Reconstruction of original touch image from differential touch image
First Claim
1. A method for reconstructing an original touch image from a differential touch image, comprising:
- capturing the differential touch image at a touch sensitive device;
capturing common mode data at the device;
combining the captured differential touch image data and the common mode data;
performing a column alignment to align columns of the differential touch image to each other based on the combined data; and
performing a baseline alignment to align the column-aligned differential touch image with a baseline value.
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Abstract
Reconstruction of an original touch image from a differential touch image is disclosed. Reconstruction can include aligning columns of the differential touch image relative to each other and aligning the image to a baseline DC value. The column and baseline alignment can be based on the differential image data indicative of no touch or hover, because such data can more clearly show the amount of alignment needed to reconstruct the original image. The reconstruction can be performed using the differential image data alone. The reconstruction can also be performed using the differential image data and common mode data indicative of the missing image column average.
336 Citations
20 Claims
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1. A method for reconstructing an original touch image from a differential touch image, comprising:
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capturing the differential touch image at a touch sensitive device; capturing common mode data at the device; combining the captured differential touch image data and the common mode data; performing a column alignment to align columns of the differential touch image to each other based on the combined data; and performing a baseline alignment to align the column-aligned differential touch image with a baseline value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A touch sensitive device comprising:
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a touch panel capable of sensing a proximate object; scan logic couplable to the touch panel and capable of performing a scan of the touch panel so as to capture a first touch image; and a processor capable of reconstructing a second touch image from the first touch image, the reconstructing including; capturing the differential touch image at a touch sensitive device; capturing common mode data at the device; combining the captured differential touch image data and the common mode data; performing a column alignment to align columns of the differential touch image to each other based on the combined data; and performing a baseline alignment to align the column-aligned differential touch image with a baseline value. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for reconstructing an original touch image from a differential touch image, comprising:
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capturing the differential touch image at a touch sensitive device; capturing common mode data at the device; performing a column alignment to align columns of the differential touch image to each other based on the captured common mode data; and performing a baseline alignment to align the column-aligned differential touch image with a baseline value. - View Dependent Claims (18, 19, 20)
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Specification