发明名称 |
Systems and methods for triggering an out of focus alert |
摘要 |
<p>In order to trigger an out of focus alert when the focus level of a video frame meets a focus criteria, a method is performed including the operations of: receiving a video frame, partitioning the video frame into a plurality of blocks, calculating an array of discrete cosign transformation (DCT) coefficients for at least one of the plurality of blocks using a DCT, classifying each of the at least one of the plurality of blocks based on the array of DCT coefficients for that block, calculating a focus level of the video frame from the block classifications, and triggering an out of focus alert if the focus level meets a focus criteria.
</p> |
申请公布号 |
EP2026566(A3) |
申请公布日期 |
2009.03.25 |
申请号 |
EP20080251874 |
申请日期 |
2008.05.29 |
申请人 |
VERINT SYSTEMS INC. |
发明人 |
MAK, FUK SANG;CHUNG, HING YIP;LUO, TAO;YIU, WAI SHING;LEE, CHI KIN;TSANG, SHIU HANG |
分类号 |
H04N7/18 |
主分类号 |
H04N7/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|