Convolution

Convolution (Image Filter Kernel Operation)

Convolution is the fundamental operation behind image filters like blur, sharpen, and edge detection. A small matrix (kernel) slides across the image, computing weighted sums of neighboring pixels to produce the output.

기술 세부사항

A 3x3 convolution kernel processes each pixel by multiplying its 9 neighbors by kernel weights and summing the results. Gaussian blur uses a bell-curve-weighted kernel, while Laplacian edge detection uses a center-weighted negative kernel.

예시

```javascript
// Convolution: processing with Canvas API
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
ctx.drawImage(sourceImage, 0, 0);
const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
// Process pixels in imageData.data (RGBA array)
```

Categories

Convolution

기술 세부사항

예시

관련 도구

관련 용어