Picture fingerprint comparison method and device based on large integer type, equipment and medium

Abstract

The invention provides a picture fingerprint comparison method and a device based on a large integer type, equipment and a medium, and the method comprises the steps: setting a large integer type with a user-defined byte length to store a picture id of M bytes and a picture fingerprint of N bytes, and forming storage data of at least M + N bytes; arranging the storage data according to a sequence from small to large, and sequentially storing the storage data into corresponding files with different ranges and sizes; obtaining to-be-compared storage data stored in the same way, and positioning a target file matched with the range size of the to-be-compared storage data according to the high X bits of the N bytes of the fingerprint of the to-be-compared storage data; if target storage data with the same high X bits are stored in the file, counting the M-bit picture id corresponding to the target storage data to be hit by the fingerprint for one time. According to the method, a large integer type with an adjustable length is set, so that storage and comparison are facilitated, and the efficiency of picture storage and picture fingerprint comparison is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of picture processing, in particular to a method, device, device and medium for comparing picture fingerprints based on large integer types. Background technique [0002] At present, most software programming systems or platforms define the byte size for any type. For example, the common int integer type is usually specified as 4 bytes (Byte) and 32 bits (Bit), or specified as 8 bytes (Byte) 64 bits (Bit). [0003] And usually a picture information just contains the picture id information such as 20 bytes, or the picture fingerprint information that comprises picture layout and shape feature of 11 bytes or 12 bytes, and is subject to the restriction such as integer type int byte, stores or compares For a picture with an ID combined with fingerprints, multiple arrays are often required, which results in many objects for storage and comparison, and the process is very cumbersome and inefficient. Con...

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Problems solved by technology

[0003] And usually a picture information just includes the picture id information such as 20 bytes, or the picture fingerprint information that comprises picture layout and shape feature of 11 bytes or 12 bytes, and is subject to the restriction such as integer type int byte, stores or compares For a picture with an id combined with fingerprints, multiple arrays are often required, which results in many objects for storage and comparison, and the process is very cumbersome and inefficient

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