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A step-frequency continuous-wave (SFCW) scheme was proposed for millimeter-wave (MMW) inline holography to eliminate the background and twin-image interferences with appropriate range windows. The image reconstruction algorithm is developed for the proposed the hologram approach. A 200GHz prototype experiment is performed to demonstrate the effectiveness of the imaging scheme.
Terahertz (THz) wave has unique properties due to its special position in the electromagnetic spectrum. In recent years, imaging and sensing with THz radiation has aroused considerable interests and is found to be promising for plenty of applications. In this paper, several THz imaging concepts based on sparse information were introduced, such as THz surface layer reconstruction with sparse random...
Hyperspectral images play an important role in real-world applications, such as recognition and remote sensing, etc. How to enhance the spatial resolution of hyperspectral image is still a challenging problem in this field. In this paper, we propose a novel hyperspectral image super-resolution approach by jointly incorporating the sparse, low-rank constraints and spectral mixture priori into a linear...
The classification of stored grain pests based on the computer vision technology is studied in this paper. Combining with compressed sensing sparse representation theory, a novel stored grain pests classification model which meets the RIP condition is proposed. First, the grain pests based on sparse representation classification model is built, and then a condition which satisfied the RIP pest classification...
The emergency of High Dynamic Range (HDR) display device impels the study of generating HDR image from Low Dynamic Range (LDR) image. Most existing generation methods apply complicated handing to highlight areas in image, which perplexes the algorithm and introduces the probability of generating artifacts. In this paper, we investigate a separated scheme: instead of sophisticated treatment to the...
The objective of the research is to prove the 3D reconstruction capability of the range-gated laser imaging technique. To investigate this, we have designed and developed a whole set of system for high precision three-dimensional imaging. The system uses a Nd: YAG electro-optical Q-switched 532nm laser as transmitter, an image intensify tube with double micro channel plate as gated sensor, and all...
Image reconstruction with high resolution based on incoherent detection and phase retrieval algorithm was proposed in Terahertz band. Proof-of-principle experiments were performed to demonstrate the effectiveness of the novel approach, which has potential applications in non-destructive detection of materials with low system cost and complexity.
Typical passive millimeter wave (PMMW) sensors with focal plane array (FPA) are placed on a rectangular grid to sample the image plane. Since the sensors must be made large enough to sense PMMW wavelengths, the sensor density that can be achieved is limited. In fact, the sensors may not be spaced closely enough to sample the image at Nyquist density. A novel design scheme based on focal plane array...
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