Method and apparatus for judging touch point

Abstract

The invention relates to a method and an apparatus for judging a touch point. The method comprises the steps of performing calibration operation on a device; performing data acquisition, stopping acquisition when it is judged that acquired data covers a screen of the device in a preset threshold, and defining the data acquired at the moment as training data; performing stipulating and cleaning operations on the training data, and generating a training sample; selecting a one-class classifier, defining an input, an output and a kernel function, performing value assignment and training on a parameter of the kernel function, and generating a classifier; classifying touch points, obtained by the device through the screen, by the generated classifier to generate a classification result; and finishing the judgment of the touch points through the classification result. According to the method, the problem of insufficiently accurate judgment on the touch points in a conventional technology is solved and the operation of effectively identifying noisy points in the touch points or the effective touch points is realized; and the method has relatively high accuracy, flexibility and usability.

Description

technical field [0001] The invention relates to the technical field of touch device detection, in particular to a method and device for judging a touch point. Background technique [0002] As we all know, in touchable interactive large-screen systems, the recognition of touch points is the core issue. The simplest method is to set a fixed area and perimeter threshold. The light spots in all positions in the photos taken by the camera are judged by this threshold. Those within the range are valid touch points, otherwise they are invalid. But in actual use, this method will include a lot of noise, such as strip noise and so on. What's more serious is the problem of near-large and far-small problems caused by the camera. The light spots closer to the camera appear larger in the photos; the laser surface shot by the laser has the problem that the light spots closer to the laser appear larger. Under the influence of these two factors, the following situation becomes urgent to b...

AI Technical Summary

Problems solved by technology

What's more serious is that the near-large and far-small problems caused by the camera are larger in the photo if the light spot is closer to the camera; the laser surface shot by the laser has the problem that the light spot closer to the laser appears larger

Under the influence of these two factors, the following situation becomes urgent to be solved: it is difficult to determine a set of fixed thresholds applicable to all situations; After the light spot includes a sufficiently tight threshold, some noises that are far away from the camera and have a weak light-gathering surface but a large area will become difficult to distinguish

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