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Wavelet compression of off-axis digital holograms using real/imaginary and amplitude/phase parts

Nature
Compression of digital holograms allows one to store, transmit, and reconstruct large sets of holographic data. There are many digital image...
66 months ago

Fig. 2. A Discrete Wavelet Transform Filter with Quantization,...

ResearchGate
Fig. 2 illustrates the process of compressing, quantizing, encoding, decoding, dequantizing, and reconstructing an image.
80 months ago

Metamaterial bricks and quantization of meta-surfaces

Nature
Controlling acoustic fields is crucial in diverse applications such as loudspeaker design, ultrasound imaging and therapy or acoustic...
92 months ago

Fig. 1. The Wavelet Based Contourlet Transform. a) The process to...

ResearchGate
The Contourlet Transform (CT) can capture the intrinsic geometrical structure of an image. The CT is a redundant transform, and for coding applications this...
81 months ago

Advanced quantum image representation and compression using a DCT-EFRQI approach

Nature
In recent years, quantum image computing draws a lot of attention due to storing and processing image data faster compared to classical...
20 months ago

Figure 9: Visual results for the ‘Barbara’ image with coarse...

ResearchGate
A successful class of image denoising methods is based on Bayesian approaches working in wavelet representations. However, analytical estimates can be...
80 months ago

High-quality restoration image encryption using DCT frequency-domain compression coding and chaos

Nature
With the arrival of the age of big data, the amount and types of data in the process of information transmission have increased...
25 months ago

Compressive sampling based on frequency saliency for remote sensing imaging

Nature
In saliency-based compressive sampling (CS) for remote sensing image signals, the saliency information of images is used to allocate more...
87 months ago

The flowchart of the index encoding and data embedding

ResearchGate
In this paper, we present an approach to efficiently hide sensitive data in vector quantization (VQ) indices and reversibly extract sensitive data from...
44 months ago