Pixart Imaging Incorporated

Teng Wei Hsu

Chih Hsin Lin

Cheng Nan Tsai

Tzung Min Su

Yu Chia Lin

Yuan Yu Peng

Yu Chao Lin

Chih-Hsin Lin

Tzung-Min Su

Cheng-Nan Tsai

Yu-Chia Lin

Hui Hsuan Chen

Chun Yi Lu

Hung Ching Lai

Chuan Ching Lin

Yaun-Yu Peng

Chuan-Ching Lin

Tsung Min Su

There is provided an optical touch system including a touch surface, a plurality of image sensors and a plurality or compensation light sources, wherein each of the image sensors is adjacent to one of the compensation light sources. When one of the image sensors is capturing an image frame, the compensation light source not adjacent to and within a field of view of the image sensor which is capturing the image frame irradiates so as to compensate a brightness distribution of the image frame.

Optical touch system with brightness compensation and brightness compensation method thereof

The present invention provides an optical touch system configured to determine an object region according to a brightness information acquired by a brightness sensing unit and to identify a block information of objects within the object region according to an image information acquired by an image sensing unit. The present invention further provides an objection detection method for an optical touch system.

Optical touch system and object detection method therefor

An image processing method for an optical touch system includes the steps of obtaining an image and generating a light distribution curve pattern from the image, selecting a target signal of the light distribution curve pattern in accordance with light intensity information of the light distribution curve pattern, determining at least one rising slope and at least one falling slope of the target signal, and selecting the target signal as an object signal when the absolute values of the at least one rising slope and at least one falling slope are greater than a threshold.

Image processing method for optical touch system

The present invention provides an image sensing module including an image sensing device and a calculation device. The image sensing device includes a plurality of pixels for acquiring an operation image containing an object image. The calculation device stores a look-up table regarding a temperature related parameter and a position deviation of the object image at each pixel associated with the temperature related parameter, and selects a deformation error from the look-up table according to the temperature related parameter corresponding to the operation image so as to correct a current position of the object image in the operation image.

Image sensing module adapted to compensate temperature variation

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Hsin-Chu, Taiwan

Teng Wei Hsu