Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
IMAGE FEATURE VALUE OUTPUT DEVICE, IMAGE RECOGNITION DEVICE, IMAGE FEATURE VALUE OUTPUT PROGRAM, AND IMAGE RECOGNITION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/143277
Kind Code:
A1
Abstract:
The present invention provides a more robust image recognition scheme. An image processing device 8 converts an image that is to undergo image recognition to a high-resolution image 11, a medium-resolution image 12, and a low-resolution image 13. The image processing device 8 sets a pixel 5 of interest of the high-resolution image 11, and counts the co-occurrence in a gradient direction with offset pixels 1a-1d, the co-occurrence in the gradient direction with pixels 2a-2d in the medium-resolution image 12, and the co-occurrence in the gradient direction with pixels 3a-3d in the low-resolution image 13 to a co-occurrence matrix 15. The image processing device 8 creates such a co-occurrence matrix 15 for each pixel combination and for each resolution level. The image processing device 8 performs the above-described process on each of the pixels of the high-resolution image 11, and creates a co-occurrence histogram in which the elements of a plurality of co-occurrence matrices 15 completed as a result of the process are arranged in a row. The image processing device 8 furthermore normalizes the co-occurrence histogram and extracts, as a feature quantity of the image, a vector quantity having as a component a frequency resulting from the normalization.

Inventors:
YAMADA HIDEO (JP)
KUNO KAZUHIRO (JP)
SHIBATA MASATOSHI (JP)
ENOKIDA SHUICHI (JP)
TAMUKOH HAKARU (JP)
Application Number:
PCT/JP2018/003224
Publication Date:
August 09, 2018
Filing Date:
January 31, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
EQUOS RES CO LTD (JP)
KYUSHU INST TECH (JP)
International Classes:
G06T7/00; G06V10/56
Foreign References:
JP2009301104A2009-12-24
JP2015184944A2015-10-22
Other References:
IWATA, SOHEI ET AL.: "Pedestrian detection based on co-occurrence of gradient directions extracted with different filter sizes , Digest Collection of the 21st Symposium on Sensing via Image Information", SSII2015 THE 21ST SYMPOSIUM ON SENSING VIA IMAGE INFORMATION, June 2015 (2015-06-01), pages IS3-21-1 - IS3-21-7, XP009515614
IWATA, SOHEI ET AL.: "Object detection based on multiple resolution CoHOG", THE JOURNAL OF THE INSTITUTE OF IMAGE ELECTRONICS ENGINEERS OF JAPAN : VISUAL COMPUTING , DEVICES & COMMUNICATIONS [ CD-ROM, vol. 45, no. 1, 30 January 2016 (2016-01-30), pages 42 - 52, XP009515610, ISSN: 2186-716X
See also references of EP 3579183A4
Attorney, Agent or Firm:
NAKANO Hitoshi et al. (JP)
Download PDF: