20.500.12556/RUL-120196 Stiskanje slik delo diplomskega seminarja Image compression Stiskanje slik je danes nepogrešljiv del vsakodnevnega življenja ljudi. Ločimo dva postopka, stiskanje z izgubami in stiskanje brez izgub. Eden izmed najbolj uporabnih algoritmov za stiskanje je JPEG algoritem, ki temelji na stiskanju z izgubami. Za učinkovito stiskanje uporabi diskretno kosinusno transformacijo, ki pretvori sliko v frekvenčno domeno, kjer lažje odstrani nepomembne dele. Kljub temu, da se ponavadi nekaj podatkov pri poteku JPEG algoritma izgubi, lahko z inverznim algoritmom rekonstruiramo približek originalne slike. Rekonstruirana slika ni čisto enaka prvotni, ji je pa toliko podobna, da ponavadi s človeškim očesom ne zaznamo razlike. Image compression is nowadays an indispensable part of our daily lives. It falls into two groups, lossy compression and lossless compression. One of the most useful image compression algorithms is JPEG algorithm, which belongs to the lossy compression group. For efficient compression, JPEG algorithm uses the discrete cosine transformation, which transforms the image into a frequency domain, that we can more easily remove insignificant parts of the image. Despite the fact that the data is lost during the JPEG algorithm, we can retrieve this data in the reverse order of compression and reconstruct the approximation of original image. Reconstructed image is not exactly the same as the original, but it is so similar that we usually do not notice the difference with our human eye. stiskanje slik JPEG standard osnovni JPEG algoritem diskretna kosinusna transformacija kvantizacija cik-cak skeniranje Huffmanovo kodiranje razširjanje slik image compression JPEG standard main JPEG algorithm discrete cosine transform quantization cik-cak scanning Huffman coding image decompression true false false Slovenski jezik Angleški jezik Delo diplomskega seminarja/zaključno seminarsko delo/naloga 2020-09-17 08:15:17 2020-09-17 08:15:22 2024-05-29 14:34:32 0000-00-00 00:00:00 2020 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.6 110552 58404867 1481.pdf 1481.pdf 1 9B97CAF5C3E23FBDC08058B137207C85 138e41c9b2c0784960ddc43afec74eb41bd25715c1a8a374cd145135c928ece9 06224275-a1ba-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134976 Fakulteta za matematiko in fiziko 0 0 0