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1702 results about "Three dimensional data" patented technology

Optical object recognition system

An object recognition system comprises a memory for storing a plurality of distance ranges with different distance labels associated with respective distance ranges. The controller converts measured distance values into distance labels according to distance ranges to which the distance values belong. The controller groups the sections or windows of a captured image based on assigned distance labels. Detection area or viewing area of the sensors is divided into a plurality of distance ranges according to tolerance of the measured distance such that broader distance range is defined as the distance from the system is larger. The controller scans the windows with distance labels using a template that defines a joining relationship for the windows and assigns each window with a cluster label that is a combination of the distance label and a occurrence indicia, which is the same for the windows that satisfy the joining relationship. The controller unites the windows having the same cluster labels into a cluster, generates three dimensional data of each of said clusters and combines the clusters that are positioned close to each other based on the three dimensional data to form a candidate of a physical object. The system includes a memory for storing three dimensional data of one or more physical objects that were recognized in previous recognition cycle. The controller infers a physical object which would be recognized in the current cycle based on the stored data and a speed of the vehicle relative to the physical object. The controller compares the inferred physical object with said candidate of a physical object to recognize a physical object.

Combined three-dimensional digital imaging method of digital speckle projection and phase measuring profilometry

The invention relates to a combined three-dimensional digital imaging method of digital speckle projection and phase measuring profilometry. The method comprises the following steps: (1), a random digital speckle pattern is projected onto an object and acquired through two cameras on left and right sides; (2), a sinusoidal fringe pattern is projected onto the object, and a corresponding sinusoidal fringe pattern is acquired; (3), the folded phase value of a coding fringe pattern is calculated; (4), a series of points (Pr1 to Prn) on the right camera corresponding to a point P1 on the left camera are searched according to the folded phase value; (5), the point Pr on the right camera corresponding to the point P1 is fixed in the position of P1 according to the acquired digital speckle pattern; (6), processes of the step (4) and (5) are performed to all points on the left and right cameras, to find all the corresponding point pairs; (7), the corresponding point pairs are re-established into three-dimensional point cloud data. The method has the advantages that the imaging speed is fast, small calculated amount, accurate result, and the method is suitable for the fields of on-line three-dimensional detection and dynamic three-dimensional data acquisition with higher accuracy and speed requirements.

Structuring method for three-dimensional visualizing system of urban synthesis pipeline network

The invention relates to a structuring method for a three-dimensional visualizing system of an urban synthesis pipeline network. The method comprises the following steps: establishing a central database for the urban synthesis pipeline network; establishing a two-dimensional texture database; setting a spatial data engine; reading and modeling to the central database and the texture database through the spatial data engine to construct overground and underground two-dimensional views and a three-dimensional visualization scene; and establishing a corresponding relation between two and three dimensional data planes and visual planes, wherein the data planes correspond to and the geographic coordinates of the two-dimensional view and the three-dimensional scene of the system, the visual planes correspond to various spacial geographical object models in the three-dimensional scene and map symbols of the two-dimensional view, the purpose of two-dimensional and three-dimensional linkage isachieved, the function which is not easy to realize in the three-dimensional scene or the macroscopic function is realized through the two-dimensional view, the function which cannot be realized in the two-dimensional view or the function which is less real is realized through the three-dimensional scene, so that the purpose of complementing each other is achieved, and the effective management ofthe urban synthesis pipeline network is further realized.
Owner:苏州市数字城市工程研究中心有限公司 +1
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