US 11,954,893 B2
Negative sampling algorithm for enhanced image classification
Oron Nir, Hertzeliya (IL); Maria Zontak, Seattle, WA (US); Tucker Cunningham Burns, Issaquah, WA (US); Apar Singhal, Seattle, WA (US); Lei Zhang, Bellevue, WA (US); Irit Ofer, Kfar-Saba (IL); Avner Levi, Kiryat Ono (IL); Haim Sabo, Petah Tikva (IL); Ika Bar-Menachem, Herzliya (IL); Eylon Ami, Givataayim (IL); Ella Ben Tov, Tel-Aviv (IL); and Anika Zaman, Redmond, WA (US)
Assigned to MICROSOFT TECHNOLOGY LICENSING, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jun. 17, 2022, as Appl. No. 17/843,270.
Application 17/843,270 is a continuation of application No. 16/831,105, filed on Mar. 26, 2020, granted, now 11,366,989.
Claims priority of provisional application 62/889,314, filed on Aug. 20, 2019.
Prior Publication US 2022/0318574 A1, Oct. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06V 10/00 (2022.01); G06F 18/214 (2023.01); G06F 18/24 (2023.01); G06V 10/25 (2022.01); G06V 10/774 (2022.01); G06V 20/40 (2022.01)
CPC G06V 10/25 (2022.01) [G06F 18/2155 (2023.01); G06F 18/24 (2023.01); G06V 10/774 (2022.01); G06V 20/41 (2022.01); G06V 20/46 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
identifying a bounding box around a character in an image;
identifying multiple sub-frames within a frame around the bounding box; and
for at least a sub-frame of the sub-frames:
determining whether the sub-frame satisfies a plurality of criteria, wherein the plurality of criteria comprises a size threshold and whether the sub-frame is empty;
in response to determining that the sub-frame satisfies the plurality of criteria, designating the sub-frame a negative example of one or more characters in the image; and
in response to determining that the sub-frame is empty but does not satisfy the size threshold, discarding the sub-frame without designating the sub-frame as a negative example.