentation I found that most looks like a tutorial is an almost 1-year old unaswered question on the digikam user ...
10
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4answers
37k 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 you,...
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1answer
78 views

Picture I take in low light using yougnuo 580ex comes out like this that its upper bright becomes bright and lower comes out to be totally black? [closed]

How to take proper picture by using external flash?what is the mistake I did in capturing picture I'm a noob in photography I have nikon d5300
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2answers
73 views

Does OIS in some cases reduce the quality of the picture (softness, vignetting, loss of contrast…)? [duplicate]

I always take pictures with optical image stabilization enabled (except if I take long exposure shots with a tripod), but I was wondering if OIS could (in some cases) reduce the picture quality. OIS ...
0
votes
1answer
88 views

How to print a very small design (35 microns) [closed]

Trying to print a very small design (smallest side is 0.035 millimeters). The accuracy is very important, even though this is not readable by normally sighted person's naked eyes. Tried printing on ...
-3
votes
1answer
223 views

Which picture has better quality? [duplicate]

I have two exact same pictures and they are both the same x:y size. But one of them is 105 KB and the other one is 109 KB. Which of them is of better quality?
1
vote
1answer
129 views

How big can you print a canon 5d iii Image? [duplicate]

I am new into photography as a business, one of my customers have asked if they could get an A2 size print. My question is, will an A2 size print be clear enough from a canon 5d iii image (No Crop).
4
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3answers
143 views

Do different smartphone apps create different raw pictures?

Androids camera-2 API supports taking photos in raw format (dng for my Nexus 5) with an appropriate camera app. Since there are different apps I could use, I'm wondering if the raw picture data ...
1
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2answers
78 views

200mm on 48MP body (with 2x digital zoom) vs 400mm on 24MP body

Is the "quality" from a 200mm lens on 48MP body (after a 2x digital zoom) going to be same as one on 400mm on 24MP body? Assuming the same apperture
0
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2answers
75 views

what technology does Nikon use to reduce moire?

Nikon cameras do incredible job with moire effect even that nikon cameras do not have anti aliasing filter.And i didn't find moire in any situation with my Nikon d7100
0
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1answer
88 views

What is considered a good quality for consistent white balance in a flash/strobe?

Looking to buy a flash/strobe and can't tell if 5600k ± 200k is considered good or bad quality. I can imagine using 2 strobes from the same manufacturer and getting a difference of 400K, which could ...
1
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1answer
72 views

How to reduce haze while photographing lost distance mountains? [duplicate]

When I go hiking I noticed that sometimes the photos have a noticeable amount of haze, especially when photographing long distance mountains. I think this is a natural phenomenon due to air ...
5
votes
6answers
797 views

Do negatives scanned upside down lose quality?

I'm a novice, and don't have a detailed understanding of the technical terms, but I've scanned hundreds of 35mm and medium format negatives to get the best quality RAW files at certain presets which ...
1
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2answers
149 views

Can bit rot cause degraded image quality and flickering?

The photos on my computer seem to have degraded in quality since having been uploaded to my computer, and would sometimes have a flickering strobe effect, which would disappear if I restarted the ...
1
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0answers
65 views

What inkjet printer specifications to look for to produce best quality print [closed]

Im new to printing and all these terms from printer specifications are extremely confusing; dpi, ppi, dpp, amount of colors, droplet size, etc. Why is the maximum dpi on printers decreasing and ...
1
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2answers
82 views

What should I do to best take a digital photo of an old photo print?

My father just signed up on Facebook last week. Now that he's looked at his friends' walls / pages posting old photographs, he wanted to do the same. I have been helping him to use the smartphone (and ...
6
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2answers
1k views

Does converting image file formats affect quality?

Does converting image formats, such as from JPG to PNG, have any effect on image quality? I know converting from RAW to JPG has disadvantages, but what about other format conversions?
3
votes
2answers
97 views

What factors affect the detail and clarity of a photo taken by a digital camera?

By clarity, I mean to preserve as much detail as possible when zoomed in. For example, I take a photo of my cat 10 meters away, and I want to zoom in and able to see each single fur as clear as ...
16
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6answers
5k views

Why is this smartphone picture better than this dedicated camera picture?

The other day I went hiking through a mountain in west Tokyo to take wilderness pictures for reference for the new videogame I'm working on. For the past few years, I've only relied on my smartphone ...
1
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2answers
135 views

Picture quality when posting pictures on social media

I've been taking pictures of my self or my family with my camera for quite a while now, and i normally use those pics on social media, but the thing is... the pics are so heavy that it takes too long ...
1
vote
3answers
84 views

Professional photo to pop-up banner

The company I work for is wants to order this 10ft banner for a trade show: https://www.postupstand.com/all-products/led-and-digital/lightbox-displays/10-lux-seg-backlit-pop-up-display.html They ...
1
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2answers
168 views

Trying to understand losses in jpg compression

I have a bunch of jpegs taken with a Nikon D3200 at 6016 x 4000. They weigh between 9M and 12M each. To try and reduce space a bit, I compressed copies with the default Windows utility, and the new ...
4
votes
1answer
304 views

Why are test images from my Fujifilm X100F softer than I expect?

I just got a copy of the X100F, and I was really excited to play around with it. But as I've taken a handful of pictures in various settings, I've noticed that the sharpness of the images were not ...
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votes
1answer
58 views

Whatever Megapixel camera in phone - photo taken should be what we set megapixel in app? [closed]

Is it possible to set exact mp in mobile camera app example- like i have mobile device with 4mp, 8mp, 12mp camera and i want to capture image in 12mp camera but during capture camera understand only ...
2
votes
2answers
112 views

How to test image quality with a camera that is focused to infinity?

I have to test a camera that is focused to infinity, but I cannot take an image of an object that is more then 1.5 meters away from the camera because I can't get it out of the room itself. (The room ...
1
vote
2answers
177 views

What image/camera/lens quality metrics are relevant for resolving human subjects?

I am attempting to gather data for creative historical purposes. However, I'm a computer scientist, not a physicist or a photographer, and there seem to be a gazillion considerations. The environment ...
3
votes
1answer
414 views

How much does the Canon EF 1.4x III Extender affect image quality on an APS-C sensor?

To be more specific I am interested in buying the Canon EF 1.4x III Extender to use it on my Canon EF 70-200 f2.8L IS II USM mounted on my Canon 7D Mark II. I know that when using the extender the ...
2
votes
0answers
110 views

Why aren't dct quantization tables symmetrical [closed]

Many image compression standards use the DCT transform to convert spacial data into frequency data. The DCT coefficents are then quantized based on the estimated importance of a certain frequency to ...
1
vote
3answers
171 views

Assuming no editing, what's the difference between in-camera jpegs and lightroom jpegs? [duplicate]

I have a Canon 6D. I usually shoot RAW + JPEG. I shoot RAW so I have the option to edit, but I don't actually edit most of my pictures. I've noticed that if I just import into Lightroom and export ...
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votes
2answers
250 views

Do photos from the iPhone 7 lose quality over time?

The pictures taken on my iPhone 7 camera have low resolution and a grainy quality. I don’t remember it always being like this.
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votes
1answer
111 views

a general account on parameters of a camera; which are innate, which are derived, which can be processed later, etc [duplicate]

So we all know there are 3 golden parameters in camera: aperture, iso, shutter speed. I could sense those 3 parameters are innate, which means they are directly related to the mechanics of the camera, ...
-1
votes
1answer
187 views

What are Olympus' best in-camera Jpg settings for facebook

I usually shoot raw and make minimal in-camera post-processing with my O-M10 Mark II before exporting the photos to Facebook. Did anyone figure out what are the best in-camera jpeg resolution and ...
6
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2answers
2k 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 ...
0
votes
1answer
70 views

Quality from camera to phone

If a picture taken with canon rebel t6 is sent to my Android phone, will it look the same printed from my phone vs the sd card from camera. Want to have a picture printed to canvas, originally taken ...
18
votes
3answers
4k views

Are online photos safe from damage?

The photos on one of my Facebook accounts seem to have lost a significant amount of resolution after they had already been posted. This account has other issues, for example, my timeline review is ...
1
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2answers
185 views

What are the Focalreductor/Speedbooster differences?

I have my grandfathers set of Canon FD lenses (among the most fun are a 50mm f/1,4 SSC, a 28mm f/2,8 SC, and a 200mm f/4 SSC) and a full set of filters for the same mount. So wanting to mount it on a ...
16
votes
3answers
3k views

If I want to shoot darker shots, is it better to increase the lighting and then darken in post to retain clarity?

I'm just getting started - in my last shoot, I was using a 6D with a 50mm/1.4. In low light, the pictures looked fantastic on the viewfinder but on the computer screen, appeared extremely grainy. ...
5
votes
6answers
9k views

Why does the quality of my pictures lower the more I zoom in?

I have a Canon 60D with the 18-200mm kit Lens. I was at the beach not too long ago, I took some pics of my son in the sand, from a very close distance and they came out great. Picture quality was top ...
2
votes
3answers
149 views

What do I need to change to prevent this denim looking grain/noise in my product photos?

I'm an amateur and I'm reading everything that I can to learn how to take decent product photos and get the best out of the equipment that I have... My question is specifically, what is likely causing ...
2
votes
2answers
600 views

What should I expect from Canon EF 24-70mm f/2.8L II USM?

What should I expect from Canon EF 24-70mm f/2.8L II USM? Hey guys, I'm a noobie around here so I hope I don't annoy too many of you with this question. At the moment I have a Canon EOS 80D and ...
0
votes
2answers
12k views

How do I set up my camera to get a high enough resolution for printing at 300dpi?

How do I get the highest resolution my camera can take a photo at? I want to be able to have a picture as Photoshop-ready as I possibly can. For example, if I need to upload high resolution art at ...
0
votes
1answer
125 views

Should i buy a lens or a new camera? [duplicate]

I have a sony dslr camera thats about 10 years old, it doesn't take as good quality photos as newer cameras. I want to know if i should buy a lens or a new camera. What affects the quality more?
0
votes
2answers
105 views

Image quality criteria in low light

I am using Gsmarena photo camera comparasion tool and I compare iPhone 6s plus and iPhone X in low light. Why iPhone 6s plus looks much better and less noisy compared to iPhone X while iPhone X has ...
3
votes
2answers
99 views

How large can I print an old illustration?

quick question. I've got a bunch of illustrations from the 1400's-1500's, and I would like to know how to figure out how large I can print this on art paper. The purpose is for art prints, they're ...
-2
votes
1answer
59 views

How can I measure a new high dynamic range image tone mapping operator for performance or image quality? [closed]

I made a new operator for tone mapping, and I need to know it's efficiency (image quality) compared with other tone mapping operators.