公开(公告)号：US09317898B2

公开(公告)日：2016-04-19

申请号：US14156327

申请日：2014-01-15

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Danilo Pietro Pau ,  Arcangelo Ranieri Bruna ,  Ettore Napoli ,  Giorgio Lopez

IPC: G06K9/36 ,  G06T3/40 ,  G06K9/52 ,  G06F17/30 ,  G06K9/46 ,  G06K9/00

CPC classification number: G06T3/4092 ,  G06F17/30247 ,  G06K9/00986 ,  G06K9/4671 ,  G06K9/527 ,  G06T3/4084

Abstract: An embodiment of a method for computing pyramids of input images (I) in a transformed domain, e.g., for search and retrieval purposes, includes:—arranging input images in blocks to produce input image blocks,—subjecting the input image blocks to block processing including: transform into a transformed domain, subjecting the image blocks transformed into a transformed domain to filtering, subjecting the image blocks transformed into a transformed domain and filtered to inverse transform implementing an inverse transform with respect to the previous transform into a transformed domain, thus producing a set of processed blocks. The set of processed blocks, which is recomposeable to an image pyramid, may be used, e.g., in detecting extrema points in images in the pyramid, extracting a patch of given size around the extrema points detected, and processing the patch to obtain local descriptors such as SIFT descriptors of a feature.

Abstract translation: 用于计算变换域中的输入图像（I）的棱锥的方法的实施例，例如用于搜索和检索目的，包括： - 以块为单位布置输入图像以产生输入图像块， - 输入输入图像块以阻止处理 包括：变换为变换域，对经变换的域进行滤波，对变换后的图像块进行变换后进行逆变换，将前一变换的逆变换实现为变换域， 产生一组加工块。 可以使用可重构为图像金字塔的处理块的集合，例如，在检测金字塔中的图像中的极值点时，在检测到的极值点处提取给定大小的块，并且处理该补丁以获得局部描述符 例如功能的SIFT描述符。