Something related to visual data files

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How to Convert Lossless Rasterized Image (.pdf) to .png by Adjusting -density/…?

Condition: find the minimum number of points for the lossless conversion of a rasterised image (.pdf) to another rasterized image (.png) Example data: https://www.cdc.gov/healthyyouth/evaluation/pdf/...
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1answer
66 views

Random image generator

I am generating random data and trying to convert it to a PNG image using : head -c 1MB < /dev/urandom | hexdump -e '16/1 "_x%02X"' | sed 's/_/\\/g; s/\\x //g; s/.*/ "&"/' | tr -d "\"" | ...
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1answer
14 views

Detect WebP files

I am using Ubuntu and type doesn't seem to work for webp images: bash: type: test.webp: not found How can I discriminate webp images from the command line?
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26 views

Systematically change all visible color in multiple pngs via a script?

I have a large set of pngs to be used as icons for an application I am developing. The icons are all a single color and have a transparent background. Is there a systematic way to change the single ...
2
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1answer
28 views

Silhouette from an image

How can I create silhouette from an image in linux using the terminal? By creating silhouette I mean - how do I turn the RGB components values of an RGBA image to #000000, while preserving the alpha ...
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0answers
9 views

Exporting from digiKam album view to local filesystem?

In the album view I am able to select multiple photos and have the option to export to many many different types of destinations under the 'Export' menu (Dropbox, Flickr, Google Drive, Imgur, etc.), ...
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0answers
58 views

Unix way to extract vectorised image and its graph from a PDF file?

Data: one LHC thesis' page 16, where the picture is vectorised (most probably .eps). I am reviewing the answer here of the thread Software needed to scrape data from graph. I cannot find any tool ...
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3answers
41 views

Is there a way to see the dimensions of a jpeg file in linux using the command line?

I have some .jpeg images saved in a file in a cluster at school. I am at home using PuTTY to access one of the Debian nodes. I'm able to get to the folder with all the images but I need to see the ...
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37 views

How to preserve clearness while converting jpg to pdf file?

I would like convert a jpg file (a photo taken of two pages of a book) to a pdf file, with the goal of making the pdf file look like pages of a regular ebook file in terms of page size and ...
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1answer
88 views

How to display images in OSX terminal

How do I display images in the terminal? I am on Mac OSX mountain lion (10.8.5), and the answers in this question don't work on OSX. Is it possible at all?
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1answer
32 views

Create a pdf from which images cannot be extracted [closed]

I would like to make a PDF (of a Libre-Office document) that has the following properties: The images it contains cannot be extracted and saved; It contains hyperlinks that should be keep on working....
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1answer
137 views

How do i open it .emz files on linux?

I want to view or open .emz file on Linux. EMZ file extension is a Windows Compressed Enhanced Metafile file. How i have to open this file. Any software required? I don't want to convert through ...
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1answer
47 views

How does Raspbian draw images on the terminal?

When you turn a Raspberry Pi on, it displays three (or four) pictures of raspberries in the top-left corner of the screen. Now, as far as I know, you cannot draw images or any other non-text content ...
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4answers
57 views

Programatically determine “uniformity” of image

I'm attempting to write a script which thumbnails our many thousands of assets. The assets use Flash for the most part, and I'm capturing them via chromium-browser on the command line. I pretty much ...
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1answer
53 views

Stop ImageMagick from rotating image on append

I took two photos with my phone, one horizontal and one vertical, and they show up fine in Eye of Gnome. When I try to glue them top-to-bottom with ImageMagick's convert: $ convert img1.jpg img2.jpg ...
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0answers
20 views

Image artifacts on virtual machine

I have installed windows 7 as a virtual machine on my Ubuntu set up. I have 2 monitors, one for Windows and one for Ubuntu. When I open Windows as a full screen I get these strange artifacts after ...
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1answer
29 views

How to use ImageMagick's convert to rescale an image, adding letterboxing to produce a fixed size result?

I have some arbitrarily-sized images for which I want to produce fixed-size 800x600 thumbnails, which keep the original image ratio and add white letterboxing to make up the rest of the space. I'd ...
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1answer
68 views

How can I display image clearly in xterm

All of the open source software that I used,only w3m can display image clearly,I want to try to display image in xterm,how can I accomplish it? I tried 'tput' command to change the color of output ...
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1answer
135 views

Mount .img created by ddrescue-gui

I'm trying to recover data after formatting my hdd. I installed ddrescue-gui and performed the following tasks: Select source (formatted hdd), no log, destination (img file inside separate hdd) and ...
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2answers
71 views

downloading images from webpage with different links

I am trying to download all the images from a webpage. The images are included as follows: <img src="https://alwaysSamePart.com/SomeRandomLinkThatVaries.jpg"> How should I parametrize my wget ...
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2answers
127 views

Display images in console (curses)?

What approach can be used to display an image in a console (no X windows)? For example, I can use curses/ncurses to divide a console into different panes, but in some situations I would like to ...
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0answers
56 views

ARM inforce IFC6540 not booting?

I created an image of the OS on the 64GB SD card by using dd. I did something like sudo dd if=./iforgot of=/media/usb/os/os.image I can't remember the exact stuff I wrote, but I do have the os.image ...
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1answer
143 views

NEF/RAW images too small in geeqie

A while ago I encountered this issue with my favourite Viewer geeqie. My RAW files are displayed too small and I assume it's just the thumbnail which is shown, not the actual image. (It used to work ...
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3answers
137 views

merge two image folders

I have two image folders on my desktop both with around 600 images each. Both folders have some duplicate images and some images with the same file name. How do I merge both together - I do not mind ...
2
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1answer
235 views

Sort & organize a huge heap of photos [closed]

I have 168307 jpg photos in one folder - result of a recovery from an accidentally formatted hard drive. Casual browsing shows that 80% of files have been recovered ok, most even have valid EXIF data (...
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1answer
133 views

Cropping images using ImageMagick results in all output files (TIF) of same size?

I am scanning a rare old book (cookbook) for archiving using my Canon LiDE 110. The scans are .TIF files, and I want to batch crop them for uniformity, et cetera. This is how I am doing the batch ...
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0answers
29 views

Error while installing linux-image-server and linux-image-gerneric

For a web program, I need to install these things: linux-image-server linux-image-generic With the version 3.13.0-37-generic + Here is my command in Debian 7, 64-bit: sudo apt-get install linux-...
2
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1answer
29 views

Semantic querying of local data

Just got told to find some specific pictures for a calendar as a gift. I have thousands of pictures and looking through all of them is annoying. I just realized that the requirements of the images ...
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0answers
16 views

Command to render all images in a dir into one browser window, from term?

Command to render all images in a dir into one browser window, from term? What's a good command from the terminal (I'm running OSX 10.10.2) to render all images in a directory into one browser window?...
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0answers
18 views

What Linux tool can I use to measure font sizes in a PSD file?

I've tried gimp (clicking the texts with the Text tool), but it doesn't work (adds a new text instead of focusing on the existing one). The font information is already there (I've asked a friend with ...
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3answers
265 views

How do I find all square images in a directory

The images are stored in JPEG and PNG files. I want to get a list of those of them that are square.
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0answers
48 views

imagemagick: compositing images with fractional X/Y offsets

Using a one-line imagemagick command, how can the offset of a destination image be defined in relation to the size of the source image? The following command superimposes two images with absolute ...
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2answers
517 views

what is best directory for storing uploaded files / images from my website

i am building a webpage where a the user can upload images. i am going to use the file-system to store my images. i was wondering what is the best directory to hold such data? is it /var/ directory? /...
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1answer
115 views

MimeType Desktop entry for all image files

I want a desktop entry like MimeType=image/ETC to create a context menu action in Dolphin (File Manager in Linux Mint KDE) that would appear only for images. To the question "Is there a generic ...
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1answer
87 views

How to get a position of a specific image within another image?

I have many PNG screenshots with an identical piece of graphic in each of them. The piece has the same dimensions in all of the images. What command line program can I use to find the position of it ...
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0answers
106 views

Metadata preservation when modifying images with ImageMagic

I want to resize, convert or resize + convert images in JPEG, PNG and TIFF in each direction: jpg → tiff, tiff → png, etc. And I want to use -flatten as well. What does ImageMagick do with the ...
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0answers
469 views

Images (e.g. with Clonezilla) of Windows and Linux on a UEFI computer

I use Clonezilla with success for many years to make images from partitions that host Windows 7 or smaller and Ubuntu and other operating systems. Making images and restore them was easy for me. But ...
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2answers
762 views

How to preview image in tmux in iTerm2

iTerm2 is able to display images within the terminal. I'm using the imgcat script and it works fine, but when I'm inside of tmux it does nothing. Is there a way to be able to preview images inline in ...
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2answers
41 views

Create a Linux image

Good Afternoon Everyone! First off I am a Linux nooby, been doing windows administration for several years but recently our company has decided to start deploying RHEL servers. Anyways I have spent ...
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0answers
88 views

Download Hotlinked Images from Forum from Command Line

From the command line, is it possible to download linked images posted on forums? I want to enter the forum thread url and maybe stipulate which image hosts to detect. Also some threads will have ...
4
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0answers
202 views

Replace a image in a PDF using command line

I need to process some PDF files. The task consists in exchange a given image file by another. My first problem is how to replace a PDF image from command line in a batch process. Next I'll try to ...
2
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1answer
866 views

For Loop for Google Image Downloading Bash Script

I have a bash script which downloads images from Google Images. This is the command I use: bash getimages.sh 3 rocky%20mountains That command will download the 3rd picture in Google Images. To ...
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1answer
71 views

Hard Disk Clone Image Size

I've created an image backup for HDDA (partition) from HostA and saved on HostB ssh -c blowfish user@ip-or-hostname "dd if=/dev/sda1 | gzip -1 -" | dd of=sda1.gz conv=sync,noerror The HDD size is ...
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1answer
184 views

Resizing/Processing only images in folder larger than specified height? [duplicate]

I have a folder with JPG images, some of which have a height dimension larger than 1900 pixels. I need a command that will ignore the images with a height dimension lower than 1900 pixels, while ...
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2answers
378 views

shell script to get collect pixel size of image

I'm trying to create shell script that returns the largest picture in total dimensions pixel size? For example: I have many directory over 7000+, each directory have images: dir_1/ picture_1.png = ...
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2answers
1k views

How to batch resize all images in a folder (including subfolders)?

I have huge, 12GB, gallery on the server, full of images in various subfolders. Those files are too big and not used in full resolution. I need to resize all the images down to 820px wide (keeping ...
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3answers
59 views

How can you determine image size from a command line?

I want to keep a collection of images (which arrive via RSS) on a shared network drive (for anyone to have SFW desktop backgrounds). However, some of the images that arrive are absurdly small (85x75, ...
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1answer
165 views

Imagemagick mogrify with shadow geometry

How can I specify the size of a shadow with imagemagick? This command works: montage foo.jpg bar.jpg foobar.jpg -background lightgray -geometry 1031x1642+57+57 -shadow -monitor -tile 3x1 out.png ...
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1answer
36 views

To plot 7x10 pictures for review in video

Assume you have 77777 pictures. You want to review them and their differences: have 7x10 pictures without margins to have an image viewer where the minimum browse time can be less than 1.0 s such ...
0
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1answer
137 views

Linux Bash resize image half the size (linear)

I'm trying to come up with a way of resizing images in a directory by half (longways). I have already used: mogrify -resize 50% * It does resize all the image in the file but width and length ways....