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3149 results about "Dot matrix" patented technology

A dot matrix is a 2-dimensional patterned array, used to represent characters, symbols and images. Every type of modern technology uses dot matrices for display of information, including mobile phones, televisions, and printers. They are also used in textiles with sewing, knitting, and weaving.

Method for recognizing license plate character based on wide gridding characteristic extraction and BP neural network

The invention discloses a vehicle license plate character recognition method based on rough grid feature extraction and a BP neural network. The method comprises the following steps: (1). preprocessing a vehicle license plate image to eliminate various interferences and obtain a minimum vehicle license plate region; (2). segmenting the vehicle license plate characters by combining vertical projection and a drop-fall algorithm; (3). screening the segmentation results to eliminate interferences of vertical frames, separators, rivets and the like; (4). normalizing the characters according to the position of a centre of mass; (5). taking each pixel of a normalized characters dot-matrix as a grid to extract the original features of the characters; (6). designing the BP neural network with a secondary classifier according to the situation of the vehicle license plate; and (7). reasonably constructing a training sample database to train the neural network, and adjusting the training samples by the recognition effect to realize accurate recognition of the network. The method effectively eliminates the noise interference, quickly and accurately segments the characters, steadily and effectively recognizes Chinese characters, and realizes the balance between real-time property and accuracy in the whole recognition course.
Owner:ZHEJIANG NORMAL UNIVERSITY

Information input/output method using dot pattern

This invention, by imparting different functions to respective dots of a dot pattern which is displayed on a printed material etc., aims to enable informatization expeditiously by recognizing directionality, on the occasion of informatization from the dot pattern, and to enable checking an error of a layout state of dots, and further, to heighten security. In this connection, in this invention, on a medium surface of a printed material etc., a plurality of lattice dots 4 are disposed in a rectangular shape and set as a block, and they are regularly and continuously disposed, and such a dot that 1 piece of the lattice dots 4 which exists in the block was disposed by being shifted unidirectionally is set as a key dot 2, and by setting said key dot 2 as a representative point, they are disposed at a circumference of the key dot 2, and by setting a center which was surrounded by the lattice dots 4 of 4 points as a hypothetical point, and by setting this as a start point, at an end point which was represented by a vector, a plurality of information dots 3 which have various information recognized are arranged in accordance with a predetermined rule by a dot code generation algorithm to thereby generate a dot pattern 1, and the dot pattern 1 is imported as image data by a camera, and, from a numerical value which was calculated by digitizing this, information, a program are outputted.
Owner:YOSHIDA

Vehicle information detecting and recognizing system under multilane condition

The invention discloses a vehicle information detecting and recognizing system under the multilane condition. The vehicle information detecting and recognizing system comprises a computer system and a portal frame stretching over lanes, wherein a laser scanner and a high-definition license plate recognition device are arranged on the portal frame, a first dot matrix type wheel shaft sensor, a shaft weight sensor and a second dot matrix type wheel shaft sensor are sequentially arranged on the lane under the portal frame, and the laser scanner, the high-definition license plate recognition device, the first dot matrix type wheel shaft sensor, the shaft weight sensor and the second dot matrix type wheel shaft sensor are respectively connected with the computer system. The vehicle information detecting and recognizing system has the advantages that the two-dimension cross section size and the running position of a vehicle are detected through the laser scanner, and the vehicle three-dimension reconstitution and the vehicle separation are realized; the license plate information and the human face information are precisely collected through the license plate recognition device; the vehicle information such as the shaft distance, the shaft length, the shaft number, the shaft type, the wheel distance, the wheel width and the wheel number are measured according to signals output after a vehicle tyre presses the wheel shaft sensor; and the shaft weight and the total weight are measured through the shaft weight sensor.
Owner:广州顺如电子科技有限公司

Laser scanning imaging nondestructive inspection method for hot continuous casting blank surface defects

The invention discloses a laser scanning imaging nondestructive inspection method for hot continuous casting blank surface defects, comprising the following steps: 1) transversely irradiating a casting blank by a laser emitter to obtain a laser line; 2) scanning the laser line by utilizing an area array CCD image sensor; 3) extracting information representing the defect depths from the laser line so as to obtain a one-dimensional distance dot matrix formed by assembling the defect depths of the casting blank at the transverse position; and 4) mapping the one-dimensional distance dot matrix into gray level images with different gray levels; 5) splicing the gray level images at different transverse positions of a hot blank so as to obtain a whole gray level image; and 6) identifying the defects on the surface of the casting blank and reconstructing a casting blank surface tri-dimensional topographic image. The intention can effectively inhibit interference from a flaky scale on the high temperature casting blank surface which is not a defect but presents a defect state and water films so as to avoid the pseudo-defects from influencing detection precision, accurately identify defect target images and realize quantized detection of the defect depths, thereby realizing online detection of the defect states and depths of the surface of the casting blank under a high temperature state.
Owner:CHONGQING UNIV

Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof

The invention discloses an aluminum-based dot matrix material based on 3D printing technology. In the dot matrix material, industrial pure aluminum or any aluminum alloy is employed as a base body. Unit cell configuration and a periodic structure thereof are modeled and designed with CATIA software and the model is produced from high-molecular materials through the 3D printing technology. An investment casting shell mould is prepared from soluble gypsum and the aluminum-based dot matrix material is prepared through an air-pressure seepage process. The aluminum-based dot matrix material can be in a pyramid type, a Kagome type and a grating type in the unit cell configuration. The invention also provides a sandwiched plate composite structure composed of the dot matrix material and a compact surface plate. The diameter of a unit cell bar is 0.5-5.0 mm, the length of the unit cell bar is 0.5-15.0 mm, and an included angle between the unit cell bar and a protective surface is 30-70 degrees. The compact surface plate is made from industrial pure aluminum, aluminum alloy, iron alloy or high-molecular materials. The dot matrix material with the industrial pure aluminum as the base body can reach higher than 5 MPa/g*cm<-3> in specific compressive strength.
Owner:INST OF SOLID PHYSICS ACAD SINICA

Display device and fingerprint identification method thereof and electronic device

An embodiment of the invention discloses a display device and a fingerprint identification method thereof and an electronic device. The display device comprises a display panel and a cover plate arranged on the display panel. The display panel comprises an array substrate, an organic light-emitting layer arranged at one side, facing to the cover plate, of the array substrate, and a fingerprint identification array. The organic light-emitting layer comprises a plurality of organic light-emitting structures. A first surface, away from the array substrate, of the cover plate is a light output surface of the display device. In the fingerprint identification stage, the plurality of organic light-emitting structures realize displacement and light emitting according to a first light-emitting dot matrix; the distance between any two adjacent organic light-emitting structures in the first light-emitting dot matrix is larger than or equal to minimum no-crosstalk distance; and the minimum no-crosstalk distance is the maximum radius of a coverage area formed on the fingerprint identification array when light emitted by any one organic light-emitting structure is reflected by the first surface of the cover plate. Fingerprint identification units are not influenced by crosstalk of other organic light-emitting structures, so that fingerprint recognition accuracy of the display device can be improved.
Owner:SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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