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Questions tagged [image-processing]

Manipulating and processing static images, techniques and software for such tasks.

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Libisofs build error when using xorriso

Currently, I am trying to build Ubuntu 24.04 with xorriso, but failed with following error output. The Ubuntu I used is a daily build version: https://cdimage.ubuntu.com/daily-live/current/noble-...
Alex's user avatar
  • 1
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0 answers
13 views

Trouble Reimaging Ubuntu on MSI Cyborg Laptop

I need help reimaging Ubuntu on my MSI Cyborg laptop. I'm aiming for Ubuntu 20.04, but I'm encountering issues. It seems like the root file system is undefined. When I attempt to mount the partitions (...
Luciana Madrigal's user avatar
-4 votes
0 answers
41 views

How to convert a folder with images with the extension .tmp (for some reason) to jpg, in Ubuntu 22.04? [duplicate]

I searched the web for a solution and I was greeted with the following errors in the Ubuntu terminal, when using the following commands: convert *.tmp *.jpeg convert-im6.q16: unable to open image `*....
Nuno Fonseca's user avatar
3 votes
1 answer
407 views

Batch convert images in avif format to dng format - how?

I have a bunch of avif-files that I want to convert to dng - as the software I want to use to work on the images does not accept avif - and I don't want to use jpeg. Any ideas? Thanks!
sers's user avatar
  • 131
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Command-line utility to find and prompt to delete duplicate images (including resized ones) similar to fdupes? [duplicate]

I am looking for a command-line utility to find duplicate images (including resized ones) and prompt me to choose which one to delete. My cloud backup process seems to generate photo duplicates, some ...
Timotheos's user avatar
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0 answers
20 views

Software for building mosaics from irregular shapes

Do you know any software that can build mosaics resembling original picture from collection of irregular shapes? Something doing what 'real' mosaic actually is. Let's say source shapes are given in ...
Nikolay Kovshov's user avatar
1 vote
1 answer
371 views

how to find all pictures with a certain aspect ratio in a directory and its subdirectories

I need a method to find all pictures with a certain aspect ratio, for example 16:9 , such as 1920x1080 1280x720 944x531. I found this page How to find all images with a certain pixel size using ...
Usermaxn's user avatar
  • 207
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1 answer
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Is there a program to make an image sharper?

A friend sent me a picture from 1980. It's not that clear. I was wondering if there was a program that can make it sharper?
P Simdars's user avatar
  • 257
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90 views

Software/tool for simple image stitching/mosaicking?

I have several images (more specifically: map tiles), which overlap one another to some degree (not 100%). I would want to automatically mosaic or stitch them into a single, homogeneous image. One way ...
Michael's user avatar
  • 91
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1 answer
183 views

How to move a file to the desktop using the terminal?

I want to add an image to the desktop to get information about it with exif, but I don't know how to add the image in desktop or how to copy it in a terminal. I'm learning how to use the terminal and ...
hamidi fouad's user avatar
0 votes
1 answer
172 views

ImageMagick-6, how to adjust brightness of background only of scanned page, without touching the text

I have a pictures of scanned book, jpeg format. All pages have gray backround with some noise, due to grayscale mode used when scan. ImageMagick-6 Image info: Resolution: 200x200 Colorspace: Gray Type:...
Lexx Luxx's user avatar
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2 answers
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default Ubuntu lossy photo or photos compression method

I prefer to backup ~/Documents to a tar file and move that tar file to a removable solid state drive. After many years of collecting data, my tar file is approximately 4 GB which is nice since I can ...
H2ONaCl's user avatar
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0 votes
1 answer
898 views

How to resize an image using ImageMagick

From How to easily resize images via command-line? I know I can use this command to resize an image in bash: convert -resize 1024X768 source.png dest.jpg But I'm stuck at only providing the width ...
Saeed Neamati's user avatar
1 vote
1 answer
226 views

Batch convert multiple, specific images spread across dozens of folders

I have a list of JPG files, each located in different folders on my command line only server, that I need converted to PNG. I know the simple command to convert them one-by-one using mogrify. But I ...
Matt's user avatar
  • 111
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1 answer
188 views

How can I use montage to concatenate 3 images so that they form an "inverted triangle"?

I'm trying to use montage to concatenate 3 images so that 2 are placed on top and one on the bottom in the middle, so that the overall shape of the concatenated images is kind of like an inverted ...
An Ignorant Wanderer's user avatar
0 votes
2 answers
486 views

qmake problem with image converter on 22.04

I am trying to install "lcd-image-converter" onto my Ubuntu 22.04 only laptop but I cannot get qmake to work. Initially I kept getting the warning qmake: could not exec '/usr/lib/x86_64-...
SteveInBavaria's user avatar
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1 answer
56 views

What are the free Image processing tools available to manipulate image regions and entire pixels?

I am working on an image task where I have to manipulate the regions and pixels in images. I need the tool to do 3 major task: Draw a rectangle box on the image Pick any pixel colour from the image ...
Deshwal's user avatar
  • 113
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0 answers
43 views

choosing the best pose for multiple people in a burst of similar photos

When I'm taking a photo of multiple people I usually take a bunch of quick photos in rapid succession in hopes that one of them will come out with everyone looking good. Not blinking, smiling if that'...
Adam Monsen's user avatar
  • 2,225
2 votes
2 answers
1k views

Creating AVIF or HEIC images with transparency does not work with ImageMagick in 22.04

After upgrading to Ubuntu 22.04 I was pleasantly surprised that creating images with the new AVIF or HEIC formats was supported by default. It's a breeze. convert image.png image.avif convert image....
Janghou's user avatar
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1 vote
0 answers
72 views

Image Corruption with Screenshots on Xubuntu 20.04

Whenever I try to upload an image that I saved with the Screenshot tool I get a corrupted looking image: Example of corrupted image: This seems to happen primarily when trying to upload/paste from ...
lowang's user avatar
  • 11
2 votes
1 answer
97 views

Looking for software simimar to Cam Scanner

I have a lot of pictures from an historical archive. I need to crop them and to flatten them or to apply some perspective. Also, I'm looking for a software that allows me to work this with a great ...
Jorge Luis Ávila Escamilla's user avatar
-1 votes
1 answer
241 views

Automatically adding a number to each image in a directory

I want to display a number on top of each image, for all image files in a directory. In other words, each image is modified to contain a box containing a number. How can I automate this?
Per Christian Henden's user avatar
0 votes
1 answer
246 views

How to save a QR code generated from the Electrum Wallet directly as a PNG or JPG file?

How do I save and send the QR code: as a jpg or png? There are ways to use gimp and/or xclip but I would hope that I can just save the QR code directly to file. Is this possible? Notably, Windows ...
Nicholas Saunders's user avatar
3 votes
1 answer
34 views

What is "Software" field in image file properties?

When we right click on a jpg, a modal "Properties" form pops up. One of the tabs is named "Image". On this tab, for most of my jpgs I see the following property names: Image Type, ...
Phil Freihofner's user avatar
1 vote
0 answers
90 views

How can I run Photocollage on ubuntu 21.10?

Photocollage makes a bigger combined image from a number of specified inputs. Maybe not a straightforward program, but it used to work. Now, under Ubuntu 21.10 it segfaults immediately. The program is ...
Bernt Ribbum's user avatar
2 votes
0 answers
76 views

Unable to see images or screenshots of applications in Software Center

In the Ubuntu Software Center app, I am unable to see images of each application or the screenshots: Do you know how to resolve this issue?
Pauline Swatman's user avatar
2 votes
1 answer
892 views

convert bunch of images to black and white with overwritting existing images

I need to convert a bunch of images (about 1000) to black and white I used the following code: convert *.bmp -monochrome ./*.bmp but it produces new images. for example, I have file1.bmp, file2.bmp ...
Elahe Kamel's user avatar
2 votes
3 answers
1k views

Crop a specific region from a series of images

I have a series of png-images (actually they are taken from an mp4-file). I want to crop the same region from all the images I have taken. What tool is best for that, such that I can define the region ...
Adalbert Hanßen's user avatar
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0 answers
162 views

Nautilus resize to increase image size does not work with Scale option

With Ubuntu 2020.04.3 (Focal) I used Nautilus resize (i.e. right click the file in Nautilus) to increase the image's size using the Scale option. It creates a resized image file with the same number ...
John Rose's user avatar
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0 votes
0 answers
110 views

How to Convert 2 Image to 1 Page PDF With terminal?

I have a question, I have a problem, I want to change 2 images in 1 page pdf, how do I do it? I tried this command convert *.jpg -resize 1240x1753 \ -extent 1240x1753 -gravity ...
Joe Cola's user avatar
  • 343
16 votes
4 answers
4k views

Get printer-ready black text on white background in scanned pdf files (remove grayscale or color background)

How can I turn photos of paper documents into a scanned document? is related, but not the same, as I'm talking about pdf files. The processing of images seems complicated in the answers under the ...
cipricus's user avatar
  • 3,434
1 vote
2 answers
1k views

How to convert 32MB of PNG file to 200Kbs without losing its colors

I have couple of images that are of 32MBs of size and I want to change their size from 32MBs to 100Kbs or any KBs of size without affecting its colours. The commands I am trying are: muhammad@muhammad-...
LearningROR's user avatar
3 votes
1 answer
3k views

Resize image to specific size

I know there are several ways to resize an image via the command line. Some of them are specified here. However, I was wondering whether there is a way to specify the size of the resized image, e.g. I ...
hyhno01's user avatar
  • 45
9 votes
2 answers
11k views

How to bulk convert NEF/RAW images to JPG and remove original images?

I want to convert all NEF/RAW image files to an image format that could be easily opened without additional tools. I thought about using ImageMagick's convert tool as mentioned in How can I convert a ....
matandked's user avatar
  • 1,129
0 votes
1 answer
883 views

Windows style snipping tool on linux [closed]

Is there any snipping tool available on linux that's similar, or works similarly to win10's? I mean, using a button combination to bring up the snipping tool box (like win10's win + shift + s) and ...
Lha's user avatar
  • 3
2 votes
0 answers
364 views

Converting JFIF standard jpg files to EXIF standard jpg files in Ubuntu

How can I convert JFIF standard jpg images to EXIF standard jpg images in Ubuntu 20.04 preferably via command line if possible?
Mona Jalal's user avatar
  • 4,565
1 vote
1 answer
838 views

How to resize images to either 900-pixels-height for vertical ones or 900-pixels-width for horizontal ones?

I have vertical (i.e. height > width) and horizontal (i.e. width > height) images. I want to resize them to either 900-pixels-height vertical ones or 900-pixels-width ones based on their ...
hlee's user avatar
  • 115
0 votes
0 answers
507 views

How do I batch convert images from sRGB to CMYK with a specific ICC profile?

I have a few hundred sRGB .tif files that require conversion to the CMYK FORGRA52 ICC profile. I tried using the software XnConvert, but this doesn't work (I don't think it supports conversion from ...
user avatar
2 votes
3 answers
2k views

How to automatically print multiple images per page?

Using an Ubuntu linux, what is the best/easiest way to print multiple images per page? The global number of images and pages and the requested number of images per page should be dynamically chosen.
Nicolas's user avatar
  • 857
1 vote
3 answers
4k views

Image viewer that can display all ICO sizes in a file

What are the image viewers available in Kubuntu that are able to display all ICO sizes in a file? In Windows 7 Picture Viewer, I can use PAGE UP / PAGE DOWN to navigate on the "mipmaps" (or ...
geekley's user avatar
  • 549
4 votes
3 answers
1k views

Application for simple and quick drawings

I am using Ubuntu 20.04 and I need you to suggest me an application to make simple and quick drawings. I need the application to support common image formats and allow me to quickly add text, crop, ...
emil.zimmer's user avatar
3 votes
2 answers
8k views

How to view .HEIC photos from iPhone IOS 11+ on Ubuntu?

Friends send me email with attachments containing .HEIC pictures from their iPhone. How can I easily view these pictures on Ubuntu?
heynnema's user avatar
  • 70.8k
1 vote
1 answer
997 views

How to convert 1280x720 .jpg files to 640x240 .ppm files using ImageMagick's `convert` command?

I have some image files (width: 1280 px, height: 720 px, colored, .jpg) and I want to first reduce them to half both vertically and horizontally, i.e. to 640x360 px, and then I want to cut 120 rows (...
Chan Kim's user avatar
  • 1,991
2 votes
1 answer
2k views

AVIF editor recommendation

Any recommendations for an image editor that can save in avif format? I am interested in outputting avif format files directly, without having to go through a secondary conversion process.
Amblymoron's user avatar
0 votes
1 answer
82 views

Different amount of loss after same processing on any image in Ubuntu 18.04 vs Ubuntu 20.04

When I load an image via PIL in Python3, save it and then load it again, I get different values in Ubuntu 18.04.5 vs Ubuntu 20.04.1. I understand that re-saving an image will alter the values due to ...
Neeraj Kumar's user avatar
0 votes
0 answers
89 views

Software That Quickly Joins Images?

I often find that I have to join images together in a certain order, with a given number of rows and columns, so I am often finding myself using this website. I was wondering if there is some software ...
Harry Chittenden's user avatar
2 votes
1 answer
1k views

Use `ffplay` to play images in a folder by file orders

ffplay is a tool to play images inside a folder without saving a video. See command options here But the problem is the filenames in my folder do not have a pattern, as they are sampled unevenly. Let'...
null's user avatar
  • 183
1 vote
1 answer
641 views

How to find image on screen

How to find coordinates of image file on screen, if it present on screen, from command line? Its needed for bot what clicking button in firefox-flash, button have different coordinates from time to ...
LeonidMew's user avatar
  • 2,734
0 votes
0 answers
527 views

Zero-padding of output file names in gif->png conversion from ImageMagick

I have used this great answer to convert a .gif to its constituent frames: convert foo.gif foo.png My intention was to do some edits to the frames on the command line before combining them back as an ...
MichaelChirico's user avatar
0 votes
1 answer
384 views

Ubuntu 20.04 Desktop Not Treating .JPG Extension As An Image; Doesn't Create Thumbnail

My Ubuntu 20.04 desktop isn't treating .JPG as an image. It doesn't create a thumbnail. When I use video editing software Kdenlive only .jpg show. But when I double click on a .JPG it does load as an ...
Ron Piggott's user avatar

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