JP2004213648A5 - - Google Patents
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- JP2004213648A5 JP2004213648A5 JP2003422254A JP2003422254A JP2004213648A5 JP 2004213648 A5 JP2004213648 A5 JP 2004213648A5 JP 2003422254 A JP2003422254 A JP 2003422254A JP 2003422254 A JP2003422254 A JP 2003422254A JP 2004213648 A5 JP2004213648 A5 JP 2004213648A5
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従って、フレーム間差分処理ステップ110によって、差分が多く存在する位置(x1,y1)が検出される。
なお、本実施例では、式(2)、(3)で表される通り、x1もしくはy1をx0−d<x1<x0+d、y0−d<y1<y0+dと変化させた場合に、x1<x<x1+dx、y1<y<y1+dyにおいてhx(x)、hy(y)の累積値が最も大きくなるx1、y1を求めている。これに代わり、x0−d<x1<x0+d、y0−d<y1<y0+dと変化させる過程で式(2)のΣhx(x1+i)、i=0〜tx−1、式(3)のΣhy(y1+j)、j=0〜ty−1が所定のしきい値を超えた場合に式(2)、(3)の計算を中止し、その時のx1もしくはy1を侵入物体位置の修正位置としても良い。この場合、所定のしきい値とは、例えば累積値の最大値255×(dy+2d)(y軸に対しては255×(dx+2d))の30%の値を設定する。この値によって検出される範囲は、差分の最大累積値の30%以上の差分を含む部分となり、これによって式(2)、(3)の計算量を減らすことができる。
Therefore, the inter-frame difference processing step 110 detects the position (x1, y1) where many differences exist.
In the present embodiment, x1 <x when x1 or y1 is changed to x0−d <x1 <x0 + d or y0−d <y1 <y0 + d as expressed by the equations (2) and (3). In the case of <x1 + dx, y1 <y <y1 + dy, x1 and y1 at which the cumulative value of hx (x) and hy (y) is the largest are determined. Instead of this, in the process of changing x0−d <x1 <x0 + d and y0−d <y1 <y0 + d, Σhx (x1 + i) of formula (2), i = 0 to tx−1, Σhy (y1 + j of formula (3) And j = 0 to ty-1 exceed a predetermined threshold value, the calculation of equations (2) and (3) may be stopped, and x1 or y1 at that time may be used as the correction position of the intruding object position . In this case, the predetermined threshold value is set to, for example, 30% of the maximum value of the accumulated value 255 × (dy + 2d) (255 × (dx + 2d) for the y axis). The range detected by this value is a portion including 30% or more of the maximum cumulative value of the differences, which can reduce the amount of calculation of equations (2) and (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003422254A JP3973623B2 (en) | 2002-12-19 | 2003-12-19 | Object tracking method and object tracking device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002367852 | 2002-12-19 | ||
JP2003422254A JP3973623B2 (en) | 2002-12-19 | 2003-12-19 | Object tracking method and object tracking device |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004213648A JP2004213648A (en) | 2004-07-29 |
JP2004213648A5 true JP2004213648A5 (en) | 2005-05-26 |
JP3973623B2 JP3973623B2 (en) | 2007-09-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003422254A Expired - Fee Related JP3973623B2 (en) | 2002-12-19 | 2003-12-19 | Object tracking method and object tracking device |
Country Status (1)
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JP (1) | JP3973623B2 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006267221A (en) * | 2005-03-22 | 2006-10-05 | Fujinon Corp | Auto focus system |
JP2006267220A (en) * | 2005-03-22 | 2006-10-05 | Fujinon Corp | Auto focus system |
JP2006258943A (en) * | 2005-03-15 | 2006-09-28 | Fujinon Corp | Autofocus system |
JP5578816B2 (en) * | 2009-09-02 | 2014-08-27 | キヤノン株式会社 | Image processing device |
JP5789937B2 (en) * | 2010-09-14 | 2015-10-07 | 株式会社ニコン | Image tracking device and imaging device |
JP5461597B2 (en) * | 2012-01-30 | 2014-04-02 | 日本電信電話株式会社 | Moving object tracking method and computer program |
WO2014061123A1 (en) * | 2012-10-17 | 2014-04-24 | 富士通株式会社 | Image processing device, image processing program and image processing method |
JP6212400B2 (en) * | 2014-01-29 | 2017-10-11 | セコム株式会社 | Object detection sensor and program |
JP5990229B2 (en) * | 2014-08-19 | 2016-09-07 | 株式会社岩崎電機製作所 | Position change detection device |
US9721350B2 (en) * | 2015-06-26 | 2017-08-01 | Getalert Ltd. | Methods circuits devices systems and associated computer executable code for video feed processing |
CN112184750A (en) * | 2019-06-13 | 2021-01-05 | 北京四维图新科技股份有限公司 | Object tracking method and device based on video image |
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2003
- 2003-12-19 JP JP2003422254A patent/JP3973623B2/en not_active Expired - Fee Related
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