Abstract: An apparatus and a method for decoding a 3D map, and an encoded bitstream of a 3D map are provided. The apparatus for decoding a 3D map includes a transmitter and a decompressor. The transmitter is configured to receive a bitstream of a 3D map, where the 3D map includes a plurality of 3D map points. The decompressor is configured to decompress the bitstream of the 3D map to obtain reconstructed data of the 3D map, where the reconstructed data of the 3D map includes reconstructed data of the plurality of 3D map points. In this application, the decompressor end may support decompression of compressed data of the 3D map, to support compression/decompression of data of the 3D map.

Abstract: Embodiments of this application belong to the field of 3D map technologies, and disclose methods and apparatuses for compressing and decompressing a 3D map, to reduce a data volume of a 3D map. The method for compressing a 3D map includes: obtaining a 3D map descriptor, where the 3D map descriptor corresponds to at least one 3D map point of the 3D map; performing binarization on a relationship between the 3D map descriptor and at least one preset threshold vector to obtain binary data; and performing quantization on a difference between the 3D map descriptor and the at least one preset threshold vector to obtain quantized data. In embodiments of this application, storage space required for storing a 3D map can be reduced, or transmission resources required for transmitting a 3D map can be reduced.

Abstract: A three-dimensional (3D) map compression method includes performing compaction processing on a to-be-encoded descriptor to obtain a first compact representation of the to-be-encoded descriptor, where the to-be-encoded descriptor corresponds to at least one 3D map point on a 3D map. A compact representation of at least one reference descriptor corresponding to the to-be-encoded descriptor is obtained, followed by obtaining a second compact representation of the to-be-encoded descriptor based on the first compact representation of the to-be-encoded descriptor and the compact representation of the at least one reference descriptor and encapsulating the second compact representation to obtain a bitstream of the 3D map.

Abstract: An apparatus and a method for encoding a 3D map are provided. The apparatus for encoding a 3D map includes a compression module (51) and a transmission module (52). The compression module (51) is configured to compress data of a 3D map to obtain a bitstream of the 3D map, where the 3D map includes a plurality of 3D map points, and the data of the 3D map includes data of the plurality of 3D map points. The transmission module (52) is configured to transmit the bitstream of the 3D map. With the use of the apparatus, a data volume of a 3D map can be reduced, thereby reducing transmission bandwidth and improving transmission efficiency.

Abstract: A method and an apparatus for retrieving a 3D map is provided. The method for retrieving a 3D map includes: obtaining binary data of a plurality of 3D map descriptors, where the plurality of 3D map descriptors correspond to at least one 3D map point of a 3D map; obtaining a retrieval descriptor, where the retrieval descriptor is a feature that corresponds to a real environment and that is extracted from visual information collected by a sensor of an electronic device; and performing retrieval in the binary data of the plurality of 3D map descriptors based on binary data of the retrieval descriptor, to obtain at least one target 3D map descriptor, where a length of binary data of each of the plurality of 3D map descriptors is different from a length of the binary data of the retrieval descriptor.

Abstract: The invention discloses a method, a system, a device, and a medium for detecting a battery state of health. The method includes extracting a target curve segment from a first charging characteristic curve of a battery under test; and determining, according to a corresponding relation between characteristic parameters of the target curve segment and the battery state of health, the battery state of health matching the characteristic parameters of the target curve segment, and determining the battery state of health as the battery state of health of the battery under test. By utilizing said corresponding relation as the calculation basis, the invention improves the reliability and accuracy of the detection of battery state of health detection. The invention also tracks instances of abusive conditions that accelerate battery aging, assessing whether such conditions accelerate battery degradation and issuing warnings accordingly.

Abstract: The invention discloses a method, a system, an electronic device, and a storage medium for determining performance of a power battery. The method includes the following steps: acquiring historical data of the power battery in at least two charging processes; determining, according to historical data in one charging process, a dQ/dV curve and a direct current internal resistance corresponding to said charging process; calculating a relative change rate of internal resistance capacity in any two charging processes; and determining the performance of the power battery according to the relative change rate of internal resistance capacity and a relative change rate of internal resistance capacity range corresponding to fault type. The invention can effectively determine whether the performance of the power battery is abnormal by combining, in the two charging processes, the target peak value of a dQ/dV curve of the power battery and the change in direct current internal resistance.

Abstract: The present disclosure discloses a photography-based 3D modeling system and method, and an automatic 3D modeling apparatus and method, including: (S1) attaching a mobile device and a camera to the same camera stand; (S2) obtaining multiple images used for positioning from the camera or the mobile device during movement of the stand, and obtaining a position and a direction of each photo capture point, to build a tracking map that uses a global coordinate system; (S3) generating 3D models on the mobile device or a remote server based on an image used for 3D modeling at each photo capture point; and (S4) placing the individual 3D models of all photo capture points in the global three-dimensional coordinate system based on the position and the direction obtained in S2, and connecting the individual 3D models of multiple photo capture points to generate an overall 3D model that includes multiple photo capture points.

Abstract: The present disclosure discloses a tripod for 3D modeling and a method for determining camera capture parameters, including the height and the direction of the camera lens. The tripod includes a telescopic rod, a mobile phone holder, a mounting support, and a floor stand. The telescopic rod is formed by multiple sections of nested hollow round rods, and the round rods can be extended and locked. The mobile phone holder is attached to the telescopic rod through a mobile phone holder install base. The mounting support is set on the top of the telescopic rod. The floor stand is set at the bottom of the telescopic rod. The telescopic rod is vertically set on a plane through the floor stand. There are three sets of the floor stand brackets that are evenly set around the telescopic rod. According to the present disclosure, contrasting colors are used at the bottom of the tripod where it touches the floor to help recognize these points.

Abstract: A method for reconstructing a three-dimensional space scene based on photographing is disclosed, comprising the following steps: S1, importing photos of all spaces, and making the photos correspond to a three-dimensional space according to directions and viewing angles during capture, so that a viewing direction of each pixel, when viewed from the camera position of the three-dimensional space, is in line with that during capture; S2, regarding a room as a set of multiple planes, determining a first plane, and then determining all the planes one by one according to relationships and intersections between the planes; S3, marking a spatial structure of the room by a marking system and obtaining dimension information; and S4, establishing a three-dimensional space model of the room by point coordinate information collected in the step S3.

Abstract: The present invention provides a above ground pool, comprising a flexible pool body. The flexible pool body comprises: a polygonal bottom sheet that comprises a plurality of edge portions; and a plurality of side sheets, each side sheet comprising a pool sidewall portion and a pool bottom portion, and each of the pool sidewall portions and each of the pool bottom portions being in the shape of an isosceles trapezoid. Each of pool sidewall portion comprises a first upper-base portion, a first lower-base portion and a first middle portion defined between the first upper-base portion and the first lower-base portion, and each of the pool bottom portion comprises a second upper-base portion, a second lower-base portion and a second middle portion defined between the second upper-base portion and the second lower-base portion. The first lower-base portion and the second lower-base portion coincide to define a junction of the pool sidewall portion and pool bottom portion.

Abstract: The present disclosure discloses a photography-based 3D modeling system and method, and an automatic 3D modeling apparatus and method, including: (S1) attaching a mobile device and a camera to the same camera stand; (S2) obtaining multiple images used for positioning from the camera or the mobile device during movement of the stand, and obtaining a position and a direction of each photo capture point, to build a tracking map that uses a global coordinate system; (S3) generating 3D models on the mobile device or a remote server based on an image used for 3D modeling at each photo capture point; and (S4) placing the individual 3D models of all photo capture points in the global three-dimensional coordinate system based on the position and the direction obtained in S2, and connecting the individual 3D models of multiple photo capture points to generate an overall 3D model that includes multiple photo capture points.

Abstract: The present invention provides a above ground pool, comprising a flexible pool body. The flexible pool body comprises: a polygonal bottom sheet that comprises a plurality of edge portions; and a plurality of side sheets, each side sheet comprising a pool sidewall portion and a pool bottom portion, and each of the pool sidewall portions and each of the pool bottom portions being in the shape of an isosceles trapezoid. Each of pool sidewall portion comprises a first upper-base portion, a first lower-base portion and a first middle portion defined between the first upper-base portion and the first lower-base portion, and each of the pool bottom portion comprises a second upper-base portion, a second lower-base portion and a second middle portion defined between the second upper-base portion and the second lower-base portion. The first lower-base portion and the second lower-base portion coincide to define a junction of the pool sidewall portion and pool bottom portion.

Abstract: The present invention provides a above ground pool, comprising a flexible pool body. The flexible pool body comprises: a polygonal bottom sheet that comprises a plurality of edge portions; and a plurality of side sheets, each side sheet comprising a pool sidewall portion and a pool bottom portion, and each of the pool sidewall portions and each of the pool bottom portions being in the shape of an isosceles trapezoid. Each of pool sidewall portion comprises a first upper-base portion, a first lower-base portion and a first middle portion defined between the first upper-base portion and the first lower-base portion, and each of the pool bottom portion comprises a second upper-base portion, a second lower-base portion and a second middle portion defined between the second upper-base portion and the second lower-base portion. The first lower-base portion and the second lower-base portion coincide to define a junction of the pool sidewall portion and pool bottom portion.

Abstract: A method for reconstructing a three-dimensional space scene based on photographing is disclosed, comprising the following steps: S1, importing photos of all spaces, and making the photos correspond to a three-dimensional space according to directions and viewing angles during capture, so that a viewing direction of each pixel, when viewed from the camera position of the three-dimensional space, is in line with that during capture; S2, regarding a room as a set of multiple planes, determining a first plane, and then determining all the planes one by one according to relationships and intersections between the planes; S3, marking a spatial structure of the room by a marking system and obtaining dimension information; and S4, establishing a three-dimensional space model of the room by point coordinate information collected in the step S3.

Abstract: The present invention provides a above ground pool, comprising a flexible pool body. The flexible pool body comprises: a polygonal bottom sheet that comprises a plurality of edge portions; and a plurality of side sheets, each side sheet comprising a pool sidewall portion and a pool bottom portion, and each of the pool sidewall portions and each of the pool bottom portions being in the shape of an isosceles trapezoid. Each of pool sidewall portion comprises a first upper-base portion, a first lower-base portion and a first middle portion defined between the first upper-base portion and the first lower-base portion, and each of the pool bottom portion comprises a second upper-base portion, a second lower-base portion and a second middle portion defined between the second upper-base portion and the second lower-base portion. The first lower-base portion and the second lower-base portion coincide to define a junction of the pool sidewall portion and pool bottom portion.

Abstract: A computer-implemented green product management system and method are proposed. The system comprises: a database, a restricted-substance management module and a carbon footprint module. The database is configured to store data required by the restricted-substance management module and the carbon footprint module. The restricted-substance management module comprises: a detection module, configured to detect restricted-substance containing condition of a raw material and all contacted auxiliary consumptive materials in a production process of a product, and a determination module, configured to determine, according to a restricted-substance related predetermined criterion, and based on a detection result of the detection module and data in the database, whether the product conforms to the restricted-substance related predetermined criterion.

Abstract: A method, apparatus, and software are disclosed for delivering customized content to clients with diverse content needs, such as clients from diverse geographical areas an language backgrounds. Customizable content is separated from the underlying code, which is used as a template for inserting localized content into a basic document framework as represented by the template. Both electronic mail and Web community customization techniques are disclosed.

Abstract: A method, apparatus, and software are disclosed for delivering customized content to clients with diverse content needs, such as clients from diverse geographical areas an language backgrounds. Customizable content is separated from the underlying code, which is used as a template for inserting localized content into a basic document framework as represented by the template. Both electronic mail and Web community customization techniques are disclosed.

Abstract: A system, an apparatus and a method for human health evaluation utilizing the TMT mapping technology is disclosed. The method comprises scanning body areas of a patient utilizing an infrared camera, detecting abnormalities in the body of the patient, analyzing abnormalities of the patient against information stored in a database, and reporting results to the patient in a pre-determined format. The method provides an earlier discovery of disease by mapping and analyzing abnormal temperatures changes in the body, which can help prevent the disease from progressing at an early stage.