Questions tagged [image-processing]

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

Filter by
Sorted by
Tagged with
0 votes
0 answers
14 views

Shotwell, eog, and the Desktop background can't handle some JPGs everybody else can

Take a look at this picture. (In order to reproduce the problem, open this page and click "Download.") It appears OK in the browser. I can open it with GIMP. But if I open the directory ...
user avatar
  • 269
1 vote
0 answers
27 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 ...
user avatar
  • 11
2 votes
1 answer
33 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 ...
user avatar
-1 votes
1 answer
51 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?
user avatar
0 votes
1 answer
59 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 ...
user avatar
3 votes
1 answer
25 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, ...
user avatar
0 votes
0 answers
58 views

Image height and width are inverted in Ubuntu vs Windows

Given this image, I tried to read the image height and width in pixel values, but they are inverted on my Ubuntu PC (Ubuntu 20.04.3 LTS). When I open the image to visualize it, is clear that height &...
user avatar
0 votes
0 answers
9 views

U-net installation query

I am an experimental material engineer and I am quite new to programming. Recently the project I am working on needs image processing and segmentation. After much literature survey, I found U-net ...
user avatar
1 vote
0 answers
45 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 ...
user avatar
2 votes
0 answers
56 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?
user avatar
1 vote
0 answers
75 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 ...
user avatar
2 votes
3 answers
545 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 ...
user avatar
0 votes
0 answers
68 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 ...
user avatar
  • 915
0 votes
0 answers
35 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 ...
user avatar
10 votes
4 answers
1k 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 ...
user avatar
  • 2,250
0 votes
0 answers
243 views

Snagit (32-bit) on Ubuntu

Does anyone has experience installing Snagit on Ubuntu through Wine ? Is it important to go through Wine 32-bit or can I also go through 64-bit ? --- There are different steps to fulfill, such as an ...
user avatar
1 vote
2 answers
545 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-...
user avatar
1 vote
1 answer
615 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 ...
user avatar
  • 25
2 votes
2 answers
2k 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 ....
user avatar
  • 1,029
0 votes
1 answer
182 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 ...
user avatar
  • 3
2 votes
0 answers
156 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?
user avatar
  • 3,631
1 vote
1 answer
321 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 ...
user avatar
  • 15
0 votes
0 answers
230 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
1 vote
2 answers
252 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.
user avatar
  • 767
0 votes
2 answers
934 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 ...
user avatar
  • 417
4 votes
3 answers
656 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, ...
user avatar
1 vote
2 answers
4k 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?
user avatar
  • 60.8k
1 vote
1 answer
456 views

how to convert 1280x720 jpg files to 640x240 ppm files using ImageMagick convert command?

I'm kind of in a hurry so I ask it here (I'll read the documentation later). I have image files (width 1280, height 720, colored, jpg) and I want to first reduce the files to half both vertically and ...
user avatar
  • 1,237
1 vote
1 answer
774 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.
user avatar
0 votes
1 answer
54 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 ...
user avatar
0 votes
0 answers
14 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 ...
user avatar
2 votes
1 answer
527 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'...
user avatar
  • 183
1 vote
1 answer
262 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 ...
user avatar
  • 2,588
0 votes
0 answers
262 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 ...
user avatar
0 votes
1 answer
261 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 ...
user avatar
2 votes
1 answer
117 views

How to check if an image has 2 bytes per pixel and how to convert it to an image with 1 byte per pixel?

I have thermal images from FLIR camera that has 2 bytes per pixel. I am not sure how I could check in Ubuntu if these images have 2 bytes per pixel or not. Also, how can I convert a 2 byte per pixel ...
user avatar
  • 3,631
0 votes
2 answers
277 views

How can automatically print a page bigger than an A4 on multiple A4 pages?

I have an image bigger than A4 (210x297 mm), let's say 400x400 mm. Is there a way to automaically print it on multiple pages keeping the original size, so that I can just put them side by side to get ...
user avatar
  • 1,046
0 votes
1 answer
76 views

image version broken ubuntu 18.04LTS

I reinstall Ubuntu 18.04LTS and I have 2 image version: 5.3.0.28 generic (original installation) and 5.3.0.59 Uupdate version). This last version do not work. How can eliminate that version from boot ...
user avatar
0 votes
3 answers
96 views

Good program to cut out image regions manually

I have to process several hundred images manually. The work consists of cutting out square regions from the pictures. I want to save these regions. When saving, there should not be any loss of quality....
user avatar
  • 119
2 votes
1 answer
4k views

How to batch / multi process cropping images in the terminal?

I tried to crop several images of the same size, but when I crop 5 images and the process is complete, only 4 images are cropped, 1 image is not cropped, if I crop 1 image an error will appear... I'm ...
user avatar
0 votes
1 answer
44 views

Is there a solution for scanning several photos in one go and save them in several files?

I use xsane for scanning. Is there any solution for putting several photographs on the scanner and they are split up automatically into several files after the scan? Or loading the resulting file ...
user avatar
0 votes
0 answers
201 views

How to speed up my new 'supposedly' high powered computer

Does anyone have some tips for ways I can optimize/improve the speed of my computer? Just bought a new one, intended for neuroimaging analysis, and i installed ubuntu. I know there's some features of ...
user avatar
  • 75
0 votes
1 answer
56 views

Any script that can automatically crop really large image by checkered?

I have a really large map image (11010*17518 pixels) and I want to print it in average size pieces. Is there any automatic script that can crop a image by checkered (e.g. into 4*4 and get 16 smaller ...
user avatar
2 votes
1 answer
1k views

How to change image PPI in batch mode?

Is it possible to change an image resolution expressed in pixels per inch (PPI) in batch mode, using command line? My images resolution is currently below 100 PPI. I would like to enhance it to ...
user avatar
1 vote
0 answers
111 views

Error occurred when I used tensor flow lite custom model

I faced an issue while running an object detection program using tensor flow lite costum model.I am attaching the error code bellow. classes = interpreter.get_tensor(output_details[1]['index'])[0] # ...
user avatar
  • 11
2 votes
2 answers
229 views

Software to seamlessly edit multiple images

Format of my mom's old PC is overdue, W7 is slow and choppy and I'd love to show her how fast her laptop can be with a lightweight Ubuntu distro. But my mom is really used to Microsoft Office Picture ...
user avatar
  • 21
12 votes
2 answers
8k views

How to convert graphical images to ASCII art?

I want a custom image in my terminal made of characters, is there a program I can use? Specifically, the gear within my school's robotics logo.
user avatar
5 votes
1 answer
1k views

Convert images into PDF without ImageMagick hacks

Since ImageMagick's PDF abilities are broken ("not authorized" error) for some time with no solution in sight, what are the alternatives for converting images into PDF format right now? I'm not ...
user avatar
  • 152
1 vote
0 answers
36 views

Put signature onto pdf file [duplicate]

I have two files: A pdf file and a png file with my signature. Now I want to put the png image file onto the pdf on a particular place. Which GUI tool could help me here?
user avatar
  • 2,352
2 votes
1 answer
1k views

Join images with padding and alignment

I have two images of different height which I want to join horizontally (i.e. side-by-side). I want the images to be bottom-aligned as well as to be separated by a 25 pixel wide white area. With ...
user avatar
  • 549

1
2 3 4 5
8