Questions tagged [image-processing]

The tag has no usage guidance.

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

Avif images: what are qmin and qmax settings?

avif image quality is supposedly modified by 2 setting, qmin and qmax, see https://github.com/link-u/cavif: --qmin Minimum (Best Quality) Quantizer --qmax Maximum (Worst Quality) Quantizer ...
user avatar
0 votes
0 answers
16 views

FFMPEG compress a I-frames into a P-frame, given a I-frame before

I have two consecutive I-frames (uncompressed jpg or numpy image) and i want to compress the second one into a P-frame and than later do the reverse. Is this possible with FFMPEG?
user avatar
1 vote
2 answers
38 views

How to bulk replace images with placeholders of same dimensions, with a unique visual identifier?

Context I have a few private GitHub repositories of games I have made. I want to open source the codebases, but many of the images used are licensed so cannot be shared freely. Since the image ...
user avatar
  • 121
0 votes
0 answers
8 views

How to contain image size depending on landscape or portrait using imagemagick?

I want to mogrify image so that the maximum size it can have is 2048x1024 in landscape and 1024x2048 in portrait. Is this possible with imagemagick? It will process a folder full of images with ...
user avatar
0 votes
1 answer
50 views

Overlay GIF on MP4 at certain time interval (while maintaining GIF transparency) [FFMPEG]

I'm looking for a way to implement a gif overlay on top of an mp4, having the following characteristics: Maintaining GIF transparency on video Having the GIF only showing up for a certain time ...
user avatar
1 vote
1 answer
41 views

Drawing text on a gif while preserving transparency [FFMPEG]

Using the regular method, input > drawtext seems to remove transparency for GIFs and messes with the coloring ffmpeg -i test.gif drawtext=text='Test':fontcolor=red:fontsize=24 output.gif I've ...
user avatar
0 votes
0 answers
31 views

SOLVED | Images are rendering broken [duplicate]

I got a new computer for Christmas. I love it! But then I went on scratch and saw that the blocks were rendering broken. Later I wanted to log in to WhatsApp web and the QR code was broken. It's ...
user avatar
  • 1
0 votes
1 answer
60 views

How does one embed license (or other) information into a PNG file?

I want to preface this by saying no, I don't mean steganography. What I'm looking for isn't simply putting text etc. into an image file through things like Outguess or OpenStego. A software company ...
user avatar
0 votes
1 answer
257 views

How to know details of an HEIC file?

An HEIC file was sent to me via email. Is it possible to know when that particular HEIC file is created by the original user?
user avatar
  • 101
0 votes
0 answers
23 views

Why when encoding AVIF images with avifenc on slowest speed file size get bigger?

My source file is lossless PNG, 576x767, file size 1.26 mb. I experiment with encoding AVIF format and read, that higher encoding speed setting will run faster, but produce worse compression ...
user avatar
  • 101
0 votes
0 answers
26 views

Working on a single in channel in GIMP

I'm using GIMP 2.10.22. I have an RGB color image, and I want to do work on one of the channels, without affecting the others. How can I copy the channel into a new image, work on it there, then copy ...
user avatar
  • 7,312
0 votes
1 answer
34 views

Can you identify this image type?

I have a MS SQL Server table with images stored in a large object. I know the BLOB contains image data, but I don't know what type all the images are. There are two different types identified by a ...
user avatar
0 votes
0 answers
32 views

How to merge many photos automatically?

How to merge many photos automatically? I have 2 folders of photos, 200 photos each. I need to merge (side by side) the 1st photo from the 1st folder with the 1st photo from the 2nd folder.
user avatar
0 votes
1 answer
42 views

Export multiple non-adjacent tiles with GIMP or ImageMagik or other tools

Tl;dr: looking for a tool or script that can export disjoint cookie-cutter squares from a larger image. Imagine that you want a set of tiles on your kitchen wall that make up a larger image. To be ...
user avatar
  • 101
0 votes
0 answers
97 views

Cropping SVG images on the Command Line

Is it possible to crop an svg on the command line and re-save the file? I've looked into rsvg-convert and thought a combination of the options (specifically zoom, width and height) could achieve the ...
user avatar
  • 1
1 vote
1 answer
211 views

How to batch convert PNGs to JPEGs and preserve timestamps in filesystem & EXIF header?

I sometimes take screenshots on my Mac during video-calls with friends/family (with their consent of course!) and would like to add those images of a photographic nature to my Apple Photos Library. I ...
user avatar
  • 301
0 votes
0 answers
17 views

Overlay image on FFMPEG running on and on

I wanted to overlay images on my video but no impact to any audio. My video is of length 01:32:34 and my below script continue running from 3 hrs and then I closed it. Looks some issue. Please can you ...
user avatar
  • 61
1 vote
1 answer
112 views

Convert table image to Excel, using Excel

I have the table below in the image png file format. Would it be possible to convert this to an Excel table using Excel?
user avatar
  • 301
0 votes
1 answer
70 views

Need help processing opened images in ImageJ

I've created a macro (based on different ones I've seen) that analyses particles areas in my picture, automatically copies the Area column in the results window to my clipboard and displays a window ...
user avatar
  • 1
0 votes
0 answers
20 views

How to pre-process the background of this image in order to OCR the table properly?

I have to OCR the book of tables consisting of 500+ pages but the maker stamped every page. Can anybody help me on how should I process it in order to be able to recognize it let's say in FineReader? ...
user avatar
0 votes
1 answer
32 views

Cropping sections of an image and composing it into one image

Suppose I have the following image with three equally-sized rectangles, but different letters And I would like to combine them so that there is only one rectangle with all three rectangles layered on ...
user avatar
  • 1,139
1 vote
1 answer
87 views

What causes these patchwork lines in the resulting image from my scanner?

I'm trying to scan some old trading cards (AD&D Trading Cards from 1991) and I'm having trouble getting a good scan result on a flat bed scanner. The issue I'm having is the resulting image ...
user avatar
  • 756
1 vote
1 answer
96 views

How do I edit this texconv "IMGtoBC3.bat" file so it "READS FROM & PRESERVES the directory structure when writing the "resulting" dds files

How do I edit this texconv "IMGtoBC3.bat" file so it "READS FROM & PRESERVES the directory structure when writing the "resulting" dds files? Personally, I have a large ...
user avatar
1 vote
0 answers
37 views

How to measure length (in pixels) between multiple points on an image [closed]

I have a fairly high resolution map, with a known scale. How to measure the length in pixels between multiple points on an image? Straight line is simple, but how to do it when there are multiple ...
user avatar
  • 111
0 votes
1 answer
21 views

Dual monitor wallpaper issue

I have two identical Samsung monitors with resolutions set to 1920x1080. I am attempting to use a PC of 3840x1080 and span across the two. Unfortunately, regardless of the image I use I get the shear ...
user avatar
  • 3
1 vote
1 answer
643 views

Gimp: opening clipboard as new image, with correct pixel size / dimensions?

I often find myself having a picture in my clipboard, and then I want to quickly edit that in Gimp. So I ⌘+Tab to Gimp (using the latest Gimp on macOS Catalina) and do ⌘+N for New Image. Problem: it ...
user avatar
1 vote
1 answer
260 views

Can I add Png Image as an option to Create New Object Type in Excel 365?

I want to insert several pictures as Objects in Excel 365. These pictures are scans of construction plans that serve as references to some calculations in the file. File readers need to be able to ...
user avatar
  • 23
0 votes
0 answers
29 views

Given a printing of a monochrome bitmap image, how can I recover the bitmap?

I have a printout (scan, really) of what was originally a monochrome bitmap image. The pixels are clear enough that I can manually doodle in a reproduction of it in Paint or Gimp or some other image ...
user avatar
  • 705
2 votes
0 answers
475 views

Feather edge of image in with ImageMagick in 1 step (existing solution in 3 steps)

I am trying to add a feathered edge to a JPG such that it fades to black at the edge of the image. I was able to achieve this in three steps, but have been struggling to combine it into one step. ...
user avatar
0 votes
1 answer
31 views

Why are screen recordings on MacOS unable to be played once copy/pasted to a usb drive?

If I take a screen recording in MacOS, (seemingly regardless of file size) and copy/paste it into a usb drive, then try to play the .mov file from the usb (on a Mac)I get the error: The document <...
user avatar
0 votes
2 answers
296 views

Vector image - convert JPG to EPS or build EPS from scratch

My friend sent a .jpg logo to some company and they responded that they do not accept that format and they needed it to be vector version and can't use .jpg. I wonder if converting .jpg to .eps would ...
user avatar
  • 184
0 votes
1 answer
969 views

Change letters from black to white on image

I have an image of a logo (format *.jpg but can use others if necessary), which has black letters on a white background, like this: I would like to change the letters from back to white, while still ...
user avatar
  • 185
0 votes
1 answer
215 views

Bulk convert image-data URIs to images

I have a text file of 391 image-data URIs, one on each line. I need to batch-convert them all to images, named according to their sequence (i.e. image001.png, image002.png or similar). What do people ...
user avatar
  • 385
0 votes
1 answer
148 views

How to save image file, using "xfce4-screenshooter -r -c" command?

I using xfce4-screenshooter -r -c command for make a screenshot. xfce4-screenshooter --help says: -c, --clipboard Copy the screenshot to the clipboard -r, --region Select a region to be captured by ...
user avatar
1 vote
0 answers
40 views

GIMP/Imagemagick: Breaking single images into multiple images

I have pulled the image files from this Gregg Shorthand resource site with the intent of using the shorthand figures in Anki flashcards to complement my study of the system. You will note that the ...
user avatar
0 votes
2 answers
1k views

Convert PowerPoint Slides into Single Infographics

Infographics are graphic visual representations of information, data, or knowledge intended to present information quickly and clearly. I have PowerPoint presentation with about 8-10 slides, this ...
user avatar
0 votes
1 answer
282 views

Use find to delete all images under given dimensions

I just used Recuva and Photorec to recover some data off an accidentally-formatted drive. Naturally, the result is every intact file that ever existed on the drive during its lifetime. This means tens ...
user avatar
  • 10.3k
0 votes
1 answer
98 views

How to stitch 3 JPEG files horizontally to generate a big image that represent a 2 pages big crossed words? [closed]

I have scanned a big crossed words (2 pages in a tv magazine) using my personal scanner. I have now 3 PNG files that I want to combine to generate the original crossed words. After having scanning ...
user avatar
  • 223
0 votes
0 answers
41 views

"Canonicalize" PNG files

I am looking for a way to process a set of PNG files in such a way that if they contain the same image data, the files will be byte-by-byte identical too. Is there a quick and easy, automatable way ...
user avatar
  • 2,727
5 votes
2 answers
4k views

How to convert DICOM images to PNG?

I have some DICOM medical imaging files downloaded from Cancer Imaging Archive. I can convert them from DICOM to several other formats, but as you'll see the conversion isn't working as expected in ...
user avatar
  • 291
1 vote
1 answer
2k views

How to use dcmcjpeg to convert DICOM to JPEG?

The dcmcjpeg tool from the dcmtk package (sudo apt-get install dcmtk) is supposed to convert DICOM image files to JPEG. But I suspect it still wraps the image in a DICOM container, because when I try,...
user avatar
  • 291
2 votes
1 answer
315 views

How can I use ImageMagick to batch resize and use -extent with transparency?

Version: ImageMagick 7.0.8-68 Q16 x64 2019-10-05 Windows 10: 1903 I have hundreds of logos that I need to resize to a standard and then use -extent to pad back out. magick 608000000000051.png -...
user avatar
0 votes
0 answers
104 views

Desktop Background Scaling and RAM usage

I've been setting my wallpaper on all my computers to just a single pixel image, in order to conserve RAM for more important uses. But I wonder if, in the process of the OS scaling the image to screen ...
user avatar
0 votes
0 answers
89 views

Command or program to get width, height + XMP tags?

I have a problem while working in Windows command line whereby I am trying to get width, height and XMP tags (where applicable) from a large number of image files in a variety of formats (JPEG, PNG, ...
user avatar
0 votes
1 answer
48 views

Image size reduction from comision art after saving with paint

I comission some art, and have a problem with an artist: He sends me a finished digital picture with normal size. For example, 5 mb for 4k x 5k resolution. But once I go to the program "paint" and ...
user avatar
0 votes
0 answers
802 views

FFmpeg image slideshow (multiple images) with infinite loop till audio file ends

I want to make an image slideshow (multiple images) with an infinite loop until the audio file ends, and with a full duration audio file. Is there anybody who can help me out.... Earlier I was doing ...
user avatar
3 votes
1 answer
3k views

ffmpeg cropping: 'Invalid too big or non positive size for width'

I'm trying to generate images thumbnails using ffmpeg. The folder contains various jpeg files with different resolutions. ffmpeg -y -i input1.jpg -filter_complex "scale=(iw*sar)*max(238/(iw*sar)\,358/...
user avatar
  • 478
0 votes
1 answer
64 views

How to merge a png on top of a jpg using the command line?

Ubuntu 16.04 Bash 4.4.0 I have a ton of vehicle images to create on a daily basis. My routine is simple but if I can automate this in a bash script, that would be super awesome. I connect to an ...
user avatar
1 vote
1 answer
208 views

ffmpeg png to gif losing first half of frame list with fifo filter

Can anybody suggest a solution to (or at least a cause for) the following snag I'm experiencing in Windows 10, please? While I originally thought this was, maybe, a problem with the source images, I'm ...
user avatar
4 votes
2 answers
1k views

Add 'Save as webp' To windows 10, Right Click Context Menu

I would like to know if there is a way to add 'Save As WebP' image file format to windows 10 right click context menu. Through the registry. WebP images are a new file format that is designed ...
user avatar