JP5055548B2 - Exercise support apparatus and computer program - Google Patents

Description

  The present invention relates to an exercise support device that supports a stepping exercise and related technology.

  Patent Document 1 discloses a stepper that allows a user to exercise by placing a left foot and a right foot on a left footrest and a right footrest, respectively, and stepping on the left and right alternately. Such stepping exercise by a stepper is monotonous, and considerable effort is required to perform it continuously over a long period of time. The same applies to exercises by cycling machines.

  For this reason, in Patent Document 2, the cycling machine and the monitor are combined by a dedicated computer, and the computer displays a video according to the movement of the pedal so that the user can continuously exercise. We have proposed an exercise support device to assist.

JP-A-6-91018 JP 2003-205051 A

  However, the exercise support device of Patent Document 2 requires a cycling machine and a dedicated computer, and the user must purchase them. For this reason, not only a user's economical burden is large, but a comparatively wide installation place is also required.

  Accordingly, an object of the present invention is to provide an exercise support device and related technology that can support the continuation of the stepping exercise while reducing the economic burden on the user and realizing space saving.

  According to an aspect of the present invention, the exercise support device includes an image generation unit that generates an image for guiding a player to step, a first reflector mounted on the player's left foot, and a second reflection mounted on the right foot. An imaging means for imaging a body, a detection means for detecting the first reflector and the second reflector based on a result of imaging by the imaging means, and a result of detection by the detection means. Analyzing means for analyzing the motion of one reflector and the motion of the second reflector, and processing means for executing information processing according to the result of the analysis by the analyzing means and reflecting it in the video.

  According to this configuration, not only the stepping guide but also the movements of the first reflector and the second reflector, that is, the movements of both feet of the player are reflected in the video, so that an interactive exercise support device can be provided. Therefore, since a response is returned to the stepping, it is possible to add interest to the monotonous stepping, and as a result, it is possible to support the continuation of the stepping exercise. In addition, no special exercise equipment is required, and it is only necessary to attach the first reflector and the second reflector to the foot, so that it is possible to reduce the user's economic burden and save space.

  In addition, since the player wears the first reflector and the second reflector and analyzes the movements of both feet, it is possible to provide more exercise items compared to the case of analyzing only the movement of one foot. Become. For example, when analyzing only the movement of one leg, it is possible to detect a step but not a jump. On the other hand, when analyzing the movements of both feet, it is possible to detect not only steps but also jumps. Therefore, it is possible to add an item that causes the player to jump.

  In the exercise support apparatus, the video generation means generates a video that guides the player to jump.

  In the exercise support apparatus, the first reflector and the second reflector retroreflect the received light.

  The exercise support apparatus further includes a light emitting unit that intermittently emits light, and the imaging unit images the first reflector and the second reflector when the light emitting unit emits light and when the light turns off. The detection means detects the first reflector and the second reflector based on a difference between an image obtained by imaging at the time of light emission and an image obtained by imaging at the time of extinction.

  In the exercise support apparatus, the imaging unit images the first reflector mounted immediately below the player's left knee, and the second reflector mounted directly below the player's right knee. Take an image.

  According to this configuration, when the imaging unit is placed on the floor surface, the first reflector and the second reflector can be more reliably imaged in any state when the player steps on. .

  FIG. 1 is a diagram showing an overall configuration of an exercise support system according to an embodiment of the present invention. As shown in FIG. 1, this exercise support system includes an input device 5 to be worn on the left and right feet of a player 100, a cartridge 1 having an imaging unit 17, an adapter 3 having a cancel key 28, and a television monitor 7. Prepare. The cartridge 1 is electrically attached to the adapter 3. The adapter 3 is connected to the television monitor 7 by an AV cable 9.

  FIG. 2 is a perspective view of the cartridge 1 of FIG. As shown in FIG. 2, the cartridge 1 includes a flat rectangular parallelepiped main body and an imaging unit 17. An imaging unit 17 is attached to the upper surface of the main body of the cartridge 1. In this case, the imaging unit 17 is attached so that the surface thereof is inclined at a predetermined angle (for example, 40 degrees) with respect to the surface of the cartridge 1. A circular infrared filter 13 is attached to the center of the surface of the imaging unit 17, and four infrared light emitting diodes 15 are arranged so as to surround it. An image sensor 32 described later is disposed on the back side of the infrared filter 13.

  FIG. 3 is a diagram illustrating a mounting state of the input device 5 of FIG. As shown in FIG. 3, the input device 5 has a belt shape, and is made of, for example, nylon. A rectangular retroreflective sheet 11 is attached to the input device 5. The player 100 wears the input device 5 directly below the knee. In this case, the retroreflective sheet 11 is mounted so as to face the imaging unit 17. Since a Velcro (registered trademark) tape is attached to the input device 5, the player can easily wear it. The adapter 3 to which the cartridge 1 is attached is placed at a position where the retroreflective sheet 11 falls within the imaging range of the imaging unit 17.

  FIG. 4 is a diagram showing an electrical configuration of the cartridge 1 of FIG. 4, the cartridge 1 includes a multimedia processor 21, an image sensor 32, an infrared light emitting diode 15, an external memory 23, an EEPROM (electrically erasable programmable only memory) 27, an RTC (real time clock) 29, and A bus 25 is included.

  The multimedia processor 21 can access the external memory 23 through the bus 25. Therefore, the multimedia processor 21 can execute a program stored in the external memory 23 and can read and process data stored in the external memory 23. In the external memory 23, a program for performing each process shown in a flowchart described later, image data, audio data, and the like are stored in advance. Note that the external memory 23 includes necessary components such as a ROM, a RAM, and / or a flash memory according to the system specifications.

  Although not shown, the multimedia processor 21 is a central processing unit (hereinafter referred to as “CPU”), a graphics processing unit (hereinafter referred to as “GPU”), a sound processing unit (hereinafter referred to as “SPU”). ), A geometry engine (hereinafter referred to as “GE”), an external interface block, a main RAM, an A / D converter (hereinafter referred to as “ADC”), and the like.

  The CPU executes programs stored in the external memory 23 to perform various calculations and control of the entire system. As processing of the CPU related to the graphics processing, a program stored in the external memory 23 is executed, and parameters for enlargement / reduction, rotation, and / or translation of each object, viewpoint coordinates (camera coordinates), and line-of-sight vector are calculated. Perform calculations. Here, a unit composed of one or a plurality of polygons or sprites and applied with the same transformation of enlargement / reduction, rotation, and translation is referred to as an “object”.

  The GPU generates a three-dimensional image composed of polygons and sprites in real time and converts it into an analog composite video signal. The SPU generates PCM (pulse code modulation) waveform data, amplitude data, and main volume data, and analog-multiplies them to generate an analog audio signal. The GE performs a geometric operation for displaying a three-dimensional image. Specifically, the GE performs operations such as matrix product, vector affine transformation, vector orthogonal transformation, perspective projection transformation, vertex brightness / polygon brightness calculation (vector inner product), and polygon back surface culling processing (vector outer product).

  The external interface block is an interface with peripheral devices (in this embodiment, the image sensor 32, the infrared light emitting diode 15, the EEPROM 27, and the RTC 29), and includes a 24-channel programmable digital input / output (I / O) port. . The ADC is connected to four-channel analog input ports, and converts analog signals input from the analog input device (in this embodiment, the image sensor 32) into digital signals via these ADCs. The main RAM is used as a CPU work area, a variable storage area, a virtual storage mechanism management area, and the like.

  The multimedia processor 21 intermittently drives the four infrared light emitting diodes 15 to perform strobe shooting, and intermittently emits infrared light. Infrared light from the infrared light emitting diode 15 is reflected by the retroreflective sheet 11 attached to the input device 5 and input to the image sensor 32 through the infrared filter 13. Therefore, the image sensor 32 outputs an image signal including the retroreflective sheet 11 (when the infrared light is lit) to the multimedia processor 21. Since the infrared light emitting diode 15 is driven intermittently, the image sensor 32 also outputs an image signal when the infrared light is turned off.

  These analog image signals from the image sensor 32 are converted into digital image signals by an ADC built in the multimedia processor 21. The multimedia processor 21 obtains the difference between the digital image signal when the infrared light is turned on and the digital image signal when the infrared light is turned off, detects the retroreflective sheet 11 based on the difference signal DI (difference image DI), Analyze the movement. Thus, by obtaining the difference, noise due to light other than the reflected light from the retroreflective sheet 11 can be removed as much as possible, and the retroreflective sheet 11 can be detected with high accuracy.

  Based on the analysis result of the movement of the retroreflective sheet 11, the multimedia processor 21 performs other operations, graphic processing, sound processing, and the like, and outputs a video signal VD and an audio signal AU. The video signal VD and the audio signal AU generated by the multimedia processor 21 are given to the television monitor 7 via the adapter 3 and the AV cable 9, and accordingly, an image is displayed on the television monitor 7, and the speaker ( Audio is output from (not shown). The adapter 3 supplies the video signal VD generated by the multimedia processor 21 to the AV cable 9 as it is, and also amplifies the audio signal AU and supplies it to the AV cable 9.

  The EEPROM 27 is connected to the external interface block of the multimedia processor 21 and reads / writes data. The RTC 29 measures time based on a crystal oscillator (not shown), generates time information, and provides the time information to the multimedia processor 21.

  FIG. 5 is a view showing an example of an exercise support screen displayed on the television monitor 7 of FIG. Referring to FIG. 5, this exercise support screen includes a time display unit 31 that displays the total exercise time of the day, a calorie display unit 33 that displays the total calorie of the day, and a step display unit 35 that displays the total number of steps of the day. The time display unit 41 that displays the elapsed time of the exercise section guided by the exercise support screen, the high score display unit 43 that displays the highest score so far, the score display unit 45 that displays the score, and the player 100 An operation object 47 that moves in the horizontal direction according to the movement (in the figure, a cocoon form) 47 and a movement object 49 that moves down from the upper end of the screen toward the lower end along the lane 51 (a form of fruit) 49 are included. Note that the lane 51 is not actually displayed.

  When the multimedia processor 21 detects a jump of the player 100, the multimedia processor 21 moves the operation object 47 in a direction (left or right) corresponding to the jumped direction (left or right). Therefore, the player 100 jumps and operates the operation object 47 to try to catch the moving object 49 that descends with good timing. The multimedia processor 21 determines that the catch is successful if the moving object 49 is located within a certain range above and below the upper end of the operation object 47. The multimedia processor 21 gives points and accumulates the points on the score display unit 45 when the catch is successful. The multimedia processor 21 causes the moving objects 49 to appear and descend one after another until the time displayed on the time display unit 41 reaches a predetermined time.

  Here, in the present embodiment, the step performed by the player is an operation in which the player 100 raises one leg placed on the floor, lowers it, and places it again on the floor. Therefore, the repetition of the left and right alternating steps corresponds to stepping. One jump is converted into two steps and accumulated in the step display unit 35. Further, the calorie consumption of the player 100 is calculated using the number of steps, the height and weight input by the player 100 in advance, and the calorie consumption calculation formula stored in advance, and accumulated in the calorie display unit 33. Further, the time during which the player 100 is exercising is measured and accumulated in the time display unit 31.

  FIG. 6 is another exemplary view of an exercise support screen displayed on the television monitor 7 of FIG. Referring to FIG. 6, this exercise support screen includes a time display unit 31, a calorie display unit 33, a step display unit 35, a time display unit 37 for displaying the remaining time of the exercise section guided by the exercise support screen, and A step display unit 39 for displaying the number of steps in the exercise section guided by the exercise support screen is included.

  The multimedia processor 21 counts down from 10 seconds and displays it on the time display unit 37. The player 100 tries to step on as fast as possible. The multimedia processor 21 detects the stepping of the player 100 and displays the number of steps on the step display unit 39. Finally, the step display unit 39 displays the number of steps of the player 100 performed for 10 seconds.

  FIG. 7 is a view showing still another example of the exercise support screen displayed on the television monitor 7 of FIG. Referring to FIG. 7, this exercise support screen includes a time display unit 31, a calorie display unit 33, a step display unit 35, a player character 61 that jumps in response to a jump of the player 100, and a rope skipping rope performed by the player character 61. 63, a total number display unit 57 for displaying the total number of successful jumping ropes, a continuous number display unit 59 for displaying the number of consecutive successful jumping ropes, and a time display unit 53 for displaying the elapsed time of the exercise section guided by the exercise support screen. And the best record display part 55 which displays the highest value of the total number of times until now is included.

  When the multimedia processor 21 detects a jump of the player 100, the multimedia processor 21 causes the player character 61 to jump. In addition, the multimedia processor 21 rotates the rope 63 as if a skipping rope is turning. Then, when the player character 61 jumps when the rope 63 is located within a certain range centered on the lowest point, the multimedia processor 21 displays an image in which the player character 61 skillfully jumps over the rope 63. To do. However, if the player character 61 jumps at other timings, the multimedia processor 21 displays an image in which the skipping rope has failed.

  As described above, since the player character 61 jumps in synchronization with the jump of the player 100, the player 100 must jump at the timing when the rope 63 reaches the lowest point to cause the player character 61 to jump. The multimedia processor 21 displays the continuous success number of jumping ropes performed by the player character 61 on the continuous number display unit 59, and displays the total successful number of jumping ropes performed by the player character 61 in this exercise section on the total number display unit 57. . The multimedia processor 21 repeats the above processing until the time displayed by the time display unit 53 reaches a predetermined time.

  FIG. 8 is still another example of an exercise support screen displayed on the television monitor 7 of FIG. Referring to FIG. 8, this exercise support screen has a time display unit 31, a calorie display unit 33, a step display unit 35, an evaluation display unit 65, a left mark 69L, a right mark 69R, and how far the music has progressed. A gauge 67 is included. The left mark 69L and the right mark 69R are collectively referred to as a mark 69.

  The multimedia processor 21 reproduces music. In this case, the multimedia processor 21 displays a large ring 71 surrounding the mark 69 and contracts the ring 71 toward the mark 69. The player 100 tries to step with the foot indicated by the mark 69 at the timing when the wheel 71 overlaps the edge of the mark 69. In this case, the left mark 69L indicates a step with the left foot, and the right mark 69R indicates a step with the right foot.

  The multimedia processor 21 gives an “excellent” evaluation when it detects the step of the foot indicated by the mark 69 when the wheel 71 is located in the first predetermined range centered on the edge (circle) of the mark 69, When the wheel 71 is located in the second predetermined range centered on one predetermined range and the step of the foot indicated by the mark 69 is detected, a “good” evaluation is given. The multimedia processor 21 displays the number of evaluations on the evaluation display unit 65.

  When the player 100 performs the corresponding foot step at the timing when the wheel 71 reaches the edge (circle) of the mark 69, the multimedia processor 21 causes the wheel 71 to appear so that the player can step on the music. The multimedia processor 21 repeats the above processing until the music ends.

  FIG. 9 is still another example of an exercise support screen displayed on the television monitor 7 of FIG. Referring to FIG. 9, the exercise support screen includes a time display unit 31, a calorie display unit 33, a step display unit 35, a failure line 73, and a moving object group 75. The moving object group 75 includes a plurality of marks 77 arranged in the horizontal direction. As types of the mark 77, a mark 77L for instructing the step of the left foot, a mark 77R (not shown) for instructing the step of the right foot, and a mark 77J instructing to jump are prepared. In the illustrated example, the moving object group 75 includes three marks 77L, 77L, and 77J arranged in the horizontal direction.

  The multimedia processor 21 moves the moving object group 75 from the top to the bottom toward the failure line 73. Then, when the moving object group 75 reaches the failure line, the multimedia processor 21 determines that the failure has occurred and ends this item. On the other hand, when the multimedia processor 21 detects that the player 100 has performed the action indicated by the mark 77 included in the moving object group 75 in order from the left before the moving object group 75 reaches the failure line 73, the multimedia processor 21 succeeds. The moving object group 75 is extinguished. If it is determined to be successful, the multimedia processor 21 causes the moving object group 75 with one mark 77 added to appear and moves down toward the failure line 73. In the moving object group 75, a mark extending over a plurality of lines can be displayed. In the figure, there are three examples in one row.

  If the multimedia processor 21 detects that the player 100 has not performed the action indicated by the mark 77 in order from the left, the multimedia processor 21 determines that it has not been achieved, and continues to lower the moving object group 75. If the multimedia processor 21 determines that it has not been achieved, the multimedia processor 21 does not determine that the player 100 has succeeded until the player 100 performs an action in order from the left again.

  FIG. 10 is a flowchart showing an example of the overall processing flow by the multimedia processor 21 of FIG. As shown in FIG. 10, in step S1, the multimedia processor 21 performs initial setting of the system such as initialization of various variables (including flags and counters). In step S <b> 3, the multimedia processor 21 executes processing according to the application program stored in the external memory 23. In step S5, the multimedia processor 21 stands by until an interrupt due to the video synchronization signal occurs. That is, the multimedia processor 21 returns to the same step S5 when the interrupt due to the video synchronization signal has not occurred, and proceeds to step S7 when the interrupt due to the video synchronization signal has occurred. For example, the interruption by the video synchronization signal occurs every 1/60 seconds. In synchronization with this interruption, in step S7 and step S9, the multimedia processor 21 updates the image displayed on the television monitor 7 and reproduces the sound. Then, the multimedia processor 21 returns to step S3.

  The application program that controls the processing in step S3 includes a plurality of programs. A program for executing the photographing process of the retroreflective sheet 11, a program for executing a process of extracting the attention point of the retroreflective sheet 11 on the photographed image, and two detected attention points , A program for determining whether or not the player 100 has performed a step, a program for determining whether or not the player 100 has performed a jump, and a program for generating an exercise support screen Etc. are included. Hereinafter, these processes will be described with reference to flowcharts.

  FIG. 11 is a flowchart showing the flow of a photographing process which is one of the processes executed by the application program in step S3 of FIG. As shown in FIG. 11, in step S <b> 21, the multimedia processor 21 lights up the infrared light emitting diode 15. In step S23, the multimedia processor 21 acquires image data when the infrared light is lit from the image sensor 32, and stores it in the main RAM.

  Here, in the present embodiment, a CMOS image sensor of 32 pixels × 32 pixels is used as an example of the image sensor 32. Therefore, pixel data of 32 pixels × 32 pixels is output from the image sensor 32 as image data. This pixel data is converted into digital data by an A / D converter and stored as an element of a two-dimensional array P1 [X] [Y] on the main RAM.

  In step S25, the multimedia processor 21 turns off the infrared light emitting diode 15. In step S27, the multimedia processor 21 acquires image data (32 pixel × 32 pixel data) when the infrared light is extinguished from the image sensor 32, and stores it in the main RAM. In this case, the pixel data is stored as an element of a two-dimensional array P2 [X] [Y] on the main RAM.

  The flash photography is performed as described above. Here, in the two-dimensional coordinate system representing the position of each pixel constituting the image by the image sensor 32, the horizontal direction is the X axis and the vertical direction is the Y axis. The origin O is the upper left corner of the image. In this embodiment, since the image sensor 32 of 32 pixels × 32 pixels is used, X = 0 to 31 and Y = 0 to 31. This also applies to the difference image DI. The pixel data is a luminance value.

  FIG. 12 is a flowchart showing the flow of attention point extraction processing which is one of the processing executed by the application program in step S3 of FIG. As shown in FIG. 12, in step S <b> 43, the multimedia processor 21 determines pixel data when the infrared light emitting diode 15 is turned on (that is, elements of the array P <b> 1 [X] [Y]) and the infrared light emitting diode 15. The difference between the pixel data at the time of extinction (that is, the elements of the array P2 [X] [Y]) is calculated, and the difference pixel data is stored as the elements of the two-dimensional array Dif [X] [Y].

  Here, the elements of the array P1 [X] [Y] (that is, pixel data at the time of lighting) are the pixel data P1 [X] [Y], and the elements of the array P2 [X] [Y] (that is, pixel data at the time of turning off). May be expressed as pixel data P2 [X] [Y], and an element of the array Dif [X] [Y] (that is, difference pixel data) may be expressed as difference pixel data Dif [X] [Y].

  In step S45, the multimedia processor 21 substitutes “0” for the variable n. In step S47, the multimedia processor 21 scans elements of the array Dif [n] [0] to Dif [n] [31] to detect the maximum value. In step S51, the multimedia processor 21 determines whether or not the detected maximum value is greater than a predetermined threshold value Th, the process proceeds to step S53 if it is greater, otherwise the process proceeds to step S55.

  In step S53, the multimedia processor 21 substitutes the maximum value exceeding the predetermined threshold Th into the array max [n]. On the other hand, in step S55, the multimedia processor 21 assigns “0” to the array max [n].

  After step S53 or step S55, in step S57, the multimedia processor 21 increments the variable n by one. In step S59, the multimedia processor 21 determines whether or not the variable n is “32”. If NO is determined, the process proceeds to step S47, and if YES is determined, the process proceeds to step S61. In this way, the 32 pixels × 32 pixels Dif [X] [Y] are scanned to obtain the maximum value for each column. In step S61, the multimedia processor 21 executes an attention point extraction process for each of the two retroreflective sheets 11, that is, a two-point extraction process.

  FIG. 13 is a flowchart showing the flow of the two-point extraction process in step S61 of FIG. Referring to FIG. 13, in step S81, multimedia processor 21 scans the elements of arrays max [0] to max [31] to detect the maximum value. In step S83, the multimedia processor 21 proceeds to step S85 when the maximum value is detected, and proceeds to step S99 when it cannot be detected.

  In step S85, the multimedia processor 21 stores the detected coordinates of the maximum value as the coordinates of the first point of interest. In step S87, the multimedia processor 21 turns on a first attention point flag indicating that the first attention point exists.

  In step S89, the multimedia processor 21 masks a predetermined range around the maximum value detected in step S81 among the elements of the arrays max [0] to max [31]. Then, in step S91, the multimedia processor 21 performs a scan except for the masked predetermined range among the elements of the arrays max [0] to max [31], and detects the maximum value.

  In step S93, the multimedia processor 21 proceeds to step S95 if the maximum value is detected, and proceeds to step S103 if it cannot be detected. In step S95, the multimedia processor 21 stores the coordinates of the maximum value detected in step S91 as the coordinates of the second attention point. In step S97, the multimedia processor 21 turns on the second attention point flag indicating that the second attention point exists.

  On the other hand, after NO is determined in step S83, in step S99, the multimedia processor 21 stores (0, 0) as the coordinates of the first point of interest. In step S101, the multimedia processor 21 turns off the first attention point flag.

  In addition, after step S101 or after NO is determined in step S93, in step S103, the multimedia processor 21 stores (0, 0) as the coordinates of the second attention point. In step S105, the multimedia processor 21 turns off the second attention point flag.

  Immediately after the two-point extraction process of FIG. 13 is completed, it is determined which of the first and second attention points is the attention point of the left-foot retroreflection sheet 11 and which is the attention point of the right-foot retroreflection sheet 11. Can not. Therefore, the following left / right determination process is executed to assign left / right to the first and second attention points.

  FIG. 14 is a flowchart showing the flow of the left / right determination process which is one of the processes executed by the application program in step S3 of FIG. Referring to FIG. 14, in step S121, the multimedia processor 21 checks whether or not the first attention point flag is on. If the first attention point flag is on, the multimedia processor 21 proceeds to step S123 because the first attention point exists. In this case, since the first attention point does not exist, the process proceeds to step S145.

  If the first point of interest does not exist, the second point of interest also does not exist. Therefore, in step S145, the multimedia processor 21 stores the coordinates of the first and second points of interest as the coordinates of the left and right points of interest, respectively. In step S147, the left attention point flag and the right attention point flag are turned off. Here, the left attention point means the attention point of the retroreflection sheet 11 attached to the left foot, and the right attention point means the attention point of the retroreflection sheet 11 attached to the right foot. The left attention point flag is a flag that is turned on when a left attention point exists, and the right attention point flag is a flag that is turned on when a right attention point exists.

  After YES is determined in step S121, in step S123, the multimedia processor 21 checks whether or not the second attention point flag is on. If the second attention point flag is on, there is a second attention point. In the case of OFF, since there is no second attention point, the process proceeds to step S135.

  If NO is determined in step S123, it means that only the first point of interest exists. Therefore, in step S135, multimedia is determined in order to determine whether the first point of interest is the left point of interest or the right point of interest. The processor 21 determines whether or not the first attention point exists in the left half area of the captured image. If the first point of interest exists in the left half area of the captured image, the multimedia processor 21 sets the coordinates of the first and second points of interest in step S137 so that the first point of interest is the left point of interest. The coordinates are stored as the coordinates of the left and right attention points respectively, and in step S139, the left attention point flag is turned on and the right attention point flag is turned off. On the other hand, if the first attention point does not exist in the left half area of the captured image, that is, if it exists in the right half area, the multimedia processor 21 performs the step to set the first attention point as the right attention point. In S141, the coordinates of the first and second attention points are stored as the coordinates of the right and left attention points, respectively, and in step S143, the left attention point flag is turned off and the right attention point flag is turned on.

  If YES is determined in step S123, it means that the first attention point and the second attention point exist. Therefore, in step S125, in order to determine which is the left attention point and which is the right attention point, The multimedia processor 21 compares the X coordinate of the first point of interest with the X coordinate of the second point of interest.

  In step S127, the multimedia processor 21 determines that the X coordinate of the first target point is smaller than the X coordinate of the second target point, that is, if the first target point is located on the left side of the second target point, step S131. Otherwise, that is, if the first point of interest is located to the right of the second point of interest, the process proceeds to step S129.

  If YES is determined in step S127, the multimedia processor 21 determines the coordinates of the first and second attention points in step S131 so that the first attention point is the left attention point and the second attention point is the right attention point. Are stored as the coordinates of the left and right attention points, respectively, and the left attention point flag and the right attention point flag are turned on in step S133.

  On the other hand, if NO is determined in step S127, the multimedia processor 21 determines that the first attention point is the right attention point and the second attention point is the left attention point in step S129. Are stored as the coordinates of the right and left attention points, respectively, and the left attention point flag and the right attention point flag are turned on in step S133.

  The multimedia processor 21 executes the next step determination process to determine whether or not the player 100 has performed a step after the left / right determination process of FIG.

  FIG. 15 is a flowchart showing the flow of a step determination process that is one of the processes executed by the application program in step S3 of FIG. Referring to FIG. 15, in step S161, the multimedia processor 21 turns off the left input flag and the right input flag. The left input flag is a flag that is turned on when a left foot step is detected, and the right input flag is a flag that is turned on when a right foot step is detected. By this step S161, these flags are cleared each time the video frame is updated.

  In step S163, the multimedia processor 21 checks whether or not the left attention point flag is on. If it is on, the multimedia processor 21 proceeds to step S165 to determine whether or not there is a left step, and if off, proceeds to step S185. In step S165, the multimedia processor 21 calculates the velocity VyL of the left attention point in the Y-axis direction from the current and previous Y coordinates of the left attention point. In step S167, the multimedia processor 21 determines whether or not the left speed VyL is greater than a predetermined value VC (> 0). If larger, the process proceeds to step S169, otherwise proceeds to step S177. Here, since the positive direction of the Y-axis is vertically downward, the fact that the left speed VyL is larger than the predetermined value VC (> 0) means that the left foot retroreflective sheet 11 has moved vertically downward.

  In step S169, the multimedia processor 21 increments the left success counter CsL by one. In step S171, the multimedia processor 21 clears the left failure counter CfL. In step S173, the multimedia processor 21 determines whether or not the left success counter CsL is equal to a constant N0 (an integer equal to or greater than 2). If equal, the process proceeds to step S175. Otherwise, the multimedia processor 21 proceeds to step S175. Proceed to step S187 to determine the presence or absence.

  After YES is determined in step S173, in step S175, the multimedia processor 21 turns on the left input flag and proceeds to step S187.

  After NO is determined in step S167, in step S177, the multimedia processor 21 increments the left failure counter CfL by one. In step S179, the multimedia processor 21 determines whether or not the left failure counter CfL is equal to a constant N1 (an integer equal to or greater than 2). If equal, the process proceeds to step S181. Otherwise, the multimedia processor 21 proceeds to step S181. Proceed to step S187 to determine the presence or absence. In step S181, the multimedia processor 21 clears the left success counter CsL. In step S183, the multimedia processor 21 clears the left failure counter CfL and proceeds to step S187.

  As described above, if the left success counter CsL reaches the constant N0 (step SS173) before the left failure counter CfL becomes equal to the constant N1 (step SS179), it is determined that the left step has been performed (step SS175). ). Therefore, the left speed VyL does not necessarily exceed the predetermined value VC N0 times continuously. However, if the left speed VyL is not more than the predetermined value VC continuously N1 times, the left success counter CsL is cleared (steps S171 and S181).

  After NO is determined in step S163, in step S185, the multimedia processor 21 clears the left success counter CsL and the left failure counter CfL, and proceeds to step S187 to determine whether there is a right step.

  In step S187, the multimedia processor 21 checks whether or not the right attention point flag is on. If the flag is on, the multimedia processor 21 proceeds to step S189. If the flag is off, the multimedia processor 21 proceeds to step S209. In step S189, the multimedia processor 21 calculates the velocity VyR of the right attention point in the Y-axis direction from the current and previous Y coordinates of the right attention point. In step S191, the multimedia processor 21 determines whether or not the right speed VyR is greater than a predetermined value VC (> 0). If larger, the process proceeds to step S193, otherwise the process proceeds to step S201. Here, since the positive direction of the Y-axis is vertically downward, the right velocity VyR being greater than the predetermined value VC (> 0) means that the right foot retroreflective sheet 11 is moving vertically downward. .

  In step S193, the multimedia processor 21 increments the right success counter CsR by one. In step S195, the multimedia processor 21 clears the right failure counter CfR. In step S197, the multimedia processor 21 determines whether or not the right success counter CsR is equal to a constant N0 (an integer equal to or greater than 2). If equal, the process proceeds to step S199, and otherwise returns.

  After NO is determined in step S191, in step S201, the multimedia processor 21 increments the right failure counter CfR by one. In step S203, the multimedia processor 21 determines whether or not the right failure counter CfR is equal to a constant N1 (an integer of 2 or more). If they are equal, the process proceeds to step S205, and otherwise returns. In step S205, the multimedia processor 21 clears the right success counter CsR. In step S207, the multimedia processor 21 clears the right failure counter CfR and returns.

  As described above, if the right success counter CsR reaches the constant N0 (step SS197) before the right failure counter CfR becomes equal to the constant N1 (step SS203), it is determined that the right step has been performed (step SS199). ). Therefore, the right speed VyR does not necessarily exceed the predetermined value VC N0 times continuously. However, if the right speed VyR is not more than the predetermined value VC N1 times continuously, the right success counter CsR is cleared (steps S195 and S205).

  After NO is determined in step S187, in step S209, the multimedia processor 21 clears the right success counter CsR and the right failure counter CfR and returns.

  The multimedia processor 21 performs the next jump determination process after the step determination process of FIG. 15 to determine whether or not the player 100 has made a jump.

  FIG. 16 is a flowchart showing the flow of the jump determination process which is one of the processes executed by the application program in step S3 of FIG. Referring to FIG. 16, in step S221, the multimedia processor 21 turns off the jump flag. The jump flag is a flag that is turned on when it is determined that the player 100 has jumped. By this step S221, this flag is cleared every time the video frame is updated.

  In step S223, the multimedia processor 21 determines whether or not the left attention point flag is on. If the flag is on, the multimedia processor 21 proceeds to step S225. If the flag is off, the multimedia processor 21 proceeds to step S237. In step S225, the multimedia processor 21 determines whether or not the right attention point flag is on. If it is on, the multimedia processor 21 proceeds to step S227. If it is off, the multimedia processor 21 proceeds to step S237.

  In step S227, the multimedia processor 21 determines whether or not the left speed VyL is smaller than 0, the process proceeds to step S229 if it is smaller, otherwise the process proceeds to step S237. In step S229, the multimedia processor 21 determines whether or not the right speed VyR is smaller than 0, the process proceeds to step S231 if it is smaller, otherwise the process proceeds to step S237.

  Here, since the positive direction of the Y axis is vertically downward, the left velocity VyL being negative means that the retroreflective sheet 11 of the left foot is moving vertically upward. Similarly, when the right velocity VyR is negative, the retroreflective sheet 11 on the right foot is moving vertically upward.

  In step S231, the multimedia processor 21 increments the jump counter CJ by one. In step S233, the multimedia processor 21 determines whether or not the jump counter CJ is equal to a constant N2 (an integer equal to or greater than 2), the process proceeds to step S235 if it is equal, otherwise the process returns. In step S235, the multimedia processor 21 turns on the jump flag.

  After NO is determined in step S223, S225, S227, or S229, the multimedia processor 21 clears the jump counter CJ to 0 in step S237.

  As described above, it is a condition for determining a jump that the state in which the left attention point and the right attention point are moving vertically upward occurs N2 times in succession.

  FIG. 17 is a state transition diagram of the exercise support process executed by the multimedia processor 21 of FIG. Referring to FIG. 17, in step S <b> 251, multimedia processor 21 selects a menu to be executed on the day from a plurality of types of menus based on date information based on RTC 29. In step S253, the multimedia processor 21 displays the menu selected in step S251 on the television monitor 7.

  Here, in the present embodiment, five items are prepared corresponding to FIGS. Warm-up and cool-down are not included in the number of items. In each menu, any n items out of the five items are described between warm-up and cool-down. n is an integer of 1 or more and is 5 at the maximum, and is determined independently for each menu. The first to nth items described in the menu are collectively referred to as the Nth item.

  In step S255, the multimedia processor 21 displays a screen for warm-up on the television monitor 7 in accordance with the selected menu. After finishing the warm-up process, the multimedia processor 21 displays a screen for the Nth section on the television monitor 7 in step S257-N according to the selected menu. After finishing the processing for the Nth section, the multimedia processor 21 displays a screen for the (N + 1) th section on the television monitor 7 in step S257- (N + 1) according to the selected menu. In this way, the multimedia processor 21 executes the items included in the selected menu in order from the first item to the n-th item.

  The multimedia processor 21 displays the screen for cool-down on the television monitor 7 in step S259 after finishing the processing for the n-th section. Then, after finishing the process for cool-down, the multimedia processor 21 displays a graph in step S261 and ends the process. However, before the end, the multimedia processor 21 saves the total exercise time of the day, the total number of steps, and the total calories in the EEPROM 27 in association with the date.

  For ease of understanding, the flow of the exercise support process of the multimedia processor 21 has been described with the state transition diagram, but the process of FIG. 17 is executed as a process by the application program executed in step S3 of FIG. .

  Next, the flow of processing for each item will be described. These processes are also executed as a process by the application program executed in step S3 of FIG. 10, but for convenience of explanation, not the flowchart synchronized with the video synchronization signal but the transition diagram of FIG. It will be described with a flowchart of the included form.

  FIG. 18 is a flowchart of the Nth execution routine (time completion condition) executed in step S257-N of FIG. The item of the time end condition is the item corresponding to FIGS. FIG. 18 shows a process for the item corresponding to FIG.

  Referring to FIG. 18, in step S281, multimedia processor 21 executes an initialization process for the routine. In step S283, the multimedia processor 21 displays the exercise support screen of FIG. In step S285, the multimedia processor 21 starts measuring the item time Ti. The item time Ti is the elapsed time of the item, and the item time Ti is displayed on the time display unit 41.

  In step S287, the multimedia processor 21 checks the cancel key 28 (see FIG. 1) of the adapter 3. In step S289, the multimedia processor 21 proceeds to step S307 when the cancel key 28 is ON. Therefore, when the cancel key 28 is pressed, this item is skipped. On the other hand, if the cancel key 28 is off, the multimedia processor 21 proceeds to step S291.

  In step S291, the multimedia processor 21 determines whether or not a fixed time has elapsed after the latest input. If not, the multimedia processor 21 proceeds to step S295. If it has elapsed, the process proceeds to step S293. Here, the input means that any one of the left input flag (step S175), the right input flag (step S199), and the jump flag (step S235) is turned on. In step S293, the multimedia processor 21 stops measuring the total time Tt, and proceeds to step S295. The total time Tt is the total of exercise time of the day and is displayed on the time display unit 31.

  In step S295, the multimedia processor 21 checks the right input flag, the left input flag, and the jump flag (see FIGS. 15 and 16). If any of them is ON (input is present), the process proceeds to step S297. Otherwise, that is, when all of the right input flag, the left input flag, and the jump flag are off (no input), the process proceeds to step S301.

  In step S297, the multimedia processor 21 starts timing when the counting of the total time Tt is stopped. In step S299, the multimedia processor 21 executes a predetermined process in response to an input (left step, right step, or jump) from the player.

  FIG. 19 is a flowchart showing the flow of input response processing in step S299 of FIG. This process is executed corresponding to the item of FIG. Referring to FIG. 19, in step S321, multimedia processor 21 increments total step counter Tts. The total step counter Tts is the total number of steps of the day. The multimedia processor 21 increments by two when the jump flag is on, and increments by one when the left input flag or the right input flag is on.

  In step S323, the multimedia processor 21 increments the item step counter Tcs. The item step counter Tcs is the total number of steps in the item being executed. The multimedia processor 21 increments by two when the jump flag is on, and increments by one when the left input flag or the right input flag is on.

  In step S325, the multimedia processor 21 calculates the total calorie Tc (= Tts ×) based on the value of the total step counter Tts, the weight W (kg) of the user, and the unit calorie consumption value U (kcal / kg · step). W × U) is calculated. In step S327, the multimedia processor 21 determines whether or not the operation object 47 has caught the moving object 49. In this case, the horizontal coordinate of the center of the moving object 49 is located in a predetermined horizontal range centered on the horizontal coordinate of the center of the operation object 47, and the vertical coordinate of the center of the moving object 49 is the upper end of the operation object 47. When it is located in a predetermined vertical range centered on the vertical coordinate, it is determined that the catch has been made. In step S329, the multimedia processor 21 calculates points to be displayed on the score display unit 45.

  In step S331, the multimedia processor 21 updates the status (coordinates and image data) of various images that change and / or appear depending on the input from the player 100. In the case of the problem of FIG. 5, the images depending on the input are the operation object 47, the calorie display unit 33, the step display unit 35, and the score display unit 45.

  Returning to FIG. 18, in step S301, the multimedia processor 21 does not depend on the input from the player 100, that is, the status (coordinates) of various images that change and / or appear automatically (by the program). And image data etc.). In the case of the problem of FIG. 5, the automatic images are the moving object 49, the time display unit 41, and the time display unit 31. However, the time display unit 31 is not completely automatic but depends on partial input in that it stops when there is no input for a certain period of time (step S293).

  In step S303, the multimedia processor 21 updates the display based on the current status of various images. In step S305, the multimedia processor 21 determines whether or not the item time Ti is equal to the predetermined time END. If the item time Ti is equal, the process proceeds to step S307 to end the process of the item. The process returns to step S287. In step S307, the multimedia processor 21 stores the total time Tt, the value of the total step counter Tts, and the total calorie Tc in the main RAM. In step S309, the multimedia processor 21 displays the result screen and proceeds to the execution routine for the next item.

  Incidentally, the problem of FIG. 6 and the problem of FIG. 7 are common to the problem of FIG. 5 in that time is an end condition. Therefore, the processing is executed in the same manner as the processing shown in FIGS. However, in the problem of FIG. 6, in step S285, the countdown from 10 seconds is executed instead of counting the item time Ti and displayed on the time display unit 37, and the value of the item step counter Tcs is displayed on the step display unit 39. Is displayed. The status of the time display unit 37 is updated in step S301, and the status of the step display unit 39 is updated in step S331. Steps S327 and S329 are not executed.

  Further, in the problem of FIG. 7, in step S <b> 327 of FIG. 19, not the catch determination but a determination (success determination process) whether or not the player character 61 jumps skillfully without being caught by the rope 63. Further, in step S329, not the point calculation but the count of the number of continuous successes for display on the continuous number display unit 59 and the total number of successes for display on the total number display unit 57 are executed. The total number display unit 57, the continuous number display unit 59, and the status of the player character 61 are updated in step S331. The statuses of the rope 63 and the time display unit 53 are updated in step S301. However, if it is determined that the failure is determined in the success determination process, an image of the rope 63 representing the failure is displayed, and therefore the rope 63 is not completely automatic but partially depends on input. The item time Ti is displayed on the time display unit 53.

  FIG. 20 is a flowchart of the execution routine (the end of music is an end condition) of the Nth section executed in step S257-N of FIG. The item with the music end condition is the item corresponding to FIG. Referring to FIG. 20, in step S351, multimedia processor 21 executes an initialization process for the routine. In step S353, the multimedia processor 21 displays the exercise support screen of FIG. In step S355, the multimedia processor 21 starts playing music.

  The processes of steps S357, S359, S361, S363, S365, S367, and S369 are the same as the processes of S287, S289, S291, S293, S295, S297, and S299 in FIG. However, in step S327 of the input response process of FIG. 19, determination of “excellent” and “good” is executed instead of catch determination. In step S329, the count displayed on the evaluation display unit 65 is executed. The status of the evaluation display unit 65 is updated in step S331.

  Returning to FIG. 20, in step S371, the multimedia processor 21 does not depend on the input from the player 100, that is, the status (coordinates) of various images that change and / or appear automatically (by the program). And image data etc.). In the case of the problem of FIG. 8, the automatic image is a wheel 71 and a gauge 67.

  In step S373, the multimedia processor 21 updates the display based on the current status of various images. In step S375, the multimedia processor 21 determines whether or not the music has ended. If the music has ended, the multimedia processor 21 proceeds to step S377 to end the processing of this item, and if not, step S357. Return to. In step S377, the multimedia processor 21 stores the total time Tt, the value of the total step counter Tts, and the total calorie Tc in the main RAM. In step S379, the multimedia processor 21 displays the result screen and proceeds to the execution routine for the next item.

  FIG. 21 is a flowchart of the execution routine (failure is an end condition) for the Nth section executed in step S257-N in FIG. The item of the failure end condition is the item corresponding to FIG. Referring to FIG. 21, in step S391, multimedia processor 21 executes an initialization process for the routine. In step S393, the multimedia processor 21 displays the exercise support screen of FIG.

  The processes of steps S395, S397, S399, S401, S403, S405, and S407 are the same as the processes of S287, S289, S291, S293, S295, S297, and S299, respectively, in FIG. However, in step S327 of the input response process of FIG. 19, not the catch determination but a determination as to whether or not the player 100 has input as instructed by the moving object group 75 is executed.

  Returning to FIG. 21, in step S409, the multimedia processor 21 does not depend on the input from the player 100, that is, the status (coordinates) of various images that change automatically and / or appear automatically (by the program). And image data etc.). In the case of the problem of FIG. 9, the automatic image is each mark 77 of the moving object group 75. However, the mark 77 disappears when there is an input as instructed, and is not completely automatic but depends on a part of the input.

  In step S411, the multimedia processor 21 updates the display based on the current status of various images. In step S413, the multimedia processor 21 determines whether or not the mark 77 has reached the failure line 73. If the mark 77 has reached, the process proceeds to step S415 to end the processing of this item. If not, the process returns to step S395. In step S415, the multimedia processor 21 stores the total time Tt, the value of the total step counter Tts, and the total calorie Tc in the main RAM. In step S417, the multimedia processor 21 displays the result screen and proceeds to the execution routine for the next item.

  As described above, according to the present embodiment, not only the stepping guide but also the movement of the retroreflective sheet 11 attached to both feet, that is, the movement of both feet of the player 100 is reflected in the video. Can provide a simple exercise support system. Therefore, since a response is returned to the stepping, it is possible to add interest to the monotonous stepping, and as a result, it is possible to support the continuation of the stepping exercise. In addition, no special exercise equipment is required and only the retroreflective sheet 11 needs to be attached to the foot, so that it is possible to reduce the user's economic burden and save space.

  In addition, the player 100 wears the retroreflective sheet 11 on both feet, and the multimedia processor 21 analyzes the movements of both feet, so that more exercise items are provided compared to the case of analyzing only the movement of one foot. Is possible. That is, when only the movement of one leg is analyzed, the step can be detected but the jump cannot be detected. On the other hand, when analyzing the movements of both feet, it is possible to detect not only steps but also jumps. Therefore, an item for causing the player 100 to jump can be added.

  In addition, according to the present embodiment, since the retroreflective sheet 11 is mounted just below the knee, the player 100 steps on the adapter 3 with the cartridge 1 including the imaging unit 17 mounted thereon. When this is done, the retroreflective sheet 11 on both legs can be imaged more reliably in any state.

  Note that the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

  (1) In the above description, the retroreflective sheet 11 is attached to both feet of the player 100 for easy detection. However, depending on the capabilities of the image sensor 32 and the multimedia processor 21, the retroreflective sheet 11 may be necessarily attached. There is no. If the movement of both feet of the player 100 can be analyzed, the retroreflective sheet 11 is not essential.

  (2) In the above description, the type in which the cartridge 1 is mounted on the adapter 3 is adopted. However, these may be configured integrally.

  (3) Although the display device is the television monitor 7 in the above, it is not limited to this.

It is a figure showing the whole exercise support system composition by an embodiment of the invention. It is a perspective view of the cartridge 1 of FIG. It is a figure which shows the mounting state of the input device 5 of FIG. It is a figure which shows the electrical constitution of the cartridge 1 of FIG. It is an illustration figure of the exercise assistance screen displayed on the television monitor of FIG. It is another example figure of the exercise assistance screen displayed on the television monitor 7 of FIG. FIG. 12 is still another example of an exercise support screen displayed on the television monitor 7 of FIG. 1. FIG. 12 is still another example of an exercise support screen displayed on the television monitor 7 of FIG. 1. FIG. 12 is still another example of an exercise support screen displayed on the television monitor 7 of FIG. 1. 5 is a flowchart showing an overall flow of processing by the multimedia processor 21 of FIG. 4. It is a flowchart which shows the flow of the imaging | photography process which is one of the processes which the application program of FIG.10 S3 performs. It is a flowchart which shows the flow of the attention point extraction process which is one of the processes which the application program of FIG.10 S3 performs. It is a flowchart which shows the flow of 2 point | piece extraction processing of step S61 of FIG. It is a flowchart which shows the flow of the left-right determination process which is one of the processes which the application program of FIG.10 S3 performs. It is a flowchart which shows the flow of the step determination process which is one of the processes which the application program of step S3 of FIG. 10 performs. It is a flowchart which shows the flow of the jump determination process which is one of the processes which the application program of step S3 of FIG. 10 performs. It is a state transition diagram of the exercise | movement assistance process which the multimedia processor 21 of FIG. 1 performs. FIG. 18 is a flowchart of an execution routine (time condition) for the Nth section executed in step S257-N in FIG. 17. It is a flowchart which shows the flow of the input response process of step S299 of FIG. FIG. 18 is a flowchart of an execution routine (end of music is an end condition) of the Nth section executed in step S257-N of FIG. FIG. 18 is a flowchart of an execution routine (failure is an end condition) for the Nth section executed in step S257-N in FIG. 17;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cartridge, 3 ... Adapter, 5 ... Input device, 7 ... Television monitor, 11 ... Retroreflective sheet, 15 ... Infrared light emitting diode, 17 ... Imaging unit, 21 ... Multimedia processor, 23 ... External memory, 31 ... Image sensor.

Claims (5)

Image generation means for generating an image for guiding a player to step on;
Imaging means for imaging the first reflector attached to the player's left foot and the second reflector attached to the right foot;
Detection means for detecting the first reflector and the second reflector based on a result of imaging by the imaging means;
Analysis means for analyzing the movement of the first reflector and the movement of the second reflector based on the result of detection by the detection means;
Processing means for executing information processing according to the result of analysis by the analysis means and reflecting the result in the video,
The analysis means includes
Means for calculating a vertical velocity of the first reflector (hereinafter referred to as “first vertical velocity”) in synchronization with a synchronization signal generated at a predetermined time interval ;
When the number of times the first vertical speed exceeds the predetermined value becomes equal to the second predetermined number before the number of times the first vertical speed is equal to or less than the predetermined value is continuously equal to the first predetermined number of times, Means for determining that the step was performed with the left foot;
Means for calculating a vertical velocity of the second reflector (hereinafter referred to as “second vertical velocity”) in synchronization with the synchronization signal ;
Before the second vertical velocity equal to the first predetermined number of times of less than the predetermined value in succession, the number of times that the second vertical velocity exceeds said predetermined value is equal to said second predetermined number of times Means for determining that a step has been performed with the right foot.   The exercise support apparatus according to claim 1, wherein each of the first vertical speed and the second vertical speed is a vertical downward speed. The analysis means includes
Means for determining whether both the first reflector and the second reflector are moving in the vertical direction in synchronization with the synchronization signal;
And a jump determining means for determining that the player has jumped when a state in which both the first reflector and the second reflector are moving in the vertical direction occurs continuously for a third predetermined number of times. The exercise support apparatus according to 1 or 2.   The exercise support apparatus according to claim 3, wherein the vertical direction in the determination by the jump determination unit is a vertical upward direction. A computer program for processing an imaging result by an imaging means for imaging a first reflector mounted on a player's left foot and a second reflector mounted on a right foot and reflecting the result in an image,
Generating an image for guiding the player to step on;
Detecting the first reflector and the second reflector based on the result of imaging by the imaging means;
Analyzing the movement of the first reflector and the movement of the second reflector based on the detection result of the step of detecting;
Reflecting the result of the analysis in the step of analyzing to a video, and causing the computer to execute,
The step of analyzing comprises
Calculating a vertical velocity of the first reflector (hereinafter referred to as “first vertical velocity”) in synchronization with a synchronization signal generated at a predetermined time interval ;
When the number of times the first vertical speed exceeds the predetermined value becomes equal to the second predetermined number before the number of times the first vertical speed is equal to or less than the predetermined value is continuously equal to the first predetermined number of times, Determining that a step has been performed with the left foot;
Calculating a vertical velocity of the second reflector (hereinafter referred to as “second vertical velocity”) in synchronization with the synchronization signal ;
Before the second vertical velocity equal to the first predetermined number of times of less than the predetermined value in succession, the number of times that the second vertical velocity exceeds said predetermined value is equal to said second predetermined number of times And a step of determining that a step has been performed with the right foot.