The technology of binocular camera matures day by day. Compared with monocular camera, it can obtain higher resolution images at a lower cost than monocular cameras. However, existing high dynamic range methods based on images acquired by monocular camera, causing the result images to be noisy and blurry. In order to solve the problem, this paper presents a new high dynamic range method based on monochrome-color camera system. We first use the camera system to obtain multiple sets of different exposure monochrome-color image pairs, and then match the same exposure image pair. By using the color propagation methods, we combine the color information from color image with detail information from monochrome image, and obtain multiple sets of different exposures, sharper, low-noise images with more details. And finally get the result through high dynamic imaging and tone mapping. Experiments show that our method is better than the results of the classical method.
An ultra-broad band single-polarization single-mode photonic crystal fiberis investigated based on zero order Surface Plasmon Polariton (SPP) mode by using the full vector finite element method. Highly wavelength-dependent transmission is obtained because of the bonding zero-order SPP mode stimulated over the interface of gold/liquid. With a filled refractive index (RI) of 1.52, the polarization extinction is higher than 30dB/cm among a large bandwidth of 360 nm in the second communication window. Meanwhile, the linear relationship between the resonant wavelength of the bonding zero-order SPP mode and the RI value of the filled liquid, make it a good candidate for liquid RI sensor with high linearity and sensitivity.
A microstructured fiber based surface plasmon sensor with a high sensitivity of 2.4×10-6 was proposed using an central
analyte-filled channel in the core region. Through the analyte modulation, the variation trend of the resonance loss with
the analyte refractive index was demonstrated to be contrary to that of the sensitivity. In this way significantly
enhancement in the detection accurary can be achieved. The resolution of the sensor was also improved by properly
choosing the size of the central hole. With analyte infiltration into the core, the calibration curve of the sensor can be
effectively linearized, partially alleviating the difficulty in data processing.
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