Banner

Hyperspectral image coding and transmission scheme based on wavelet transform and distributed source coding

Multimedia Tools and Applications • 2017
العودة
معلومات البحث
المؤلفون Ahmed Hagag, Xiaopeng Fan, Fathi E Abd El-Samie
الكلمات المفتاحية Not Available
المجلة العلمية Multimedia Tools and Applications
الناشر Springer US
المجلد 76
العدد Not Available
الصفحات 23757-23776
publication.type International
رابط البحث Open Link
المواد المرفقة Not Available
الملخص
This paper presents a novel scheme for satellite hyperspectral images broadcasting over wireless channels. First, a simple pre-processing is performed. Then, a new hyperspectral band ordering algorithm that improves the compression performance is implemented. The ordered image data is also normalized. The discrete wavelet transform with three-level decomposition is used to divide each hyperspectral image band into ten wavelet sub-bands; nine of them are the details and the last LL-LL-LL is an approximation version of the band. Coset coding based on distributed source coding (DSC) is used for the LL-LL-LL sub-band to achieve high compression efficiency and low encoding complexity. Then, without syndrome coding, the transmission power is allocated directly to the band details and coset values according to their distributions and magnitudes without forward error correction (FEC). Finally, these data are transformed by the Hadamard matrix and transmitted over a dense constellation. Satellite hyperspectral images from an Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) satellite are used for the validation of the proposed scheme. Experimental results demonstrate that the proposed scheme improves the average image quality by 6.91, 3.00 and 7.68 dB over LineCast, SoftCast-3D, and Softcast-2D, respectively. It also achieves up to a 5.63 dB gain over JPEG2000 with FEC.