Non-contact laser virtual instrument

1. Program introduction:
The infrared laser is located at the lowest end of the device, so that the generated infrared laser plane is as parallel as possible and close to the desktop. Fingers are placed on the background keyboard area on the desktop to block the infrared laser beam and present a spot shape in the wide-angle camera; the 150-degree wide-angle camera is located At the top of the device, you can obtain the hitting video stream of the entire key area. At the same time, in order to overcome the interference of other spectrums, an infrared filter is added to the outside of the camera to filter the non-infrared spectrum; the image acquisition module realizes the frame collection of the key area hitting image Then send it to the computer for image processing.
For image processing, first use Zhang Zhengyou's algorithm to correct the input wide-angle fisheye image. Secondly, perform preprocessing operations such as filtering, gradation, and binarization on the corrected wide-angle fisheye image. Then, the contour of each spot area is fitted based on the least square method, and then the center position coordinates of the spot area are calculated. Finally, the coordinates of the finger spot area are transformed into three-dimensional coordinates, mapped to the background key area of the musical instrument, and the corresponding keys are obtained to realize the non-contact trigger percussion playing function.
2. Main function parameters:
Infrared line laser 808nm 50mw
150 degree wide angle camera
3. The core advantages of the program:
The low cost is 200 yuan, and it can be carried around like a cup. One device simulates the performance of multiple musical instruments. It can be connected with music software to achieve more powerful functions. It can be played on any surface without hurting the eyes.
4. Solution application market segment:
At present, the music training industry is developing rapidly and the market is booming. The sales volume of musical instruments and the scale of training institutions are increasing year by year. Now parents are paying more and more attention to the important role of music in the development of babies, from prenatal education to mini-version musical instruments to early music education. The lessons are all involved. Physical musical instruments are expensive and inconvenient to carry. There are relatively few portable musical instruments on the market, and they have many defects.
Our laser virtual musical instrument restores the usage and sound quality of real musical instruments, with fewer parts, light weight and low price. Take into account multiple instruments, multiple performances on one device. Using infrared laser beam projection to simulate musical instrument keys, bringing users a novel experience and a sense of technology. It is suitable for all kinds of music lovers' practice creation, children's music enlightenment education and ordinary people's life entertainment. So whether it is children from poor families, schools in remote mountain areas, or people who live in small houses or often in small spaces in cabins and cabins, they can all enjoy the beauty of music. The scope of application is wide and the market prospect is excellent.

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Industry Classification: Game Toys

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