Systems and methods for image filtering in sensor devices
First Claim
1. A processing system for an input device, the processing system comprising:
- a sensor module comprising sensor circuitry, the sensor module configured to drive a plurality of transmitter electrodes with transmitter signals;
receive, with a plurality of receiver electrodes, resulting signals comprising effects corresponding to the transmitter signals; and
produce, based on the resulting signals, a first sensor image comprising raw data; and
a filter module, wherein the filter module is configured to produce a transformed sensor image by applying a spatial filter to the raw data in the first sensor image, wherein the spatial filter is a two-axis gradient sweep filter;
a determination module configured to determine at least one of positional information and a validity of a baseline for the input device based on the transformed sensor image.
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Abstract
A processing system for an input device includes a sensor module, a filter module, and a determination module. The sensor module is configured to drive a plurality of transmitter electrodes with transmitter signals; receive, with a plurality of receiver electrodes, resulting signals comprising effects corresponding to the transmitter signals; and produce a first sensor image based on the resulting signals. The filter module is configured to produce a transformed sensor image by applying a spatial filter to the first sensor image. The determination module is configured to positional information and/or the validity of a baseline for the input device based on the transformed sensor image.
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Citations
12 Claims
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1. A processing system for an input device, the processing system comprising:
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a sensor module comprising sensor circuitry, the sensor module configured to drive a plurality of transmitter electrodes with transmitter signals;
receive, with a plurality of receiver electrodes, resulting signals comprising effects corresponding to the transmitter signals; and
produce, based on the resulting signals, a first sensor image comprising raw data; anda filter module, wherein the filter module is configured to produce a transformed sensor image by applying a spatial filter to the raw data in the first sensor image, wherein the spatial filter is a two-axis gradient sweep filter; a determination module configured to determine at least one of positional information and a validity of a baseline for the input device based on the transformed sensor image. - View Dependent Claims (2, 3, 4)
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5. A method for an input device, comprising:
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driving a plurality of transmitter electrodes with transmitter signals; receiving, with a plurality of receiver electrodes, resulting signals comprising effects corresponding to the transmitter signals; producing, based on the resulting signals, a first sensor image comprising raw data; producing a transformed sensor image by applying a spatial filter to the raw data in the first sensor image, wherein the spatial filter is a two-axis gradient sweep filter; and determining at least one of positional information and a validity of a baseline for the input device based on the transformed sensor image. - View Dependent Claims (6, 7, 8)
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9. A sensor device comprising:
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a plurality of transmitter electrodes; a plurality of receiver electrodes; a processing system communicatively coupled to the plurality of transmitter electrodes and the plurality of receiver electrodes, the processing system configured to; drive a plurality of transmitter electrodes with transmitter signals; receive, with a plurality of receiver electrodes, resulting signals comprising effects corresponding to the transmitter signals; produce, based on the resulting signals, a first sensor image comprising raw data; and produce a transformed sensor image by applying a spatial filter to the raw data in the first sensor image, wherein the spatial filter is a two-axis gradient sweep filter; and determine at least one of positional information and a validity of a baseline for the input device based on the transformed sensor image. - View Dependent Claims (10, 11, 12)
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Specification