Abstract: An electronic system includes a device having a screen and an optical touch device. The optical touch device monitors the activity of an object on the screen of the device. When the object performs an operation in a first region of the screen, the optical touch device generates first data; and when the object performs an operation outside the first region, the optical touch device generates second data, wherein the first data and the second data are of different data types.

Abstract: An image-capturing device configured for an optical pointing apparatus includes a plurality of image-sensing units arranged adjacently. The plurality of image-sensing units are configured to sense images of a surface and generate sensing signals that are used for evaluating the velocity of the optical pointing apparatus. The image-capturing device is configured to use different image-sensing units arranged differently to sense the surface according to the velocity of the optical pointing apparatus. When the optical pointing apparatus moves at a first velocity, the image-capturing device uses the image-sensing units configured to occupy a smaller area to sense the surface. When the optical pointing apparatus moves at a second velocity, the image-capturing device uses the image-sensing units configured to occupy a larger area to sense the surface. The first velocity is lower than the second velocity.

Abstract: There is provided an optical touch system including at least one lighting unit, at least one image sensing module and a processing unit. The image sensing module is configured to capture light of a pointer and the lighting unit to generate a two-dimensional image and to convert entire of the two-dimensional image to a one-dimensional feature. The processing unit positions the pointer according to the one-dimensional feature.

Abstract: 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.

Abstract: 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.

Abstract: An optical lens is configured in front of an image-capturing lens of an image-capturing device. A light-emitting unit of the image-capturing device emits a light beam. The optical lens includes a pair of peripheral compensation portions and a central diverging portion. Each peripheral compensation portion has a first convex surface and a first concave surface arranged opposite to the first convex surface. The central diverging portion is arranged between the peripheral compensation portions, and has a second concave surface and an oppositely arranged light incident surface. The second concave surface is arranged between the first convex surfaces. The light incident surface is arranged between the first concave surfaces. The optical axis of the light beam sequentially aligns with the light incident surface and the second concave surface. The light rays of the light beam pass through the first concave surface and the first convex surface in sequence.

Abstract: An exposure mechanism of an optical touch system, which includes a plurality of image sensors and a plurality of active light sources each irradiating corresponding to the associated image sensor, includes: capturing image frames using the image sensors with a sampling cycle to allow each of the image sensors to capture a bright image, wherein the sampling cycle includes a plurality of working modes and in each of the working modes at least one of the image sensors captures the bright image in a sampling interval; simultaneously capturing a dark image using all the image sensors in a denoising sampling interval; and calculating a differential image between the bright image and the dark image captured by each image sensor.

Abstract: An optical touch screen system includes a sensing device and a processing unit. The sensing device includes first and second sensors, each generating an image. The images include the image information of a plurality of objects. The processing unit generates a plurality of candidate coordinates according to the image information and selects a portion of the candidate coordinates as output coordinates according to an optical feature of the image information.

Abstract: 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.

Abstract: The present invention provides a displacement estimation method including the steps of: acquiring an image frame and determining a quality threshold according to a sampling parameter; calculating a quality parameter of the image frame; and comparing the quality parameter and the quality threshold to determine whether to post-process the image frame. In the displacement estimation method of the present invention, the quality threshold can be adjusted dynamically so as to reduce the possibility of outputting error displacement. The present invention further provides a displacement estimation device.

Abstract: An exposure mechanism of an optical touch system, which includes a plurality of image sensors and a plurality of active light sources each irradiating corresponding to the associated image sensor, includes: capturing image frames using the image sensors with a sampling cycle to allow each of the image sensors to capture a bright image, wherein the sampling cycle includes a plurality of working modes and in each of the working modes at least one of the image sensors captures the bright image in a sampling interval; simultaneously capturing a dark image using all the image sensors in a denoising sampling interval; and calculating a differential image between the bright image and the dark image captured by each image sensor.

Abstract: A locating method applied to an optical touch device is disclosed. The optical touch device includes at least one image detecting component for detecting an imaging position of an object and generating a touch position of the object on a plane according to the imaging position. The at least one image detecting component includes a plurality of pixels. The locating method includes dividing the pixels into a first group and a second group along a first direction, analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness point formed by the object is simultaneously detected by the first group and the second group, and calculating the imaging position of the darkness point inside the image detecting component according to the dimension ratios.

Abstract: An optical touch system includes an image sensor for detecting at least one object and a processor coupled to the image sensor. The processor is configured to determine the number of pixel clusters created by the at least one object on an image generated from the image sensor and to generate gesture information when the number of pixel clusters is greater than a predetermined pixel cluster number.

Abstract: An image sensor includes a plurality of light detecting elements. The plurality of light detecting elements are arranged in a plurality of rows and a plurality of columns, wherein a flat field picture generated by the image sensor, the intensity standard deviation of pixels in each pixel column is greater than that of pixels in any pixel row, or the intensity standard deviation of pixels in each pixel row is greater than that of pixels of any pixel column.

Abstract: An optical touch control method includes steps of: providing a bright background from at least one edge of a touch surface in a first period; providing illumination light to the touch surface in a second period; capturing a first image of an indicator object blocking a portion of the bright background in the first period; and capturing a second image of the indicator object reflecting the illumination light in the second period. An optical touch system is also provided.

Abstract: An optical touch panel system includes: a reflective element disposed on a first side of the touch control area; two lighting elements respectively disposed on a second side and a third side of the touch control area , wherein the second side and the third side are adjacent to each other, and the third side is opposite the first side; a first light projection apparatus including a mirror and a light generator, disposed on the first side and at a location adjacent to a fourth side of the touch control area; an image sensor capturing a first picture and a second picture respectively when the light generator is inactivated and activated; and a processor calculating a coordinate of the object according to geometrical information of an projected object image and a projected mirror image of the object in the first picture and the second picture.

Abstract: 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.

Abstract: The present disclosure provides an object detection method including: pre-storing a lookup table of touch reference values, wherein the lookup table of touch reference values records a plurality of touch reference values associated with image positions of a plurality of calibration object images formed in calibration images captured by a first image sensor; capturing a first image, wherein the first image has at least an object image corresponding to a pointer formed therein; generating a first light distribution curve according to the first image; defining a first detection region in the first light distribution curve; obtaining at least one touch reference value associated with the object image using the lookup table of touch reference values; comparing at least one brightness value within the first detection region of the first light distribution curve with the at least one touch reference value obtained.

Abstract: An optical touch screen system includes a touch screen, an image-sensing device, and a processing device. The image-sensing device generates a plurality of light-shielding information of an object at a plurality of time points. The processing device coupled to the image-sensing device includes a computing unit calculating a projected size difference value according to the plurality of light-shielding information, wherein the projected size difference value is a difference value between the projected sizes of the object on the touch screen at two different time points.

Abstract: There is provided a processing method of an object image for an optical touch system includes the steps of: capturing, using a first image sensor, a first image frame containing a first object image; capturing, using a second image sensor, a second image frame containing a second object image; generating a polygon image according to the first image frame and the second image frame; and determining a short axis of the polygon image and at least one object information accordingly.