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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48 views

Convert jpeg quality to 80% using automator

I want to make a automator script that goes trough a folder with subfolders and convert all .JPEG (or .JPG) to the same JPEG, but with a quality of 80%. There is no option in Automator it self like ...
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2answers
56 views

What kind of image compression causes this color banding? [closed]

I have two images. The first is before undergoing lossy compression: Picture #1: The second is after undergoing lossy compression: Can anyone explain to me what is going on here? How does this ...
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1answer
30 views

Can't View Thumbnails when trying to open JPEG files

In Photoshop, I put in a CD with my images, when I try to select a file, I can't view the thumbnails. Only the Photoshop icon! It showed the actual picture before, and all of a sudden it stopped! ...
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1answer
48 views

JPGs seem corrupted on Arch but are good on Fedora and Windows7

I re-installed Arch on my computer (clean install). Since then when copying images (JPG) and movies (mov) from SD card they seem to be corrupted. When rsync-ing to the computer some of the files ...
2
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1answer
42 views

PNG or JPEG for an X-Ray without visible artifacts

A past paper question from a Multimedia Systems exam: If you had an X-Ray photograph of a leg which might be broken, which would give better compression before artifacts were visible, and which ...
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3answers
429 views

Does the JPEG file format support RGB data?

I am doing some programming that involves encoding image data using WIC. I used RGB data but WIC always treats it as BGR. I have a related question on Stack Overflow dealing with the programming ...
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0answers
65 views

Unable to open invalid jpg file

A few days ago I took pictures from my camera and uploaded them to my computer. Now the photos that I took few days ago was appear to be corrupted or invalid format. I have tried use third party ...
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0answers
56 views

fix a corrupted JPEG file? [closed]

The most frustrating thing happened, I was rotating an image on my phone from an SD card and the SD card was "suddenly removed" or knocked out of place in my phone and the image was deleted. It wasn't ...
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0answers
43 views

.png images load great - .jpg images are blurry on website

I've searched around and found lots of information about blurry images and I've implemented some of the fixes I found and it worked on about 50% of them. I'm posting Android apps and iOS apps - all ...
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0answers
86 views

Corrupt CR2\JPEG file - correct size but all zeros in Hex editor

I have an SD card with some RAW images (.CR2) and JPEG's that show the correct size but won't open (invalid image). Hex editor shows all zeros in these files. Before you answer the obvious "All zeros ...
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0answers
37 views

Saving Images as Filenames in Excel

I have a product information sheet from a supplier that needs to get uploaded into an ecommerce platform. However, the spreadsheet contains actual images in the image column instead of filenames. I ...
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0answers
32 views

How to display a fragment of an image file using Scalpel

I am working on a demonstration using Scalpel and its abilities to carve out image files. I took a small thumb drive and filled it with many small sized files until it was full. I then went and ...
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0answers
28 views

Windows: how to enable tags on old image files?

I have a lot of old photos which I want to tag. For cross-platform compatibility, I want to use IPTC Keywords for tagging. As far as I read, the native Windows photo tagging capabilities use IPTC ...
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2answers
40 views

JPGs created with Imagemagick won't display on TV

I am trying to convert a free ebook from PNG to JPG, so I can read it on my Sony Bravia KDL-40R470. This is how I converted the PNG file: convert -density 117 -quality 80 progit.pdf progit.jpg ...
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0answers
30 views

Exporting image in a specific Meter:Pixel scale from AutoCAD

I have a .DWG model which I would like to export from AutoCAD as an image (preferably JPEG) with a specific scale of (lets say) 100 pixels per 1 meter (1:100) The overall size of the image should be ...
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1answer
143 views

create video from single jpg and no audio

For a time lapse video project I want to create a header (with some title text). The header is just one still image which I give as jpg. I have seen other answers that produce still image video from a ...
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0answers
37 views

Check corrupted pictures on Synology?

On my computer I use the jpeginfo command for checking if my pictures are corrupted or not. I am trying to use the same command on my Synology. I tried to manually install jpeginfo on my DS212 ...
0
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2answers
122 views

Can TIFF images store embedded thumbnails in them like JPEG (JPG) files can?

Can TIFF images store embedded thumbnails in them like JPEG (JPG) files can? I noticed that in XNview, when you save a TIFF image there is an option to set the JPEG quality (of the TIFF image). ...
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0answers
35 views

jpegtran says “Unsupported marker type” when trying to open a file. How to remove unsupported markers from it?

I have a photo, it opens fine in image viewing software (such as Preview.app), but jpegtran (MozJPEG 3.0, not specific to this version) refuses to work with it, saying "Unsupported marker type 0xfa". ...
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1answer
2k views

Search for a JPG on my computer by using a smaller JPG?

I have a low resolution image that I know I have the full resolution image stored somewhere on my computer. Is there anyway to search for a JPG on my computer by using a small resolution of an image ...
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1answer
112 views

guess the secret text inside a jpg file using outguess in linux

How can I get the secret content of a jpg file using outguess command without knowing the passphrase ? Before all is it possible to do so, guessing the content using outguess in linux without knowing ...
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0answers
40 views

trying to open damaged jpeg images

I have jpeg images that have been recovered on my computer but I cannot open them. I presume they are damaged. I have tried using Jpegsnoop and also Format factory 3.34 but cannot open them. I tried ...
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1answer
220 views

PHPFarm with jpeg integration

So I'm attempting to get phpfarm up and running, but for some reason can't get jpeg support from gd to work... Here are my config options configoptions="\ --enable-bcmath \ --enable-calendar \ ...
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0answers
52 views

Broken pdfs after extracting from ods file

I have several xls files with lots of embedded pdfs in them and I need to automatically extract them. I have an almost working solution for this. First I convert these xls to ods using LibreOffice, ...
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1answer
330 views

Use ffmpeg for JPEG to TIFF conversion

I would like to use Tesseract OCR with a video. With ffmpeg I can export some (.jpeg) images from a video. Can I convert a .jpeg into a valid .tiff or export directly .tiff images from the video with ...
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2answers
721 views

JPEG images are pixelated on browsers (websites)

Almost all jpg images on web pages are pixelated. I've tried other browsers and it's the same. Only JPEG images that get pixelated. PNGs display well. This comparison image preview is a screenshot ...
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0answers
79 views

FFmpeg - Converting JPG to AVI issue

I'm having an issue converting jpg files to avi using ffmpeg. I use this command: ./ffmpeg -start_number 1 -i ~/PycharmProjects/images/test/img%04d.jpg -vcodec mpeg4 test.avi My files are named ...
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1answer
1k views

How to find/detect hidden files inside JPEG file?

I'm trying to find out what is a good way to detect whether an image file has other files hidden inside it? related link: Hide files inside of JPEG images at lifehacker
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1answer
210 views

Microsoft Visual C++ Runtime error when viewing JPEG files in Explorer

I am getting the following error each time I view JPG files in the windows explorer in Detailed view. It also appears when you open the properties of the file. I'm using Windows 8. Microsoft Visual ...
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1answer
106 views

Why there are JPEG files with weird file names in folders with videos

Windows 8.1: 64-bit. Since couple of days I see that that in every folder containing a video[s], found a JPEG file with a weird name followed by a file name of a video in the folder. + Is that ...
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2answers
279 views

Append Script to an Image

I have a JPG image. I want to add/append a small piece of script(It can be of any language like PHP,Javascript,etc), but the image extension should not be changed. It must be jpg itself even after ...
1
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1answer
3k views

7-Zip: Unsupported Compression Method while trying to extract a zipx file that consists of JPEGs

A zipx file I received consists of .csv files and .jpeg files. I used 7-zip to extract them. While the .csv files were sucessfully extracted, the JPEG files didn't. The error was something like this ...
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0answers
18 views

Software to link up photos in a line to form one image

I have several (around 50) photos of multiple sections along a river, each with a metre stick in the photo for scale. I need a way to link these photos up in a single image, whilst being able to crop ...
72
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6answers
26k 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 ...
9
votes
2answers
715 views

Can we change size of an JPEG image with out decoding and re-encoding it?

I want to convert a 640x480 JPEG image to 320x240. I know it can be done by decoding the JPEG image into raw YCbCr, scale it and re-encode it into JPEG. But is it possible possible with JPEG encoding ...
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2answers
482 views

How can I achieve the maximum zip compression? [closed]

I would like to make a "standard" zip file which contain .jpg images. Which software and switches / options should I use to achieve the maximum compression ratio? I mean maybe I can make a solid ...
1
vote
1answer
296 views

Why does ImageMagick's montage limit the JPG output to 65500 instead of 65535?

JPEG/JFIF supports a maximum image size of 65535×65535 pixels. Is there any reason why ImageMagick's montage limit the JPG output to 65500 instead of 65535?
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0answers
86 views

How to scan documents into Windows 8.1 as JPEG images?

I recently updated my computer from Windows 7 to Windows 8.1 and downloaded an up-to-date interface for my Brothers MFC-J825DW printer to accommodate scanning documents. Unfortunately, now when I ...
2
votes
1answer
1k views

JPG image not opening?

This image didn't open in photoshop, paint, MS office or windows photo viewer but it simply opens in chrome. What's wrong with this image?
0
votes
1answer
397 views

How can I convert a large PDF to PNG?

I want to convert a very large PDF file (>2GB) to a PNG (or JPEG) file so that it is easier to open and look at. I want to do that without opening the PDF file since it is too large to be opened. Is ...
0
votes
0answers
1k 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 ...
0
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0answers
56 views

jpg repeating gif imagemagick

so this is my first post on Stack Overflow after years of being a read-only guy. This time i have hit a wall and can't really get past it and would really appreciate your positive response. This is ...
0
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2answers
592 views

Load file automatically on start up windows xp

I have a few text files that I want to see every time I turn on the computer, like Post-It notes. So basically as the title says, how can I configure Windows XP to load specific files on startup?
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vote
1answer
813 views

Imagemagick killing colour quality when resizing image

I'm trying to resize a bunch (450+) of images through imagemagick, they all start at 500x500 and I've written a script to resize them to about 5 different sizes. Now I've converted them I notice that ...
0
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0answers
144 views

ffmpeg: converting jpeg image sequence to movie gets error “not enough frames to estimate rate consider increasing probesize” [closed]

I have an image sequence with a numbering system of: image-00001.jpg. I want to convert this to a movie using ffmpeg. I always get the error in the title no matter what I do. Below is the syntax I'm ...
1
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0answers
215 views

Image optimization: Photoshop CS6 vs jpegtran / OptiPNG

Is there any difference in terms of algorithm for optimization between Photoshop's Shift+Alt+S (save for web) and jpegtran's -optimize and -progressive? It seems my images are not reduced (or reduced ...
5
votes
3answers
2k views

How to automatically rotate images based on EXIF data?

I know how to do it manually. Now I would like to automate that based on EXIF data. I already have exiftool installed, but looks like it can only read the data, but can not rotate the image. There is ...
1
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1answer
830 views

Apply jpegtran.exe to directory

I am trying to optimize a directory of images with jpegtran.exe but I can't figure out how to make it work. Does anyone have experience with this? I found this article about scripting jpegtran but ...
1
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1answer
640 views

How to remove string from JPEG files using find?

I have many files in many media catalogs with some string and I want to remove this string. The string is contained inside JPEG files and looks like: ...
0
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2answers
486 views

Watermark does not show in Windows Explorer

I have noticed that on certain photos with watermarks, the watermark will show in programs like Windows Photo Viewer and Paint but not in Windows Explorer. Here is an example photo and related ...