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Title:ALGORITMI VERIŽNIH KOD
Authors:ID Lebeničnik, David (Author)
ID Žalik, Borut (Mentor) More about this mentor... New window
Files:.pdf UNI_Lebenicnik_David_2011.pdf (1,42 MB)
MD5: B068A456F8E107A905DD3A4CEEBBFD18
PID: 20.500.12556/dkum/0e27ede3-bc84-46ae-afae-ac219fa9e1db
 
Language:Slovenian
Work type:Bachelor thesis/paper
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Algoritmi verižnih kod so algoritmi stiskanja brez izgube obrisov črnobelih rastrskih objektov. Pri verižnih kodah zakodiramo smer premika iz trenutnega v naslednji piksel. S premikanjem nadaljujemo, dokler ne pridemo do začetne točke. Implementirali smo štiri algoritme verižnih kod: 4-smerno Freemanovo kodo, 8-smerno Freemanovo kodo, ogliščno verižno kodo in stisnjeno verižno kodo. Najboljše rezultate glede števila bitov, potrebnih za kodiranje premika, da stisnjena verižna koda. Sledita ji 4-smerna Freemanova verižna koda in ogliščna verižna koda, ki v povprečju porabita približno enako število bitov. Najmanj učinkovita je 8-smerna Freemanova koda.
Keywords:Verižne kode, 4-smerna Freemanova verižna koda, 8-smerna Freemanova verižna koda, ogliščna verižna koda, stisnjena verižna koda
Place of publishing:Maribor
Publisher:[D. Lebeničnik]
Year of publishing:2011
PID:20.500.12556/DKUM-20451 New window
UDC:004.94(043.2)
COBISS.SI-ID:15875862 New window
NUK URN:URN:SI:UM:DK:CITQFMLN
Publication date in DKUM:04.10.2011
Views:2154
Downloads:178
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Secondary language

Language:English
Title:CHAIN CODE ALGORITHMS
Abstract:Chain code algorithms are lossless compression algorithms for compressing borders of black and white raster objects. The chain codes code the direction of the movement from the considered to the next pixel. This movement is executed until the initial point is reached. We have implemented four chain code algorithms: Freeman chain code of four directions, Freeman chain code of eight directions, vertex chain code, and compressed vertex chain code. Considering the number of the bits needed for the code, the best results are obtained by the compressed vertex chain code. It is followed by Freeman chain code of four directions and vertex chain code, which both use approximately equal number of bits. Freeman chain code of eight directions uses the highest number of bits.
Keywords:Chain code, Freeman chain code of four directions, Freeman chain code of eight directions, vertex chain code, compressed vertex chain code


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