TWI499943B - Computing system, operation method thereof, and computer program product thereof - Google Patents

Description

Computer system, its operating method and computer program product thereof

The present invention relates to a computer system, a method of operating the same, and a computer program product thereof; more particularly, the present invention relates to a computer system that utilizes optical trajectories to achieve operational objectives, methods of operating the same, and computer program products thereof.

With the rapid development of computers and their surrounding software and hardware, computers and projection devices have been widely used in conferences for briefings (for example, playing briefing files, multimedia files, movies), etc., so that all participants can participate. People can fully understand what the speaker has said.

When using a computer and a projection device for presentations, the speaker often has a need to manipulate the content of the screen projected in the projection area (for example, changing pages, rotating pictures, playing files, etc.). Traditionally, the speaker can control the keyboard or / and the mouse to achieve a variety of different operations; however, when the speaker is far away from the keyboard or / and the mouse, it is inconvenient and easy to operate. The interruption of the briefing process.

In order to overcome the above problems, some manufacturers have designed a projection pen with special functions (for example, page changing function), so that the speaker can achieve the purpose of operating the projected picture content by pressing the special function button on the projection pen. However, if you use this type of projection pen, your computer needs a matching amount. An external wireless communication device to receive a signal from the projection pen in response to the speaker pressing the special function button. Due to the special cost of the projection pen, and the need for additional wireless communication equipment, the user is burdened with the cost of consumption. Furthermore, at any one time, the projection pen can only be used by one person, and therefore, it is impossible to achieve the situation in which multiple people simultaneously operate the screen content.

In view of this, there is still a need in the art for a low-cost technology that enables a speaker to use a computer and a projection device to perform briefings, thereby enabling one or more persons to easily manipulate the content of the screen within the projected area.

In order to solve the problems of the prior art, the present invention provides a computer system, a method of operating the same, and a computer program product thereof.

The computer system provided by the present invention comprises a projection device, an image capture device and a processing device. The projection device forms a projection area when projected. The image capturing device captures an image of the projection area for each of a plurality of time points defined in a time interval, wherein the images have an order according to the time points. The processing device subtracts the two images according to the sequence to obtain a plurality of light spots, and calculates one of the movement information related to the light spots (for example, the moving distance, the moving direction, the moving manner or/or the light spots) And the dwell time of the projection area, and the like, and determining an operation instruction of the computer system according to the movement information (for example, page change, rotation, enlargement, reduction, and the like of the screen content in the projection area).

The method of operating a computer system provided by the present invention operates a computer system comprising an image capture device and a processing device. The method comprises the steps of: (a) capturing, by the image capture device, an image of a projection area, wherein the images have a basis according to the time points of each of the plurality of time points defined in a time interval; a sequence, (b) by the place The processing device subtracts the images according to the order to obtain a plurality of light spots, and (c) calculating, by the processing device, one of the movement information related to the light spots (eg, the moving distance of the light spots, Moving direction, moving mode or/and dwell time of the projection area, etc.), and (d) determining, by the processing device, an operation command according to the movement information (for example, page changing, rotating, and zooming in the content of the screen in the projection area) , zoom out, etc.).

The computer program product provided by the present invention comprises a plurality of program instructions. After the computer program product is loaded via a computer system, the computer system executes the program instructions. The program instructions include program instruction A, program instruction B, program instruction C, and program instruction D. When the program command A is executed, one of the plurality of time points defined in the time interval, the image capturing device of the computer system captures an image of a projection area, wherein the images are based on the time Points have an order. When the program instruction B is executed, one of the processing units of the computer system subtracts the images according to the order to obtain a plurality of spots. When the program command C is executed, the processing device calculates one of the movement information associated with the light spots (eg, the moving distance of the light spots, the moving direction, the moving mode or/and the dwell time of the projected area, etc.). When the program instruction D is executed, the processing device determines an operation instruction according to the movement information (for example, page change, rotation, enlargement, reduction, and the like of the screen content in the projection area).

In the invention, an image capturing device captures one image in a projection area at different time points. Therefore, when the user points to the projection area by a light indicator device (for example, a laser pointer), the images captured by the image capture device may include the light spot projected by the light indicator device. The processing device can obtain a plurality of spots by subtracting the images sequentially (i.e., subtracting each image from the previous image). The light spots can be regarded as one of the light trajectories of the light index device in the projection area. The processing device recalculates with the light spots Turning off one of the mobile information (for example, the moving distance of the light spots, the moving direction, the moving mode or/and the dwell time of the projected area, etc.), and then determining an operating instruction of the computer system according to the moving information (for example : page change, rotation, enlargement, reduction, etc. of the screen content in the projection area). In addition, when a plurality of light indicator devices are directed to the projection area, a plurality of light trajectories can be determined through the foregoing operation mechanism, so as to achieve the purpose of controlling the screen content in the projection area by multiple people.

Other objects of the present invention, as well as the technical means and implementations of the present invention, will be apparent to those skilled in the art in view of the appended claims.

1‧‧‧Computer system

10‧‧‧Projection area

11‧‧‧Image capture device

12‧‧‧ images

13‧‧‧Projector

15‧‧‧Processing device

17‧‧‧Light indicator device

10a‧‧‧Light track

10b‧‧‧Light track

27‧‧‧Light indicator device

20a‧‧‧First light trail

20b‧‧‧second light trail

22a‧‧‧ first first spot

22b‧‧‧ first second spot

24‧‧‧ initial center coordinates

24a‧‧‧First light trail

24b‧‧‧second light trail

25a‧‧‧representing light spots

25b‧‧‧representing light spots

25c‧‧‧representing light spots

26a‧‧‧ first first spot

26b‧‧‧ first second spot

28‧‧‧Center coordinates

21a‧‧‧First light trail

21b‧‧‧second light trail

S301-S307‧‧‧Steps

S401-S407‧‧‧Steps

1A is a diagram showing a computer system 1 of a first embodiment of the present invention; FIG. 1B is a diagram showing a light trace 10a of a first example of the first embodiment; and FIG. 1C is a diagram depicting a light of a second example of the first embodiment. Track 10b; FIG. 2A depicts a second embodiment of the present invention; FIG. 2B depicts a first optical trace 20a and a second optical trace 20b of the first example of the second embodiment; and FIG. 2C depicts a second implementation The first optical trajectory 24a and the second optical trajectory 24b of the second example of the second embodiment; the second optical trajectory 21a and the second optical trajectory 21b of the third example of the second embodiment are depicted; A flowchart of the third embodiment is depicted; and a fourth diagram depicts a flow chart of the fourth embodiment.

The computer system, the method of operating the same, and the computer program product thereof provided by the present invention will be explained below through embodiments. However, the embodiments of the present invention are not intended to limit the invention to any environment, application, or manner as described in the embodiments. Therefore, the description of the embodiments is merely illustrative of the invention and is not intended to limit the invention. It should be noted that in the following embodiments and drawings, elements that are not directly related to the present invention have been omitted and are not shown.

A first embodiment of the present invention is a computer system 1, the architecture of which is depicted in Figure 1A. The computer system 1 includes an image capturing device 11 , a projection device 13 , and a processing device 15 . The processing device 15 is electrically connected to the image capturing device 11 and the projection device 13 . The projection device forms a projection area 10 when projected, and the content of the screen presented by the projection area 10 depends on the file executed by the processing device 15 and/or played. For example, when a user performs a briefing with the computer system 1, the processing device 15 executes a specific briefing file, and a specific page of the one of the briefing files is displayed in the projection area 10.

In this embodiment, the user can operate a light index device (for example, a laser pointer) 17 in various manners to cause the light emitted by the light index device 17 to form various light traces on the projection area 10. Through different light trajectories, the user can perform different operations on the content of the screen presented in the projection area 10.

Specifically, the image capturing device 11 captures an image of the projection area 10 for each of a plurality of time points (not shown) defined in a time interval (not shown), thereby obtaining a plurality of images. Image 12. The image capturing device 11 can capture the image 12 according to its frame per second. Since these images 12 are captured at different points in time, these images 12 have an order depending on the time point at which they are captured.

The processing device 15 then subtracts the images 12 according to the order (ie, will Each image is subtracted from its previous image to obtain a plurality of spots, which can be regarded as a light track. Furthermore, the processing device 15 calculates one of the movement information associated with the light spots, and then determines an operation command of the computer system 1 based on the movement information. Thereafter, the processing device 15 can cause the content of the screen presented in the projection area 10 to be changed accordingly according to the operation instruction.

In the following, different embodiments will be used to illustrate how the present embodiment achieves different operational controls through different optical trajectories.

Referring to FIG. 1B, a light trace 10a of the first example of the embodiment is depicted, and the light trace 10a is formed by the aforementioned light spot. The processing device 15 calculates a first cumulative displacement of all of the spots in a first direction (eg, a horizontal direction) and calculates a second cumulative displacement of all of the spots in a second direction (eg, a vertical direction). Specifically, since the processing device 15 previously subtracts all the images 12 in accordance with the order to obtain a light spot, the obtained light spots also have an order. The processing device 15 can subtract the coordinate positions of the light points two by two according to the order between the light spots (that is, subtract the coordinate position of each light point from the coordinate position of the previous light spot) to obtain the first Cumulative displacement and second cumulative displacement.

In this example, the foregoing movement information includes a first cumulative displacement and a second cumulative displacement; in other words, the processing device 15 determines an operation instruction of the computer system 1 according to the first cumulative displacement and the second cumulative displacement. Next, the processing device 15 determines that the first cumulative displacement is greater than a first threshold and the second cumulative displacement is less than a second threshold. The computer system 1 presets that "the first cumulative displacement is greater than a first threshold and the second cumulative displacement is less than a second threshold" corresponds to an operational command associated with the first direction (eg, within the projection region 10) The screen moves/rolls in the first direction. Therefore, after determining that the first cumulative displacement is greater than a first threshold and the second cumulative displacement is less than a second threshold, the processing device 15 can determine a corresponding operational command. again The computer system 1 is operated by this operation instruction.

Please refer to FIG. 1C, which depicts a light trace 10b of the second example, which is formed by the aforementioned light spots. The second example is identical to the first example, the only difference being that in the second example, the first direction refers to the vertical direction and the second direction refers to the horizontal direction. The computer system 1 may preset that "the first cumulative displacement is greater than a first threshold and the second cumulative displacement is less than a second threshold" corresponds to an operational command associated with the first direction (ie, the vertical direction) (eg, The screen in the projection area 10 is moved/rolled in the vertical direction. Therefore, after determining that the first cumulative displacement is greater than a first threshold and the second cumulative displacement is less than a second threshold, the processing device 15 can determine The computer command system 1 is operated by the corresponding operation command.

Figure 2A depicts a second embodiment of the present invention. The second embodiment of the present invention is also a computer system 1. However, in the present embodiment, the light indicator device (for example, a laser pointer) 27 used by the user includes two illumination sources. The user can operate the light indexing device 27 in various ways to cause the light emitted by the light indexing device 27 to form two light tracks on the projection area 10. Depending on the type of the two light tracks, the user can perform different operations on the content of the picture presented in the projected area 10.

Specifically, the image capturing device 11 captures an image of the projection area 10 for each of a plurality of time points (not shown) defined in a time interval (not shown), thereby obtaining a plurality of images. Image 12. The image capturing device 11 can capture the image 12 according to its screen update rate. Since these images 12 are captured at different points in time, these images 12 have an order depending on the time point at which they are captured.

The processing device 15 further subtracts the images 12 according to the sequence (that is, subtracts each image from the previous image) to obtain a plurality of first spots and a plurality of second lights. Points, these first spots can be regarded as a first light track, and these second spots can be viewed as a second light track. Furthermore, the processing device 15 calculates one of the movement information associated with the first light spot and the second light spot, and then determines an operation command of the computer system 1 based on the movement information. Thereafter, the processing device 15 can cause the content of the screen presented in the projection area 10 to be changed accordingly according to the operation instruction.

In the following, different embodiments will be used to illustrate how the present embodiment achieves different operational controls through different optical trajectories.

Please refer to FIG. 2B, which depicts the first optical track 20a and the second optical track 20b of the first example of the embodiment. The arrows drawn on the first light track 20a and the second light track 20b represent the direction of movement. The first optical trajectory 20a is formed by the aforementioned first light spot, and the second optical trajectory 20b is formed by the aforementioned second light spot. Since the processing device 15 subtracts all the images 12 according to the order to obtain the first spots and the second spots, the first spots have an order, and the second spots are also Has a sequence.

The processing device 15 calculates an initial center of the circle coordinate position 24 using the coordinate position of the first first spot 22a and the coordinate position of the first second spot 22b. For example, the processing device 15 may average the coordinate position of the first first spot 22a and the coordinate position of the first second spot 22b, and the averaged coordinate position is the initial centroid coordinate position 24.

The processing device 15 performs the following operations on each image 12 according to the order between the images 12: (a) using the coordinate position of the first light spot corresponding to the image 12 and the coordinate position of the second light spot corresponding to the image 12 Calculating the coordinate position of the representative light spot of the image, for example, the representative light spot 25c illustrated in FIG. 2B (for example, the processing device 15 may average the coordinate position of the first light spot and the coordinate position of the second light spot To obtain a representative spot 25c), (b) to calculate a temporary center point position (not shown) by using the initial center point position 24 and the coordinate position of the representative spot of the image 12. And (c) calculating a cumulative angle using the temporal center point coordinates and those previously calculated representative spots 25a, 25b.

In this example, the aforementioned movement information is a cumulative angle; in other words, the processing device 15 determines an operation command of the computer system 1 based on the cumulative angle. More specifically, when the processing device 15 determines that the cumulative angle is greater than a threshold, the user desires to draw a circle on the projection area 10 by the light indicator device 27.

The computer system 1 presets that when the user draws a circle in the projection area 10, a specific operation command (for example, rotating the screen content in the projection area 10) is performed. Therefore, when the processing device 15 determines that the accumulated angle is greater than the threshold value, the corresponding specific operation command is determined accordingly, and the computer system 1 is operated by the operation command.

Please refer to FIG. 2C, which depicts the first optical trajectory 24a and the second optical trajectory 24b of the second example of the embodiment. The arrows drawn on the first light track 24a and the second light track 24b represent the direction of movement. The first optical trajectory 24a is formed by the aforementioned first light spot, and the second optical trajectory 24b is formed by the aforementioned second light spot. Since the processing device 15 subtracts all the images 12 according to the order to obtain the first spots and the second spots, the first spots have an order, and the second spots are also Has a sequence.

The processing device 15 first calculates a center coordinate position 28 using the coordinate position of the first first spot 26a and the coordinate position of the first second spot 26b. The processing device 15 performs the following operations on each image 12 according to the order between the images 12: (a) calculating a first point by using the center coordinate position 28 and all of the first light spots before the time point corresponding to the image 12. a cumulative angle, (b) calculating a second cumulative angle using the central coordinate position 28 and all of the second light spots before the time point corresponding to the image 12, and (c) utilizing the first cumulative angle and The second tired At the product angle, a representative angle is calculated (for example, the first cumulative angle and the second cumulative angle are averaged).

In this example, the aforementioned movement information represents a cumulative angle for this purpose; in other words, the processing device 15 determines an operation command of the computer system 1 based on the representative cumulative angle. More specifically, when the processing device 15 determines that the cumulative angle is greater than a threshold, the user desires to draw a circle around the center of the projection area 10 by the light indicator device 27.

The computer system 1 pre-sets a specific operation command (for example, rotating the screen content in the projection area 10) when the user draws a circle around the center of the projection area 10. Therefore, when the processing device 15 determines that the accumulated angle is greater than the threshold value, the corresponding specific operation command is determined accordingly, and the computer system 1 is operated by the operation command.

Please refer to FIGS. 2D and 2E, which depict the first optical trajectory 21a and the second optical trajectory 21b of the third example of the embodiment. The arrows drawn on the first light track 21a and the second light track 21b represent the direction of movement. The first optical trajectory 21a is formed by the aforementioned first light spot, and the second optical trajectory 21b is formed by the aforementioned second light spot. Since the processing device 15 subtracts all the images 12 according to the order to obtain the first spots and the second spots, the first spots have an order, and the second spots are also Has a sequence.

The processing device 15 performs the following operations on each image 12 according to the order between the images 12: calculating a coordinate position between the first light spot corresponding to the image 12 and one of the second light points corresponding to the image 12 distance. The changed state presented by the equidistance according to the sequence is the aforementioned movement information. For example, the change state of the equidistance may be an increment state as shown in FIG. 2D or a decrement state as shown in FIG. 2E.

The computer system 1 is preset to change the state of the equal distance to an incremental state. When a first operation instruction is performed (for example, the display screen in the projection area 10 is enlarged), and when the changed state of the equal distance is a decreasing state, a second operation instruction is performed (for example, the projection area 10 is to be performed). The display screen inside is reduced). Therefore, after the processing device 15 further determines the changed state of the equidistance according to the sequence, the processing device 15 can determine the corresponding operational command, and then operate the computer system 1 with the operational command.

In the fourth example of the embodiment, the movement information used to determine the operation command of the computer system 1 is the number of times the first light spot and the second light spot are flashed in the time interval (for example: once , two or more times).

The technique by which the processing device 15 judges that the spot is blinking once is exemplified. When the processing device 15 determines that the first light spots are continuously present in a sub-area of the projection area 10 for more than a predetermined length of time, and the moving distance of the first light points within the preset time length does not exceed When the average coordinate value of the first light spots is used as one of the center threshold thresholds, the first light spots are flashed once. The processing device 15 can also use the same technique to determine whether the second spots are blinking once.

Further, the technique of the processing device 15 for judging the spot flashing twice will be exemplified. The processing device 15 first determines that the first light spots are blinking once in the technique described in the previous paragraph. Next, the processing device 15 determines that the first light spots disappear on the projection area 10 to reach a time threshold, and then determines that the first light spots are blinking once. In the foregoing manner, the processing device 15 determines that the first spots actually flash cumulatively twice. The processing device 15 can also use the same technique to determine whether the second spots are blinking twice.

The computer system 1 presets which operation commands are respectively corresponding to when the first light spot and the second light spots flash once, twice or more times in the time interval (for example: Switch the function). Therefore, the processing device 15 can subsequently determine the corresponding operation command according to the number of times the first light spot and the second light spot flash, and then operate the computer system 1 by using the operation command.

A third embodiment of the present invention is a method of operating a computer system (e.g., the first embodiment and the computer system 1 of the second embodiment), the flow chart of which is depicted in Figure 3. The computer system includes an image capture device and a processing device.

First, the method performs step S301, in which one image of a projection area is captured by the image capturing device for each of the plurality of time points defined in a time interval. Since the time points have an order, the images also have the same order according to the time points. Then, in step S303, the images are subtracted by the processing device according to the order to obtain a plurality of spots. In step S305, the processing device calculates one of the movement information related to the light spots. In the subsequent step S307, the processing device determines an operation command according to the movement information.

For example, the foregoing step S305 may be performed by the processing device to calculate a first cumulative displacement of the light spots in one of the first directions, and calculate a second cumulative displacement of the light spots in one of the second directions. The aforementioned movement information includes the first cumulative displacement and the second cumulative displacement. In addition, the step S307 may be determined by the processing device that the first cumulative displacement is greater than a first threshold, and the second cumulative displacement is determined to be less than a second threshold, and then the operation command is determined according to the two determination results. A direction related instruction.

In addition to the foregoing steps, the third embodiment can perform all of the operations and functions of the first embodiment. Those skilled in the art can directly understand how the third embodiment performs such operations and functions based on the first two embodiments described above, and thus will not be described again.

A fourth embodiment of the present invention is a method of operating a computer system (e.g., the first embodiment and the computer system 1 of the second embodiment), the flow chart of which is depicted in FIG. The computer system includes an image capture device and a processing device.

First, the method performs step S401. Each of the plurality of time points defined in a time interval captures an image of a projection area by the image capturing device. Since the time points have an order, the images also have the same order according to the time points. Then, in step S403, the image is subtracted by the processing device according to the sequence to obtain a plurality of first spots and a plurality of second spots. In step S405, the processing device calculates one of the movement information associated with the first light spot and the second light spots. In step S407, the processing device determines an operation command according to the movement information.

For example, the foregoing step S405 may first calculate an initial center by the processing device using a coordinate position of the first one of the first light points and a coordinate position of the first one of the second light points. At the coordinate position, the processing device performs the following steps for each of the images according to the sequence: (a) the processing device uses a coordinate position of the first light spot corresponding to the image and the image corresponding to the image One coordinate position of the two light spots, one of the images is calculated to represent a coordinate position of the light spot, and (b) a temporary center coordinate position is calculated by using the initial center coordinate position and the coordinate position of the representative light spot of the image, And (c) calculating a cumulative angle using the temporary centroid coordinate position and the representative light spots, wherein the movement information is the cumulative angle. The foregoing step S407 can be determined by the processing device according to the accumulated angle.

For example, the foregoing step S405 may first calculate, by the processing device, a center of a coordinate position of the first one of the first light points and a coordinate position of the first one of the second light points. The coordinate position, and then the processing device according to the sequence, for each of the images Performing the following steps: (a) calculating, by the processing device, a first cumulative angle by using the central coordinate position and all of the first light spots before the time point corresponding to the image, and (b) utilizing by the processing device Calculating a second cumulative angle by the center coordinate position and all of the second light spots before the time point corresponding to the image, and (c) utilizing the first cumulative angle and the second cumulative angle by the processing device Calculate a representative cumulative angle. The foregoing step S407 can be determined by the processing device according to the representative cumulative angle.

For example, in the foregoing step S405, the processing device may perform the following steps for each of the images according to the sequence: the processing device calculates a coordinate position of the first light spot corresponding to the image and the image corresponding to the image One of the distances between the coordinates of one of the second spots. Step S405 may further determine, by the processing device, that the equidistance belongs to an increment state or a decrement state, wherein the movement information is that the equidistance is in the increment state or the decrement state. The foregoing step S407 can be determined by the processing device according to the increment state or the decrement state.

For example, the foregoing step S405 can use the techniques described in the foregoing second embodiment to determine the number of times the first light spot and the second light spot are blinked. In this manner, the mobile generated in step S405 is calculated. The information may be that the first spot of light flashes once within the time interval and the second spot of light flashes once within the time interval. The foregoing step S407 can be determined by the processing device according to the calculation result of step S405. For example, the movement information calculated in the foregoing step S405 may be that the first light spots flash twice in the time interval and the second light spots flash twice in the time interval. The foregoing step S407 can be determined by the processing device according to the calculation result of step S405.

In addition to the foregoing steps, the fourth embodiment can perform all of the operations and functions of the second embodiment. Those skilled in the art can directly understand how the fourth embodiment is based. The above second embodiment is used to perform such operations and functions, and thus will not be described again.

Furthermore, the methods described in the third and fourth embodiments can be implemented by a computer program product. After a computer system loads the computer program product, the computer system executes the plurality of program instructions included in the computer program product, and then the methods described in the third and fourth embodiments are completed. The aforementioned computer program product can be a file that can be transmitted over the network, or can be stored in a computer readable recording medium, such as a read only memory (ROM), a flash memory, a floppy disk, A hard disk, a compact disc, a flash drive, a magnetic tape, a database accessible by the Internet, or any other storage medium known to those skilled in the art and having the same function.

It can be seen from the foregoing embodiments that the image capturing device captures one image in a projection area at different time points. Therefore, when the user points to the projection area by a light indicator device (for example, a laser pointer), the images captured by the image capture device may include the light spot projected by the light indicator device. The processing device can obtain a plurality of spots by subtracting the images sequentially (i.e., subtracting each image from the previous image). The light spots can be regarded as one of the light trajectories of the light index device in the projection area. The processing device further calculates one of the movement information (eg, distance, direction, mode, etc.) associated with the light spots, and then determines an operation instruction of the computer system according to the movement information (eg, in the projection area) The content of the screen is changed, rotated, etc.). In addition, when a plurality of light indicator devices are directed to the projection area, a plurality of light trajectories can be determined through the foregoing operation mechanism, so as to achieve the purpose of controlling the screen content in the projection area by multiple people.

The embodiments described above are only intended to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any arrangement that changes or equals can be easily accomplished by those skilled in the art is within the scope of the invention as claimed. The scope of protection shall be subject to the scope of patent application.

S401-S407‧‧‧Steps

Claims (9)

A computer system comprising: a projection device for forming a projection area during projection; and an image capture device for capturing an image of the projection area for each of a plurality of time points defined in a time interval, wherein The images have an order according to the time points; and a processing device that subtracts the images according to the order to obtain a plurality of first spots and a plurality of second spots, using the first lights Calculating an initial centroid coordinate position by one of the coordinate positions of the first one of the points and the coordinate position of the first one of the second light points; wherein the processing device performs the following for each of the images according to the sequence Operation: using one coordinate position of the first light spot corresponding to the image and a coordinate position of the second light spot corresponding to the image, calculating a coordinate position of one of the light spots representing the light spot, using the initial center Calculating a temporary centroid coordinate position by using the coordinate position of the coordinates and the coordinate position of the representative light spot of the image, and calculating a cumulative angle by using the temporary centroid coordinate position and the representative light spots Wherein the processing means further determines a cumulative angle according to the operation instruction. A method of operating a computer system, the computer system comprising an image capture device and a processing device, the method comprising the steps of: (a) each of the plurality of first time points defined in a first time interval, the image capturing device capturing a first image of a projection area, wherein the first images are based on the first a time point has a first order; (b) the first image is subtracted by the processing device according to the first order to obtain a plurality of first light spots and a plurality of second light spots; Calculating an initial center of the circle coordinate position by the processing device using a coordinate position of the first one of the first light points and a coordinate position of the first one of the second light points; (d) The processing device performs the following steps for each of the first images according to the first sequence: (d1) using, by the processing device, a coordinate position of the first light spot corresponding to the first image and a corresponding image of the first image a coordinate position of the second light spot, calculating one of the first images representing a coordinate position of the light spot; (d2) utilizing the initial center coordinate position of the first light point and the representative light spot of the first image Coordinate position, calculating a temporary centroid coordinate position; and (d3) by the Processing means using the coordinate positions of the center and the temporary representative of such spot, calculating a cumulative angle; and (e) determining a first cumulative operation command according to the angle formed by the processing means. The method of claim 2, further comprising the steps of: (f) capturing, by the image capturing device, one of the plurality of second time points defined in a second time interval; a second image, wherein the second images have a second order according to the second time points; (g) the second image is subtracted by the processing device according to the second order to obtain a plurality of a third light spot; (h) calculating, by the processing device, a first cumulative displacement of the third light spot in a first direction; (i) calculating, by the processing device, the third light spot in a second direction a second cumulative displacement; (j) determining, by the processing device, that the first cumulative displacement is greater than a first threshold; (k) determining, by the processing device, that the second cumulative displacement is less than a second threshold; and (l) And determining, by the processing device, a second operation instruction according to the determination result of the step (j) and the step (k), wherein the second operation instruction is an instruction related to the first direction. A method of operating a computer system, the computer system comprising an image capture device and a processing device, the method comprising the steps of: (a) each of a plurality of time points defined in a first time interval, The image capturing device captures a first image of a projection area, The first image has a first order according to the first time points; (b) the first image is subtracted by the processing device according to the first sequence to obtain a plurality of first spots and plural numbers a second spot; (c) calculating, by the processing device, a coordinate of a coordinate of a first one of the first spots and a coordinate position of a first one of the second spots Position (d), by the processing device, performing the following steps for each of the first images according to the first sequence: (d1) using, by the processing device, the center coordinate position and the first time point corresponding to the first image Calculating a first cumulative angle for all of the first first light spots; (d2) utilizing the central coordinate position of the center point and all of the second light before the first time point corresponding to the first image by the processing device Pointing, calculating a second cumulative angle; and (d3) calculating, by the processing device, the first cumulative angle and the second cumulative angle, a representative cumulative angle; and (e) determining, by the processing device, the representative cumulative angle A first operational instruction. The method of claim 4, further comprising the step of: (f) capturing, by the image capturing device, one of the plurality of second time points defined in a second time interval Second shadow The second image has a second order according to the second time points; (g) the second image is subtracted by the processing device according to the second order to obtain a plurality of third images. a light spot and a plurality of fourth light spots; (h) calculating, by the processing device, one of movement information related to the third light spot and the fourth light spots, wherein the movement information is the third light spot Flashing once in the second time interval and blinking the fourth light spot once in the second time interval; and (i) determining, by the processing device, a second operational command based on the movement information. The method of claim 4, further comprising the step of: (f) capturing, by the image capturing device, one of the plurality of second time points defined in a second time interval a second image, wherein the second images have a second order according to the second time points; (g) the second image is subtracted by the processing device according to the second order to obtain a plurality of a third light spot and a plurality of fourth light spots; (h) calculating, by the processing device, one of movement information related to the third light spot and the fourth light spots, wherein the movement information is the third light spot Flashing twice in the second time interval and the fourth light spots flashing twice in the second time interval; (i) determining, by the processing device, a second operational command based on the movement information. The method of claim 4, further comprising the steps of: (f) capturing, by the image capturing device, one of the plurality of second time points defined in a second time interval a second image, wherein the second images have a second order according to the second time points; (g) the second image is subtracted by the processing device according to the second order to obtain a plurality of a third light spot and a plurality of fourth light spots; (h) the processing device performs the following steps for each of the second images according to the second sequence: the processing device calculates the third image corresponding to the second image a distance between a coordinate position of one of the light spots and a coordinate position of the fourth light spot corresponding to the second image; (i) the processing device determines that the equidistance belongs to an incremental state; and (j) The processing device determines a second operational command according to the incremental state. The method of claim 4, further comprising the steps of: (f) capturing, by the image capturing device, one of the plurality of second time points defined in a second time interval a second image, wherein the second images have a second order according to the second time points; (g) the second image is subtracted by the processing device according to the second sequence to obtain a plurality of third spots and a plurality of fourth spots; (h) by the processing device according to the second In sequence, the following steps are performed for each of the second images: the processing device calculates a coordinate position of the third spot corresponding to the second image and a coordinate position of the fourth spot corresponding to the second image One of the distances; (i) the processing device determines that the equidistance belongs to a decreasing state; and (j) determines, by the processing device, a second operational command based on the decreasing state. A computer program product, after loading the computer program product via a computer system, the computer system executes a plurality of program instructions included in the computer program product, the program instructions including: program instruction A, defined in a time interval Each of the plurality of time points captures an image of a projection area by an image capture device of the computer system, wherein the images have an order according to the time points; the program instruction B is one of the computer systems The processing device subtracts the images according to the sequence to obtain a plurality of first spots and a plurality of second spots; the program command C, the first of the first spots is utilized by the processing device Calculating a circle center coordinate position by one coordinate position and one coordinate position of the first one of the second light points; The program instruction D, by the processing device, performs the following operations for each of the images according to the sequence: the processing device uses the center coordinate position and all of the first light spots before the time point corresponding to the image to calculate one a first cumulative angle; a second accumulation angle is calculated by the processing device using the central coordinate position and all of the second light spots before the time point corresponding to the image; and the first accumulation is utilized by the processing device The angle and the second cumulative angle calculate a cumulative angle; and the program command E, and the processing device determines an operation command according to the representative cumulative angle.