Abstract: A device includes a memory configured to store instructions and a processor configured to execute the instructions to obtain image data of a region of interest included in an image frame. The processor may also be configured to compare the image data of the region of interest with image data of a background to detect a change in the region of interest. The processor may further be configured to detect the object in image frame based on the detected change.

Abstract: Methods and apparatus for determining the motion of a movable object are disclosed. The methods may include, in a view of the environment outside the movable object, identifying a first region of interest (ROI) corresponding to a static portion of the environment. The methods may also include, in the view of the environment, identifying a second region of interest (ROI) corresponding to an active portion of the environment. The methods may also include receiving first and second image data respectively representing the first and second ROIs. The methods may also include analyzing the first image data over time. The methods may also include analyzing the second image data over time. The methods may further include determining whether the movable object is in motion based on the analyses of the first and second image data.

Abstract: Traffic-counting methods and apparatus are disclosed. The methods may include, in a view of traffic comprising moving objects, identifying first and second regions of interest (ROIs). The methods may also include obtaining first and second image data respectively representing the first and second ROIs. The methods may also include analyzing the first and second image data over time. The methods may further include, based on the analyses of the first and second image data, counting the moving objects and determining moving directions of the moving objects.

Abstract: Methods and apparatus for automatically synthesizing images are disclosed. The methods may include receiving a plurality of input frames with a common background. The methods may also include determining a number of the input frames. The methods may also include selecting, based on the number, a method to detect foregrounds of the input frames. The methods may further include using the selected method to generate an output frame comprising a combination of a plurality of the foregrounds.

Abstract: Provided herein are disulfide polymers, methods of their preparation, compositions, and methods of using the same. For example, provided herein are polymers having at least one repeating unit according to Formula (I):or Formula (II): and nanoparticles and compositions including the same. The polymers and compositions provided herein may be used, for example, in the encapsulation of drugs for a slow release drug administration in the treatment or imaging of diseases.

Abstract: A method for presenting a preview of a video includes receiving a first version of the video. The first version of the video has a first resolution. The method also includes analyzing the first version of the video and identifying a first preview frame from the first version of the video based on the analysis of the first version of the video. The method further includes obtaining information relating to the identified first preview frame and receiving a second version of the video. The second version of the video has a second resolution, which is greater than the first resolution. The method also includes extracting, from the second version of the video, a second preview frame according to the information relating to the first preview frame.

Abstract: A method for presenting a preview of a video includes receiving a first version of the video. The first version of the video has a first resolution. The method also includes analyzing the first version of the video and identifying a first preview frame from the first version of the video based on the analysis of the first version of the video. The method further includes obtaining information relating to the identified first preview frame and receiving a second version of the video. The second version of the video has a second resolution, which is greater than the first resolution. The method also includes extracting, from the second version of the video, a second preview frame according to the information relating to the first preview frame.

Abstract: A method for presenting a preview of a video includes receiving a plurality of video preview frames and information relating to a special event detected in the video. The plurality of video preview frames are extracted from the video. The special event is identified from an analysis of the video, and includes at least one of an object, a moving object, or a sound detected in the video. The method further includes displaying at least one of the received plurality of video preview frames, and displaying an indicator indicating the special event.

Abstract: A device for previewing a video includes a memory device configured to store instructions, and one or more processors configured to execute the instructions to receive a video captured by a camera and analyze the video. The one or more processors are also configured to detect a special event from the analysis of the video. The special event includes at least one of an object, a moving object, or a sound detected in the video. The one or more processors are further configured to extract, from the video, at least one of a video preview frame or audio segment corresponding to the special event, and generate a preview video including the at least one of the video preview frame or audio segment corresponding to the special event.

Abstract: A system for detecting a motion event based on images. The system acquires a first image and a comparison image, and generates a first edge image and a comparison edge image based on the first image and the comparison image. The system also determines the difference between the first edge image and the comparison edge image. The system indicates a motion event if the difference between the first edge image and the comparison edge image meets or exceeds a threshold.

Abstract: Cationic polymers are provided for delivering anionic active agents, preferably in the form or nanoparticles and other nanostructures. The polymer can be a polycation homopolymer or a copolymer containing a polycation block. The polycations and polycation containing polymers can contain dicarboxylic acid ester units and units of (a-amino acid)-?, ?-alkylene diester units. The nanoparticles can contain high loadings of anionic active agents, with sustained release of the active agents. Methods of making the polycations and polycation containing polymers are provided. Methods of making the nanoparticles and formulating them for administration to an individual in need thereof are also provided.

Abstract: Disclosed are systems and devices for facilitating audiovisual communication. According to embodiments, there may be provided a communication device including or otherwise functionally associated with a video camera to acquire visual information from a scene and to convert the visual information into a video stream. A video processing circuit may (a) receive the video stream, (b) extract user related features from the video stream; and (c) detect and characterize one or more user actions. A controller to receive the video processing circuit output and responsive to an indication of one or more detected events within the video stream to trigger a communication session between said communication device and an addressee device, wherein different addressee devices may be associated with different detected actions.

Abstract: This present invention disclosed a tumor-targeting gene-virus ZD55-IL-24, which is a recombinant Ad5 with a deletion of E1B 55K da gene and carries the anti-tumor gene IL-24. This present invention also disclosed its construction method and its application in cancer gene-therapy. The tumor-targeting gene-virus ZD55-IL-24 of this invention can be used in the therapy of many kinds of tumors, so it can be used in developing the new effective tumor therapy medicine.