Abstract: Example aspects include techniques for performing vectorized delete operations in a distributed database system including clustering multiple files stored in the distributed database system, and generating, for each of the multiple files and based on a deletion signal, a delta array including multiple bits representing the data items in the file and indicating, based on bit value, the target data items to be deleted from the file. Generating, for each of the multiple files, the delta array can include reading at least one second file shard of multiple second file shards before performing a join operation on at least one first file shard of multiple first file shards is completed.

Abstract: In a representative aspect, a method for processing pictures includes segmenting a picture into one or multiple picture segments, determining that a first block of a picture segment covers at least one region that is outside a border of the picture segment, wherein a size of the first block is M×N pixels, selecting a second block of size K×L pixels and where (K?M and L<N) or (K<M and L?N) and the second block falls entirely within the picture segment, and processing, using a partition tree, the border of the picture segment, wherein the partition tree is based on the size of the second block, wherein the processing includes splitting the second block into two or three sub-blocks without an indication on the splitting.

Abstract: An image display method includes displaying, by a terminal, a first image on a display at a first screen refresh rate, where an output frame rate of the first image is a first frame rate, and displaying, by the terminal, a second image on the display after detecting that a preset condition is met. A noise parameter is superimposed on a part of the second image, the part on which the noise parameter is superimposed is displayed at a second screen refresh rate, and an output frame rate of the part is a second frame rate. The second image includes a plurality of frames of noise-added sub-images. The second frame rate is higher than the first frame rate, and the second screen refresh rate is higher than the first screen refresh rate.

Abstract: Improved video compression and video streaming systems and methods are disclosed for environments where camera motion is common, such as cameras incorporated into head-mounted displays. This is accomplished by combining a 3D representation of the shape of the user's environment (walls, floor, ceiling, furniture, etc.), image data, and data representative of changes in the location and orientation (pose) of the camera between successive image frames, thereby reducing data bandwidth needed to send streaming video in the presence of camera motion.

Abstract: In one embodiment, an apparatus comprises a storage device and a processor. The storage device stores a plurality of images captured by a camera. The processor: accesses visual data associated with an image captured by the camera; determines a tile size parameter for partitioning the visual data into a plurality of tiles; partitions the visual data into the plurality of tiles based on the tile size parameter, wherein the plurality of tiles corresponds to a plurality of regions within the image; compresses the plurality of tiles into a plurality of compressed tiles, wherein each tile is compressed independently; generates a tile-based representation of the image, wherein the tile-based representation comprises an array of the plurality of compressed tiles; and stores the tile-based representation of the image on the storage device.

Abstract: Data of each plane capable of obtaining a high-quality output image is generated. An image processing apparatus for quantizing input image data having gradation of an m value (m is a natural number) into output image data having gradation of an n value (n is a natural number smaller than m) includes a quantization unit configured to quantize input image data having gradation of an m value in a target pixel into output image data having gradation of an n value, and a plane separation unit configured to determine that the quantization value quantized by the quantization unit is to be assigned to the target pixel of which plane out of planes of two types or more, wherein the plane separation unit determines that the quantization value is to be assigned to the target pixel of which plane, based on distance information of the target pixel indicating distances, to the target pixel, from pixels on which a recording material is recorded in the each plane.

Abstract: A method for encoding pictures within a groups of pictures using prediction, where a first reference picture from a group of pictures and a second reference pictures from the subsequent group of pictures are used in predicting pictures in the group of pictures associated with the first reference picture. A plurality of anchor pictures in the group of pictures associated with the first reference picture may be predicted using both the first and second reference pictures to ensure a smooth transition between different groups of pictures within a video frame.