Entropy coding of images coded with the wavelet method

U ovom radu riječ je o primjeni entropijskog kodiranja i wavelet transformacije na slike u boji. Cilj ovog rada je dobiti praktično primjenjivi sustav kodiranja slike koji bi imao stupanj kompresije u rangu JPG kodiranja. Na slike u boji je najprije primjenjena wavelet transformacija i nad dobivenim podacima provedene neke optimizacije odnosno aproksimacije i zaokruživanja. Tako dobiveni podaci prosljeđuju se koderu koji kodiraju te podatke i ti podaci se pohranjuju u datoteku na disk. Provedeno je i dekodiranje i rekonstrukcija slike kako bi mogli vidjeti kvalitetu rekonstruirane slike. Dokumentirane su dobivene veličine podataka u nekoliko koraka i komentirani krajnji rezultati. In this paper we talk about the application of entropy coding and wavelet transformation to colored images. The aim of this paper is to obtain a practically applicable image coding system that would have a degree of compression in the range of JPG coding. Wavelet transformation was first applied to color images, and some optimizations, approximations and roundings were performed on the obtained data. The data thus obtained is forwarded to the encoder that encodes that data, and that data is stored in a binary file on disk. Image decoding and reconstruction was also performed to be able to see the quality of the reconstructed image. The obtained data sizes in certain steps are documented and the final results are commented.