In some implementations, a device may receive, from a camera of a source device, video data depicting a physical environment. The device may detect a target indicator associated with a target zone of the physical environment. The device may determine, based on the target indicator, a zone configuration of the target zone relative to the target indicator. The device may generate, based on a position of the source device, an initial masking content that is associated with a boundary of the target zone that is defined by the zone configuration using a spatial mapping model based on the video data and the target indicator. The device may generate a final masking content using chroma keying based on the initial masking content. The device may generate display data associated with the final masking content and the video data. The device may provide the display data to a destination device.

A graphics processing system for operation with a data store, comprising: one or more processing units for processing tasks; a check unit operable to form a signature which is characteristic of an output from processing a task on a processing unit; and a fault detection unit operable to compare signatures formed at the check unit; wherein the graphics processing system is operable to process each task first and second times at the one or more processing units so as to, respectively, generate first and second processed outputs, the graphics processing system being configured to: write out the first processed output to the data store; read back the first processed output from the data store and form at the check unit a first signature which is characteristic of the first processed output as read back from the data store; form at the check unit a second signature which is characteristic of the second processed output; compare the first and second signatures at the fault detection unit; and raise a fault signal if the first and second signatures do not match.

Example embodiments of systems and methods for data transmission between a contactless card and a receiving application are provided. The transmitting device may include a processor, memory, and communication interface. A receiving application may include instructions for execution on a receiving device having a processor, a memory, a communication interface configured to create a communication field for data communication with the transmitting device, and one or more sensors. Upon movement of the transmitting device, the receiving application is configured to receive, via one or more sensors, feedback information associated with the transmitting device, display one or more instructions regarding the position of the transmitting device relative to the receiving device until the transmitting device enters the communication field. Upon entry into the communication field, the transmitting device is configured to transmit data to the receiving device.

Methods of detecting scan avoidance events during decode sessions are disclosed herein. An example method includes decoding, during a timeout period at one or more processors of the symbology scanner, a first indicia in a first image captured during the timeout period to determine a first indicia payload; conveying, during the timeout period at the one or more processors, the first indicia payload to a point-of-sale (POS) system for affecting a transaction; detecting, during the timeout period at the one or more processors, a second indicia in the first image or in a subsequent image captured during the timeout period; and in response to determining that the second indicia is the same as the first indicia and is decodable, determining a potential scan avoidance attempt and generating a scan avoidance alarm signal.

Methods of detecting scan avoidance events during decode sessions are disclosed herein. An example method includes decoding, during a timeout period at one or more processors of the symbology scanner, a first indicia in a first image captured during the timeout period to determine a first indicia payload; conveying, during the timeout period at the one or more processors, the first indicia payload to a point-of-sale (POS) system for affecting a transaction; detecting, during the timeout period at the one or more processors, a second indicia in the first image or in a subsequent image captured during the timeout period; and in response to determining that the second indicia is the same as the first indicia and is decodable, determining a potential scan avoidance attempt and generating a scan avoidance alarm signal.

Methods of detecting scan avoidance events when items are passed through a field of view (FOV) of a scanner are disclosed herein. An example method, during a decode session, receiving, at one or more processors of the symbology reader, an image of an object; during a timeout period, detecting, at the one or more processors, an indicia in the image of the object, the indicia having a decodable payload; during the timeout period, attempting to decode the indicia to identify the decodable payload, at the one or more processors; and after the timeout period expires, when at least one portion but less than all portions of the indicia is decodable, determining a potential scan avoidance attempt and generating a scan avoidance alarm signal.

Methods of detecting scan avoidance events when items are passed through a field of view (FOV) of a scanner are disclosed herein. An example method, during a decode session, receiving, at one or more processors of the symbology reader, an image of an object; during a timeout period, detecting, at the one or more processors, an indicia in the image of the object, the indicia having a decodable payload; during the timeout period, attempting to decode the indicia to identify the decodable payload, at the one or more processors; and after the timeout period expires, when at least one portion but less than all portions of the indicia is decodable, determining a potential scan avoidance attempt and generating a scan avoidance alarm signal.

A method of generating control data for a printing system includes receiving image data comprising an image to be printed by the printing system, determining a presence of a control mark in the image data, and generating control data for the printing system based on the control mark, the control data including at least an indication of the presence of the control mark.

This application provides a polar code transmission method and apparatus. The method includes: transforming a to-be-processed bit sequence at two or more different granularities, where each specific manner at a first granularity is used to implicitly indicate one value in one level of time sequence information, and each specific manner at a second granularity is used to implicitly indicate one value in another level of time sequence information; and sending the transformed (processed) bit sequence, so that different encoded bit sequences can be obtained, and more versions of time sequence information can be implemented, thereby meeting a requirement of transmission in a plurality of levels of time sequences.

A control unit determines as a sheet center actual position a center position of a print sheet, and adjusts a center position of the image to be printed on the basis of a difference from the sheet center actual position. Further, the control unit prints a main scale image along a primary scanning direction on one face of a print sheet for a test chart, prints a vernier scale image along the primary scanning direction on the other face of the print sheet, determines a deviation between a reference center position of the print engine and a reference center position of the line sensor on the basis of a scale mark of the main scale image that agrees with a scale mark of the vernier scale image, and moves a center position of the image to be printed so as to reduce the determined deviation.