Abstract: A gesture recognition method includes determining whether an object stays within a plurality of video frames for more than a specific time; determining a finger number corresponding to the object to generate a finger number determination result, and determining whether or not the object moves away from a light sensing unit to generate an object moving-away determination result, when the object stays within the plurality of video frames for more than the specific time; and determining a gesture of a user according to the finger number determination result and the object moving-away determination result.

Abstract: A method for measuring a physiological signal is provided, including the steps of: receiving a video and performing face detection for each image frame thereof; performing photo-plethysmography (PPG) calculation and analysis on first face image for first image frame to obtain first PPG information of first regions and second PPG information of corresponding second regions; determining at least one region-of-interest (ROI) and one noise reference region according to the first PPG information and the second PPG information; generating ROI information and noise reference region information based on the ROI and the noise reference region; and performing the PPG calculation and analysis on the ROI and the noise reference region of the second face image of each subsequent second image frame and generating corresponding third PPG information; and counting the PPG information of all the image frames to calculate a measured value of a physiological signal.

Abstract: A method for detecting multiple touch positions on a touch surface, which is applicable to a touch apparatus having multiple optical sensing modules, where each optical sensing module includes at least two optical sensing devices.

Abstract: An image detection method for determining the postures of a user includes: obtaining a plurality of images of a user; determining whether the user moves; and when the user is determined to be moving, calculating whether the amount of images is greater than a first predetermined value or not, calculating whether or not the amount of images of the user in the region of interest (ROI) is greater than a second predetermined value, and calculating whether or not the amount of images of the user not in the ROI is greater than a third predetermined value, in order to determine the postures of the user.

Abstract: An image detection method for determining the posture of a user includes: obtaining a reference image of the user in a region of interest (ROI); obtaining a test image of user at the ROI; executing a feature matching analysis of the test image which compares the feature parameter of the test image and the feature parameter of the reference image to determine the similarity information of the test image and the reference image; and executing a pixel distribution analysis of the test image to obtain user pixel distribution information; and determining the posture of the user based on the user similarity information and the user pixel distribution information.

Abstract: A drowsiness detection apparatus is provided. The drowsiness detection apparatus: an image capturing unit, an alarm apparatus, and a drowsiness determination circuit. The image capturing unit is configured to repeatedly capture a plurality of facial images of a user. The drowsiness determination circuit is configured to obtain an eye region from a current image of the facial images, calculate a vertical histogram of the eye region, and determine an eye part from the eye region according to the vertical histogram. The drowsiness determination circuit further compares the pixel height of the eye part with a closed-eye pixel threshold to perform closed-eye detection, and performs drowsiness detection on the user according to the results of the closed-eye detection. When the result of the drowsiness detection indicates that the user is drowsy, the drowsiness determination circuit transmits a control signal to the alarm apparatus to sound an alarm.

Abstract: A method for measuring a physiological signal is provided, including the steps of: receiving a video and performing face detection for each image frame thereof; performing photo-plethysmography (PPG) calculation and analysis on first face image for first image frame to obtain first PPG information of first regions and second PPG information of corresponding second regions; determining at least one region-of-interest (ROI) and one noise reference region according to the first PPG information and the second PPG information; generating ROI information and noise reference region information based on the ROI and the noise reference region; and performing the PPG calculation and analysis on the ROI and the noise reference region of the second face image of each subsequent second image frame and generating corresponding third PPG information; and counting the PPG information of all the image frames to calculate a measured value of a physiological signal.

Abstract: An auxiliary identification device for indicator objects and an auxiliary identification and display method therefor are provided. The auxiliary identification device includes a camera module, a controller, and a display. The camera module is configured to obtain a video in a first direction. The controller is coupled to the camera module and is configured to capture and identify multiple indicator objects in the video. Each of the indicator objects includes indication information. The controller sorts the indicator objects to determine a priority display order of the indicator objects, and further generates a display image signal according to the priority display order. The display is coupled to the controller and is configured to sequentially display the indicator objects according to the display image signal.

Abstract: A gesture recognition method includes determining whether an object stays within a plurality of video frames for more than a specific time; determining a finger number corresponding to the object to generate a finger number determination result, and determining whether or not the object moves away from a light sensing unit to generate an object moving-away determination result, when the object stays within the plurality of video frames for more than the specific time; and determining a gesture of a user according to the finger number determination result and the object moving-away determination result.

Abstract: An optical touch system includes two touch devices, two optical sensing devices, and a processing module. When the optical touch system is in use according to an optical touch method, the two touch device are used to touch a touch surface and emit first light and second light with different wavelengths respectively. The two optical sensing devices are disposed at the circumference of the touch surface and individually receive the first light and the second light to generate an optical sensing signal. The processing module receives the two optical sensing signals and determines a touch position on the touch surface for each touch device according to the two optical sensing signals. Therefore, the touching by each touch device is independent, so the optical touch system and the optical touch method can allow touch operations for different purposes to be performed simultaneously.

Abstract: Methods for supplying, ordering, and transacting items based on motion images are proposed. The methods are applicable to a server and include the following steps. A first video stream is received from a first electronic device, and at least one item is identified from the first video stream to generate a frame and a tag associated with each item. An editing operation on a first tag is received from the first electronic device to generate first tag data. The first tag and the first frame are combined into the first video stream to generate a composite video stream. The composite video stream is transmitted to a second electronic device. In response to an ordering operation detected on the first item from the second electronic device, first ordering data is generated according to the first tag data to add the first item into an order list of the second electronic device.

Abstract: An optical touch apparatus configured to sense a touch operation of a touch object is provided. The optical touch apparatus includes a touch operation surface, a plurality of optical sensors and a touch controller. The touch operation surface includes a plurality of reference points. The touch object performs the touch operation on the touch operation surface. The optical sensors are disposed on a side of the touch operation surface and configured to obtain a plurality of images from different angles. The touch controller is electrically connected to the optical sensors and configured to determine a plurality of orientation points according to the images obtained by the optical sensors. The touch controller compares the orientation points to the reference points and determines a touch position of the touch object on the touch operation surface according to a comparison result. Furthermore, a method for determining a touch position is also provided.

Abstract: A hover-control method for multirotor unmanned aerial vehicle (UAV) upcast at any angle to take off is applied to correct at least one tilt angle of the multirotor UAV by dual-feedback schemes. When any of the at least one tilt angle is greater than a corresponding angle limitation, an open feedback scheme is executed to drive a plurality of motors of the multirotor UAV until a predetermined condition is achieved. When all of the at least one tilt angle are not larger than the respective angle limitations, a negative feedback scheme is executed to drive the motors of the multirotor UAV until a hover condition is achieved.

Abstract: An optical touch sensing device and a touch signal determining method thereof are provided. The optical touch sensing device includes a light source module, at least one image capturing element and a processing unit. The light source module disposed on a touch surface provides a detecting light to the touch surface. The image capturing element captures an optical touch data along the touch surface based on the detecting light. The processing unit recognizes the optical touch data according to a recognition threshold to obtain multiple touch signals. When a object spacing between the touch signals is no bigger than a palm spacing, the processing unit compares the covering parameters corresponding to the touch signals to select a largest covering parameter among the covering parameters, and determines whether to ignore the touch signal corresponding to the largest covering parameter according to the largest covering parameter and an area threshold.

Abstract: A touch apparatus and a correction method thereof are provided. Whether to divide a correction block is determined by calculating distortion error quantity of the correction block, so as to make the distortion error quantity of each divided correction block is less than or equal to a preset threshold. A correction parameter set of each correction block is obtained. Accordingly, in an operation procedure, correction for a touch behavior of a user is executed based on the correction parameter set.

Abstract: An optical touch sensing system, an optical touch sensing device, and a touch detection method thereof are provided. The optical touch sensing system includes an optical touch sensing device and a stylus. The optical touch sensing device includes a touch panel, multiple optical sensors, a first light source, and a processor. The touch panel has a touch surface. The first light source generates a first light periodically. The stylus includes a switch module and a second light source. The switch module enables the second light source to generate a second light when the stylus touches the touch surface. The processor determines a position touched by the stylus according to the first light and the second light received by the optical sensors.

Abstract: An optical touch device and a sensing method thereof are provided. The optical touch device includes a plurality of optical sensors and a processing unit. The optical sensors are arranged around a touch plane and are spaced from each other. The two adjacent optical sensors located at one side of the touch plane are defined as one set of an optical sensing module, such that the optical sensors are paired to form multiple sets of the optical sensing modules. The processing unit generates a plurality of touch coordinates data corresponding to the plurality sets of the optical sensing modules according to the optical touch data, and determines whether the touch coordinates data corresponding to each set of the optical sensing modules is in at least one touch-excluded area corresponding to each set of the optical sensing modules, and respectively excludes the touch coordinates data in the touch-excluded area.

Abstract: An optical touch apparatus including two touch panels, two optical sensing modules, and a rail device is provided. Each touch panel has two lateral sides separated from each other and a touch zone located between the two lateral sides. Each optical sensing module is disposed or near one lateral side of one of the touch panels. The rail device is coupled to the two touch panels, such that two touch panels can slide in parallel along a predetermined direction and can be selectively operated in one of a first touching mode and a second touching mode, and the optical touch apparatus can flexibly change its size of touch zone.

Abstract: An optical touch system includes a touch surface, a first light source and a first light-sensing unit. The first light source emits a first light. The first light is reflected at positions on a first section of the touch surface to form a first reference section at the first light-sensing unit. The first light is reflected at positions on a second section of the touch surface to form a second reference section at the first light-sensing unit. The second section is located between the first section and the first light-sensing unit. A touch object reflects the first light between the first section and the second section to produce a first input light region on the first reference section, or reflects the first light between the second section and the first light-sensing unit to produce a second input light region on the second reference section.

Abstract: A method and a system including at least three image capturing devices for generating depth information are proposed. Multiple depth maps associated with a specific scene are obtained, where each of the depth maps corresponds to a different group of the image capturing devices and a different estimated region of the specific scene. For each pixel corresponding to the specific scene, whether the pixel is within a joint overlapping region of its estimated region is determined. If no, the depth information of the pixel is set according to its depth value in the depth map corresponding to a non-joint overlapping region of its estimated region. If yes, the depth information of the pixel is set according to its depth values in the depth maps corresponding to the joint overlapping region within its estimated region. An integrated depth map is generated by using the depth information of all the pixels.