摘要:
A gray code encoding and decoding method applied to holographic storage devices is proposed. The encoding method uses gray levels of a 2D detector to encode a certain amount of original bits of the original data, and then sends them to a spatial light modulator (SLM) for encryption. The decoding method corrects the received gray levels to the original gray levels, and then compares the maximum gray level with the original gray levels to decode the original gray level into binary data. The proposed encoding and decoding method can better make use of storage locations of the 2D detector and get a code rate close to 1.
摘要:
A gray code encoding and decoding method applied to holographic storage devices is proposed. The encoding method uses gray levels of a 2D detector to encode a certain amount of original bits of the original data, and then sends them to a spatial light modulator (SLM) for encryption. The decoding method corrects the received gray levels to the original gray levels, and then compares the maximum gray level with the original gray levels to decode the original gray level into binary data. The proposed encoding and decoding method can better make use of storage locations of the 2D detector and get a code rate close to 1.
摘要:
A gray level weighting centroid method for holographic data storage is disclosed. Firstly, a first gray level image having a plurality of blocks is received. Then, a convolution calculation is performed on a weight matrix and the image, so as to obtain a second gray level image having a plurality of blocks each having a gray level value. The gray level values are divided into a bright gray level value and a dark gray level value by a threshold value, so as to convert the second gray level image into a thresholding image and find the positions of the borders of the blocks corresponding to the bright gray level value. Next, the blocks surrounded by the positions of the borders and respectively used as a centroid block are found by making the positions of the borders correspond to the first gray level image. Finally, the centroid block is calculated to obtain a centroid point.
摘要:
The apparatus for scanning at least one hyper-spectral image comprises an optical system, the hyper-spectrometer and the relay module. The hyper-spectrometer is disposed apart from the optical system. The optical system can focus an optical image of a target in a focal plane thereof, where the focal plane contains a plurality of row portions of the optical image. The relay module can selectively relay one of the row portions of the optical image to the hyper-spectrometer. Moreover, a method for scanning at least one hyper-spectral image is disclosed in specification.
摘要:
A method to determine a fiducial point for holographic data storage is disclosed, which utilizes a gray-level frame to sequentially retrieve a regional image used as a retrieved image with the size equal to that of the frame from a received gray-level image. The gray-level frame is compared with each retrieved image to obtain a plurality of values and construct a 2D proto-matrix. The 2D proto-matrix is transformed into a 2D matrix via letting the values smaller than 0 be 0. The 2D matrix and a retrieving matrix, which has a dimensionality equal to or smaller than that of the frame, are used to obtain an anchor matrix. A greatest value in the central region of the 2D matrix is found to function as an anchor value according to the anchor matrix, thereby find a fiducial point in the gray-level image.
摘要:
A placement multi-band bioassay device makes use of a light source illuminating by several specific wavelengths, or several tunable wavelengths, or employs a device capable of capturing spectral medical images of specific bands inside the human body, e.g., the digestive system, the oral cavity, the nasal cavity, the anus, and the vagina, so as to decide the nidus. Higher discrimination rates can be obtained for some diseases or supernumerary cells to accomplish the object of “prevention is better than cure”.
摘要:
A waveguide for tympanic thermometer formed by an elongate hollow member having substantially ellipsoidal shape truncated at both ends along its major axis direction. The waveguide is interposed between a tympanic membrane of which the temperature is to be measured and an infrared radiation sensor so as to guide the infrared radiation from the tympanic membrane to the sensor. Alternatively, the waveguide may also be a hollow member including an end portion having a gradually reduced inner diameter toward the side of sensor. The gradually reduced end portion is preferably of a truncated half ellipsoidal shape having a length between about 1/10 to about 1/3 of the distance from the sensor to the distal end of the waveguide.
摘要:
A microscanning system including a microscope, a relay lens device, a stepping motor and a hyper-spectrometer is disclosed. The microscope is adapted to acquire and enlarge an image of an object to generate an enlarged image which is a 2D image distributed along the first direction and second direction. The relay lenses device disposed behind the microscope receives and transfers the enlarged image outputted by the microscope. The stepping motor electrically connected to the relay lens device reciprocates the relay lens linearly in the first direction device in a stepwise manner along the second direction. . The hyper-spectrometer disposed behind the rely lens device receives the partial enlarged images of the object along the first direction that are transferred by the relay lens device sequentially along the second direction, and transform the partially enlarged images into the corresponding spectrum information.
摘要:
The present invention is to provide a thin type vacuum chamber device, wherein two hollow slabs are fastened by a claw fastener to form a thin type simple structure that can maintain a high vacuum state, and wherein the air inside the chamber is pumped out to attain a vacuum state with a high pressure suction activity. The thin-chamber design of the present invention can decrease the number of the components and reduce the cost. The special assembly design of the vacuum chamber of the present invention can effectively decrease the length of the transmission cable and thus can reduce signal attenuation and noise interference. The present invention has the advantage of convenient operation and is very suitable to a two-dimensional infrared sensor.
摘要:
The present invention discloses a chromatics-based reading/writing system and method. In the present invention, the chromatics-based reading/writing system comprises: a color dot reading/writing device; a color dot recording medium recording data in the color-dot form; and a computer system coupled to the color dot reading/writing device, coding data into setting values of color dots, controlling the color dot reading/writing device to write data on the color dot recording medium in the form of color dots according to the setting values of color dots, controlling the color dot reading/writing device to read color dots on the color dot recording medium, and decoding the setting values of the color dots into the original data.