Open AccessA Novel Framework for Object‐Based Coding and Compression of Hyperspectral Imagery
Author(s) -
Zhao Chunhui,
Li Xiaohui,
Ren Jinchang,
Marshall Stephen
Publication year - 2015
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2015.04.012
Subject(s) - artificial intelligence , computer science , hyperspectral imaging , discrete cosine transform , pattern recognition (psychology) , computer vision , coding (social sciences) , distortion (music) , image (mathematics) , mathematics , amplifier , computer network , bandwidth (computing) , statistics
A novel object‐based framework is proposed for HSI compression, where targets of interest are extracted and separately coded. With objects removed, the holes are filled with the background average to form a new but more homogenous background for better compression. An improved sparse representation with adaptive spatial support is proposed for target detection. By applying the proposed framework to 2D/3D DCT approaches, reconstructed images from conventional and proposed approaches are compared. Six criteria in three groups are employed for quantitative evaluations to measure the degree of data reduction, the distortion of reconstructed image quality and accuracy in target detection, respectively. Comprehensive experiments on two datasets are used for performance evaluation. It is found that the proposed approaches yield much improved results.