JPEG is a lossy-compression method for a digital image. The images can end up in many JPEG image containers (JPEG, JPG, JIF, JPE, JFI, JFIF) depending on the parameters surrounding the compression of the image data. JPEG is actually an acronym for Joint Photographic Experts Group, the group that ...

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2
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0answers
40 views

Can JPEG format be used in proprietary software?

We are developing a video format, and we are considering to use JPEG for the video compression. Can we use it freely or is it protected with a Copyright? Do we need to pay in order to use it? We ...
-1
votes
1answer
25 views

JPG file metadata [duplicate]

I am trying to get any information from a picture. I need the date, name of the person who took it or anything. I am trying to use some metadata checkers but they just show me the resolution and type ...
4
votes
3answers
11k views

Removing Background color in Paint.net

I have a .jpg image of a text logo, it looks similar to the example image here: I am using paint.net. Now, I would like to change the image to .png, then I would like to remove all the white ...
0
votes
1answer
69 views

Lately My Photoshop Switched to Saving Images Much Larger in Jpeg format

Images I used to save in various sizes in jpeg format have all switched to being saved as much larger file sizes. My 12x18 Posters are now 25 Megs instead of 11-17Megs the next size down 6x9 has ...
1
vote
2answers
99 views

Converting NEF files to JPEG

What is the fastest way to batch convert NEF files (Nikon RAW) to JPEG? I'v tried FastStone Image Viewer and Nikon's Capture-DX on my RAM-drive but they appear to be very slow, although Capture-DX ...
0
votes
1answer
16 views

FFmpeg command line with option tee muxer, output to video file, and image2 muxer at the same time

I would like to save still images from a video, which is on a direct http URL. At the same time I want to save the video as well. How can I use ffmpeg with its special tee muxer to save the images and ...
0
votes
3answers
3k views

Convert PDF to JPG without Imagemagick

Is there a way to convert a common UTF-8 encoded PDF to a JPG without using ImageMagick or Ghostscript? The reason I'm asking is, that I have to replace or "simply" double layer a small part (date) ...
0
votes
1answer
35 views

JPEG size made smaller by MSPAINT, why?

I have lots of JPEGs from DSLR, and they are roughly about 5-6MB per JPEG. I open any of them using MSPAINT, and click the SAVE and notice the size immediately go down to 2-3MB. Why? there seems no ...
2
votes
1answer
77 views

Batch populate JPEG IPTC keyword from csv or txt file

I have 50,000-plus JPG files which I've tagged for easy lookup by user-selected keywords. The database which matches image files with their keywords is proprietary and utility-specific. I want to ...
16
votes
8answers
39k views

Stop Windows 8 from converting wallpapers to low quality JPGs

Hello, visitor from the future! If you landed here because you're as annoyed as I am, consider voting for this thingy on Microsoft's Uservoice page for Windows 10. Turns out that Microsoft truly ...
0
votes
1answer
24 views

Jpeg File Zipping does not compress at all

i'm trying to compress some jpeg photos, the total dimension is around 150MB, but when i try to zip it using the maximum compressing rate, i keep getting something around 150MB. I tried with Winrar ...
0
votes
2answers
92 views

Jpeg size difference

I have a 2560x1600 JPEG image and its file size is 2,532KB. Due to a website's upload restriction, I had to reduce the size of the image. Naturally I thought, "I'll just resize it in Windows so I can ...
1
vote
3answers
2k views

Printing JPG files with GIMP 2.8

I used to print my (with GIMP 2.6.11) modified images on my Canon Selphy CP780 printer without any problems. But now I use GIMP 2.8.2 and the modified and exported JPG files won't print anymore. ...
2
votes
3answers
2k views

How to generate an EXIF thumbnail for a JPEG?

I have a Canon Selphy printer and when trying to print images that have been edited on my computer a question mark appears in the viewer screen. It appears that the EXIF thumbnail in the image has ...
0
votes
0answers
29 views

Cannot Delete JPEG Image Files

I have a very odd issue with one machine. It seems to not want to delete JPEG files. If I try and delete it from within the Windows GUI, it just comes up with the estimating delete time and never ...
0
votes
1answer
53 views

ffmpeg convert image to mpeg/mp4

To convert jpg to avi this code works perfect on my server shell_exec("ffmpeg -f image2 -r 1/10 -i image.png out.avi"); I need to convert jpg/png images to mp4/mpeg. How do I do this?
0
votes
2answers
29 views

When is The GIMP gonna let me save ( not export ) .jpg, .png, etc.? [closed]

When is The GIMP gonna let me save ( not export ) .jpg, .png, etc.? Not Why Not, Just tell me when. Having to export the most common graphic file extensions in the world is Jejune.
1
vote
1answer
93 views

lossless video using FFmpeg ffv1 on jpeg images is not compressed but expanded

Is it possible for FFmpeg / ffv1.3 / mkv to create a lossless video is not larger than the sum of its parts (and if so, how) and if not, what is a good alternative to come close on size? The video ...
3
votes
1answer
71 views

When a PDF file only contains a scanned image, is it just a JPG image inside a PDF container?

Many scanners can scan a page into a PDF file. When this is done, is the PDF file really just a container that contains a single image? Is that image typically a JPG image, a PDF image, or a ...
5
votes
1answer
24 views

Add date watermark to jpg images

I am attempting to add a watermark to images that contains the date. I am not having any trouble putting text on images but as soon as I try and put a date I get unpredicted results. convert -...
0
votes
3answers
8k views

Convert JPG to Video for playback in VLC

Is this a quick/simple way to convert a bunch of JPG stills into some sort of video file so it can be played back in VLC? If the convertion can be done using VLC, that would be preferred.
10
votes
5answers
10k views

How to find the JPG quality?

When I save a JPG file with GIMP, I can adjust the quality I save it at, from 0-100 (I use 89). It seems like I've used an app to see what this number was on saved file but if I did I can't for the ...
1
vote
2answers
101 views

Is JPEG photo same as RGB JPG file?

All my photo's are JPEG images (e.g. IMG_1202.JPG), which say sRGB under colour representation. I want to upload photo's to iSTOCK, and they require RGB JPG files only. TIFs, PNGs and PSDs will be ...
0
votes
1answer
39 views

Why can I add a tag to one JPG file and not another in Windows 10?

On Windows 10, I grabbed two files from the Internet. One I can tag on the Details tab of the Properties window, but one I cannot (tagging is disabled). How can I make the other file taggable?
1
vote
2answers
20k views

How to recover pixelated text from JPEG image with Photoshop?

I've got a JPEG image with text on it (badly scanned document), which is hardly readable. I have already played around with the sharpen filters, contrast, levels and the color replacement tool, with ...
4
votes
1answer
126 views

How can I tell if a JPEG was saved as Progressive?

I received a set of photographs from a photographer and need to confirm that the JPEGs were not saved as Progressive JPEGs. I have Adobe Bridge and Photoshop -- how do I check this?
0
votes
1answer
132 views

ffmpeg extract lossless image from video

I have a 5s fps25 mp4 video and I use the following command to extract jpg images from the video ffmpeg -i input.mp4 -r 1 -q:v 1 output_%01d.jpg The images are extracted successfully, but jpg files ...
0
votes
1answer
53 views

FFMPEG under Windows 7(64 bit) - creating timelaps video from jpg

My goal is to create a video from a bunch of jpg files. I have chosen FFMPEG (Windows 64) to solve this task The task I have more than 4k jpg files in a directory, all following the naming ...
10
votes
5answers
3k views

OS X: How to perform a lossless crop of a JPEG image?

I'm looking for a simple way to losslessly crop JPEGs on OS X. Particularly, is there some way to get Preview to perform a lossless crop?
-1
votes
4answers
3k views

Is it possible to embed a keylogger into a jpg image?

I'm curious to know if it's possible to make a jpg file that contains a keylogger that will execute when the image is opened. I strongly believe such thing is not possible, however I'm hearing more ...
0
votes
1answer
158 views

How do I convert a JPEG file into a black and white (1-bit) monochrome TIFF in Ubuntu?

JPEG is a scan of a text document so not much to loose in terms of colour/tones. convert foo.jpg -flatten -monochrome bar.tif gives convert: BitsPerSample 1 not allowed for JPEG. 'JPEGSetupEncode' ...
75
votes
6answers
42k views

Opened a JPG picture with notepad, pasted all the “text” to a new notepad file, changed to .JPG and it no longer opens. Why?

This phenomenon has been leaving me questions to ask. Here is the detailed experiment, my OS is Windows 7 x64 SP1: I changed a picture (JPG) file to TXT by simply changing its extension (or one ...
0
votes
0answers
24 views

selective reading of JPG files on ASUS projector P2B

My projector ASUS P2B is not able to read some JPG files recorded on microSD or USB. Particularly those from SONY A77 (24MP). Usually projector create subfolder with thumbnails, but not in this case. ...
1
vote
1answer
124 views

Recovered JPEG files won't open [duplicate]

I have recovered some photos with Recuva and a lot of them have been recovered fine, however there are some that only half the picture shows and the other half is just grey, then there are others that ...
40
votes
5answers
27k views

Meaningful thumbnails for a Video using FFmpeg

FFmpeg can capture images from videos that can be used as thumbnails to represent the video. Most common ways of doing that are captured in the FFmpeg Wiki. But, I don't want to pick random frames at ...
1
vote
1answer
53 views

Photos do not save after I rotate them in Ristretto

The photos I am trying to rotate are JPEGs. I open them in Ristretto and press Ctrl+[ or Ctrl+]. Even if I press "save copy", the rotated image doesn't get saved to disk! Why? All files have 777 ...
1
vote
7answers
15k views

How to fix an image that doesn't open in Photoshop, even though it opens fine in a browser?

Someone emailed me an image. I see it in Gmail, and I can see it in a browser, but when I try to open it up on Photoshop, I get an error saying: Could not open "XYZ.jpg" because an unknown or ...
11
votes
6answers
19k views

How do I batch convert thousands of NEFs to JPEGs?

I accidentally set my camera (a Nikon D70) to shoot in NEF only and not NEF+JPEG. Obviously, this will be a major pain when I want to go through them all. I don't envy having to wait for seconds at a ...
0
votes
0answers
35 views

How get PPT 2010 to produce 220 ppi jpegs?

I've put together a photo collage as a single slide in PPT 2010 using a custom page size of 20"x16". When I save the slide as a jpeg, I use the Tools>Compress Pictures>Target output option to set the ...
0
votes
1answer
2k views

How to convert PSD to JPG or PNG on Linux with Gimp CLI/batch mode (or other server-side tool)?

I've been working on a theoretically simple web service to convert PSD or AI files to jpeg, png or some web-compatible format. I was able to successfully use ImageMagic's convert -flatten sample.ai ...
6
votes
3answers
7k views

How to convert a photo to a black and white image by ImageMagick?

How can I convert a JPEG photo to black and white (not grayscale) image like output of a FAX scanner, by ImageMagick?
33
votes
8answers
73k views

JPEG vs PNG vs BMP vs GIF vs SVG

I would like to know which one of these formats requires less memory for the same quality of the picture, and what are the main differences between these formats.
1
vote
0answers
688 views

ffmpeg extract I-Frames, GOP to jpeg sequence

This is kind of hard to explain, so bear with me. So I'm looking for some way to export video GOP frames to jpegs. I'd like to preserve the I-Frames, P-Frames, B-Frames, etc. So that the next frame ...
-1
votes
1answer
64 views

Photoshop saves images larger than they were before

For some weeks I am wondering why jpg files I save with Photoshop are extremly big like a 300 x 300 image is around 600 KB even when I reduce its quality all the way down to 0. Its all in RGB 8 Bit so ...
1
vote
5answers
9k views

Saved Visio drawing (VSD) as JPG, how to covert it back to a Visio file?

I have made a class diagram and i have saved it as a JPG from Microsoft Visio. How do I convert the JPG to a VSD file so that I can make changes to it?
1
vote
1answer
157 views

Imagemagick changes page size when converting from pdf to jpg

I want to convert a pdf to jpg. The page size is not standard. (pdf here: imslp) When I convert the pdf to jpg with convert -density 300 sheet.pdf sheet.jpg, I get this: Converted image. (The ...
0
votes
0answers
2k views

How do I edit a JPEG's EXIF data with Gimp?

I would like to edit a JPG EXIF data in Gimp. Perhaps I need a plugin or something, but I don't know how to search for and download the plugin. Plus, when Gimp opens a JPG it converts it to XCF format....
99
votes
8answers
115k views

Batch converting PNG to JPG in linux

Does anyone know a good way to batch-convert a bunch of PNGs into JPGs in linux? (I'm using Ubuntu). A png2jpg binary that I could just drop into a shell script would be ideal.
0
votes
0answers
19 views

How to copy/sync pictures with certain xmp tags only

I want to copy jpg pictures to a matching folder structure (one way syncing) only when they include a certain XMP tag. For example: I have ALL my pictures in a folder structure on drive A. Within the ...
2
votes
0answers
665 views

How to repair corrupt JPEG files

I have 100+ corrupt JPEG files. They were all taken from the same camera. Each file is approx 3MB, so there must be plenty of data to work with. Here is an example of one of the files. (Click here ...