US 12,380,526 B2
Method of selecting accident image based on speed profile analysis
Sang Mook Lim, Seoul (KR); and Jin Hyuck Kim, Seoul (KR)
Assigned to AIMATICS CO., LTD., Seoul (KR)
Appl. No. 17/636,696
Filed by AIMATICS CO., LTD., Seoul (KR)
PCT Filed Dec. 29, 2021, PCT No. PCT/KR2021/020114
§ 371(c)(1), (2) Date Feb. 18, 2022,
PCT Pub. No. WO2022/146009, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 10-2020-0187559 (KR), filed on Dec. 30, 2020.
Prior Publication US 2023/0222617 A1, Jul. 13, 2023
Int. Cl. G06T 1/00 (2006.01); G07C 5/02 (2006.01)
CPC G06T 1/0007 (2013.01) [G07C 5/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of selecting an accident image based on speed profile analysis by detecting, by a blackbox installed in a vehicle, an impact applied to the vehicle, storing an image before or after impact detection timing (TO) as an impact detection image, and then selecting whether the impact detection image is an accident image, the method comprising steps of:
(a) detecting an average deceleration ratio of the vehicle in a section from first timing (T1) to second timing (T2), wherein the first timing (T1) is an earlier timing in time than the impact detection timing (TO), and the second timing (T2) is a later timing in time that the impact detection timing (TO), and
determining whether i) the average deceleration ratio in the section is less than a predetermined safe deceleration ratio (SDR), ii) the average deceleration ratio in the section is the SDR or more and an accident deceleration ratio (ADR) or less, wherein the ADR has a greater value than that of the SDR, or iii) the average deceleration ratio in the section is greater than the ADR;
(b) determining the impact detection image as an image having a low accident possibility, when i) the average deceleration ratio is less than the SDR or ii) the average deceleration ratio is the SDR or more and the ADR or less;
(c) determining the impact detection image as an accident image when iii) the average deceleration ratio is greater than the ADR;
(d) when the average deceleration ratio is greater than the ADR:
(d-1) dividing the section from the first timing (T1) to the second timing (T2) into a plurality of subsections such that each of the subsections has the same time interval, wherein the subsections include a first subsection which overlaps the impact detection timing (TO), and a second subsection which is a subsection earlier in time than the first subsection, and a third subsection which is a subsection later in time than the first subsection;
(d-2) selecting a sudden deceleration subsection which has the greatest deceleration ratio among the subsections, by comparing deceleration ratios of each of the subsections
(d-3) determining the impact detection image as a first-grade accident image indicative of a highest accident possibility when the sudden deceleration subsection is the second subsection;
(d-4) determining the impact detection image as a second-grade accident image indicative of a lower accident possibility than the first-grade accident image when the sudden deceleration subsection is the first subsection; and
(d-5) determining the impact detection image as a third-grade accident image indicative of a lower accident possibility than the second-grade accident image when the sudden deceleration subsection is the third subsection.