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公开(公告)号：US10891717B2
公开(公告)日：2021-01-12
申请号：US16178200
申请日：2018-11-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Mihir Narendra Mody , Shashank Dabral , Jesse Gregory Villarreal, Jr. , William Wallace , Niraj Nandan
Abstract: A method for filtering noise for imaging includes receiving an image frame having position and range data. A filter size divides the frame into filter windows for processing each of the filter windows. For the first pixel, a space to the center pixel and a range difference between this pixel and the center pixel is determined and used for choosing a selected weight from weights in a 2D weight LUT including weighting for space and range difference, a filtered range value is calculated by applying the selected 2D weight to the pixel, and the range, filtered range value and selected 2D weight are summed. The determining, choosing, calculating and summing are repeated for at least the second pixel. A total sum of contributions from the first and second pixel are divided by the sum of selected 2D weights to generate a final filtered range value for the center pixel.
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公开(公告)号：US10121231B2
公开(公告)日：2018-11-06
申请号：US15183459
申请日：2016-06-15
Applicant: Texas Instruments Incorporated
Inventor： Mihir Narendra Mody , Shashank Dabral , Jesse Gregory Villarreal, Jr. , William Wallace , Niraj Nandan
Abstract: A method for filtering noise for imaging includes receiving an image frame having position and range data. A filter size divides the frame into filter windows for processing each of the filter windows. For the first pixel, a space to the center pixel and a range difference between this pixel and the center pixel is determined and used for choosing a selected weight from weights in a 2D weight LUT including weighting for space and range difference, a filtered range value is calculated by applying the selected 2D weight to the pixel, and the range, filtered range value and selected 2D weight are summed. The determining, choosing, calculating and summing are repeated for at least the second pixel. A total sum of contributions from the first and second pixel are divided by the sum of selected 2D weights to generate a final filtered range value for the center pixel.
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公开(公告)号：US20190130534A1
公开(公告)日：2019-05-02
申请号：US16178200
申请日：2018-11-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Mihir Narendra Mody , Shashank Dabral , Jesse Gregory Villarreal , William Wallace , Niraj Nandan
Abstract: A method for filtering noise for imaging includes receiving an image frame having position and range data. A filter size divides the frame into filter windows for processing each of the filter windows. For the first pixel, a space to the center pixel and a range difference between this pixel and the center pixel is determined and used for choosing a selected weight from weights in a 2D weight LUT including weighting for space and range difference, a filtered range value is calculated by applying the selected 2D weight to the pixel, and the range, filtered range value and selected 2D weight are summed. The determining, choosing, calculating and summing are repeated for at least the second pixel. A total sum of contributions from the first and second pixel are divided by the sum of selected 2D weights to generate a final filtered range value for the center pixel.
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