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Photography

Questions tagged [image-quality]

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

376 questions
info newest frequent votes active unanswered
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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 ...
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 ...
-2
votes
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
2
votes
2answers
74 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 ...
1
vote
1answer
131 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).
-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
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
votes
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
votes
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
vote
1answer
73 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 ...
1
vote
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
vote
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
vote
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 ...
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 ...
1
vote
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
85 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 ...
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 ...
-4
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 ...
3
votes
1answer
423 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 ...
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
178 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 ...
-2
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.
-1
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
188 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 ...
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 ...
16
votes
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 ...
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
vote
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 ...
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
604 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
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.
-1
votes
1answer
108 views

Programmatically assessing image quality [closed]

I am using a third party service which processes images and returns some metadata: The data (and ranges) looks like this sharpness 0-1 brightness 0-1 contrast: 0-1 dominant color: hex array of '...
0
votes
1answer
4k views

What are the differences between the Canon EF-S 18-55mm f/3.5-5.6 III and EF-S 18–55mm f/4–5.6 IS STM

I'm looking at these two lenses: Canon EF-S 18-55mm f/3.5-5.6 III & EF-S 18–55mm f/4–5.6 IS STM What are the differences between these two lenses, specifically in regard to overall image quality?...
4
votes
3answers
9k views

kB vs MB - will pictures be good quality

I recently had my sons newborn shoot done and the photographer has sent me all his images in kB, is this right as I have always received MB files from previous ones. Will the quality be ok when I go ...
4
votes
2answers
201 views

NIght Photography while at sea

My son is in the US Navy. He wants me to figure out which compact camera would allow him to take pictures at night while at sea of the stars, and bio-luminescence. Unfortunately, while he can use a ...
-4
votes
6answers
227 views

How do you explain to an inexperienced person how to take photos for you to make a panorama?

There are several inexperienced people that I need to take photos of rooms so I can create 360° x 180°-spherical panoramic images from them. The problem is, that they always misunderstand what to do. ...
-4
votes
2answers
120 views

Distinguishing Paintings from Photographs

Is there a simple, sure-fire, 100% accurate method one can use to distinguish paintings and other works of art from photographs? I am not asking: 'What is the difference between a painting and a photo?...
14
votes
11answers
9k views

Is there a noticeable difference in image quality between Micro Four Thirds and APS-C entry-level DSLR cameras?

I am thinking about either buying a Nikon d3400 (APS-C or an Olympus OM-D EM-10 mkii (M4/3). In principle I would prefer the Olympus, as it is much smaller and could fit in a jacket pocket. However ...
-4
votes
3answers
90 views

Troubleshooting an image [duplicate]

I have an image, below, that seems "soft" and I'd like to know why. Possibly it was resized from something like 3000 x 3000 and not sharpened. Possibly it's a 500 x 500 image, expanded to 960 x 960. ...
0
votes
2answers
602 views

GoPro Hero6 Linear mode

I am planning to buy a Gopro Hero6 camera for mainly taking still photos and occasional video. My reason for choosing Gopro is ease of carrying and using it while travelling. Although i have heard a ...
0
votes
3answers
204 views

What is causing the lack of sharpness in this picture? [duplicate]

What is the most likely cause of the lack of sharpness in this picture? Taken with a Nikon D3000 and a 55-200 lens at 200mm, 1/320s, f/5.6, ISO 400.
5
votes
5answers
2k views

Will a lens upgrade from the kit lens give me better colors on my backpacking travels?

I currently have the Nikon D5300 along with the kit lenses (18 - 55mm). I use it for my backpacking travels to make better shots than with the smartphone, but what I've noticed is that the photos are ...
4
votes
2answers
2k views

Why are JPEG images from camera huge and the same images exported from Vistaprint software 10 times smaller?

JPEG images from my Nikon D3300 are roughly 12-15MB big at 6000 x 4000resolution. RAW images converted to JPEG through LightRoom are also 12-16 MB. I recently created an album through VistaPrint ...
3
votes
1answer
94 views

Digitize and enhance a photo from the early nineties

I have a photo taken in the early nineties featuring someone who sadly is not going to be around for much longer. All I have is the photo, we looked everywhere for the negative but it couldn't be ...

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