2results about How to "Simplify data volume" patented technology

This disclosure relates to the field of image processing technology, and provides an image deduplication method and apparatus for equipment security inspection. The method includes: acquiring a group of images to be deduplicated, the group comprising multiple pairs of images to be deduplicated; extracting spatial feature vectors for each pair of images in the group of images to be deduplicated based on a preset Siamese network model; calculating a similarity value between the spatial feature vectors of each pair of images in the group of images to be deduplicated; extracting color data feature vectors of images in each pair of images to be deduplicated based on the similarity value and a preset image threshold; and determining whether duplicate image pairs exist in the group of images to be deduplicated based on the color data feature vectors. This disclosure can quickly and in real-time find and filter out duplicate images taken at the same angle in the same scene, saving time and effort, increasing work efficiency, and improving the efficiency of subsequent equipment security inspection.

The invention relates to an irradiation plan optimization method based on novel sparse sampling, belongs to the technical field of radiation irradiation dose optimization, and solves the problems that invalid voxel data volume cannot be effectively simplified, the processing data volume is large and the result is not accurate enough in the prior art. Receiving an initial irradiation plan and generating a full dose deposition matrix corresponding to each radiation field; constructing a gradient image based on the full dose deposition matrix; performing dual-condition voxel screening on the constructed gradient image to obtain a final sampling voxel set, and constructing a sparse dose deposition matrix; and performing irradiation plan optimization and dose normalization on the sparse dose deposition matrix to obtain an optimized irradiation plan.