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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convert serveral image files to a single djvu file

Suppose I have serveral BMP image file, say 001.bmp, 002.bmp,..., 100.bmp. I want to convert these files to a single djvu file, whose first page is the content of 001.bmp, the second page is the ...
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3answers
608 views

How to make multiple copies of the same image, but with different filenames?

Shortly, I'll be required to rename 22,000 .jpg files from imagereference.jpg to itemcode.jpg. The rename itself isn't a problem, the issue lies with several thousand of the images are currently ...
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8answers
7k views

Stop Windows 8 from converting wallpapers to low quality JPGs

This has been bugging me on Windows 7 as well, and much to my chagrin Microsoft didn't bother addressing that issue in Windows 8. Take this image for example: (Click to open original unaltered ...
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1answer
81 views

Most space-efficient format for image with large dimensions but few colors?

Recently I have had to scale up the dimensions of a gif image by a factor of 2, this resulted in an increase of the file size by about 8 times. While this is not a complete surprise, I can't help but ...
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3answers
175 views

Particular jpeg image does not preview in Nautilus and cannot be uploaded

I have a group of .jpg images from the same source that all seem to behave fine: I can open/edit them with eog/Kolourpaint/GIMP, their thumbnails load correctly in Nautilus, etc. However, when I try ...
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2answers
727 views

Google Chrome displays some gray jpgs with pink overlay

The problem appears on site http://ui-cloud.com/ and a lot of other. If I save the image from the site and open it in some image viewer app, then image displays correct. Also all other browsers in ...
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2answers
349 views

Automating the choice between JPEG and PNG with a script

Choosing the right format to save your images in is crucial for preserving image quality and reducing artifacts. Different formats follow different compression methods and come with their own set of ...
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2answers
998 views

Kaspersky Internet Security corrupts chunked HTTP data

When I visit the web-page http://www.ol-in-berlin.de, the random image on the left (http://www.ol-in-berlin.de/module/startseite_bild.php) is not displayed correctly. It happens with Firefox 16 as ...
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357 views

Incomplete jpg or image files?

One of my tools didn't work properly and i have a lot of image files that isn't complete (50%, 70, it varies). What is a command line tool or lib (C++ or .NET, .NET preferred if not command line) to ...
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1answer
343 views

How do I achieve lossless JPEG joining without truncation of partial MCUs?

I am working on a project for which I need to join thousands of JPEG images losslessly (I'm not talking about the Lossless JPEG/JPEG 2000/JPEG-LS formats here). Aforementioned images have varying ...
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3answers
4k views

How to compress / reduce the size of JPEG photos for archiving?

I have 50,000 high resolution JPEG photos, where a couple of them might occasionally be needed, about once a year. I wanted to zip them to save disk space, except that zipping gives no space benefit ...
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2answers
330 views

aview: Invalid magic-not p?m family format

I am simply trying to use aview to display a simple JPEG image using the terminal, however every time it returns this error: Invalid magic-not p?m family format It happens with other files of other ...
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2answers
567 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. ...
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0answers
404 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 ...
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2answers
1k views

Progressive JPEG quality compare to normal JPEG?

I'm trying to convert some BMP files into JPEG format at highest quality (Q = 100) until I realize there is a "Progressive" option here. One of my BMP file is 2.9MB. After converting to JPEG format ...
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2answers
1k views

jpeg: reduce picture size without changing resolution and quality

I'm trying to reduce file size of a bunch of JPEG files, say 1280x720. Without changing the resolution and the visual quality much, what are the recommended approach?
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0answers
368 views

A way to perform lossless JPG edits in Adobe Photoshop CS6?

I perform lots of small edits of JPGs daily on my computer, and was wondering whether there was a way to perform cropping and rotation without the loss of quality during recompression. I know there ...
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1answer
85 views

How do I find out what the file-type of an image is?

I have image that is not opening. However online convertors are able to convert it. How do I retrieve the image format? When opening file in text editor, the following information may be found: ...
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182 views

PDF to JPEG conversion algorithm

I was wondering how the snipping tool works while cropping any vector image, for example an image on pdf file, to jpeg file. Does it use rasterization? Is there any way to convert an image on a PDF ...
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3answers
16k views

How to split a mp4 video into jpg pictures? [duplicate]

I have a video(with 4 min) in mp4 format(probably MPEG-4) that I need to convert into a lot of pictures(jpg's). I would need to take a lot of Print Screen and paste on MS Paint to manually do that, ...
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2answers
741 views

OS X says “they standard extension is” .jpeg, but according to who?

When I attempt to save a file as "picture.jpg", OS X unhelpfully informs me that the standard extension is ".jpeg". I think the bazillion .jpg files on the web beg to differ, so where does Apple get ...
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1answer
128 views

JPG compression setting for consumer-quality vacation photos?

When I'm saving a JPG file, Paint Shop Pro (Windows) and Gimp (Linux) show a pop-up to choose the JPG compression level. The apps have something like 85 as default value, and I think reducing the ...
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1answer
1k views

How can I modify the EXIF orientation tag of an image?

I want to change the EXIF orientation tag in my JPEG images but without actual rotating of them. I want to do this to use them as a test case for an application I made. How I can do that in Linux? ...
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2answers
790 views

Gimp reports huge file size (in the GB range) when trying to export to JPG

If I load a JPG file (2-4 MB in size) into Gimp for photo manipulation and try to export it, Gimp reports the file size will be in the region of 1.3 GB! I have to export it as PNG, which results in a ...
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2answers
245 views

PC to Mac picture transfer not working, done through networking. Mac cannot see the photos

I have a Windows XP Pro desktop and a Mac laptop. I connected the laptop to the PC with an Ethernet cable. I then picked the folder I wanted to transfer over and I "shared" it. I then connected with ...
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4answers
522 views

Losslessly compressing similar images?

I need to reduce the size of my photo library so I naturally want to compress them. Many of them are not quite identical, but still very similar (subsequent shots of the same scene). Is there any ...
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2answers
763 views

Getting N jpeg images from N-Pages PDF

I've a PDF composed by N pages. I want to convert this PDF in N jpeg images (by command line, no Php, Java or other programming languages). I'm trying to do this with GHOSTSCRIPT but the output ...
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1answer
2k views

Linux convert jpeg to bmp, xsetroot complains “bad bitmap format”, how to fix this?

I am creating a JPEG file, converting to BMP then using with xsetroot, but that is failing. 1) Make a JPEG file $ convert -size 800x600 xc:transparent \ -font Bookman-DemiItalic -pointsize ...
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3answers
2k views

How to batch-convert JPG files to uncompressed TIFF

I need to collect 1000 uncompressed TIFF files. I have a large set of JPG images, so I decided to convert them to TIFF format. The loss in quality is ok in this case for me. I used the following ...
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2answers
160 views

How to save a series of JPGs as an AVI at 30fps? [duplicate]

Possible Duplicate: How to turn images into a video slideshow with sound I have a series of JPGs that were from a video file. They are named according to their frame number. How can I put ...
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1answer
3k 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?
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1answer
949 views

brew link jpeg issues

I am trying to install opencv on Mac OSX Lion. brew install opencv I get the following error (and a few other similar ones) Error: The linking step did not complete successfully The formula built, ...
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2answers
117 views

Photoshop issue saving image as lesser filesize then reopening and saving again

This is driving me absolutely mad. I save for web at 100%. I open back up. I save again at 100%. It is bigger than the last time. It keeps doing this over and over and over it could be infinite ...
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10answers
3k views

Reducing image size on Windows XP

I have a scanned JPG file and due to high quality scanning, the file size is large. What I would like to do is reduce the image size of the file, keeping the jpg format, but losing Quality obviously. ...
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0answers
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What is the difference between jpeg Progressive and Optimized in photostop?

When saving a image for web and devices as JPEG, I can either choose progressive or optimized (or none). What is the difference between both and what should I use ? In my case, the image is the ...
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2answers
2k views

If I convert my file to PSD to JPEG, does it remember the width and height of the picture?

So I'm doing some card invites on my computer. I'm using photoshop, and I've got it with the height and width that I want to print it out. The only problem is, I'm going to have to take the file to a ...
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2answers
6k views

Print jpg's with file names

I have MS Office 2010, Windows Paint. Prefer to print multiple photos on a page with their filenames. Any suggestions? I am using office computer so I cannot install any software.
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1answer
41 views

Missing extension - explorer issue?

In this picture, right at the bottom you can see Files of type: Then it says Pictures (*.bmp, *.png, *.jpg, *.gif) My question is, how can I add the extension .jpeg in there?
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3answers
4k views

Convert Multi-Page PDF to Single JPEG or TIFF File on Mac

I am trying to submit a paper to an academic journal. My file is in PDF form. Unfortunately, the journal only accepts papers as JPEGs or TIFFs. I can turn a single page into a JPEG using preview. ...
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1answer
181 views

Fixing texture with JPEG artifacts?

I have this texture: That I really want to use. The problem is when I zoom in to it, it is full of JPEG artifacts and does not scale nicely. I tried a few noise reducing plug ins but they did not ...
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2answers
71 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 ...
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1answer
861 views

Using convert to covert multiple jpg files to pdf - pdf quality

I used the command convert *.jpg out.pdf to convert multiple jpg files to pdf. But the quality of the output pdf is very low. Is there a way I can increase the quality?
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4answers
8k views

Is there any drawback to just renaming jpeg files to jpg?

A client sent me many jpeg files that I'd like to rename to jpg. Is this just a matter of renaming them, or should I open them with an image editing program and then saving them as jpg?
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0answers
419 views

Join Audio and 2 Images Output as Video using FFmpeg and Video should be acceptable by youtube

I know this question is similar to the question here Join Audio and Image -> Output as Video using FFmpeg, But my requirement is bit more. I want to join to 2 image files with an audio file to ...
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4answers
10k views

How to batch combine JPEG's from folders into PDF's

I have a about 500 folders with images inside. Is there a way I could batch convert this so that I get .pdf files that contain all images inside as pages? EDIT: There should be 500 PDF's created, ...
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1answer
250 views

GPS metadata in images

I know that in JPG and TIFF images GPS location is (can be) stored in the Exif data. Are there any other formats that provide GPS location in metadata? I looked through the PNG specification and ...
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3answers
4k views

How to make a photo bigger?

I've downloaded a photo with a pixel size of 300x366. It is a jpeg, at 27.7Kb. How can I enlarge the image's size, without distorting it? Using Paint doesn't seem to work for this.
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2answers
3k views

JPG files are too small when converted from PDF with imagemagick

I'm on Ubuntu 10.04 with imagemagick. I used this command: convert myfile.pdf -density 300 file.jpg This works well, but the JPGs are only about an inch high. How can I preserve the paper size in ...
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1answer
248 views

Image to PDF quality

I am converting multiple jpg images to a single PDF using following command convert *.jpg mybook.pdf but the pdf quality is not good. Is there a way to retain the original quality of images in ...
0
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0answers
390 views

Convert JPEG image to MPEG-2 Video

I am working on a digital screen unit which has a 2-3 second delay with still images, but no delay for MPEG-2 video. I have used Photoshop CS5 to export the JPEG into MPEG-2 (MP4(ISMA)), but the ...