Frequent 'jpeg' Questions

32 votes

4 answers

67k views

Why do RAW images look worse than JPEGs in editing programs?

I've found that when you load a RAW image into an editing program such as Lightroom/Aperture, the image is usually worse than if you just took the image as JPEG. Now I understand that the camera does ...

erotsppa

3,308

asked Jul 29, 2013 at 21:18

310 votes

16 answers

62k views

Good examples of RAW's advantages over JPEG?

I'm curious to see some real examples of where simply capturing the same photo in RAW (and being processed by someone who can do it justice) has significantly improved the photo at the end of the ...

Nick Bedford

9,772

asked Aug 19, 2010 at 1:35

22 votes

6 answers

7k views

Does the dpi number reported by camera in JPG have any meaning?

I have two cameras, a 6mpix Panasonic FZ8, and 14mpix Canon A2200. When I compare shots from two cameras, one of differences I notice is dpi number that camera reports in JPG info: FZ8 reports dpi=...

Andrei

1,097

asked Apr 22, 2011 at 18:33

45 votes

14 answers

9k views

What are the pros and cons when shooting in RAW vs JPEG?

In general shooting in RAW format uses a lot more file storage than JPEG. What am I gaining when shooting RAW? Besides file size are there any downsides to shooting RAW?

jessegavin

1,413

asked Jul 15, 2010 at 19:25

27 votes

6 answers

48k 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 ...

mattdm

144k

asked Jan 16, 2012 at 16:28

34 votes

4 answers

8k views

What factors cause or prevent "generational loss" when JPEGs are recompressed multiple times?

For years, I've believed that recompressing JPEG files multiple times would gradually degrade its quality until they are an unrecognizable mess, the way making photocopies of photocopies does. This ...

xiota

27.1k

asked Jun 27, 2018 at 11:25

15 votes

2 answers

2k views

Why does the histogram of an image depends on the software that opened it?

If I open a raw image in Photoshop and Paintshop pro their histograms and their look is different. However, if I open a Jpeg image in both Software, then their histogram and look is the same. What ...

MOON

335

asked Mar 1, 2018 at 13:01

11 votes

2 answers

6k views

Is it worth using Pentax's Premium JPEG quality setting?

Similar: How do I choose which resolution (megapixel) and compression (normal, fine, superfine) to shoot in? The Pentax K-5 has a JPEG quality setting called "Premium", denoted by four stars, which ...

bwDraco

5,946

asked Mar 25, 2012 at 16:32

35 votes

15 answers

14k views

Why store both JPEG and raw?

DSLRs often have the ability to store both a JPEG and a raw file. Given that the primary benefit of in-camera JPEG over raw is the smaller filesize, and that JPEG+raw is going to store even more data ...

Evan Krall

12.4k

asked Mar 29, 2011 at 7:52

32 votes

8 answers

8k views

Why can I adjust the white balance of a RAW file but not a JPEG file?

I recently started setting my DSLR to save RAW files, and using Adobe Lightroom to process them. I still, however, use my little point and shoot camera a lot which does not have an option to save RAW ...

Eric

1,411

asked Dec 4, 2010 at 1:46

9 votes

3 answers

4k views

Does JPEG-to-JPEG export Lightroom reapply compression?

I want to crop a JPEG file in Lightroom and export that cropped file to another JPEG so that I can e-mail it. The exported JPEG should have the same quality as the original. I don't have the RAW file ...

Saaru Lindestøkke

8,763

asked Feb 1, 2013 at 17:44

62 votes

1 answer

20k views

Are "Windows Photo Viewer" rotations lossless?

Can I rotate lossily compressed photos that I view in Windows Photo Viewer without worrying about losing even more information to compression?

user5306

asked May 24, 2011 at 12:17

54 votes

9 answers

226k views

What quality to choose when converting to JPG?

When you export a picture to JPG you can normally choose its quality in a 1-100 scale. I like to keep a good quality but it wouldn't make sense to keep a JPG that will be almost as big as the original ...

santiagozky

909

asked Dec 5, 2012 at 9:16

28 votes

5 answers

58k views

Is there a tool to check the file integrity of a series of images?

Sometimes when you're downloading an image and the connection breaks mid stream, you are left with a half downloaded image. If you try to view it you get the upper part of the image and the bottom ...

Rook

1,487

asked Jan 14, 2014 at 19:51

24 votes

11 answers

28k views

How to delete JPG files, but only if the matching RAW file exists?

My early (Canon G2) photos are all JPG, but when I got my Nikon D90 I initially shot in JPG, then switched to RAW+JPG, and now I would like to switch to RAW only. I have literally thousands of photos ...

seanmc

5,095

asked Oct 15, 2011 at 2:44

4 votes

3 answers

7k views

Is there a way to recover corrupted JPEG files?

I'm wondering if there is a way to recover corrupted JPEG files. They got corrupted because I deleted a folder for error and I promptly recovered it with a recovery software. Most of the photos are ...

Jack

141

asked Jun 6, 2012 at 2:33

62 votes

7 answers

24k views

Why don't most cameras support PNG format?

I prefer PNG format to JPG, because JPG uses lossy compression. When I capture a screen in my PC or scan a picture or document in my scanner, I always save them as PNG format. If a camera could ...

Benjamin

653

asked May 5, 2011 at 11:03

20 votes

3 answers

11k views

Why does JPEG quality go up to twelve?

Wwhy does the JPEG quality option in Adobe products go up to twelve? Here's the option in the Save dialog of PS: Thats a whole new definition of it goes up to eleven.

Andres

5,044

asked May 3, 2011 at 2:07

17 votes

11 answers

3k views

Can in-camera JPEG have image quality advantages over (third party software) converted RAW?

Question about RAW advantages over JPG made me curious if somebody has examples where in-camera JPEG is actually image quality-wise better than RAW image converted in computer (possibly by third party ...

Karel

10.7k

asked Aug 19, 2010 at 19:33

6 votes

2 answers

2k views

How do I evaluate a camera's JPEG tone curve options when the manufacturer only provides flowery prose?

There aren't many options for RAW development for the Fujifilm's X-Pro 1 because of its unique sensor layout. However, Fujifilm has clearly spent a lot of time working on the in-camera JPEG results, ...

mattdm

144k

asked Apr 29, 2012 at 15:27

41 votes

8 answers

20k views

If an image is rotated losslessly, why does the file size change?

I was searching for methods of lossless image rotation and happened upon this question which explains it rather nicely: Are "Windows Photo Viewer" rotations lossless? So I created a 256×...

oscilatingcretin

553

asked Nov 7, 2016 at 0:11

12 votes

3 answers

2k views

Should I convert RAW to jpeg before making an HDR?

I've been going back and forth with this. I've been looking more into working with some HDR to just get a feel for the process. I have a 500D and I'm using exposure bracketing to take 3 shots. 0, -2, ...

Jeremy B.

315

asked Apr 28, 2011 at 17:28

7 votes

2 answers

1k views

How similar is in-camera JPEG processing to own brand RAW conversion?

We know that the JPEG produced by in-camera RAW conversion is very close to that produced by using the RAW converter provided by the camera manufacturer, but how close is it in detail? I'm interested ...

Philip Kendall♦

22.2k

asked Oct 14, 2013 at 9:02

3 votes

2 answers

4k views

What software raw converter can convert from .raf to .jpg, replicating the Fujifilm in-camera raw conversion algorithm?

Why I ask for software To perform batch conversion of many existing .raf files to .jpg. Why I want Fujifilm's algorithm, specifically I have tried Lightroom and Silkypix, and both fail to give usable ...

cyanos

545

asked Nov 18, 2012 at 21:33

3 votes

1 answer

2k views

Why are colors different between RAW and JPEG when both are viewed in Lightroom?

Yesterday I was shooting images of trees that were wrapped in the beautiful baby lights that stores put in holidays. I noticed, when I went back home and checked my photos, that there is a slight ...

K''

6,507

asked Dec 4, 2011 at 23:34

2 votes

3 answers

863 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 ...

Christian

123

asked Jul 27, 2018 at 18:14

0 votes

2 answers

2k views

How to know correct exposure for RAW shooting when camera show JPEG Histogram

I heard that RAW Data is not the rendered data, which means it can’t be influenced by white balance, saturation, and all other settings. I believe that “RAW Data” is influenced by the intensity of ...

user74181

asked Mar 24, 2018 at 7:29

30 votes

8 answers

28k views

How can I add a border to a JPEG photo without affecting quality?

I have a photo in JPEG format with resolution 4680x3120. I want to add a white border around this photo, turning it into a 5200x3467 photo (for printing reasons). Clearly, I am not altering or ...

LBogaardt

403

asked Mar 16, 2015 at 13:51

26 votes

12 answers

45k 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 ...

markthomas

1,193

asked Oct 30, 2014 at 14:09

11 votes

8 answers

34k 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 Arshad

249

asked Jan 9, 2019 at 11:19

10 votes

4 answers

22k views

How to identify photoshop-edited files

If I have saved an image in JPG format after doing some edits, is there a way to identify that it is edited with Photoshop?

Harsha

203

asked Aug 13, 2012 at 5:40

9 votes

9 answers

65k views

How to convert JPEG to RAW in Photoshop or similar?

I am having a competition in which I have to submit images in RAW format. But I have already clicked some images with Nikon D3200 in JPEG.Is there any way to convert JPEG to RAW format in Photoshop or ...

zackygaurav

193

asked Feb 5, 2016 at 8:20

9 votes

2 answers

588 views

Is there a middle ground format between RAW and JPG?

JPG files use 8 bits per color per pixel (I've never heard of any camera that uses the alleged 12-bit-per-color-per-pixel extension) and is a compact way of storing images. RAW files are huge but ...

Jason S

761

asked Sep 13, 2010 at 23:16

6 votes

6 answers

14k views

Should I use Active D-Lighting when shooting Raw?

I understand (ref) that I can do my own post processing to get the same effect that Active D-Lighting gives. But does the in-camera ADL get applied to the raw image data or is it only done to the ...

Jim

1,207

asked Apr 12, 2013 at 14:16

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

143

asked Feb 19, 2013 at 15:49

3 votes

3 answers

44k views

Why are my recovered images only 160x120 pixels?

I am trying to recover some lost images, and with all the programs I've tried, some of the photos resulted to be in a 160x120 pixel resolution. What does this mean, and is there any possibility to ...

cprogcr

141

asked Aug 1, 2012 at 23:42

3 votes

2 answers

977 views

Nikon in-camera vs lightroom jpg conversion [duplicate]

I'm just getting started with Lightroom 4. I've been shooting RAW + JPG using my Nikon D7000, but would like to just shoot RAW and then convert to JPG in Lightroom. What's the most efficient way to ...

Bruce S.

31

asked Jun 28, 2013 at 22:17

2 votes

3 answers

17k views

Should I use RAW or JPEG for wedding photography?

I am about to shoot in a wedding ceremony and would like to know, Should I shoot in RAW or JPEG? I asked a photographer (outside the US) and he said converting RAW into JPG changes color (or ...

TheTechGuy

1,561

asked Dec 24, 2011 at 12:37

2 votes

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

31

asked Mar 16, 2015 at 19:18

2 votes

1 answer

2k views

Does reducing JPG resolution decrease, increase, or have no effect on image quality?

I'm getting ready to download a bunch of images from microstock photo agency Dreamstime. I'll eventually want most of the images in the 400x300 pixel range for my website when I'm done working with ...

Newbie Aspiring Programmer

149

asked Mar 31, 2012 at 17:12

30 votes

5 answers

4k views

Why don't cameras support JPEG 2000 format?

The original JPEG format was updated in 2000 to provide a variety of features including less artifacts, better compression and lossless compression. Why haven't cameras updated to use this new format?...

Mike Bryant

303

asked May 5, 2011 at 17:16

24 votes

4 answers

209k views

What are the optimal JPEG settings for high-resolution Facebook photos?

With the current facebook photo uploader, what are the optimal settings for uploading high-resolution photos. I process my images in Adobe Lightroom. I'm aware of a similar question asked in the past,...

ides

1,007

asked Oct 3, 2012 at 8:42

22 votes

3 answers

23k views

How does Picasa process RAW photos?

How does Picasa decide how to process RAW photos? When I shoot in RAW+JPEG the two pictures can look dramatically different. Is it just converting the RAW files upon import, or is post-processing ...

JoeGaggler

333

asked Jul 22, 2010 at 3:41

21 votes

5 answers

256k views

Should I use JPG or TIFF for high-quality prints?

I am putting together a photo book. I shot all the photos in RAW. The prints will be 300pi on 13x11 inch glossy paper. I am laying out the pages in InDesign, which doesn't allow me to import and place ...

bperdue

1,290

asked Apr 13, 2011 at 20:41

19 votes

6 answers

21k views

How can I convert an Apple iOS HEIF image into JPEG?

How can I convert an HEIF/HEIC image into a JPEG? Maybe using ImageMagick?

OneSolitaryNoob

387

asked Aug 8, 2017 at 19:19

19 votes

11 answers

7k views

Why use JPEG instead of RAW?

Why would a photographer want to capture images using the JPEG format over an available RAW format? The obvious argument is memory card storage, but assume that my available memory card storage is ...

dpollitt

46.6k

asked Nov 24, 2014 at 2:22

17 votes

3 answers

10k views

Does Flickr recompress JPEGs after upload?

Does Flickr recompress JPEGs after upload? I know that if you upload a TIFF, for example, Flickr converts it to JPEG. But do they also compress incoming JPEGs? I've read some complaints about the ...

jaxxon

706

asked May 26, 2011 at 4:35

15 votes

2 answers

2k views

Software that guesses which algorithm saved a given JPEG

Some time ago, I found a piece of software that would provide a good guess on the software/algorithm used to save a JPEG. If I recall correctly, it would analyze something like the compression ...

Roflo

859

asked Dec 10, 2015 at 18:19

15 votes

3 answers

7k views

Is there a lossy compressed file format for 16-bit dynamic range images?

I'd like to aggressively compress some scientific 16-bit grayscale image files, but without reducing the dynamic range. Is such a thing possible? I understand that JPEG format uses lossy, and ...

Christopher Bruns

253

asked Jul 17, 2015 at 13:20

13 votes

4 answers

24k 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

365

asked Nov 30, 2010 at 19:52

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