Abstract: The present application relates to a method and apparatus for selecting a cover of a video, a computer device and a storage medium. The method comprises: acquiring video data for which a cover is to be selected, the video data comprising a plurality of video frames; performing quality quantization processing on each video frame, and obtaining quality quantization data of each video frame, the quality quantization data comprising at least one among an imaging quality quantization value and a composition quality quantization value; and selecting a target video frame from the video data according to the quality quantization data of each video frame, and generating a cover of the video data on the basis of the target video frame. By using the described method, a means of selecting a cover is no longer lacks variety, and the flexibility selecting a cover is improved.

Abstract: Methods and apparatuses are provided for processing video data. An exemplary method includes: decompressing a compressed frame to generate a key frame representing a face; generating, for the key frame, a first set of parameters associated with a 3-dimensional (3D) face representation of the face; reconstructing, for each of one or more inter frames, a second set of parameters associated with a 3D face representation of the face according to compressed inter-predicted residuals of the second set of parameters; and generating a video comprising the face based on the key frame, the first set of parameters, and the second set of parameters.

Abstract: Methods and apparatuses are provided for compressing video data based on keypoint features. An exemplary video compression method includes: receiving a video sequence; encoding one or more pictures of the video sequence; and generating a bitstream; wherein the encoding includes: representing a first picture by a first set of keypoints and a second set of keypoints, the second set comprising less keypoints than the first set; and compressing the video sequence based on the first set and second set of keypoints.

Abstract: Apparatus, systems, and methods for tuning the structure, conductivity, and/or wettability of laser induced graphene for a variety of functions including but not limited to multiplexed open microfluidic environmental biosensing and energy storage devices. Aspects of this invention introduce a one-step, mask-free process to create, pattern, and tune laser-induced graphene (LIG) with a ubiquitous CO2 laser or other laser. The laser parameters are adjusted to create LIG with different electrical conductivity, surface morphology, and surface wettability without the need for post chemical modification. This can be done with a single lasing. By optionally introducing a second (or third, fourth, or more) lasing(s), the LIG characteristics can be changed in just the same one step of using the laser scribing without other machines or sub-systems. One example is a second lasing with the same laser sub-system at low laser power, wherein the wettability of the LIG can be significantly altered.