Patent ID: 11907283
Assignee: ALIBABA GROUP HOLDING LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method implemented by a computing device, the method comprising:
executing a corresponding window query input to determine a target pixel resolution corresponding to a query window according to a raster data access request;
calculating a sampling level according to the target pixel resolution and a stored pixel resolution of a raster object, and determining whether the sampling level is greater than a threshold; and
accessing raster data corresponding to the query window according to a column-level index if the sampling level is greater than the threshold, the column-level index being an index generated by down-sampling according to raster data of the raster object in a column, wherein before executing the corresponding window query input to determine the target pixel resolution corresponding to the query window according to the raster data access request, the method further comprises performing a splicing operation on pixel matrices of a root node of a row-level index of the raster object, performing a down-sampling operation on an obtained splicing result matrix, and generating the column-level index according to a down-sampling result.