公开(公告)号：US20230177656A1

公开(公告)日：2023-06-08

申请号：US17984387

申请日：2022-11-10

Applicant: Melexis Technologies NV

Inventor： Wouter REUSEN ,  Luc BUYDENS

IPC: G06T5/00 ,  G06T5/20 ,  G06T7/168

CPC classification number: G06T5/003 ,  G06T5/20 ,  G06T7/168 ,  G06T2207/10048 ,  G06T2207/20021 ,  G06T2207/20056 ,  G06T2207/20201

Abstract: A method of generating a de-interlacing filter comprises: analysing a pixel array comprising an interlacing pattern of pixels. The interlacing pattern of pixels comprises first and second pluralities of pixels configured to be read during a first measurement subframe and a second measurement subframe, respectively. An n-state representation of the interlacing pattern of pixels is generated and distinguishes between the first plurality of pixels and the second plurality of pixels. The n-state representation of the interlacing pattern is translated to a spatial frequency domain, thereby generating a spatial frequency domain representation of the n-state representation of the interlacing pattern. A DC signal component is then removed from the spatial frequency domain representation of the n-state representation of the interlacing pattern, thereby generating a DC-less spatial frequency domain representation. A kernel filter is then selected and configured to blur before convolving the DC-less spatial frequency representation with the selected kernel filter.

公开(公告)号：US20220405949A1

公开(公告)日：2022-12-22

申请号：US17837448

申请日：2022-06-10

Applicant: Melexis Technologies NV

Inventor： Wouter REUSEN ,  Luc BUYDENS ,  Adrian HILL

IPC: G06T7/33

Abstract: A method of digitally processing a plurality of pixels of an image captured using an array of sensing pixels of an optical sensor device. The method comprises identifying a measurement pixel of the plurality of pixels corresponding to a measurement point on a target to be measured. The method then comprises identifying a number of pixels of the plurality of pixels neighbouring the measurement pixel, the number of pixels having a number of intensity values, respectively. A curve is then fitted to the number of pixels and the number of respective intensity values. An estimated intensity value is then determined from the curve in respect of the measurement pixel, thereby simulating a predetermined field of view in respect of the measurement pixel narrower than an actual field of view of the measurement pixel.

公开(公告)号：US20220256079A1

公开(公告)日：2022-08-11

申请号：US17667646

申请日：2022-02-09

Applicant: Melexis Technologies NV

Inventor： Wouter REUSEN ,  Adrian HILL ,  Luc BUYDENS

IPC: H04N5/232 ,  H04N5/345

Abstract: A method of digitally processing an image comprises: generating an intensity distribution model (170) in respect of at least a portion of the array of sensing pixels (102) of a detector device (100). The array of sensing pixels comprises clusters of pixels. A pixel (140) from the array of sensing pixels is then selected (202) and a first distance and a second distance from the selected pixel to a first neighbouring pixel (142) and a second neighbouring pixel (144), respectively, are determined (402) and the intensity distribution model (170) referenced (406) by the first distance is used to calculate a first weight and a second weight to apply to the first and second neighbouring pixels, respectively. The first distance comprises an intra-cluster distance and the second distance comprises an inter-cluster distance, the intra-cluster distance being different from the inter-cluster distance. The first weight is applied (214) to the first neighbouring pixel (142) and the second weight is applied (214) to the second neighbouring pixel (144).

公开(公告)号：US20220187135A1

公开(公告)日：2022-06-16

申请号：US17512776

申请日：2021-10-28

Applicant: Melexis Technologies NV

Inventor： Jos RENNIES ,  Wouter REUSEN ,  Luc BUYDENS

IPC: G01J5/10 ,  H04N5/33 ,  H04N5/369 ,  H04N5/347

Abstract: A thermal imaging apparatus comprising: a thermal detector device (100) comprising an array of thermal sensing pixels (102) and signal processing circuitry (104) coupled to the detector device (100). The circuitry (104) supports a background identifier (110) and a pixel classifier (112), the background identifier (110) comprising a common intensity identifier (114) and an expected background intensity calculator (116). The background identifier (110) receives pixel measurement data captured by the detector device (100) in respect of pixels of the array (102) and the common intensity identifier (114) identifies a largest number of substantially the same pixel intensity values from the pixel measurement data. The expected background intensity calculator (116) uses the largest number of substantially the same pixel intensity values to generate a model of expected background intensity levels. The pixel classifier (112) uses the model to determine whether an intensity measurement by a pixel (118) of the array (102) corresponds to a background or an object in an image.