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Questions tagged [jpeg]

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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72 views

How to recover the orginal name of picture file .JPG made by device?

I'm wonder how to recover the original name of picture which was made by device (for example Camera or phone)? Is it possible? Let's say that someone make a photo and then change name of the .JPG file ...
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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 ...
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1answer
257 views

How do I find raw files corresponding to selected JPEGS

I shoot RAW + JPEG on fujifilm cameras and 90% of the time I'm fully content with my jpeg images but a few could use some editing. To save time I would like to cull my photos into three categories: ...
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3answers
256 views

How can I make sure my photos aren't damaged after copying them from a faulty SD card?

I’ve copied pictures from my faulty SD card. Most of the photos seem to be ok, but some have big gray parts where originally the photo was. How can I make sure that all the photos that seem to be ok, ...
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1answer
110 views

Can I fix a corrupted jpeg file?

I have some jpg files on an old hard drive, and it appears they were corrupted somehow. When I try to open them it says it's an invalid file type in Windows. I first attempted a couple of repair ...
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2answers
7k 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?
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2answers
101 views

Can I not use NEF on my Nikon D3100?

When I load my pictures to my computer two show up one says NEF and the other is jpeg. I accidentally deleted the jpeg and when I loaded them on my phone the NEF pictures were really bad. They where ...
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4answers
27k 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 ...
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1answer
145 views

Do Nikon sensor jpegs have a very slight yellow cast to them in the image compared to Canon?

I shoot with a Nikon D3400 and I am a beginner casual photographer. I shoot in maximum quality jpeg(NOT RAW) on auto white balance. Recently my friend and I were shooting some same subjects(my friend ...
43
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14answers
8k 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?
2
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3answers
698 views

Recover broken images that are corrupt

I had some issues with my computer and sent it out for repairs to a reputable dealer. So far everything came back perfect. I sent it in to be cleaned up and to try and recover some photos that were ...
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2answers
457 views

Why does the chart for my Canon 77D show more photos saved with RAW + JPEG than it does for RAW alone?

so since my camera saves my photos automatically in JPEG and since I wanted to have a RAW version of them I looked for some info about this topic and how it works on my DSLR, Canon 77D. I stumbled ...
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1answer
133 views

What is the relation between image file size and image quality? [duplicate]

Is small image file size means low image quality?what is JPEG image file size of 5d mark iv .Can we achive better image in small image file size?
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7answers
595 views

Is a JPG guaranteed to produce the same pixels?

I know there are plenty of benefits to shooting in RAW, but at the moment it seems that JPG works just fine for me. The file sizes are way smaller, and darktable seems to work just fine with them (...
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2answers
1k views

Does converting image file formats affect quality?

Does converting image formats, such as from JPG to PNG, have any effect on image quality? I know converting from RAW to JPG has disadvantages, but what about other format conversions?
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What JPEG settings for projection with Epson EH-TW5210?

I shoot in raw and edit with Lightroom. What settings, such as resolution and aspect ratio, should I use to export JPEGs for presentation using an Epson EH-TW5210 Full HD 1080p, 1920 x 1080, 16:9 ...
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2answers
86 views

Editing jpeg with Windows Photo Viewer gives strange results

modifying jpeg images from my Nikon D5500 with Microsoft Photo Viewer 6.1 (Windows 7), I am experiencing strange effects. I would like to understand if I am degrading the images or not. When I rate ...
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11answers
20k 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 ...
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2answers
1k 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 ...
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2answers
168 views

Trying to understand losses in jpg compression

I have a bunch of jpegs taken with a Nikon D3200 at 6016 x 4000. They weigh between 9M and 12M each. To try and reduce space a bit, I compressed copies with the default Windows utility, and the new ...
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3answers
4k views

Remove “quality” property from JPG

I noticed some photos missing "quality" information in their metadata using ImageMagick's identify command identify -verbose image.jpg How can one remove this info? This is one example
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3answers
321 views

Why does NEF file get washed out/highlights while my JPG look normal? [duplicate]

TLDR. is just the title. I know nothing about photography, sorry. My dad has a d90 he never uses, so I use it to take photos when I need them for something. Anyways, I put it on raw mode. when I ...
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3answers
142 views

How can I losslessly extract 2D image from a stereoscopic JPEG?

I have some JPEGs captured from a Nintendo 3DS via Miiverse and would like to optimise them for the web. The images are 2D but stored as a stereoscopic JPEG, so each file ends up containing the same ...
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3answers
168 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 ...
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1answer
894 views

How can I view .ctg files taken from my Canon camera?

How can I see the images taken from my Canon camera. All files are converted into CTG, and I could not open either in the camera nor on the PC.
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2answers
149 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 (like DNG, ARW, PNG) and edited photos exported in a chosen format, like JPEG. Is there ...
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2answers
2k 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 ...
2
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1answer
145 views

Why do some pictures rotated with exiftran have a vertical line on the right?

I use the following command in a script: exiftran -a -i mypic.jpg For some pictures, I get a wrong vertical offset, which is seen as a vertical line along the right border of rotated pictures. This ...
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4answers
2k 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 ...
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3answers
246 views

Printing digital photos: why do (most it seems) print shops only handle PDF not raster formats like PNG?

I am in Sydney, Australia. My otherwise very helpful local print shop only handles PDF (with limitations as described in this forum posting). I have so far not found any print shops in Sydney that ...
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1answer
952 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 ...
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2answers
1k 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, ...
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2answers
823 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 ...
27
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4answers
5k 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 ...
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3answers
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 ...
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1answer
416 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 ...
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0answers
96 views

JPEG2000 File Format [closed]

I was working on a project that required using Intel's IPP libraries to convert an image in BMP to lossless JPEG2000 format (.jp2). I went through a book on JPEG2000, and based on what I understood ...
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4answers
8k views

Is Lightroom overkill for a JPG-oriented workflow?

I am a passionate not a professional, I shoot most of the time in jpg because: I usually don't have the time to process raw raw takes a lot more space (and I feel my D700 jpgs are huge already!) and ...
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6answers
4k 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=...
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5answers
703 views

How can I physically rotate a digital photo under Linux?

I was using gThumb version 3.2.7 for some time and I was particularly happy with option "Rotate Image Physically". Because I don't want to rely on EXIF photo rotation data. Recently I bought better ...
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2answers
2k 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 ...
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1answer
96 views

regarding image transfer [closed]

I have this client that is having a very frustrating time. I took some pictures for their clothing line. I formatted them for social media posting and copied them to a USB. I gave her the USB and for ...
2
votes
4answers
534 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, I'...
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2answers
488 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 ...
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3answers
2k views

Is it not ideal to save image as PNG for printing?

So the scenario: I want to order a print of one of my images. It is a special image and will be relatively large (a couple of metres) so I want it to be perfect as possible. I have the RAW file, ...
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1answer
319 views

Coolpix P900 artifacts

Although I declare myself very satisfied with my Nikon Coolpix P900, I've had in my recent trip in South America numerous pictures blurred by a random artifact, and I would like to know how to avoid ...
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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 ...
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12answers
34k 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 ...
3
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1answer
182 views

How to copy images without losing their size? [closed]

For a project it has been specified that my images need to be at least 6MB. However, whenever I copy or move them around they dramatically decrease in size - and that is even before I have edited them ...
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2answers
172 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 ...