🌅 Image filtering §

= applying a filter $H$ to an image $f$: $H(f(x,y))=r(x,y)$

⚙️ System Theory §

• filter: system
• image: signal -> convolution can also be performed

Types §

Linear filters §

• 🏙️ Image derivative: Derivative filters
  • e.g. ${\delta }_x\to$[-1, 0, 1]
• gaussian filter
  • -> smoothing

Non-linear filter §

• 🎯 Median filter
• 🔪 Segmentation filters (image filtering)