HYBRID CAPACITIVE IMAGE DETERMINATION AND USE
In a method of determining a hybrid capacitive image a transcapacitive image, a first absolute capacitive profile, and a second absolute capacitive profile are acquired with a plurality of sensor electrodes. An absolute capacitive image is determined as a function of the first absolute capacitive profile and the second absolute capacitive profile. A hybrid capacitive image is determined as a function of the absolute capacitive image and the transcapacitive image.
1 . A method of determining a hybrid capacitive image comprising:
acquiring a transcapacitive image, a first absolute capacitive profile, and a second absolute capacitive profile with a plurality of sensor electrodes;
determining an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile; and
determining a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image.
2 . The method as recited in claim 1 , further comprising:
downwardly adjusting originally determined capacitive pixel values of said hybrid capacitive image through use of a root function.
3 . The method as recited in claim 1 , wherein said determining an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile comprises:
weighting at least a portion of one of said first absolute capacitive profile and said second absolute capacitive profile.
4 . The method as recited in claim 1 , wherein said determining said absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile comprises:
multiplying said first absolute capacitive profile and said second absolute capacitive profile.
5 . The method as recited in claim 1 , wherein said determining said absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile comprises:
determining a linear combination of said first absolute capacitive profile and said second absolute capacitive profile.
6 . The method as recited in claim 1 , wherein said determining a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image comprises:
weighting at least a portion of one of said absolute capacitive image and said transcapacitive image.
7 . The method as recited in claim 1 , wherein said determining a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image comprises:
multiplying said absolute capacitive image and said transcapacitive image.
8 . The method as recited in claim 1 , wherein said determining a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image comprises:
determining a linear combination of said absolute capacitive image and said transcapacitive image.
9 . A processing system for a capacitive sensing input device, said processing system comprising:
a sensor module configured to acquire transcapacitive resulting signals by transmitting with a first one of a plurality of sensor electrodes and receiving with a second one of the plurality of sensor electrodes and acquire absolute capacitive resulting signals by modulating and receiving with the second one of the plurality of sensor electrodes; and
a determination module configured to:
determine a transcapacitive image from said transcapacitive resulting signals;
determine a first absolute capacitive profile and a second absolute capacitive profile from said absolute capacitive resulting signals;
determine an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile; and
determine a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image.
10 . The processing system of claim 9 , wherein said determination module is further configured to determine positional information for at least one input object based upon said hybrid capacitive image.
11 . The processing system of claim 10 , wherein said positional information for at least one input object comprises:
positional information for at least one gloved human digit.
12 . The processing system of claim 9 , wherein said determination module is further configured to perform an operation to downwardly adjust pixel values of said hybrid capacitive image.
13 . The processing system of claim 9 , wherein said determination module is further configured to:
weight at least a portion of one of said first absolute capacitive profile and said second absolute capacitive profile.
14 . The processing system of claim 9 , wherein said determination module is configured to:
multiply said first absolute capacitive profile and said second absolute capacitive profile to determine said absolute capacitive image.
15 . The processing system of claim 9 , wherein said determination module is configured to:
determine a linear combination of said first absolute capacitive profile and said second absolute capacitive profile to determine said absolute capacitive image.
16 . The processing system of claim 9 , wherein said determination module is configured to:
weight at least a portion of one of said absolute capacitive image and said transcapacitive image.
17 . The processing system of claim 9 , wherein said determination module is configured to:
multiply said absolute capacitive image and said transcapacitive image to determine said hybrid capacitive image.
18 . The processing system of claim 9 , wherein said determination module is configured to:
determine said hybrid capacitive image as a linear combination of said absolute capacitive image and said transcapacitive image.
19 . The processing system of claim 9 , wherein said determination module is configured to:
scale said hybrid capacitive image.
20 . A capacitive sensing input device, said capacitive sensing input device comprising:
a plurality of sensor electrodes; and
a processing system coupled with said plurality of sensor electrodes, said processing system configured to:
acquire transcapacitive resulting signals by transmitting with a first one of a plurality of sensor electrodes and receiving with a second one of the plurality of sensor electrodes;
acquire absolute capacitive resulting signals by modulating and receiving with the second one of the plurality of sensor electrodes;
determine a transcapacitive image from said transcapacitive resulting signals;
determine a first absolute capacitive profile and a second absolute capacitive profile from said absolute capacitive resulting signals;
determine an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile; and
determine a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image.
21 . The capacitive sensing input device of claim 20 , wherein said processing system is further configured to determine positional information for at least one input object based upon said hybrid capacitive image.
22 . The capacitive sensing input device of claim 21 , wherein said positional information for at least one input object comprises:
positional information for at least one gloved human digit.
23 . The capacitive sensing input device of claim 20 , wherein said processing system is further configured to perform an operation to downwardly adjust pixel values of said hybrid capacitive image.
24 . The capacitive sensing input device of claim 20 , wherein said hybrid capacitive image is constructed for a sub-portion of a sensing region of said capacitive sensing input device, wherein said sub-portion is less than the entirety of said sensing region.
25 . The capacitive sensing input device of claim 24 , wherein said sub-portion is selected based on said first absolute capacitive profile and said second absolute capacitive profile.
26 . A processing system for a capacitive sensing input device, said processing system comprising:
a sensor module configured to acquire transcapacitive resulting signals by transmitting with a first one of a plurality of sensor electrodes and receiving with a second one of the plurality of sensor electrodes and acquire absolute capacitive resulting signals by modulating and receiving with the second one of the plurality of sensor electrodes; and
a determination module configured to:
determine a transcapacitive image from said transcapacitive resulting signals;
determine a first absolute capacitive profile and a second absolute capacitive profile from said absolute capacitive resulting signals; and
determine a hybrid capacitive image on a pixel-by-pixel basis as a function of said first absolute capacitive profile, said second absolute capacitive profile, and said transcapacitive image.
27 . The processing system of claim 26 , wherein said determination module is further configured to determine positional information for at least one input object based upon said hybrid capacitive image.
28 . The processing system of claim 26 , wherein said positional information for at least one input object comprises:
positional information for at least one gloved human digit.
29 . The processing system of claim 26 , wherein said determination module is further configured to perform an operation to downwardly adjust pixel values of said hybrid capacitive image.