Questions tagged [image-processing]

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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 ...
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13 views

ImageJ: Export image to PDF and export overlay as layer in the PDF

I'm trying to use ImageJ to annotate an image file, and, for reasons, the image file needs to eventually be converted to PDF. I've been using the Measure/Overlay option for the annotations, but I'm ...
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39 views

Recovering corrupted image data from single files

Most questions and information about corrupted files have to do with recovering files from a corrupted partition, where the file data is assumed to be present on the disk and it's just a matter of ...
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13 views

Put number of each point in a contour image

I calculated the number of red circle in the image. I need to put number in each circle of my image. Attached here my output image. Your assistance would be appreciated. My code is- if count2: ...
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16 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? ...
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1answer
24 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 ...
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12 views

How to get perfect lines using opencv of defined width (in pixels)

I am struggling hard for this please somebody help me out... I am reading a maze using opencv as shown. img=cv2.imread('Maaaze.jpg') gimg= cv2.cvtColor(img , cv2.COLOR_BGR2GRAY) _ , timg = cv2....
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1answer
62 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 ...
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1answer
47 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 ...
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26 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 ...
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8 views

How to combine several WEBP, JPEG and TIFF images into one container without recoding?

PDF is a good candidate to achieve the goal, but I couldn't find any prove (specification) that PDF allows WEBP images to reside inside PDF. Hence there is a question concerning how to combine several ...
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1answer
17 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 ...
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92 views

Ghostscript: don't downsample images in PDF

I'm using Ghostscript to convert my PDF (created in LuaLaTeX) from RGB to CMYK. The PDF has graphics - the vector ones are fine but the raster ones get downsampled (I guess to the default 72 DPI). I'...
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1answer
157 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 ...
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1answer
136 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 ...
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23 views

How to decrease pages resolution in a pdf scan

I have a book in pdf format with scanned pages of size 52 MB - 263 pages. Another book of 354 scanned pages has the size of 19,6 MB. The first book loads very slowly. Is it possible to learn the ...
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23 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 ...
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306 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. ...
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1answer
26 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 <...
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2answers
245 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 ...
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1answer
433 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 ...
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1answer
128 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 ...
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1answer
82 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 ...
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37 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 ...
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2answers
592 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 ...
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1answer
180 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 ...
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1answer
57 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 ...
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37 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 ...
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2answers
3k 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 ...
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1answer
1k 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,...
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1answer
145 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 -...
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75 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 ...
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79 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, ...
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1answer
44 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 ...
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621 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 ...
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1answer
2k 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/...
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1answer
46 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 ...
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1answer
150 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 ...
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2answers
581 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 ...
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0answers
285 views

Tesseract: OCR hex and binary strings from old documents

I have some questions about Tesseract Context I am currently working on an old cryptographic algorithm from East Germany (GDR) which was developed in the 80s. I implemented the algorithm in C#. Now ...
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48 views

Way to record the last n minute from webcam

I try to use or create a software to record the last n minutes from a webcam. I use opencv to grab images from my webcam but I don't know if it is the best way to create a in real time a video. I ...
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1answer
93 views

How could I resize this image without misplacing pixels?

I wanna resize an upscaled 1366x768 image down to its native 480x270 again. Every time I do it, lines of pixels are misplaced. Example with highlighted areas. The image on the right is slightly out ...
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1answer
196 views

How to pad images with imagemagick?

I need to process a set of identically formatted images to get them to conform with my client's website format. I wanted to use ImageMagick's convert or mogrify instead of ffmpeg but I just cant make ...
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1answer
316 views

How to turn off the anti-distortion in Hugin (panoramic image software)?

The software uses various cartographic mapping thingies to account for the distortion in photographic images. However, I'd like to stitch together several images that don't have this problem (...
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195 views

Intel RealSense Camera R200 video feed is all green

I am trying to get an Intel Realsense R200 camera working on a Windows 10 machine using Python 3.7.3 and OpenCV 4.1.0. The problem is that when I open the application the video feed is all green ...
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2answers
372 views

Copying unknown tags with ExifTool

I have some images which I edited in GIMP, which lost some EXIF metadata in the process (and some EXIF tags added, too), so when I'm done I copy all the metadata from the original image into the ...
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1answer
6k views

How to calculate the size of an image?

How many images of size 800×600 with 8-bit gray level can be stored in 512 MB of storage?
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1answer
91 views

How can I overlay 2 binary images to save the white color on Ubuntu?

Imagine there're two the same binary images (all pixels are black). And then you take the 1st image and make some of the pixels white (e.g., points (10,10) and (11, 11)) and do the same operation for ...
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490 views

Is it possible to optimise and resize an image with mozjpeg?

I want to be able to compress and resize and image with mozjpeg's cjpeg command However according to the usage file it does not seem like cjpeg can do both in one single command. Is it right? If ...
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2answers
833 views

How can I enhance the gray text on scanned crumpled receipts?

Consider the following snippet of a receipt I've scanned: usually when I scan receipts I manage to separate the text and the background using something like a color-range selection tool, selection ...