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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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5
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3answers
998 views

Can I do “back conversion” of a B&W JPEG to color?

I have a black and white JPEG. It is in fact an RGB image, which means that the color is still there. And I know from past experience that when I shoot B&W with my Canon, the color image is still ...
0
votes
1answer
44 views

Lossless modification of JPEGs according to XMP metadata

I have a bunch of photos in JPEGs (not in RAW or any other lossless format). I turned on the option "Include Develop settings in metadata inside JPEG" in Lightroom. If I understand it correctly, it ...
0
votes
0answers
47 views

Is there an easy way to export photos from Lightroom in original format if they're unedited?

When I export a folder or collection from Lightroom, I want unedited photos exported in their original format, and edited photos exported in a chosen format, like JPEG. This is avoid ...
5
votes
1answer
111 views

Is there a way to set white balance of a RAW to match the preview JPEG?

When I view ARWs in Lightroom, I sometimes find the white balance of the embedded preview JPEG to be perfect, so I'd like to apply it to the RAW. How do that I do that in LR or other (free) software? ...
-4
votes
1answer
92 views

How do I reduce the file size of a jpeg image? [duplicate]

I have a photo in jpeg format that I am unable to reduce from 110 KB to 45kb. What software can do this?
9
votes
3answers
801 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 ...
0
votes
2answers
114 views

Will resizing JPEGs result in a compromise in my image?

I have several images for print, and only after deleting the original RAW files did I remember I needed to resize the images for print. Will resizing JPEGs result in a compromise in my image? They ...
0
votes
2answers
130 views

Is a RAW-only camera economically justified? [closed]

Is a digital camera which could only take RAW images economically justified? considering that RAW files may need less in-camera processing.
1
vote
0answers
24 views

How to save my album as JPEG on Kodak Digi Album Pro?

Objective: Save my album as JPEG on Kodak Digi Album Pro. I am using Kodak Digi Album pro and I'm new to this tool. This program generates a .PAB and .KPL file format, but I want my images to be ...
0
votes
2answers
52 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, ...
1
vote
3answers
101 views

Should I save scanned images of 35mm slides from a Nikon scanner in JPEG or Tiff?

I am scanning 35mm color slides, some 50 years old, with a Nikon scanner. Should I save the scanned image in jpeg or tiff format for saving on archival CDs?
0
votes
0answers
74 views

How do I force Lightroom to build previews from sidecar JPEGs?

I often need to sync my Lightroom catalog with another photographer, and to speed up this workflow, I sync only .lrcat and previews.lrdata files. If previews are big enough, there is no problem to ...
0
votes
0answers
108 views

Is exiftran still needed today for resetting the orientation of JPEG images?

Since more then ten years I use exiftran to rotate images after getting them from the camera. Is this step still needed today? Don't browsers and other image apps rotate the image correctly without ...
1
vote
0answers
141 views

What is the practical purpose of “use raw as original” in Photos for OS X?

Within OS X Photos app, when I shoot jpeg/raw and upload to Photos, I get an image representing both files. By default I am looking at the jpeg. Or I can choose a command "Use Raw as Original". I ...
0
votes
2answers
66 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 ...
1
vote
1answer
64 views

Is it possible to save the ISO, aperture, and other settings along with the image? [duplicate]

Is it possible to have the ISO, Aperture, and other setting save with the JPEG or RAW image when taking photos? I have the Canon T5i, and I'm fairly new to photography. I can keep a log book with ...
2
votes
2answers
406 views

Why doesn't my camera produce usable EXIF data with a Samyang 8mm fisheye lens?

I am using a Sony nex-5 camera with a manual Samyang 8mm fish-eye lens for panoramic photography. The image stitching application (Panotour 2.3) does not recognize the Exif data. How can I force ...
2
votes
2answers
315 views

How to save JPEGs from GIMP 2.8 and higher?

At present I am learning GIMP 2.8 after getting the advice from this website to edit the photos captured by my Nokia N8. The problem is: I do not know how to save them in JPEG format in GIMP because ...
4
votes
3answers
211 views

Which has a faster write time: RAW or JPEG?

My question is about the write times of the RAW and JPEG file formats. A RAW file is larger than a JPEG and needs more time to write to the memory but it does not need to spend time on data ...
1
vote
1answer
94 views

Batch change CMYK JPG into YCbCr JPG?

I recently got a bunch of JPG photos but all are looking very strange colour wise – almost like colour negatives! My photo viewing program is saying they are all CMYK format but other ones ...
2
votes
4answers
298 views

Why do modern DSLRs support JPEG but not lossless formats other than RAW?

I'm from a programming background and very new to photography. While working with the SDK for the Canon Rebel T3i, I realized that the only image formats natively supported by the camera are RAW (CR2) ...
1
vote
1answer
224 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 ...
20
votes
5answers
4k 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 ...
0
votes
3answers
93 views

Is it possible to do non-destructive JPG color correction?

I would like to perform color correction on my photos before printing so that my workflow will create reproducible prints. (i.e. the lab corrects my photos and I print them again later, they may be ...
2
votes
3answers
202 views

What is the best practice for batch compressing jpeg files?

This is fairly theoretical, as it is definitely in the realm of "pixel peeping" and is more or less irrelevant for practical use, but with the increasing popularity of full-width images on websites, ...
3
votes
2answers
261 views

How can I detect upscaled photos?

I have a collection of JPEG photos, each 500 to 600 pixels on the longest side. How can I detect which ones have been algorithmically enlarged from a substantially smaller photo? An online ...
2
votes
1answer
1k views

How can I set my Canon 5D Mark II to JPEG only?

I'm trying to find out how to set JPEG only mode on my Canon 5D Mark II - which options do I need to set from which menus?
2
votes
3answers
286 views

Best program to batch compress JPGs with minimal loss?

My photo catalog is getting bigger and bigger. It's mainly my fault because in my noob years I used to export all JPGs with a 100% quality, point at which files can reach the 10mb mark or even more. I ...
5
votes
2answers
421 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
178 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 ...
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votes
3answers
84 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 ...
16
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
175 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
444 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
3k 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.
3
votes
1answer
268 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
11k 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
161 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
3k 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
90 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
1k 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
566 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
70 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 ...
2
votes
2answers
661 views

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

Does 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? Does JPEG images, if added to the ...
3
votes
1answer
164 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 ...
-1
votes
1answer
175 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
2k 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
2k 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
156 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
272 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 ...