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Imbunatatirea calitatii imaginilor

Proiect Sisteme Multimedia
by

ale dream

on 15 April 2014

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Transcript of Imbunatatirea calitatii imaginilor

Se sorteaza pixelii dintr-o matrice in ordine crescatoare si se ia valoarea din mijloc.
Ajustarea contrastului
Modificarea imaginilor color
Reducerea zgomotului
Evidentierea contururilor
Cuprins
Cum am facut?
Bibliografie si resurse
Tehnici de imbunatatire a calitatii imaginilor
Balazs Eniko
Drehuta Carmen

Imaginea se imparte in mai multe blocuri care se egalizeaza separat.
original
ajustare
HSV
ajustare
RGB
ajustare
HSV + RGB
original
ajustarea contrastului
egalizarea histogramei
egalizarea adaptiva a histogramei
CLAHE
Contrast-Limited Adaptive Histogram Equalization
Zgomot - sare si piper
Filtrarea mediana 3x3
Filtrarea mediei
Filtrarea mediei - inlocuirea fiecarui pixel cu media aritmetica a pixelilor din jur intr-o matrice patratica.
Zgomot gaussian
Filtrarea wiener
Zgomot
sare si
piper
Filtrarea medianei
Filtrarea
mediei
Filtrarea
wiener
Zgomot de tip pistrui
Sobel
Canny
Prewitt
pe axa Y
Roberts
Prewitt
pe axa
X si Y
Metoda Canny foloseste maxime locale ale gradientului.
Original
Evidentirea marginilor cu operatorul Laplace
Original
Evidentierea marginilor cu operatorul LoG
Prewitt
pe axa X
Digital Image Processing with Application to Digital Cinema - KS Thyagarajan, Focal Press
An Introduction to Digital Image Processing with MATLAB - Alasdair McAndrew, School of Computer Science and Mathematics
Fundamentals of Digital Image Processing - Chris Solomon, Toby Breckon - WILEY-BLACKWELL
Digital Image Processing Using MATLAB - Gonzales, Woods, Eddins
Introducing Effects in an Image: A MATLAB Approach - Vinay Kumar, Saurabh Sood si Shruti Mishra
http://imageprocessingblog.com/histogram-adjustments-in-matlab-part-i/
http://www.mathworks.com/help/images/
PLATUX Gallery
Full transcript