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Questions tagged [image-processing]

Manipulating and processing static images, techniques and software for such task should use this tag.

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Is there a reverse beaver background image for bionic beaver?

This might just be a slight overreaction on my part, but i recently installed ubuntu 18.04 and I need help with the background image. I am using the standard beaver gradient picture which i really ...
1
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0answers
45 views

Unable to detect USB camera

I am trying to use 5 USB cameras on Ubuntu 18.04.1 LTS in python3.6 using opencv3.4.1 through a simple program. I am just using 'cv2.videoCapture()' and then after reading the result use 'cv2.imshow()'...
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1answer
64 views

Can't Open JPG - Error interpreting JPEG image file

I did some sample uploads to OneDrive using graph api. I'm able to upload files (text files) successfully through OkHttp. But, when it comes to images I'm getting this message after opening image ...
0
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1answer
45 views

How can I change camera image details (metadata)? [duplicate]

I want to make my photo editing like a snapshot of my smartphone's camera, but when I check it can't. When I edit it in Photoshop, the image details become Photoshop, so how can I set it so that the ...
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0answers
39 views

Extract text from a PNG image [duplicate]

Does Ubuntu 18.04 have any facilities that allow it to read text from an image? When updating the credentials for one of my VPN suppliers (Vpnbook), I run the following command: curl "https://www....
0
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2answers
157 views

Convert a 1 channel image to a 3 channel image

I have a grayscale image that has only 1 channel. I am using a code that expects all images to have three channels. How can I convert my image to a 3 channel image using some Linux commands? Here is ...
0
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1answer
108 views

Removing the alpha channel from all the jpg images in a folder

How can I remove the alpha channel from jpg images automatically? I am using a deep learning code based on PyTorch that requires 3 channels but my images have 4 channels. I saw this answer but I do ...
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0answers
19 views

How can I reproject an image from cylindrical to rectilinear?

I'm looking for a tool (preferably command-line) which takes an image in cylindrical projection (e.g. a stitched panorama) and a field of view value and outputs the same image reprojected as ...
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0answers
23 views

Software to work with/view QuickTime Player panoramic images format

I use Ubuntu Studio 18.04.1 LTS. I have some panoramic views (mosaic images) made to be seen with QuickTime Player (from Apple), app we can use with WineHQ. I'm talking about .mov files which has a ...
1
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1answer
58 views

How to resize a gif without deforming and remove the blank white region when it's cropped?

The below gif's dimensions are 600*800. Height is 800 pixels, so there's a lot of blank space at the bottom I want to remove. This was saved as old.gif: file old.gif old.gif: GIF image data, ...
1
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1answer
51 views

How can I detect damaged images after they are downloaded and remove them?

I have scraped lots of images that were either jpg, jpeg, or png. However, some of my images do not show in thumbnail view because they are damaged. I have already increased the limit to 100MB for ...
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0answers
44 views

Removing signature image from PDF

I have signed a PDF to send it online (I did with xournal I think). They wanted it per post. I printed it and sent it, they wanted the signature handwritten. I need to remove the signature from the ...
0
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1answer
36 views

Batch low quality compress +1TB of images and videos in multiple folders

I have over 1TB of images and videos spread across multiple folders (personal photos and videos, from the last 15 years) and I wanted to back them up but I don't need them to be stored in high quality....
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0answers
14 views

How to resize images for web with gThumb for Bootstrap Carousel

I'm working on a site that uses the Bootstrap Carousel. I tried using some older images and they weren't wide enough and were being displayed more than once. What is the correct way to resize ...
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0answers
20 views

Batch Image resize 'the file size' not the image dimensions software [duplicate]

I'm looking for a GUI batch resize to optimize pcitures for use on the internet but all the software I have seen are batch resizing the image dimensions, which isn't what I want. I'm all fingers ...
0
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2answers
420 views

Resize multiple images with imagemagick from a folder to other (and keep the name) with a command [duplicate]

Lets say that the images are in the directory /Desktop/projs/proj1/img/ and I want that the output to go to /Desktop/projs/proj1/imgResized/. I tried this command: convert /Desktop/projs/proj1/img/*....
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0answers
21 views

Tool for manually labelling images

I have some blobs on a uniform background. I want a tool such that, when I click on an individual blob, it can detect its boundaries from the background, and paint it white. The blobs have distinct ...
4
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1answer
50 views

How do I change “Image” tab information on a downloaded icon (PNG)?

I downloaded an icon, jester.png from FlatIcon.com. The website states that if you download without a paid membership, you must credit the author, which in this case is Freepik. In fact, here is what ...
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0answers
61 views

Stabilize video only vertically

I took a time lapse series of sunset pictures from a cruise ship, and now I want to make a video of that. Thing is, the ship movement was more noticeable on the final pictures than I expected, so the ...
1
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1answer
72 views

Copy face tags from one set of pictures to the same pictures in higher resolution

I have added face tags to a set of 800 pictures using digikam. I will receive the same set of pictures in higher resolution next week and wanted to know if and how I can copy these face tags from the ...
1
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1answer
35 views

Any command-line tools for converting a series of photos at different angles to a smooth rotating video or 3D viewer?

We have 36 photos of an item take 10 degrees apart, and I was wondering if there are any command-line tools that can take those images and interpolate them into a smooth video or 3D animation. I know ...
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0answers
13 views

Exrtools Invalid display window in image header

I converted a Nikon raw picture to ppm using dcraw; but I can't convert it to exr using ppmtoexr without an error I don't understand. ppmtoexr: _DSC5073.ppm [2868x4310] exroutput: Cannot open image ...
6
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2answers
1k views

How to mirror image files via command line?

What I want to do is very simple. I've a file.png, which I want to mirror, i.e. the result should be a "reflection" of the original image. I know big tools like GIMP and InkScape can do that, but I'm ...
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0answers
28 views

Converted image height and width is not as same as given value

I am trying to compare two images using imagemagic. But the problem i am facing is as my two images width and height are not same, i am first trying to convert one image to a desired value. convert -...
7
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1answer
1k views

Find images in a Linux directory based on their resolution

I would like to scan all images in a directory (recursively within sub-folders), and find those with resolution higher than a specific threshold (e.g. say those with resolutions at least 800x600 or if ...
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2answers
99 views

CR2 Photos compressing from Windows 7 to Ubuntu

Right now I'm going to completely move to Linux. I need to move my photos from a laptop running Windows 7 to a PC running Ubuntu. I tried sending it via Google Drive (single file, ZIP archive, RAR ...
3
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2answers
133 views

For each file in a directory, pass it as an argument to an image viewer [duplicate]

I have a directory with a bunch of .dcm files (they are medical scans) that looks like this: J6071c1.dcm J6071d7.dcm J6071ed.dcm J607203.dcm J607219.dcm J60722f.dcm J6071c2.dcm J6071d8.dcm ...
2
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0answers
125 views

Kamoso webcam takes mirrored/inverted image

Trying to quickly get a picture of a CD cover with my laptop in Kubuntu 18.04, I realize Kamoso is showing and taking not the actual image, but an inverted one, a mirror picture. This odd behavior ...
0
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2answers
3k views

How to install XnViewMP in Ubuntu 18.04

Is there a way to install Image viewer and converter XnViewMP (or Xnview and XnConverter) in Ubuntu 18.04? Other described ways (14.04, 16.04, 16.10) seem not to work for me.
1
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1answer
34 views

how do I prevent imagemagick's convert comand, from scaling an image?

Im trying to make sprite sheets out of animated gifs. The sprites are for my GPS, and each frame needs to be exactly 80x80 pixels. I used this command: convert -resize 80x80 input.gif g.png which ...
3
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3answers
470 views

Saving JPEG from GIMP - JPEG not recognized by other programs

I am using GIMP v.2.8.16 to combine several figures from different file formats into a single JPEG image. I'm able to accomplish this and save as JPEG, and open it on my computer perfectly fine, but ...
0
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1answer
49 views

Old timer attempting to make the big switch [closed]

OS: Mint 18.3 sylvia Kernel: x86_64 Linux 4.14.9 Uptime: 5h 38m Packages: 2392 Shell: bash 4.3.48 Resolution: 1280x1024 DE: XFCE WM: Xfwm4 Theme: Mint-Y-Dark GTK Theme: Mint-Y [GTK2] Icon Theme: Mint-...
1
vote
1answer
487 views

Gimp-level JPEG compression with Imagemagick

I have a batch of images I want to compress. There are hundreds, so I'd like to use CLI tools. The images have the following characteristics. $ identify 100.jpg 100.jpg JPEG 639x426 639x426+0+0 8-...
1
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0answers
626 views

How to reduce the file size of all the photos in a folder [duplicate]

How to reduce the file size of each photo inside the folder. We want to keep the image dimension size of the photos and only reduce its file size.
2
votes
2answers
91 views

find the lowest height and lowest width among all images in a directory

How can I get the lowest height out of all heights and also the lowest width out of all width given I have about 50k images? [jalal@goku images]$ identify -format '%w %h' 72028059_11.jpg 600 431 ...
0
votes
1answer
460 views

Ubuntu 17.10 Gimp 2.8 Can't export image

Installed gimp 2.8 from ubuntu repositories, I open an image, edit it, and try to export it to same format (jpg) to overwrite the existing image and I get this message: JPEG image plug-in could not ...
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3answers
245 views

How to increase contrast of a black and white image?

I receive scanned documents that I need to increase contrast to print. How to do it?
2
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0answers
71 views

Masking a batch of images using Ubuntu [closed]

So I have roughly 400 images of two hands doing gestures. The hands never get connected. I do need to remove the left hand from the image without changing the resolution or size of image and basically ...
1
vote
1answer
827 views

OpenCV imread() problem

I have installed OpenCV lately and I cannot use imread(). This is my code #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <iostream> using ...
1
vote
3answers
1k views

LibreOffice Draw multiple jpg to pdf

How can I use LibreOffice Draw to convert multiple jpg files which were scanned, to a pdf file in a short way. Last time I had to create "New page" then "Insert -> Image" which was a *** for about 50 ...
4
votes
1answer
232 views

Randomly crop pdf files and output image

I have many pdf files in a folder. All I want to do is load a pdf file and generate 100 random crops from it and convert each crop to image of size 256x256. So if I have 100 pdf files, I will have ...
1
vote
1answer
189 views

PNG strip image to animated photo file?

I'm interested in turning an image strip into a high quality GIF or APNG file. The image I particularly want to convert is a gradient image with dimensions 1530x1 made up of raw hexadecimal color ...
0
votes
1answer
468 views

Image processing on opencv c++ tool suggestion

I'm starting Digital Image Processing with opencv and c++. What would be the best application for image processing with opencv c++? Please give me suggestion on that. Research: I do some ...
1
vote
1answer
299 views

What programs support PAM image format?

I am interested to know what programs (particularly image viewers, editors and converters) support the PAM imageformat. So far I've tested 16 viewers (Eye of Gnome (eog), Eye of MATE (eom), Eyesight, ...
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1answer
1k views

pytesseract not working [closed]

Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> from PIL import Image >...
4
votes
1answer
142 views

What is an appropriate infrastructure for Deep Learning? [closed]

I work on Kaggle's Galaxy Zoo competition with Keras/Tensorflow, but the huge amount of data (lot of images) sends my computer to limbo. Mine is a more or less ordinary PC (i5) with a generous 48GB of ...
3
votes
1answer
1k views

Resize images, keep ratio, with size constraints

I have a bunch of images in a folder with different dimensions and ratio. I want to shrink all of them while keeping a minimum height and width, while keeping the same ratio. Something like: convert ...
0
votes
1answer
619 views

fslview not running in Ubuntu16.04

I have installed fsl in Ubuntu 16.04 and when I type fslview I get the following error: /usr/local/fsl/bin/fslview_bin: error while loading shared libraries: libmng.so.1: cannot open shared object ...
4
votes
2answers
980 views

How to create a minimalist cartoon avatar using linux?

Is there any way we can make a minimalistic cartoon avatar of our photo using softwares available for linux. On Windows it can be created using photoshop. But i don't know how to create the same using ...
0
votes
1answer
251 views

Apply exiftran recursivly (rotate all images based on their EXIF info)

I would like to execute exiftran on all .jpg files recursively below the current directory. exiftran -ai * does what I need (apply rotation based on EXIF info) within the current directory, but not ...