Abstract: Provided are an automatic video editing method and a portable terminal, the method comprising: obtaining a video to be edited; extracting key frames of the video to be edited; inputting the key frames to a pre-trained scene classification method and a pre-trained target detection method, and respectively obtaining scene type markers and target object markers of the key frames; selecting multiple video segments from the video to be edited which satisfy preset editing criteria; respectively calculating average scores of the multiple video segments by means of a pre-trained image quality scoring method; respectively obtaining the video segment having the highest average score of each shot type for splicing.

Abstract: The present invention is applicable to the technical field of panoramic videos. Provided are a panoramic video clip method, apparatus and device, and a storage medium. The method comprises acquiring a panoramic video photographed by means of a panoramic camera, and recording an advancing-direction viewing angle of the panoramic camera during moving photographing; carrying out a frame extraction operation on the acquired panoramic video to obtain a corresponding panoramic video frame, carrying out significant target detection on the panoramic video frame, tracking a detected significant target by using a preset target tracking algorithm, and acquiring a viewing angle at which the tracked significant target is located; and clipping the panoramic video according to the advancing-direction viewing angle and the viewing angle at which the significant target is located, so as to generate a target video corresponding to the panoramic video.

Abstract: An emulsion gel embedding a fat-soluble vitamin and a pulsed electric field based production method therefor. The production method comprises: dissolving octenyl succinate starch ester in water, heating in a water bath, stirring to complete gelatinization and dissolution, and cooling to room temperature; adding edible oil dissolved with a fat-soluble vitamin to obtain a mixed liquid; shearing and homogenizing the obtained mixed liquid by using a high-speed shearing machine and a high-pressure homogenizer to obtain an emulsion; and adding the emulsion and natural starch to a methyl cellulose solution, performing pulsed electric field treatment after well mixing, heating in a water bath, performing degasification and cooling to obtain an emulsion gel. The pulsed electric field promotes interaction between methyl cellulose and starch molecules, has a higher elastic modulus, and is easier to form a network structure that is more conducive to embedding the fat-soluble vitamin.

Abstract: The present invention relates to the field of panoramic cameras, and provides a method for tracking a target in a panoramic video, and a panoramic camera. The method is used to track a target in a panoramic video on the basis of a multi-scale correlation filter, and employs automatic electronic pan-tilt-zoom technology. The present invention provides more robust tracking, faster processing speeds, a greater range of application in different tracking scenarios, and can be used to ensure that a tracked target is always at the center of the screen.

Abstract: Provided are an automatic video editing method and a portable terminal, the method comprising: obtaining a video to be edited; extracting key frames of the video to be edited; inputting the key frames to a pre-trained scene classification method and a pre-trained target detection method, and respectively obtaining scene type markers and target object markers of the key frames; selecting multiple video segments from the video to be edited which satisfy preset editing criteria; respectively calculating average scores of the multiple video segments by means of a pre-trained image quality scoring method; respectively obtaining the video segment having the highest average score of each shot type for splicing.

Abstract: The present invention relates to the field of panoramic cameras, and provides a method for tracking a target in a panoramic video, and a panoramic camera. The method is used to track a target in a panoramic video on the basis of a multi-scale correlation filter, and employs automatic electronic pan-tilt-zoom technology. The present invention provides more robust tracking, faster processing speeds, a greater range of application in different tracking scenarios, and can be used to ensure that a tracked target is always at the center of the screen.

Abstract: The present invention is applicable to the field of videos. Provided are an anti-shake method and apparatus for a panoramic video, and a portable terminal. The method comprises: acquiring, in real time, a current state timestamp, an accelerometer numerical value and an angular velocity numerical value of a gyroscope in a portable terminal; performing estimation using extended Kalman filtering combined with the accelerometer numerical value and the angular velocity numerical value to obtain an amount of rotation of the portable terminal to a world coordinate system; synchronizing the timestamp of the gyroscope with a timestamp of a panoramic video frame; performing quaternion interpolation on the state of the gyroscope to acquire a rotation matrix corresponding to the panoramic video frame; and rotating a panoramic image according to the current rotation matrix to generate a stable video frame.

Abstract: Disclosed in the present invention are an image purple fringe eliminating system, method, a computer-readable storage medium, and a photographing device. The system traverses an image, calculates a hue of a pixel, counts a ratio of purple hue to adjacent purple hue pixels in the image, and calculates a dynamic purple fringe detection threshold; creates a mask with the same size as the image acquired by an image acquisition module, and detects the pixels that fall into a purple fringe area; corrects the detected pixel falling into the purple fringe area, correcting both a red channel intensity value and a blue channel intensity value of the pixels within the purple fringe region using a green channel intensity value. The invention can automatically correct the purple fringe of the image, improve the image shooting quality and the user experience.

Abstract: The present application is applicable in the field of videos. Provided are a method and system for panoramic video stabilization, and a portable terminal. The method comprises: acquiring in real time the timestamp of a current state, an accelerometer count value, and an angular velocity value of a portable terminal; estimating the rotation vector of the current state by utilizing an Extended Kalman Filtering combined with the accelerometer count value and the angular velocity value; calculating a current rotation matrix via the Rodrigues' rotation formula on the basis of the rotation vector of the current state; and rotating a panoramic image on the basis of the current rotation matrix and producing a stabilized video frame. The present invention allows the stabilization of a jittering video frame and alleviates VR motion sickness.

Abstract: The present invention is applicable to the field of videos. Provided are an anti-shake method and apparatus for a panoramic video, and a portable terminal The method comprises: acquiring, in real time, a current state timestamp, an accelerometer numerical value and an angular velocity numerical value of a gyroscope in a portable terminal; performing estimation using extended Kalman filtering combined with the accelerometer numerical value and the angular velocity numerical value to obtain an amount of rotation of the portable terminal to a world coordinate system; synchronizing the timestamp of the gyroscope with a timestamp of a panoramic video frame; performing quaternion interpolation on the state of the gyroscope to acquire a rotation matrix corresponding to the panoramic video frame; and rotating a panoramic image according to the current rotation matrix to generate a stable video frame.

Abstract: Disclosed in the present invention are an image purple fringe eliminating system, method, a computer-readable storage medium, and a photographing device. The system traverses an image, calculates a hue of a pixel, counts a ratio of purple hue to adjacent purple hue pixels in the image, and calculates a dynamic purple fringe detection threshold; creates a mask with the same size as the image acquired by an image acquisition module, and detects the pixels that fall into a purple fringe area; corrects the detected pixel falling into the purple fringe area, correcting both a red channel intensity value and a blue channel intensity value of the pixels within the purple fringe region using a green channel intensity value. The invention can automatically correct the purple fringe of the image, improve the image shooting quality and the user experience.

Abstract: The present application is applicable in the field of videos. Provided are a method and system for panoramic video stabilization, and a portable terminal. The method comprises: acquiring in real time the timestamp of a current state, an accelerometer count value, and an angular velocity value of a portable terminal; estimating the rotation vector of the current state by utilizing an Extended Kalman Filtering combined with the accelerometer count value and the angular velocity value; calculating a current rotation matrix via the Rodrigues' rotation formula on the basis of the rotation vector of the current state; and rotating a panoramic image on the basis of the current rotation matrix and producing a stabilized video frame. The present invention allows the stabilization of a jittering video frame and alleviates VR motion sickness.