Imaging systems and methods for user input detection

摘要

An imaging system may be provided that includes a camera module, a transparent or translucent surface, and processing circuitry that is configured to perform character recognition operations based on images of the translucent surface that have been captured using the camera module. The camera module may include an image sensor having an array of image pixels and one or more lenses that focus light from the translucent surface onto the array of image pixels. The processing circuitry may be configured to recognize gestures from one or more users on the translucent surface. The processing circuitry may be configured to extract user input data from captured images of an object seen through the translucent surface by extracting gesture point locations from the captured images, storing coordinate data associated with the extracted gesture point locations, and comparing the stored coordinate data with template data that corresponds to a plurality of known characters.

主权项

1. An imaging system, comprising:
an image sensor; a surface that is at least partially translucent; a lens that focuses light from the surface onto the image sensor; and processing circuitry configured to operate the image sensor to capture images of an object through the surface and to extract user input data from the captured images of the object, wherein the processing circuitry comprises memory, and wherein the processing circuitry is configured to extract the user input data from the captured images of the object by extracting gesture point locations from the captured images, to store coordinate data associated with the extracted gesture point locations using the memory, to rotate the stored coordinate data, to scale distances between the coordinate data, and to compare the scaled and rotated coordinate data with template data associated with a plurality of characters.