KR100936115B1 - Mouse Activity Measuring Instrument - Google Patents

Abstract

The mouse activity measurement system of the present invention utilizes a Frustrated Total Internal Reflection (FTIR) phenomenon, in which total light is reflected inside the medium at the boundary of the medium at the angle of incidence above the critical angle. When an object with light properties comes into contact with the boundary of the light source, light is diffused due to obstacles in total reflection at that part. The present invention mouse activity measuring system is a touch acquisition unit 10 that can measure the movement of the mouse using the total reflection disorder phenomenon, the image acquisition unit for detecting the light diffused by the mouse in contact with the touch detection unit 10 ( 20) and an image processor 30 for detecting the position of the mouse from the acquired image.

Mouse, activity, total reflection, total reflection disorder

Description

Mouse Activity Measuring Instrument

       Publication No. 10-2001-0058523 (2001.07.06)

Name of the invention: song accompaniment apparatus having a calorie measurement function and calorie consumption method

 In clinical trials using animals such as mice, measuring the motility of an animal is very important as experimental data used as basic data for reflecting the difference in basal metabolic rate due to the difference in motility among individual animals in clinical trials.

 In order to measure the basal metabolic rate, conventional measurement methods include image processing and optical sensor arrays.

  Image processing method is a device that calculates the amount of movement of a mouse by detecting the mouse in the image by processing the image by processing the mouse with the camera and processing the detected mouse position continuously. It is a system that measures the movement of the mouse by recognizing the mouse in the image taken by computer software by shooting the movement. Systems that can do such image processing include OpenCV, Labview, MathLab, MVTec, and ImageLb. However, the conventional momentum measurement system using the image processing method was able to acquire the image in the dark environment without using the thermal imaging camera, there was an inadequate part for measuring the momentum of nocturnal animals such as mice.

  In the method using the optical sensor array, as shown in Fig. 4, the sensors for detecting objects are arranged at equal intervals on the floor where the mouse is raised. By analyzing the current position of the mouse to determine the position of the mouse continuously by measuring the movement of the mouse. The system is also small, but each sensor generates visible or infrared light because the light sensor consists of a light emitter and a light receiver. Therefore, the method using the light sensor array is also not necessarily suitable for measuring the momentum of nocturnal animals.

  Measuring the momentum of an animal is a characteristic of each individual, and it is very important to measure the characteristics of an individual in a natural state without external stimulus. Since nocturnal animals may have different momentum, they need a system that can measure momentum in an environment with very little light or 100% light. However, in any case, it is difficult to measure the movement of the mouse in the dark environment without light by the conventional method of measuring the momentum.

   In order to solve the above problems, the present invention has been invented a device capable of detecting the movement of a mouse even in a dark environment. The mouse activity measurement system of the present invention utilizes a Frustrated Total Internal Reflection (FTIR) phenomenon, in which total light is reflected inside the medium at the boundary of the medium at the angle of incidence above the critical angle. When an object with light properties comes into contact with the boundary of the light source, light is diffused due to obstacles in total reflection at that part. The diffused light can be measured on both the surface where the object touches and on the opposite surface. When an opaque object touches, light can be measured on the opposite side without light leaking toward the contact surface. Therefore, with this total reflection disorder, the light generated from the opposite surface in contact with the object can be acquired by the camera, and the software of the computer can be used to recognize the image and measure the activity of the mouse moving in the light-free environment. Figure 3 shows the image processing on the computer using the PC Cam.

  The mouse activity measuring device 1 of the present invention detects light diffused by the touch of a mouse in contact with the touch sensing unit 10 and the touch sensing unit 10, which can measure the movement of the mouse by using total reflection disorder. It is configured to include an image acquisition unit 20 and an image processing unit 30 for detecting the position of the mouse from the acquired image.

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The present invention is to measure the amount of movement of the mouse and the conventional devices were required to use light in the area where the mouse is active or to generate light to obtain the movement of the mouse, but the present invention is a mouse By using a general camera to detect the movement of the mouse with the software, but not a little light on the mouse to measure the movement of the mouse in the dark state, it is possible to measure the natural movement of the mouse in the absence of light environment By providing a device that can measure the effect of accurate movement of the mouse can be measured.

     First of all, the touch sensing unit 10 includes a UV blocking film 11, a light source 12 composed of LEDs, a bottom surface 13 of an inclined plane cut at an angle of 45 degrees, and light from the light source 12 is counted. Consists of the bottom surface 13, edge portion 14 surrounding the light source 12,

  The image acquisition unit 20 is composed of a camera 21 for acquiring an image and driving software 22 for driving the camera. The image processor 30 calculates the activity of the mouse using the position recognizing unit 31 which recognizes the current position of the mouse using the image acquired by the image acquisition unit, and the position and the current position recognized from the past image. It is composed of an activity calculating unit 32. 1 to 3 will be described in detail the configuration, operation and effect of the invention as follows.

Example 1

  An infrared cut film 11 is attached to the upper surface to block the light generated from the light source 12 to the area where the mouse is active, and the side border 15 is 5 mm thick at a 10 x 7 inch area inclined at 45 degrees. The light source 12 and the light source 12 and the bottom surface 13, which are composed of a flat acrylic plate of infrared light and an infrared LED that emits light on the side border 15, in a depressed shape, Touch sensing unit 10 including an edge 14 to prevent leakage.

Example 2

  The camera 21 positioned on the opposite side of the touch sensing unit 10 and acquiring an image generated when the mouse is touched by the touch sensing unit uses a QUICKCAM PRO5000 having a USB interface sold by Logitech Co., Ltd. The drive software 22 also used drive software for the QUICKCAM PRO5000 provided by Logitech.

  In order to measure the activity of the mouse, the camera was positioned as shown in Fig. 1 and the image generated by the mouse movement was stored in the computer at the speed of 10 frames per second using the camera 21.

Example 3

 The stored images were analyzed using HALCON 6.0, an image processing software sold by MVtec. This HALCON 6.0 software includes basic functions such as noise reduction of image image, image binarization, detection of boundary of images in image, calculation of area of detected image, calculation of city center of image, and so on. It is configured to complete image processing program by calling and connecting as needed.

As a method of measuring the motion of the mouse used in the present invention, the current position of the mouse was first determined by the method described below, and a method of calculating the motion on the mouse was compared with an image one frame before.

  As a basic method of determining the current position of the mouse, it was divided into a case where one chunk image was obtained and an image divided into chunks was input.

This is an image processing area in the previous images is less than 0.25 cm ² was removed in a meaningless image is regarded as image noise, it was calculated to be only the image is separated when the area of the image of at least 0.25 cm ^2.

First, when an area of one lump image is 0.25 ² cm-50 ² cm, the area center of the image is determined as the center position of the mouse when the mouse is sitting or lying down.

If the image consists of more than one chunk, the largest image is 10 ² cm-50 ² cm The mouse is sitting or lying down and the center of the image is determined by the mouse's center position. Is 0.25 ² cm-10 ² cm, the mouse is moving with only the forefoot and hind foot. The coordinates of the area center of each image are obtained and the distance between each coordinate is calculated. Decide

Example 4

 The camera 21 positioned on the opposite side of the touch sensing unit 10 and acquiring an image generated when the mouse is touched by the touch sensing unit uses a QUICKCAM PRO5000 having a USB interface sold by Logitech Co., Ltd. The drive software 22 directly interfaced with the image processing program HALCON 6.0 using TWAIN, a computer interface program provided by MVtec, to directly acquire an image from the camera in the image processing program and measure the activity of the mouse in real time.

      Figure 1. Appearance of the mouse activity finder

      Figure 2. Touch Sensing Unit of Mouse Activity Meter

      Figure 3. Touch Sensing Unit of Mouse Activity Meter

      Figure 4. Image Processing Unit of Mouse Activity Finder

      Figure 5. Traditional mouse activity measurement algorithm

Claims (6)

Mouse momentum measuring device consisting of a touch sensing unit having a bottom surface to check the position of the mouse using the total reflection disorder phenomenon and an image processing unit measuring the amount of movement of the mouse by continuously detecting the position of the mouse detected by the touch sensing unit To The touch sensing unit 10 may include a light source 12 and a bottom surface 13 having an infrared ray blocking film 11 attached to an upper surface to block light generated from the light source 12 from being counted as an active area of the mouse. The light source 12 surrounds the bottom surface 13 made of acryl in the form of a depressor from the side, so that the light of the light source 12 can be supplied to the side surface of the bottom surface 13 without leaking. Consists of the side border portion 15 for fixing the light source to occur, The image processing unit may include an image acquisition unit including a camera 21 and driving software 22 for detecting light generated by total reflection failure on the surface of the touch sensing unit 10 according to the movement of a mouse and acquiring it in the form of an image. 20) and an image processing unit (30) comprising a position recognition unit (31) and an activity calculating unit (32) for finding the position of the mouse and calculating the amount of movement from the acquired image. delete delete The method of claim 1, wherein the position recognition unit 31 processes the image by obtaining a single chunk and a case where an image divided into multiple chunks is input and obtains when the image is obtained by a single chunk. If the area of the image is 0.25 ² cm or more and 50 ² cm or less, the mouse momentum measuring device, characterized in that for determining the area center of the image as the center of the mouse. The method of claim 1, wherein the position recognition unit 31 divides and processes a case in which an image is obtained as a single mass and a case in which an image divided into multiple masses is input. When the image is 10 ² cm or more and 50 ² cm or less, the mouse momentum measuring device, characterized in that for determining the area center of the image as the center of the mouse. The method of claim 1, wherein the position recognition unit 31 is divided into a case where the image is obtained as a single chunk and an image divided into multiple chunks are input and the largest image is 0.25 ² cm or more and 10 ² In the case of cm or less, after calculating the coordinates of the center of the area of each image, the distance between the coordinates of the mouse movement moment measuring device characterized in that the center of the two points representing the longest distance is determined as the center of the mouse.

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