Invention Grant
- Patent Title: Motion and focus blur removal from pattern images
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Application No.: US14537535Application Date: 2014-11-10
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Publication No.: US09607369B2Publication Date: 2017-03-28
- Inventor: Ram Sivaraman
- Applicant: KLA-Tencor Corporation
- Applicant Address: US CA Milpitas
- Assignee: KLA-Tencor Corporation
- Current Assignee: KLA-Tencor Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Suiter Swantz pc llo
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06T7/00 ; G06T5/00 ; G06T5/20

Abstract:
A moving wafer imaging system processes wafer images to remove motion and focus blur by performing a blind deconvolution to determine an approximate point spread function. The approximate point spread function, estimated image noise and a Gaussian point spread function are used to compute a weighted point spread function. The weighted point spread function is used to filter out motion focus blur. Noise is then removed with a low-pass filter.
Public/Granted literature
- US20150131893A1 Motion and Focus Blur Removal from Pattern Images Public/Granted day:2015-05-14
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