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JPEG is an adjustable "lossy" compression method commonly used in digital photograph. The most common filename extensions for images using the JPEG format are .jpg and .jpeg. Compare to alternative image formats such as TIFF and the various RAW formats.

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2answers
36 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 ...
6
votes
1answer
106 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 ...
-3
votes
3answers
63 views

JPEG image problem [closed]

So my problem is with one of the Jpeg's I am working with. The things with Jpegs is that if you change even the slightest part of its HEX file, the whole image just gets screwed up. I zeroed out about ...
15
votes
8answers
4k 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 ...
2
votes
1answer
90 views

Why do some programs show my portrait photographs in the wrong orientation?

Why do my jpg phone photos show as portrait in Windows (1536x2048), but in Mediainfo and Paint Shop they show as landscape and rotated ccw (2048x1536)? It's as though they have two sets of meta data ...
1
vote
1answer
77 views

Exporting jpg files from Lightroom without develop adjustments

I am starting with Lightroom 5. I imported my raw pictures from my Canon and made some changes in some pictures. Then I've exported these pictures to my client and it's alright. Now I want to export ...
-1
votes
1answer
101 views

how to convert CR2 to jpg in batches on digital photo professional 4.1

how to convert a batch of CR2 to jpg on digital photo professional 4.1 Step by step please.
1
vote
2answers
72 views

How can I strip tags from a JPEG without removing the color profile?

For a while now I have used exiftool to strip away unnecessary metadata from jpg files (and to add copyright information) before uploading them: exiftool -all= image.jpg However, today I noticed ...
21
votes
10answers
7k 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 ...
4
votes
2answers
116 views

How to retain focus point information in JPEGs exported from Lightroom?

I just tried out a plugin for Lightroom that shows the used focus points and found that it works fine for RAW files (CR2), but fails for JPEGs. The plugin notifies me that the JPEG doesn't contain the ...
1
vote
1answer
419 views

How to remove 'Program Name: Adobe Photoshop' from the metadata?

I've tried all the solutions from here as well as from stackoverflow, the tool mentioned (ExifTool) won't remove the metadata. I'd like to remove all the Photoshop information from my jpeg, leaving ...
0
votes
1answer
63 views

Is this file size adequate for jpeg images?

While my photos usually are ~ 150kb average, I find some to double that size under the same settings. Specially Black & White photos. Is this size normal, because of the amount of different tones ...
1
vote
2answers
131 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 ...
1
vote
1answer
335 views

Photoshop - JPEG Image Option - Difference in Quality [duplicate]

In Photoshop, while saving an image as JPEG, there is an Image Option called Quality. Increasing or decreasing the value, only increases or reduces the size of the JPEG file. If we try to zoom in ...
1
vote
0answers
59 views

Why is there a vertical line on the right of some pictures rotated with exiftran?

I use the exiftran -a -i mypic.jpg command line tool in a script and on some pictures I get a wrong vertical offset, which can be detected as a vertical line on the right of rotated pictures like this ...
0
votes
0answers
78 views

exporting files from DNG to jpg

I standard convert all my NEF file to DNG for easy access and because all metadata is stored in the file, instead of a sidecar xmp file. When I use export file and the orginal file is DNG I just get ...
2
votes
2answers
628 views

Is a JPEG image uncompressed to bitmap prior to displaying it on the screen [closed]

Is a JPEG image converted back to bitmap image when displayed on the screen? Does it occupy more memory than the actual file-size when it is being displayed? Will JPEG images, if added to the ...
3
votes
1answer
127 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 ...
-3
votes
1answer
116 views

Does Lightroom 5 do any lossless operations on JPEGs?

There are many lossless transformations that can be done on JPEGs: Crop Rotate by 90 or 180 degrees in either direction Flip horizontally or vertically Transpose along either diagonal axis Modify ...
7
votes
2answers
1k 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 ...
2
votes
3answers
555 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 ...
1
vote
1answer
120 views

How to get back from a print to an image file

I manage a growing collection of jpeg photos (27k so far) for my partner. Aside from the time it takes to accurately tag them all (I only have about 7k of them tagged :( ), everything is fine. The ...
0
votes
1answer
163 views

Jpeg images are zoomed and ORF files are not in Lightroom 5

I am using Lightroom 5 and imported jpeg and raw images from my OMD EM1 shot with the 12-40mm kit zoom lens. Some of the jpeg images seem to be zoomed while the raw (orf) images are not for the same ...
1
vote
1answer
194 views

Repair corrupt photos recovered from a flash memory card [closed]

I recovered few pics from my flash memory card of class 10. Now these photos are not opening in any photo viewer. Images are of RAW and JPG format. When click on image it says "Invalid Image" How do I ...
0
votes
0answers
40 views

Does this appear correct? Comparison of PSD & TIFF file sizes when using adjustment layers. [duplicate]

I've been investigating file sizes after noticing my 16 bit TIFF files grow enormously after adding adjustment layers (saving with layers, not flattening). Here's what I found: File #1 (0 layers) ...
1
vote
1answer
69 views

Is it possible to extract a JPEG that has been converted into DNG?

It's possible to convert JPEG's to DNG in Lightroom. Is it possible to extract the original JPEG again after conversion (a 1:1 identical copy to the originally imported one) later on?
0
votes
1answer
65 views

Corrupted photos [duplicate]

Unfortunately SD Card (Kingston 64gb) that I've used in a photoshoot appeared to be faulty and large part of images taken are simply not visible. However I've been able to copy the files from the ...
2
votes
1answer
99 views

Can I use Darktable to export unmodified JPEGs without recompression?

To give you context: I shoot in JPEG Import into Darktable Edit some of the pictures Export all the photos for archiving as JPEG That's fine for images I've tweaked. But it would be nice if the ...
1
vote
1answer
141 views

Can firmware upgrades significantly increase JPEG quality?

I've been wanting to bite on the new Sony a7 mirrorless full-frame camera, but reviews are surfacing poor JPEG quality compared to other FF cameras. While I often shoot RAW, JPEGs are critical if you ...
1
vote
3answers
2k 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 ...
0
votes
1answer
120 views

Is there a free tool that can set the file time to match the camera time in jpg meta data? [duplicate]

I have a bunch of pictures for which something went wrong during the import (I used Image Capture on Mountain Lion) went wrong and the file time is completely random. The correct time when the picture ...
1
vote
3answers
403 views

JPG Images recovered immediatelly after deleting from SSD, but 95% of files can't be opened

So I have Windows 8. I SHIFT+ENTER accidentally deleted all pictures instead of half. I used global purpose "File Scavenger 3.2" program, which was always working perfect for last 5 years to restore ...
1
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1answer
204 views

Why does the sound seem different when taking picture in RAW vs JPEG?

I'm using Nikon D300. I've just switched image format from RAW to JPEG today. The sound of shutter seems different (faster than in RAW format) although they're as same shutter speed (I know that ...
1
vote
1answer
240 views

Extracting unique ID of images [closed]

I messed up my image collection and it now contains a lot of duplications. Unfortunately, the file names are not unique either as the collection is coming from several devices that simply order the ...
4
votes
2answers
221 views

How exactly is the deeper bit-depth of RAW mapped onto JPEG and the display?

I am trying to understand RAW better. I have a Canon EOS 20D, and shoot in RAW+Jpeg mode. According to the specs in the manual, the RAWs of the 20D are 12 Bit. I understand that this means each pixel ...
3
votes
1answer
193 views

In Aperture, how can I export the preview of an image or locate the preview file?

I left my referenced masters elsewhere and would like to export the preview itself for sharing online. How can I grab a copy of it? I suppose taking screenshot is one possibility, but would rather ...
5
votes
2answers
310 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 ...
2
votes
6answers
701 views

why shoot RAW plus jpeg [duplicate]

I understand the differences between RAW and JPEG. But why does my DSLR offer me the opportunity to shoot RAW plus JPEG simultaneously. What benefits does this offer over RAW only, especially since I ...
1
vote
2answers
1k views

DPP output is not sharp

I am using DPP (Digital Photo Professional by Canon) for post processing. Not sure what is wrong with it, but every time I produce an image (.JPEG) out of raw (.CR2) file, it turns blurry. I tried all ...
1
vote
0answers
220 views

Why does ViewNX suddenly give an error with NEF files from my D90 but not my D700?

Previously my D700 & D90 have downloaded NEF files to my computer within View NX and I have been able to convert these images to jpeg within this program. My D700 continues to do this. However, ...
5
votes
3answers
3k 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 ...
5
votes
4answers
1k views

Why does Darktable export enormous JPEGs?

I have a Nikon D3200 and just started shooting in Raw. Raw files are 18-24mb, and if I convert them to JPEG using Nikon's ViewNX 2, I get 8-12mb files at the top quality and resolution using sRGB; ...
0
votes
0answers
1k views

how to repair a corrupt jpeg? [duplicate]

I am putting together a slideshow of 10+ year old digital photos for a slideshow and found that one of my external hard drives has a handful of corrupt jpg images. I was able to copy the images off ...
3
votes
2answers
453 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 ...
2
votes
2answers
437 views

Is it possible to make a 1-bit (bitonal) JPEG?

I think the answer is no, so I guess what I'm really looking for is an explanation. It seems as though with every library and tool I've tried for converting images, even when all of the pixels are ...
1
vote
3answers
469 views

How can modified images be displayed on a Nikon camera?

I made changes to my RAW images in Lightroom and exported them as JPEG to save on an SD card which I inserted into my camera. When I tried to show the pictures to my family and friends, I got the ...
3
votes
3answers
1k views

Does reducing Lightroom export file size reduce image quality?

Sometimes I reduced the file sizes of my jpeg images for faster uploading to the web. Does this reduce the image quality?
2
votes
1answer
136 views

Where should I store the metadata for personal images?

I'm adding coordinates, location, country name, my name, url, and occasionally a description to my photos. They are all in the JPEG format. I use them mostly for personal use but give some away to ...
1
vote
2answers
238 views

Is conversion to 16 bit needed for good PP results when working on JPEG images?

When working on JPEG files, should I start by converting the images to 16 bit depth? Supposedly that would make for more room for the adjustments I'm going to make on the photos. Two occasions that ...
1
vote
3answers
1k 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 ...