Questions tagged [file-size]

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62 votes
15 answers
26k views

Aren't all digital images ultimately just pixel values between 0 - 255?

I have a few incredibly basic (stupid?) questions about images; specifically, image formats and pixel values. Forgive me, I'm not a photographer. I'm just someone that works with images, and to me, ...
Monica Heddneck's user avatar
14 votes
2 answers
587 views

Why is the amount of photos that fit on one card dependent on ISO?

I have a Canon 550D with a 16GB SD card. I noticed that, when in P-mode, if I choose an ISO of 100 I can shoot 595 raw files on an empty card. If I choose an ISO of 200 this is 590. And if I choose ...
Saaru Lindestøkke's user avatar
13 votes
4 answers
23k views

How to avoid jpeg compression artefacts when saving photos in web resolution?

When I save a web-resolution image (for example, 1920×1024px), flat areas tints often have damaged shades of color. I'm saving in Photoshop CS4 with quality 2 in standard mode, because I need the ...
Capsize's user avatar
  • 365
11 votes
8 answers
31k views

What is the "optimal" file size of JPEG images with respect to their 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 ...
Salman A's user avatar
  • 249
11 votes
7 answers
11k views

Two EXACTLY the same .jpg images with one image more than twice the file size of the other - Why?

I have a number of .jpg images which are EXACTLY (dpi, frame size, image) the same - except one is more than double the file size (in bytes) of the other. How can this be? When I zoom in by say 700% ...
Ron Whitley's user avatar
10 votes
4 answers
39k views

Why are two pictures that are the same dimensions/dpi such different file sizes?

I am working on a project where two my images must be AS SMALL AS POSSIBLE. I have scaled two images to the same dimensions/dpi and I've checked the color profile in Photoshop CS6 and they both look ...
daveMac's user avatar
  • 203
8 votes
10 answers
80k 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 ...
bran's user avatar
  • 189
7 votes
10 answers
188k views

How to reduce the file size of my photos (to under 15 MB)?

I don't have a "Pro" account on Flickr, just the free one, so my photo uploads are capped to 15 megabytes/file. After post-processing, my photos end up being too large to be uploaded to Flickr. I do ...
Nandhini Sandra Mogan's user avatar
7 votes
5 answers
6k views

Does the detail in an image affect how large the image file is?

I just took two photos on my smartphone. One of a table surface with nothing on it and another of a cluttered table top full of detail. The clear photo was 3.5 MB and the cluttered one was 5 MB. How ...
Jack.Ramsden's user avatar
7 votes
4 answers
7k views

RAW to TIF conversion creating GINORMOUS TIF Files

My wife is a photographer (Nikon D700, edits in Win7 Adobe CS5 suite) and mentioned yesterday that she's out of hard drive space. When I inspected, I found GIGANTIC .TIF files on her drive, ranging ...
Mr. JavaScript's user avatar
7 votes
4 answers
6k views

What is a reasonable file format for film scanning?

I'm looking to use my CanoScan 8600F to digitally archive the photos I've shot on film. The issue I've stumbled on is deciding on a file format. Ideally I'd like something that is lossless but with ...
Randy K's user avatar
  • 143
7 votes
1 answer
7k views

Why does file size increase so much when converting from RAW to TIFF?

I have been converting .CR2 files (Canon's RAW format) to TIFF files to make a timelapse video in Photoshop. Upon doing so I was astonished to realise that the file size rocketed from 23.9MB in the ...
Mark Fisher's user avatar
  • 1,107
6 votes
3 answers
9k views

JPG and file sizes - BASIC facts for dummy

Am I losing quality of the pictures when the size of the file drops? My daughter is sending me some JPG pics to edit for her. The file sizes start around 11MB & 3264x4928. After I do some mild ...
LittleLex's user avatar
6 votes
1 answer
1k views

Why are my photos taking too much memory?

I have a Canon 5D mark II. The weirdest thing happened today. I was shooting with a 4 GB memory in Raw and Jpeg and was only able to shoot 34 pics. I looked at my settings and couldn't figure out what ...
Teresa's user avatar
  • 61
5 votes
2 answers
1k views

What is the effect of long exposure on file size?

Is it a rule that long exposure will produce a larger size file compared to a shorter exposure? It seems logical, since you are writing more data to the memory card when you expose for more time. ...
K'''s user avatar
  • 6,497
5 votes
2 answers
1k views

Where is a camera's preview image stored, when shooting in RAW?

When you take pictures in RAW, the camera stores a preview image (possibly jpeg) that it shown on the screen using white balance and other adjustments set in the camera. Where is this information ...
connersz's user avatar
  • 1,896
4 votes
2 answers
16k views

Why does Photoshop show my JPEG files unusually large?

I recently opened a jpeg and a tiff of the same subject in Photoshop CS3. They both were made with a Nikon D300, and both had a file size of almost 35mb. If I checked the image info it said the jpeg ...
owen murphy's user avatar
4 votes
4 answers
30k 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 ...
Ankit's user avatar
  • 143
4 votes
3 answers
485 views

Image properties for social media?

My experience of social media is extremely limited, but I have occasionally been asked by a group to send them an image for use on their media. Sometimes as non-technical people only used to mobile ...
dmkonlinux's user avatar
  • 1,003
4 votes
2 answers
5k views

What application can rotate a TIFF without re-encoding it?

This is a followup to a question at Apple.stackexchange.com, Why does rotating a TIFF in Preview increase the file size? One thing I don't like about Preview.app is that even something as simple as ...
Kyle's user avatar
  • 143
4 votes
3 answers
748 views

Can I enable pixel binning on Canon PowerShot G1X?

On my camera, a Canon PowerShot G1X, I can select picture sizes from S to L. Now I wondered, if I select a smaller picture size, that would theoretically lead to more sensor surface per pixel, ...
GolezTrol's user avatar
  • 140
3 votes
3 answers
9k views

Why does simply saving a JPEG at 100% quality in Photoshop increase filesize?

If I take a picture taken with my EOS 60D, put it into Photoshop, edit it as I wish and save it as JPEG with maximum quality, the file goes from 5 to 12 mb in size. Obviously if I didn't increase the ...
sharkyenergy's user avatar
  • 1,394
3 votes
2 answers
188 views

Image File Size Question

Here, Wikipedia gives an example of 5 images with the same pixel dimensions of 300 pixels by 225 pixels, but with differing bit depths from 1 bit/pixel all the way to 24 bits/pixel. I thought that to ...
William Deng's user avatar
3 votes
2 answers
350 views

How to resize images in place in Lightroom

Generally, I take and store all of my images in RAW in Lightroom. If I capture a beautiful moment, I want to be able to access all of that beauty at any time in the future. But there are exceptions. ...
Merchako's user avatar
  • 197
3 votes
1 answer
525 views

Should I resize photos before or after image optimization?

I am a software dev who appreciates stunning imagry in sites I build, but am also very conscious of page size. My workflow has me adjusting image sizes to the maximum resolution they will be displayed ...
Rich's user avatar
  • 133
3 votes
2 answers
6k views

Nikon d5100 memory card capacity for NEF+JPEG(fine)

I just bought my first dslr (Nikon D5100) and I'm looking for an sd card to go with it. I would rather have just one card so I thought about 64GB SanDisk Extreme (45MB/s), however I don't know if I ...
StrayObject's user avatar
3 votes
1 answer
2k views

Why is there such a big difference with these JPG file sizes?

I have 2 nearly identical JPG images that have been processed externally, but one file is much larger (in file size) than the other. I have been looking at all the metadata and embedded information ...
Morgan T.'s user avatar
  • 133
3 votes
4 answers
92k views

How can I check free space on my memory card on a Nikon DSLR?

Currently I'm using a 4 GB memory card for shooting RAW on D5100, but how can I find the available free space on memory card from the camera? The number of shots remaining is so misleading!
Sourav's user avatar
  • 853
3 votes
2 answers
536 views

How do I prevent photoshop shrinking my RAW files?

Converted a RAW image to DNG but photoshop resizes them from 30mb to 8.5mb ?
Paul William Conlan's user avatar
3 votes
2 answers
14k 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 ...
user961627's user avatar
3 votes
5 answers
4k views

How do I constrain filesize of a bunch of photos?

I have a bunch of photos of jewelry that I need to upload to a website. Unfortunately there is a 2MB file size limit. Most of the photos are JPEGs over 3MB. I want to keep the aspect ratio, meta data,...
Alex Waters's user avatar
3 votes
1 answer
495 views

Is there a way to speed up working with large files in Photoshop? Like proxy editing?

I am currently using a camera that produces 60mp+ raw files which I pre-correct in Lightroom and then load into Photoshop for final editing. As I have around 10 layers with various corrections, the ...
Kai Mattern's user avatar
  • 4,226
2 votes
5 answers
2k views

How to know if a picture has too many pixels?

I have pictures from three sources, a Galaxy note 3 phablet, a Ricoh WG-M1 sports cam, and a Canon EOS 600D. I did set the EOS 600D to store as jpeg, and my pics are typically between 2.5 and 4.5 MB, ...
gb.'s user avatar
  • 241
2 votes
1 answer
1k views

Why do my tiff files balloon in size when saved with 1 adjustment layer?

I'm having an issue with tiff files that I can't figure out. Here's an example: I open a 40 mb tiff, add one curves adjustment layer, and save the file normally (i.e., using LZW, Interleaved, IBM PC, ...
Michael's user avatar
  • 21
2 votes
2 answers
774 views

How do I convert/re-compress select photos in Lightroom in-place?

As my Lightroom catalog grows there are some photographs I would like to preserve, but where I don't need all the editing latitude offered by RAW. I know I can convert them to DNG, but are there ...
Henrik's user avatar
  • 379
1 vote
5 answers
2k views

How does optimizer software reduce file size without reducing resolution?

There are numerous applications for reducing filesize. Most of them reduce resolution (e.g. from 300dpi to 72dpi) or reduce height and width. I tried http://www.imageoptimizer.net/ Surprisingly, when ...
Googlebot's user avatar
  • 363
1 vote
2 answers
240 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 ...
Sammy Peters's user avatar
1 vote
1 answer
4k views

How can I target a specific size in megabytes when saving a JPEG in Photoshop?

I need to save several files as 20mb jpgs. When I save an image in Photoshop CS5 at 20mb, then go to that saved file in my folder, it shows as a much smaller file. Is there a formula for hitting that ...
Marty Klein's user avatar
1 vote
3 answers
2k views

Are 24MB JPEGs sufficient for stock photography?

I have an EOS 60D that has 18Mpixel. An expert said I should use at least 24MB pictures for stock photography. My 18Mpixel Jpeg at 72 DPI are between 5MB and 14MB. What is the purpose of a 24MB file? ...
Luis's user avatar
  • 11
1 vote
1 answer
15k views

How to resize images in Lightroom to a particular file size?

How would I create a preset to export files to a given file size? I need to be able to export a 2mb file for a realtor.
Zoe's user avatar
  • 11
1 vote
2 answers
382 views

In Photoshop Elements, how much is image quality reduced if I re-save a previously saved "small" JPEG as a "large" JPEG?

Back story: I took a picture of a flower in RAW. Pulled it into ACR in PSE 12, moved it to the Photoshop Elements editor, made a few edits, then saved it as a "small" JPEG. When saving a pic in PSE, ...
markthomas's user avatar
  • 1,193
1 vote
1 answer
2k views

Can a Pentax K-5 record more than 4 GB of video with an SDXC card?

When using an SDHC card, the Pentax K-5 can only record up to 4 GB of video in a single clip. This is said to be because SDHC cards use the FAT32 file system, which has a 4 GB maximum file size. At ...
coneslayer's user avatar
  • 7,406
1 vote
1 answer
107 views

Looking for a good workflow to deal with large file sizes after Photoshop

I recently upgraded to a Nikon D850 which produces RAW files on the order of 37MB in size. I take these as DNG files into Lightroom. When I edit an image in Photoshop and then return to Lightroom with ...
steve_denmark's user avatar
1 vote
2 answers
2k views

Should two identical digital pictures of the same resolution and format have the same size?

I apologize if this is the wrong stack exchange site, but I thought my question might be too specific to photo encoding for stack exchange. I recently recovered a host of digital picture files from a ...
fedora's user avatar
  • 111
0 votes
1 answer
166 views

Do high export resolutions compromise image safety? [duplicate]

I specialize in macro photography and I've recently begun to export in 300-350dpi, as I find it does a better job of representing details (crucial to my work). However the file size is small, eg. ...
HelloWorld's user avatar
  • 1,145
0 votes
2 answers
433 views

Does JPEG compression reduce actual image size?

In this article it says "Generally speaking, the algorithm behind this format makes some trade-offs to lower the image size." Just wanted to check that this is referring to image file size, ...
ACrypticFish's user avatar
0 votes
2 answers
666 views

How can I get the largest MB and highest picture quality from my Panasonic TZ100

I am an amateur (have been for many years) who is trying to take photos of jewelry for poster quality print at A2 size. The image of the jewelry needs to be able to look good at about 1/3 of the size ...
Vaune Mason's user avatar
0 votes
2 answers
976 views

Why do different ISO images have different file sizes? [duplicate]

I set the ISO on my Canon 6D to 200: 1081 estimated shots remaining. I set the ISO to "auto": 728 estimated shots remaining. I'm shooting in RAW, if that makes a difference.
clickbait's user avatar
  • 1,293
0 votes
3 answers
976 views

Highest quality vs smallest file size for email

I'm intending to create some photographic images for printing. They'll be used to hang on a wall but will be quite large (80 - 100cm square). Obviously I want the quality to be as high as possible, so ...
Phatsnapper's user avatar
0 votes
4 answers
22k views

Reduce photo size to less than 20kb [duplicate]

I am trying to reduce image size to less than 20kb (Dimension 940*884 )for a eCommerce website. Using features of photoshop cs6 I am able to reduce image size to around 65kb. Below which the image ...
Akshay's user avatar
  • 1