opencv_js_sample

Contents

All the follow projects used vite, so please install with npm if you would like to download and use these projects.

versions

• Node.js: 20.12.2
• npm: 10.8.2
• vite: 5.3.4

Import and build

• Build infomation of opencv.js - 0101buildinfo/
  (note) no check npm run build only npm run dev.
• The list of functions in opencv.js - 0102functions/
  (note) no check npm run build only npm run dev.
• The list of consts of opencv.js - 0103consts/
  (note) no check npm run build only npm run dev.

Image

• Examing the structure of an image - 0201metadata/
  (note) no check npm run build only npm run dev.
• Copy canvas - 0202copycanvas/
  (note) no check npm run build only npm run dev.
• Pick pixel color - 0203pickpixelcolor/
  (note) no check npm run build only npm run dev.
• Draw a circle in monochrome - 0204drawcircle/
  (note) no check npm run build only npm run dev.
• Draw a circle with floating point numbers - 0205drawcircle32/
  (note) no check npm run build only npm run dev.
• Draw Tool - 0206drawtool/
  
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  • Try on is here (note)PC only
• Region of Interest - 0207roi/
  
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Video processing

• Composite video frames and images - 0301addimage/
  
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• Camera Flip - 0302cameraflip/
  
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• Video Miniture - 0303miniture/
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• Video Transitions - 0304transition/
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• Video Mog2 - 0305mog2/
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• Video Opticalflow - 0306opticalflow/
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Image processing

• Image Resize / Mosaic / All - 0401imageresize/
  
  • (note) no check npm run build only npm run dev.
• Image Resize / Mosaic / A part - 0402imageresize2/
  
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• Image Blur - 0403imageblur/
  
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• Image Resize / Mosaic / A part - 0404imageedge/
  
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• Image Resize / Mosaic / A part - 0405imageedgeanime/
  
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• Detect QR Code - 0406qr/
  
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• Erase Powerlines - 0407morph/
  
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• Tilt correct - 0408hough/
  
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• Detect Faces - 0409face/
  
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• Compose Images - 0410compose/
  
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Color

• Monochrome color - 0501grayscale/
  
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• Color Invert - 0502invert/
  
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• Sepia Color - 0503sepia/
  
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• Analyze RGB color - 0504rgb/
  
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• Change Background - 0505background/
  
  • (note) no check npm run build only npm run dev.
• White and Black - 0506binary/
  
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• Color Hue - 0507hue/
  
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  • Try on is here
• Color Posterize - 0508poster/
  
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  • Try on is here

Download and Install

• OpenCV.js Library download
  • move to the link.
  • download latest version in the page.
  • Extract the zip file you downloaded.
  • Copy opencv.js file in the folder you extract and paste to your work directory.
  • {note} The opencv.js file is not ES Module compatible. You need to customize it a bit to make it ES Module compatible. opencv.js file in this repository is already ES Module compatible.

Build

• develop / localserver

npm run dev

• production build

npm run build

After build, upload all files in the dist directory to your host server with FTP and so on.

Functions

Reference page

Reference