Questions tagged [image-processing]

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

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24 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 ...
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0answers
119 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 ...
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gThumb: how to preserve image ratio?

After opening an image, if I go to tools+resize, there's a dropdown for "preserve ratio". If I use the resize button in the panel, there's no option to "preserve". Why? Is there some way to get that ...
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1answer
40 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 ...
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1answer
65 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 ...
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40 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] # ...
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1answer
28 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 ...
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1answer
1k 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.
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0answers
131 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 ...
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0answers
30 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?
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1answer
90 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 ...
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2answers
100 views

How do I just get the image, and get rid of the black columns on right and left in Shotwell?

Is there a way of cropping the image in the center and getting rid of the black columns that shotwell shows on the screen?
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10answers
1k views

Alternative to IrfanView

On Windows, I've been using IrfanView as my image viewer of choice for about 15 years. I use it for things like resizing, cropping, flipping and rotating images; converting between different formats; ...
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0answers
129 views

GIF maker for 18.04 without losing quality

I am looking for a GUI tool like GIMP to create animated GIFs from PNGs. I tried GIMP 2.10. The quality of GIF is low in it. Perhaps to reduce the size of GIF, but there are burrs on the side of the ...
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29 views

Looking for a way to automatically resize and skew (perspective) images

Today I'm tasked with doing a piece alignment system for a customer. He needs to align cut pieces (roughly about 50 cm) in a table, so they're processed (table moves after the operator has aligned ...
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1answer
80 views

How do I dewarp fisheye (Samsung Gear 360) photos?

Samsung Gear 360 is a dual-spherical 180+180 fishey lens setup for full vertical+horizontal 360* panarama or virtual reality photography. On windows, one can use Cyberlink power director to import &...
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1answer
180 views

How to print multiple copies of an image on a single page - gui

I am looking for a GUI way to select one image file and print it multiple times on a single sheet of paper. This is basic functionality in other OS's, but my best shot for doing this in Ubuntu so far ...
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0answers
103 views

How do I change the text color in Pinta?

I'm using Pinta in Ubuntu and have added a text box to my image. I then added text, which doesn't show because, I assume, it's white colored. I can highlight the text and see the length is correct, ...
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0answers
30 views

Ubuntu server input speed decreases when another program is running

Network camera is sending jpeg images to a remote Ubuntu 18.04 every second. When I run a Python program on the same directory which traverses the list of images and processes an image then either ...
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1answer
92 views

Command to convert many images to one square image (not becoming a column or a row)

Is this really duplicate? I have not yet found it anywhere. For example: I have 4 PNG images: image1.png, image2.png, image3.png, image4.png. Every one of them is 200x200 pixels. I want to convert ...
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1answer
315 views

How do I cut out an object with Inkscape?

How do I cut out a object with Inkscape? I have a photo of flip flops but I need to only have the flip flops cut out.
4
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1answer
295 views

CSV table creation from image

What are the Ubuntu options to create CSV tables from an image: Ideally, options would be simple and quick. Image is from Yield Curve article
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0answers
159 views

How to fix undefined reference to TIFFOpen-TIFFClose-TIFFGetFiled on Ubuntu-19.04

I have recently installed Ubuntu-19.04. I saved the the most important data from Ubuntu-18.04 as an enormous .tar file as I had some broken files on my 18.04 and transferred everything to the new 19....
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1answer
57 views

How can I rename image file based on colors in the image?

For example: If I have a 2x2-pixel image. In the image: 3 pixels are red. 1 pixel is green. 0 pixels are blue. I want to rename the image to 3_1_0.
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1answer
991 views

How can I overlay an image (a transparent PNG file) over all the “background” images in a directory using command line?

I have a transparent PNG file (a picture of a cow) I have a folder that contains images of grass, mountains, rivers and so on. I want to overlay the cow image onto those background images only by ...
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1answer
581 views

How to recursively and automatically convert all TIFs to an aggregated PDF per directory?

I'm attempting to use GraphicsMagick in Ubuntu to convert hundreds of directories that contain multiple TIF files into one multi-page PDF file per directory. The folder depth is consistent with this ...
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0answers
13 views

How can I capture an image displayed on an external monitor and create an mp4 file?

I would like to find a configurable software solution that can simultaneously, Manage the input from 6 IP cameras, Format and display 6 image-segments on a external monitor (flat screen) and, ...
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0answers
63 views

Which image viewer from Ubuntu repositories supports image auto rotate based on EXIF?

I have used Fastone Image Viewer on MS Windows for long time. One of its great features was image auto-rotation based on EXIF attributes. So viewer rotates image to show it in correct orientation. ...
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1answer
32 views

Resize image from command line to 1024x576

I need to convert images down to 1024x576 using the command line. I have Gimp, VLC, and Inkscape, on Ubuntu MATE 18.04. Thanks.
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2answers
79 views

How to compress 3000 images in batches of 50

I have a folder with over 3000 images, I want to compress 50 of them individually and store them in tar files. The images are not serially named. How to use write a bash script which does this job?
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1answer
79 views

Installing Non-Repository Program in Windows Subsystem for Linux

I'd like to install the image editing CLI program NConvert to WSL, but I'm not sure if this is possible, since NConvert isn't in any repository. There is a procedure I could implement to attempt an ...
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0answers
66 views

Crop image by horizontal lines, but they are not always straight, using command line

I have a lot of images looking like this Is there a way to follow the horizontal lines and make a new image from to top of the line to the bottom of the horizontal line and between the end of the ...
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0answers
283 views

Is there a simple image processor that can reduce image color depth (convert 24-bit RGB to 2, 4 or 8-bit indexed color)?

I have a need for a quick/easy image processing application under Ubuntu 18.04 that will allow me to view, crop, scale down and reduce color depth/color mode (number of color bits per pixel) - with ...
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2answers
213 views

Is it possible to get the location of a specific color in an image using bash?

I have an image that is mostly white but has a red rectangle in it. Is there a way to find the coordinates of that red rectangle using bash?
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0answers
378 views

Convert image to black/white contours

Is there any tool to convert a colour picture to a black and white picture with just contours?
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3answers
4k views

Simple image editor tool to draw a simple box/rectangle in an existing image [duplicate]

I need a simple image editor tool to draw a simple box/rectangle in an existing image, and probably write a simple text in it. A similar but not the same question has been asked here before: Simple ...
2
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1answer
166 views

What software can I used to open SGI images?

I have an image file which is in sgi format. $ file image.sgi image.sgi: SGI image data, RLE, 3-D, 280 x 200, 4 channels How can I open it?. Tried using eog but it doesn't ...
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1answer
260 views

What program can I use to convert RAW images from my Sony camera to jpeg?

I have a Sony camera and need to know what app to use to convert my RAW images into jpegss. My camera is a Cybershot RX100 and my version of Ubuntu is 18.04.2 LTS.
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2answers
518 views

How can I select a region in an image file, and hide the region?

How can I select a region in an image file, and hide or blur the region (e.g. barcode, or personal information) in any way that you think is reasonable? I have tried pinta. I first select a rectangle ...
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3answers
2k views

How can I highlight parts in a screenshot

High-level use case: Highlight parts in a screenshot I don't care if gimp or another tool gets used to solve this. Up to now, I do it like this: Super-key "screen..." choose application "Screenshot"...
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1answer
274 views

PDFTOPPM -scale-to option

I'm using pdftoppm to convert PDFs to PNGs. I have played with the DPI options (-r, -rx, -ry) and increased the quality of the resultant images by increasing the DPI. I see that there is also a -scale-...
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1answer
53 views

tool to crop and save

I need a tool that helps me to crop and save cropped image easily. I am working on a project that extracts special characters from documents and I need crop character by character and save it with its ...
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1answer
3k views

Why won't scikit-image work for Python3?

So I'm trying to use scikit-image for several functions on images. One such function is converting an image from rgb to hsv where I took my image (img) and said from skimage.color import rgb2hsv ...
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0answers
549 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
768 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 ...
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1answer
359 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
272 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....
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2answers
9k 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 ...
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1answer
965 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
71 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 ...

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