extractstamp

Extract stamps from images using OpenCV.js.

Preview Site: https://xxss0903.github.io/extractstamp/index.html

Features

• Extract red stamps from images
• Support for circular stamp detection and extraction
• Ability to set the color of the extracted stamp

Usage Instructions

1. Clone or download this repository to your local machine.

2. Ensure your project includes the following files:

   • extractStamp.js
   • opencv.js (can be included via CDN, e.g., https://docs.opencv.org/4.x/opencv.js)

3. Click the "Choose File" button to select an image file containing a stamp.

4. The system will automatically process the image, extract the red stamp, and display the results.

Main Function Description

• initOpenCV(callback): Initialize OpenCV.js
• extractStampWithFile(file, setColor, isCircle): Extract stamp from a file
  • file: Image file
  • setColor: Set the color of the extracted stamp (default is red "#ff0000")
  • isCircle: Whether to extract only circular stamps (default is true)

Example

extractStampWithFile(file, '#ff0000', true).then(dstImgList => {
    console.log('Red stamp extraction successful', dstImgList);
}).catch(error => {
    console.error('Error processing image:', error);
});