GTÜElectronics Notes

Image Processing · Digital lecture note

Lecture 8 – Image thresholding

Görüntü İşleme – Görüntü eşikleme (thresholding)

Course
Image Processing (ELM463)
Semester
Semester 7 · Fall 2024–25
Format
PDF · 7 pages · 0.2 MB · handwriting-style LaTeX
Language
Turkish
Original note
Ders8.pdf

Open the PDF (0.2 MB)LaTeX source (.tex)Original handwritten note

Lecture 8 – Image thresholding – first page of the digital lecture note
Notice: The digital notes were created from the handwritten notes with the help of Claude (Anthropic); they are meant as a supplementary resource and may contain errors. Always rely on the original notes and the official course materials.

What is in this note?

Section headings of the note (in Turkish):

Text of the note

Show as plain text (Turkish; formulas and drawings are not included)

Not: Orijinal dosyadaki basılı sayfalar (s. 2) dijitalleştirilmedi; yalnızca el yazısı sayfalar aktarıldı.

Tüm görüntüye aynı eşikse global eşikleme

bölgesel farklı eşikler local eşikleme

Basic Global Tresholding

Segment the image

Variable Tresholding based on local image processing

Impulse noise tuzbiber gürültüsü

Histogram hesabı yaparken sadece edge'den alacağız

Check görüntüsü var 2. baskıdan

I is number of graylevels

p 'lerin yüzde kaçı t 'nin altında

within group variance

ortalama variance hesabı

Canny edge detection

Smooth the image:

(kalın olmaması için edgelerin)

İki eşik bakıyoruz

Canny'nin hedefi kırık kenar olmayacak.

← Lecture 7 – Examples and image segmentation (edges, gradient, thresholding)Lecture 9 – Hough transform and connected components →

← All Image Processing digital notes