The Experts below are selected from a list of 72 Experts worldwide ranked by ideXlab platform
Wenshan Duan - One of the best experts on this subject based on the ideXlab platform.
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a method and technique for observing the stereo Pseudocolor Image of phase change of objects
Review of Scientific Instruments, 2000Co-Authors: Guanying Chen, Wenshan DuanAbstract:A real-time white light stereo Pseudocolor encoding method and technique in a microscope is presented, which demonstrated that the phase information of an object is not totally lost in incoherent imaging. The Image system is an improved microscope and attached optical elements can be stacked together in the microscope tube, so the structure is compact. The irradiance distribution at the output plane of the microscope is obtained by means of the theory of partially coherent light. At the conditions of that the aperture stop and focal length of condenser are a right magnitude, and the illuminative light source is incoherent or partially coherent, the theoretical analysis indicates that the irradiance distribution at output plane is presented by the stereo Pseudocolor Image which is characterized by the phase rate-of-change function of input object. A bleached holographic grating as an input object is observed, and its optical parameters are measured directly. Experimental results are discussed, which basica...
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A real-time Pseudocolor encoding technique for the phase rate-of-change in the imaging system of microscope
Optics Communications, 1999Co-Authors: Guanying Chen, Wenshan DuanAbstract:A real-time white light stereo Pseudocolor encoding technique for the phase rate-of-change in the imaging system of microscope is presented. It is analyzed by the theory of partially coherent light. The analytic results showed that the information about phase rate-of-change of the input object function is reflected in the output stereo Pseudocolor Image under given conditions and illuminated by incoherent source.
Fanglin Peng - One of the best experts on this subject based on the ideXlab platform.
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Changeable density Pseudocoloring with diffraction of dual phase gratings
Optics Communications, 1992Co-Authors: Fanglin PengAbstract:Abstract A phase grating instead of an amplitude grating is used to change the Pseudocolor Image of a grating encoded phase picture more effectively and producing brighter Images. Analytic formulae are presented to explain this experiment. Calculations prove that in addition to translating the phase grating, altering its phase modulation degree can also change the Pseudocolor Images effectively.
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Changing the Pseudocolor of a grating encoded phase picture using a grating
Optics Communications, 1992Co-Authors: Fanglin PengAbstract:Abstract Analystic formulae, based on Fourier optics, are presented to explain the experiment of changing the Pseudocolor of a grating encoded phase picture using a grating superposed on the phase picture. The superposed grating and the encoded picture are considered as a composite grating theoretically and its Fourier spectra are calculated. The Fourier spectra of the composite grating are different from that of the encoded phase picture, and can be changed by translating the superposed grating, so the Pseudocolor Image generated by the composite grating will vary with the translation of the superposed grating.
Guanying Chen - One of the best experts on this subject based on the ideXlab platform.
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a method and technique for observing the stereo Pseudocolor Image of phase change of objects
Review of Scientific Instruments, 2000Co-Authors: Guanying Chen, Wenshan DuanAbstract:A real-time white light stereo Pseudocolor encoding method and technique in a microscope is presented, which demonstrated that the phase information of an object is not totally lost in incoherent imaging. The Image system is an improved microscope and attached optical elements can be stacked together in the microscope tube, so the structure is compact. The irradiance distribution at the output plane of the microscope is obtained by means of the theory of partially coherent light. At the conditions of that the aperture stop and focal length of condenser are a right magnitude, and the illuminative light source is incoherent or partially coherent, the theoretical analysis indicates that the irradiance distribution at output plane is presented by the stereo Pseudocolor Image which is characterized by the phase rate-of-change function of input object. A bleached holographic grating as an input object is observed, and its optical parameters are measured directly. Experimental results are discussed, which basica...
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A real-time Pseudocolor encoding technique for the phase rate-of-change in the imaging system of microscope
Optics Communications, 1999Co-Authors: Guanying Chen, Wenshan DuanAbstract:A real-time white light stereo Pseudocolor encoding technique for the phase rate-of-change in the imaging system of microscope is presented. It is analyzed by the theory of partially coherent light. The analytic results showed that the information about phase rate-of-change of the input object function is reflected in the output stereo Pseudocolor Image under given conditions and illuminated by incoherent source.
Hiroshi Nabetani - One of the best experts on this subject based on the ideXlab platform.
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Visualization of the distribution of multiple constituents in bread dough by use of Fluorescence Fingerprint Imaging
Procedia food science, 2011Co-Authors: Mito Kokawa, Kaori Fujita, Junichi Sugiyama, Mizuki Tsuta, Mario Shibata, Tetsuya Araki, Hiroshi NabetaniAbstract:Abstract A method combining fluorescence fingerprint (FF) measurement with an imaging technique was developed to visualize the distributions of gluten and starch in dough. The fluorescence Images of dough at the under-, optimum- and over-mixing stages were taken with a charged coupled device (CCD) camera in multiple excitation and emission wavelengths constructing the FF. This data containing the FF data of each pixel in the sample Image was colored according to the similarity of the FF of each pixel and the FF of gluten or starch. Furthermore, the areas corresponding to air bubbles in the dough were masked in black. The resulting Image, referred to as the FF Pseudocolor Image, showed the distributions of gluten and starch in the dough with the incorporated bubbles. Quantitative parameters concerning gluten and starch distributions and bubble area were extracted from the dough Images at each mixing stage. It was shown that in the under-mixing stage, the distributions of gluten and starch were more uneven and the bubbles were smaller than those in the optimum-mixing stage. The evenness of gluten and starch distributions stayed nearly the same from the optimum- to over-mixing stages but the total bubble area increased significantly. This imaging method is suggested to have an advantage over conventional imaging methods such as light or electron microscopy, since there is no need to preprocess the sample, and any constituent in the sample can be visualized as long as there is information about the FF of the pure target constituent.
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Quantification of the distributions of gluten, starch and air bubbles in dough at different mixing stages by fluorescence fingerprint imaging
Journal of Cereal Science, 2011Co-Authors: Mito Kokawa, Kaori Fujita, Junichi Sugiyama, Mizuki Tsuta, Mario Shibata, Tetsuya Araki, Hiroshi NabetaniAbstract:Abstract A method combining fluorescence fingerprint (FF) measurement with an imaging technique was developed to visualize the distributions of gluten and starch in dough. The fluorescence Images of dough at the under-, optimum- and over-mixing stages were acquired in multiple excitation and emission wavelengths constructing the FF. This data containing the FF data of each pixel in the sample Image was colored according to the similarity of the FF of each pixel and the FF of gluten or starch. Furthermore, the areas corresponding to air bubbles in the dough were masked in black. The resulting Image, referred to as the FF Pseudocolor Image, showed the distributions of gluten and starch in the dough with the incorporated bubbles. Quantitative parameters concerning gluten and starch distributions and bubble area were extracted from the dough Images at each mixing stage, showing the homogenization of gluten and starch and the incorporation of bubbles with mixing. This imaging method is suggested to have an advantage over conventional imaging methods since there is no need to preprocess the sample, and any constituent in the sample can be visualized as long as there is information about the FF of the pure target constituent.
Lu Zukang - One of the best experts on this subject based on the ideXlab platform.
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Laser-Induced Fluorescence Bronchoscopy for Detection and Localization of Early Lung Cancer
Chinese Journal of Lasers, 2001Co-Authors: Xie Shusen, Li Buhong, Lu ZukangAbstract:Experimenatal results on the development of a Laser Induced Fluorescence Bronchoscopy(LIFB) for the detection and localization of early lung cancer are reported in this paper. The system utilizes fluorescence of photosensitizer drug to provide real time video imaging for the examined lung tissue. Color filters are used to differentiate signal from background and a computer Image processing technique is also applied to subtract the background. Moreover, a Pseudocolor contrast enhancement method was developed to enhance the fluorescence Image displayed on the vidio monitor. Suspicious areas are identified by Pseudocolor Image to guide biopsy, and several clinical trials show that sensitivity and contrast capability of the system should permit the detection and localization of early lung cancer.
