研究目的
To propose a new heterogeneous compressive sensing method for visible/near-infrared remote sensing cameras that allocates sensing resources based on texture-feature information to improve compression performance and reconstruction quality.
研究成果
The proposed heterogeneous compressive sensing method effectively improves compression performance and reconstruction quality by allocating more sensing resources to high-frequency regions, as confirmed by experimental results on multiple remote sensing image sets. It offers a good trade-off between complexity and performance, making it suitable for onboard applications. Future work will explore advanced reconstruction algorithms like deep learning.
研究不足
The reconstructed quality depends on the reconstruction algorithm; the method may require optimization for FPGA implementation to reduce resource usage and time further; applicability to multispectral and hyperspectral images is theoretical and not fully tested.
1:Experimental Design and Method Selection:
The study uses a heterogeneous compressive sensing (HCS) method with a secondary transform (Hadamard transform) to guide sensing resource allocation based on texture features. It involves wavelet transform, CS guiding spectrum detection, and sensing measurements.
2:Sample Selection and Data Sources:
Remote sensing images from Quickbird, ASTER, and IKONOS satellites are used, with bit depths of 8 bits and various sizes (e.g., 1024x1024 pixels).
3:List of Experimental Equipment and Materials:
A self-developed compression testing platform includes an image simulation source, compression system with Virtex-PRO Xilinx FPGA processor (MicroBlaze), compression and storage server, decoding unit, and display system.
4:Experimental Procedures and Operational Workflow:
Images are transformed into wavelet subbands, organized into blocks, secondary transform applied to extract CS guiding spectrum, sensing resources allocated heterogeneously, and compression performed. Performance is evaluated using PSNR, MSSIM, VIF, and compression time.
5:Data Analysis Methods:
Statistical analysis using PSNR, MSSIM, and VIF metrics to compare with conventional methods; complexity analysis based on processing time and FPGA resource usage.
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