CN101947385A - Method for acquiring collision relationship and complete movement trail of billiards in snooker movement - Google Patents
Method for acquiring collision relationship and complete movement trail of billiards in snooker movement Download PDFInfo
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- CN101947385A CN101947385A CN 201010506981 CN201010506981A CN101947385A CN 101947385 A CN101947385 A CN 101947385A CN 201010506981 CN201010506981 CN 201010506981 CN 201010506981 A CN201010506981 A CN 201010506981A CN 101947385 A CN101947385 A CN 101947385A
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Abstract
The invention relates to a method for acquiring a collision relationship and a complete movement trail of billiards in snooker movement, which comprises the following steps of: acquiring successive frame images of the snooker movement, determining a surface coordinate position of each billiard of each of the frame images, and correcting the movement trail of collision points of the billiards in the movement trail of each billiard; and in the successive frame, judging whether a direction of the movement trail of the current billiard of the current frame is changed or not according to the change of the coordinate position of the movement trail of each billiard, if the direction is changed, judging the collision relationship, and correcting the coordinate of the current billiard at the collision points. The method has the advantages that: according to the disperse billiard position of the adjacent frames, the complete movement trail of the billiards is drawn in real time; data concerned in a match are given to help athletes analyze the direction and the intensity of stroke and help the athletes improve billiard level; and accurate data are provided and comprise a first collision sphere after the athlete hits the billiard, hazard and a pocket position, the out-of-bound billiard, and a hitting distance of the athlete.
Description
Technical field
The area of computer aided that the present invention relates to be applied to the sports field is obtained the method for billiard movement track, relates to a kind of method of obtaining billiard ball collision relation and entire motion track in the Snooker motion in particular.
Background technology
Snooker (Snooker) billiard ball and American billiard ball are sports that extensively welcome by people, also are simultaneously the events of important sports events such as the Asian Games, international occupation match, demonstrate increasing physical culture glamour.Often hold various contests both at home and abroad, in order to improve athletic level, often to do the statistics of some technical data to the ball that the sportsman hits, particularly want the movement locus of tracking ball, help the sportsman to analyze direction of stroke, dynamics, help the sportsman to improve sports level.Judge the visual judge's of traditional referee who always continues to use method in order to improve the snooker match at present, develop a kind of computer and judged scoring system automatically, though utilize the movement locus that this system can tracking ball, but because system adopts is the camera technology of finding a view, common camera collection is per second 25 frames, what gather is the image sequence that disperses, the point of impingement of the point of impingement of ball and ball, ball and Bian Ku often gather less than, therefore can not obtain real complete movement locus, also can not effectively analyze the collision relation of each ball of table top.
Summary of the invention
The objective of the invention is to propose a kind of method of obtaining billiard ball collision relation and entire motion track in the Snooker motion, this method is depicted the original motion track of billiard movement at first according to the discrete billiard ball position of consecutive frame; According to the movement locus analysis collision relation of ball, the billiard movement track is proofreaied and correct, adjusts, is depicted the entire motion track of billiard movement then; Provide some data of paying close attention in the match, comprising: first collision ball after sportsman's batting, pocket ball and sack position, out-of-bounds ball, athletic hitting distance.
Technical scheme of the present invention is that a kind of method of obtaining billiard ball collision relation and entire motion track in the Snooker motion comprises: obtain the sequential frame image of bar snooker motion, determine the table top plane coordinates position of each billiard ball in each two field picture; Wherein, long limit, storehouse, billiard table table top limit is that X-axis, minor face are Y-axis, and the billiard ball coordinate is a billiard ball centre point coordinate; According to the plane coordinates of each billiard ball in every two field picture, obtain each billiard movement track; Wherein, described obtaining in each billiard movement track the movement locus of the billiard ball point of impingement is revised, the step of described correction comprises:
A, determine the characteristic value of the coordinate position point of each billiard ball in each two field picture, described characteristic value comprises: the straight line that each billiard ball present frame coordinate points and former frame coordinate points constitute is at the difference between the X coordinate of the slope of X-axis, two coordinate points, the angle of air line distance, straight line and X-axis positive direction of difference, two coordinate points between the Y coordinate;
B, in successive frame, variation according to the movement locus position coordinates of each billiard ball, whether the judgement present frame changes when the movement locus direction of forecourt, if change, judge that at first present frame works as forecourt and whether with other billiard ball collision is arranged, determine the point of impingement, revise the coordinate of current billiard ball at the point of impingement if any collision; As collisionless, judge whether present frame has collision with storehouse, table top limit when forecourt, determine the point of impingement, revise the coordinate of current billiard ball if any collision at the point of impingement;
Describedly judge that whether present frame has collision to be with other billiard ball when forecourt:
If the movement locus direction of the current billiard ball of b1 present frame changes, judge that other billiard ball change the distance of the movement locus straight line of the preceding coordinate of direction to current billiard ball;
B11, with the diameter of distance and billiard ball relatively is if distance is less than the billiard ball diameter, then on the movement locus of these billiard ball before current billiard ball change direction;
B12, judge whether these billiard ball have the change of the direction of motion at next frame;
B13, change, then these billiard ball are the collision billiard ball, and present frame is the collision frame, provide the coordinate of collision billiard ball when the collision frame;
B14, obtain the coordinate of current billiard ball at the point of impingement, the slope that is about in described current billiard ball present frame coordinate points and this coordinate points characteristic value constitutes straight line A, obtain through the vertical line B of collision spherical coordinates by straight line A perpendicular to straight line A, obtain the intersecting point coordinate of straight line A and vertical line B, on straight line A, obtain a new virtual billiard ball coordinate points of colliding ball of being close to by intersecting point coordinate and collision billiard ball at the coordinate of collision during frame, determine that this new coordinate points is current billiard ball point of impingement coordinate;
Describedly judge that whether present frame has collision to be with storehouse, table top limit when forecourt:
Whether b2, judgement two continuous frames change when the direction of the movement locus of forecourt;
If b21 changes, then current billiard ball collision storehouse, limit, present frame collides frame exactly;
Do you b22, judge that angle difference absolute value in the current billiard ball two continuous frames characteristic value is greater than the threshold limit value of the movement locus coordinate of revising current billiard ball? be, then obtain current billiard ball point of impingement coordinate: promptly by the slope of current billiard ball present frame coordinate in the characteristic value and the slope of next frame coordinate, obtain respectively through the linear equation of present frame coordinate points and the linear equation of process next frame coordinate points, obtain the intersecting point coordinate of two straight lines, determine that this intersecting point coordinate is point of impingement coordinate.
The threshold limit value of the movement locus coordinate of the current billiard ball of described correction is 20.
The described method of obtaining billiard ball collision relation and entire motion track in the Snooker motion further includes:
Determine the distance of mother bulb from the start frame coordinate to the collision frame coordinate; The ball of promptly determining first motion in all balls of table top is a mother bulb, and it is first collision ball of mother bulb that the billiard ball that impacted by mother bulb are defined as, thereby obtains the distance of mother bulb from the start frame coordinate to the collision frame coordinate.
The described method of obtaining billiard ball collision relation and entire motion track in the Snooker motion further includes:
Determine to pocket ball or out-of-bounds ball promptly according to the movement locus of each ball in the billiard ball, are zero ball be defined as pocketing ball or out-of-bounds ball for the last frame coordinate, and concrete steps are:
G1, determine current billiard ball in the end the coordinate in the two field picture be zero;
G2, begin to seek the non-vanishing nearest frame of coordinate figure, provide when the coordinate figure of forecourt at this frame toward first frame direction from last frame;
The coordinate at the coordinate figure of g3, described this frame and 6 sack two ends constitutes two straight lines respectively, and described two straight lines and X-axis form angle angle1 and angle angle2 respectively, calculates the movement locus straight line of current billiard ball and the angle angle of X-axis;
If g4 angle angle is between the angle angle1 and angle angle2 of one of them sack in 6 sacks, determine that then this sack is the sack that pockets of ball of pocketing, these billiard ball are the ball that pockets, otherwise these billiard ball are the out-of-bounds ball.
The invention has the beneficial effects as follows: according to the discrete billiard ball position of consecutive frame, real-time depiction goes out the entire motion track of billiard movement; Movement locus analysis collision relation according to ball, provide some data of more paying close attention in the match, for helping the sportsman to analyze direction of stroke, dynamics, help the sportsman to improve sports level accurate data is provided: comprising: first collision ball after sportsman's batting, ball and sack position pocket, the out-of-bounds ball, athletic hitting distance.And automatic assistant judge's score of computer and automaticdata statistics, reserve judge's score have been realized based on above-mentioned data.
Below in conjunction with drawings and Examples the present invention is described in detail.
Description of drawings
Fig. 1 is a flow chart of steps of the present invention;
Fig. 2 is billiard ball of the present invention and billiard ball collision, current billiard ball point of impingement coordinate correction schematic diagram;
Fig. 3 is billiard ball of the present invention and the collision of storehouse, limit, current billiard ball point of impingement coordinate correction schematic diagram;
Fig. 4 is the billiard ball of the present invention differentiation schematic diagram that pockets;
When Fig. 5 does not revise the point of impingement for the present invention, the movement locus schematic diagram of current spherical coordinates;
After Fig. 6 is the correction point of impingement of the present invention, the movement locus schematic diagram of current spherical coordinates.
The specific embodiment
Embodiment
A kind of method embodiment that in the Snooker motion, obtains billiard ball collision relation and entire motion track, referring to Fig. 1 to Fig. 6, this method is based on an area of computer aided judgment system, and described system comprises camera, Snooker table, video collector and computer; Described camera is installed on the top at snooker table surface center, the maximum visual angle of camera contains covers the billiard table table top, and the video output of camera is connected to video collector, and video collector is connected to computer, system is according to the camera pixel and the billiard table sized data of input, the billiard table table top is converted into a known plane coordinate system, and according to the rule of snooker, the sportsman impacts red ball earlier, if red hazard, then impact colour ball, otherwise, then change next sportsman and play ball.If there is not red ball on the table top, then impact colour ball according to yellow, green, brown, blue, powder, black order, the foundation of coordinate system as shown in Figure 4, the O point is the origin of coordinates (0,0), X-axis is that the long limit 1-1 in storehouse, billiard table table top 1 limit, Y-axis are storehouse, billiard table table top limit minor face 1-2.
Described a kind of method of obtaining billiard ball collision relation and entire motion track in the Snooker motion comprises: obtain the sequential frame image of bar snooker motion, determine the table top plane coordinates position of each billiard ball in each two field picture; Wherein, long limit, storehouse, billiard table table top limit is that X-axis, minor face are Y-axis, and the billiard ball coordinate is a billiard ball centre point coordinate; According to the plane coordinates of each billiard ball in every two field picture, obtain each billiard movement track; Because what gather is the image sequence that disperses, the point of impingement of the point of impingement of ball and ball, ball and Bian Ku often gather less than, thereby the movement locus of billiard ball shows to come out at the point of impingement constantly, so revise the coordinate of the point of impingement, additional complete movement locus, the movement locus except the point of impingement does not need to revise;
Therefore described obtaining in each billiard movement track comprises billiard ball collision relation and obtaining of movement locus:
A, determine the characteristic value of the coordinate position point of each billiard ball in each two field picture, described characteristic value comprises: the straight line that each billiard ball present frame coordinate points and former frame coordinate points constitute is at the difference between the X coordinate of the slope of X-axis, two coordinate points, the angle of air line distance, straight line and X-axis positive direction of difference, two coordinate points between the Y coordinate;
B, in successive frame, variation according to the original motion track position coordinate of each billiard ball, whether the judgement present frame changes when the movement locus direction of forecourt, if change, judge that at first present frame works as forecourt and whether with other billiard ball collision is arranged, determine the point of impingement, revise the coordinate of current billiard ball at the point of impingement if any collision; As collisionless, judge whether present frame has collision with storehouse, table top limit when forecourt, determine the point of impingement, revise the coordinate of current billiard ball if any collision at the point of impingement;
Describedly judge that whether present frame has collision to be with other billiard ball when forecourt:
If the movement locus direction of the current billiard ball of b1 present frame changes, judge that other billiard ball change the distance of the movement locus straight line of the preceding coordinate of direction to current billiard ball;
B11, with the diameter of distance and billiard ball relatively is if distance is less than the billiard ball diameter, then on the movement locus of these billiard ball before current billiard ball change direction;
B12, judge whether these billiard ball have the change of the direction of motion at next frame;
B13, change, then these billiard ball are the collision billiard ball, and present frame is the collision frame, provide the coordinate of collision billiard ball when the collision frame;
B14, obtain the coordinate of current billiard ball at the point of impingement, as shown in Figure 2, the slope that is about in described current billiard ball 2 present frame coordinate points and this coordinate points characteristic value constitutes straight line A, obtain through the vertical line B of collision ball 3 coordinates by straight line A perpendicular to straight line A, obtain the intersecting point coordinate O of straight line A and vertical line B, coordinate when colliding frame obtains a new coordinate points C who is close to the virtual billiard ball 4 that collide ball on straight line A by intersecting point coordinate and collision billiard ball, determines that this new coordinate points C is current billiard ball point of impingement coordinate;
Describedly judge that whether present frame has collision to be with storehouse, table top limit when forecourt:
Whether b2, judgement two continuous frames change when the direction of the movement locus of forecourt;
If b21 changes, then current billiard ball collision storehouse, limit, present frame collides frame exactly;
Do you b22, judge that angle difference absolute value in the current billiard ball two continuous frames characteristic value is greater than the threshold limit value of the movement locus coordinate of revising current billiard ball? be, then obtain current billiard ball point of impingement coordinate: as shown in Figure 3, promptly by the slope of current billiard ball present frame coordinate in the characteristic value and the slope of next frame coordinate, obtain respectively through the linear equation f1 of present frame coordinate points and the linear equation f2 of process next frame coordinate points, obtain the intersecting point coordinate f of two straight lines, determine that this intersecting point coordinate is point of impingement coordinate.
The threshold limit value of the movement locus coordinate of the current billiard ball of described correction is 20.
The described method of obtaining billiard ball collision relation and entire motion track in the Snooker motion further includes:
Determine the distance of mother bulb from the start frame coordinate to the collision frame coordinate; The ball of promptly determining first motion in all balls of table top is a mother bulb, and it is first collision ball of mother bulb that the billiard ball that impacted by mother bulb are defined as, thereby obtains the distance of mother bulb from the start frame coordinate to the collision frame coordinate.
The described method of obtaining billiard ball collision relation and entire motion track in the Snooker motion further includes:
Determine to pocket ball or out-of-bounds ball promptly according to the movement locus of each ball in the billiard ball, are zero ball be defined as pocketing ball or out-of-bounds ball for the last frame coordinate, and concrete steps are:
G1, determine current billiard ball in the end the coordinate in the two field picture be zero;
G2, begin to seek the non-vanishing nearest frame of coordinate figure, provide when the coordinate figure of forecourt at this frame toward first frame direction from last frame;
The coordinate at the coordinate figure of g3, described this frame and 6 sack two ends constitutes two straight lines respectively, and described two straight lines and X-axis form angle angle1 and angle angle2 respectively, calculates the movement locus straight line of current billiard ball and the angle angle of X-axis;
If g4 angle angle is between the angle angle1 and angle angle2 of one of them sack in 6 sacks, determine that then this sack is the sack that pockets of ball of pocketing, these billiard ball are the ball that pockets, otherwise these billiard ball are the out-of-bounds ball.
The present embodiment specific procedure is carried out:
The position coordinates string pResult of respective frame in A, the first reading database resolves the table top coordinate that obtains ball.PResult string value is the coordinate string that contains each spherical coordinates that is generated by the automatic station-keeping system that system carries, and passes in the database, only needs directly to read with program.
Before A1, the parsing, the colour ball numbering is respectively C31-C37 by yellow ball, green ball, brown ball, basketball, the sphere of powder, black ball in pResult coordinate string, and red ball is numbered R11-R25, and the numbering of Archon is W10.
A2, parsing back colour ball numbering convert 0-5 to corresponding to the C31-C37 order, and coordinate figure is constant.Red ball numbering converts 6-20 to corresponding to the R11-R25 order, and coordinate figure is constant.The Archon numbering converts 21 to by W10, and coordinate figure is constant.Such conversion is to write for program is easier and realize.
B, writing and realizing, the characteristic value of needs calculating each point and relevant flag information for program.
B1, calculate the characteristic value of the coordinate position of each billiard ball in each two field picture, its characteristic value comprises:
Suppose mother bulb the coordinate of the 4th frame for (x1, y1), be at the coordinate of the 3rd two field picture (x2, y2) then
Mother bulb in the characteristic value of the point of the 4th frame is:
，
The explanation of the flag bit of the movement locus intensity of variation of B2, each billiard ball:
This flag bit is Change_flag, supposes that the characteristic value of coordinate of two adjacent points of current billiard ball is: angle1, and angle2, x_diff, y_fiff, then:
C, according to the table top coordinate of the billiard ball that read in, change and position coordinates according to the original motion track of each ball, analyze it and whether collide storehouse, limit or ball, and calculate its point of impingement.
The crash analysis of C1, ball and ball: determine the collision relation of ball and ball, first of mother bulb collides ball, obtains the coordinate of the point of impingement; Specific procedure is implemented as:
Calculate characteristic value when forecourt present frame point, when the movement locus direction of ball changes, be the Change_falg of this point〉0, does discriminant function Is_it_coll_a_ball have value to return? Is_it_coll_a_ball calculates the distance of the coordinate of all billiard ball to movement locus straight line before the forecourt collision in the function of program, the diameter of this distance and snooker is compared, if distance is less than bulb diameter, this ball is on the movement locus before the forecourt collision, might be the collision ball, next judge that whether the ball that might collide is in the place ahead when forecourt, and whether this ball has the change of movement locus direction at next frame, if top condition satisfies, then function Is_it_coll_a_ball returns numerical value 1, those billiard ball that satisfy condition in function are exactly the collision ball when forecourt, at this moment, calculate the coordinate of the ball and the ball point of impingement by the slope of this point and this point, and to revise current point be the point of impingement, as shown in Figure 2: establish current billiard ball 2 and be Archon, billiard ball 3 are the collision ball, Archon 2 when dotted line billiard ball 4 are virtual collision, the linear equation of the straight line A of the movement locus of current billiard ball is line1, calculate the slope of the vertical line of movement locus straight line by the slope meter of the movement locus before the collision, the linear equation line2 of the vertical line B of process collision ball, calculate the vertical point of intersection point o(of two straight lines), thereby calculating when the distance of the current point of forecourt (a) to the point (o) that hangs down | the coordinate (b) of ao| and collision ball is to the distance of the point (o) that hangs down | bo|, then the point of impingement (c) to the coordinate of the point (o) that hangs down is | co|, and then calculate the coordinate that coordinate that c orders is the point of impingement;
When function Is_it_coll_a_ball returns numerical value 0, do not collide ball, do not need to revise the point of impingement.If working as forecourt is under the situation of mother bulb, the collision ball of then obtaining just is first collision ball of mother bulb.
The crash analysis in C2, ball and table top bag storehouse: determine the collision relation in ball and table top bag storehouse, seek the point of impingement of missing, revise the point of impingement; The specific procedure implementation is:
=1.
Calculate i+1 point and i+2 point characteristic value angle, if the absolute value of 2 angle difference is greater than 20, then current billiard ball collision stage flour bag storehouse but necessarily missed the point of impingement, by this point and the following point of impingement that a bit calculates, and to revise current point be the point of impingement: referring to Fig. 3, by the slope of current some j in the characteristic value and the slope of a following k, the linear equation f1 of the current point of calculating process respectively and process be the linear equation f2 of any down, calculate the intersection point f of two straight lines, the dotted line m among the figure is the track before not revising; If the x coordinate of intersection point is a positive number and less than the length on long limit, the y coordinate is a positive number and less than the length of minor face, then this intersection point is the point of impingement; Otherwise correcting mistakes of point reverts to original value.
Fig. 5 and Fig. 6 have illustrated to revise the movement locus of the two kinds of situations in front and back when forecourt.
D, calculate athletic hitting distance, i.e. the distance of mother bulb from start frame to the collision frame.
E, according to the movement locus trend of each ball, be zero ball for the last frame coordinate, search for the non-vanishing nearest frame of its coordinate forward, calculate this frame coordinate and each sack two ends coordinate
The straight line that constitutes and the angle of X positive axis, the ball of determining to pocket, pocket ball sack and out-of-bounds ball, program process:
Determine when forecourt in the end the coordinate in the two field picture be zero and be to be in the state of pocketing (L), out-of-bounds state (W);
Begin to seek the non-vanishing nearest frame of coordinate figure from last frame toward first frame direction, provide when the coordinate figure of forecourt at this frame, judge the coordinate figure of this point in the program with circulation, as long as the x coordinate of an object ball or y coordinate greater than zero, circulate just by break;
Calculate the coordinate at this point and 6 sack two ends respectively
The straight line that constitutes and angle angle1, the angle2 of X positive axis, calculate the movement locus straight line of billiard ball and the angle angle of X positive axis, referring to shown in Figure 4,6 sack u are labeled as 1,2,3,4,5,6 respectively, the coordinate points that is labeled as 1 sack two ends is b(0,52.5) and c (52.5,0).At first calculate in the program: the characteristic value angle of the preceding coordinate points a that pockets that judges, calculate this coordinate points a and the straight line of some b, c formation and angle angle1, the angle2 of x positive axis again.If the size of angle is between angle1, the angle2, be angle angle greater than angle1, determine then that less than angle2 sack u1 is the sack that pockets of ball of pocketing, otherwise, the straight line that the coordinate points at the two ends of coordinates computed point a and sack u2 constitutes and the angle of x positive axis.With the angle of this coordinates computed point a and sack 3,4,5,6, can determine the concrete sack that pockets.
If when the sack that pockets is non-vanishing (the assignment sack is zero during initialization), then these billiard ball are the ball that pockets, otherwise these billiard ball are the out-of-bounds ball;
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of claim of the present invention.
Claims (4)
1. in the Snooker motion, obtain the method for billiard ball collision relation and entire motion track, comprising: obtain the sequential frame image of bar snooker motion, determine the table top plane coordinates position of each billiard ball in each two field picture; Wherein, long limit, storehouse, billiard table table top limit is that X-axis, minor face are Y-axis, and the billiard ball coordinate is a billiard ball centre point coordinate; According to the plane coordinates of each billiard ball in every two field picture, obtain each billiard movement track; It is characterized in that described obtaining in each billiard movement track the movement locus of the billiard ball point of impingement is revised, the step of described correction comprises:
A, determine the characteristic value of the coordinate position point of each billiard ball in each two field picture, described characteristic value comprises: the straight line that each billiard ball present frame coordinate points and former frame coordinate points constitute is at the difference between the X coordinate of the slope of X-axis, two coordinate points, the angle of air line distance, straight line and X-axis positive direction of difference, two coordinate points between the Y coordinate;
B, in successive frame, variation according to the movement locus position coordinates of each billiard ball, whether the judgement present frame changes when the movement locus direction of forecourt, if change, judge that at first present frame works as forecourt and whether with other billiard ball collision is arranged, determine the point of impingement, revise the coordinate of current billiard ball at the point of impingement if any collision; As collisionless, judge whether present frame has collision with storehouse, table top limit when forecourt, determine the point of impingement, revise the coordinate of current billiard ball if any collision at the point of impingement;
Describedly judge that whether present frame has collision to be with other billiard ball when forecourt:
If the movement locus direction of the current billiard ball of b1 present frame changes, judge that other billiard ball change the distance of the movement locus straight line of the preceding coordinate of direction to current billiard ball;
B11, with the diameter of distance and billiard ball relatively is if distance is less than the billiard ball diameter, then on the movement locus of these billiard ball before current billiard ball change direction;
B12, judge whether these billiard ball have the change of the direction of motion at next frame;
B13, change, then these billiard ball are the collision billiard ball, and present frame is the collision frame, provide the coordinate of collision billiard ball when the collision frame;
B14, obtain the coordinate of current billiard ball at the point of impingement, the slope that is about in described current billiard ball present frame coordinate points and this coordinate points characteristic value constitutes straight line A, obtain through the vertical line B of collision spherical coordinates by straight line A perpendicular to straight line A, obtain the intersecting point coordinate of straight line A and vertical line B, on straight line A, obtain a new virtual billiard ball coordinate points of colliding ball of being close to by intersecting point coordinate and collision billiard ball at the coordinate of collision during frame, determine that this new coordinate points is current billiard ball point of impingement coordinate;
Describedly judge that whether present frame has collision to be with storehouse, table top limit when forecourt:
Whether b2, judgement two continuous frames change when the direction of the movement locus of forecourt;
If b21 changes, then current billiard ball collision storehouse, limit, present frame collides frame exactly;
Do you b22, judge that angle difference absolute value in the current billiard ball two continuous frames characteristic value is greater than the threshold limit value of the movement locus coordinate of revising current billiard ball? be, then obtain current billiard ball point of impingement coordinate: promptly by the slope of current billiard ball present frame coordinate in the characteristic value and the slope of next frame coordinate, obtain respectively through the linear equation of present frame coordinate points and the linear equation of process next frame coordinate points, obtain the intersecting point coordinate of two straight lines, determine that this intersecting point coordinate is point of impingement coordinate.
2. according to the described method of in the Snooker motion, obtaining billiard ball collision relation and entire motion track of claim 1, it is characterized in that the threshold limit value of the movement locus coordinate of the current billiard ball of described correction is 20.
3. according to the described method of in the Snooker motion, obtaining billiard ball collision relation and entire motion track of claim 1, it is characterized in that the described method of obtaining billiard ball collision relation and entire motion track in the Snooker motion further includes:
Determine the distance of mother bulb from the start frame coordinate to the collision frame coordinate; The ball of promptly determining first motion in all balls of table top is a mother bulb, and it is first collision ball of mother bulb that the billiard ball that impacted by mother bulb are defined as, thereby obtains the distance of mother bulb from the start frame coordinate to the collision frame coordinate.
4. according to the described method of in the Snooker motion, obtaining billiard ball collision relation and entire motion track of claim 1, it is characterized in that the described method of obtaining billiard ball collision relation and entire motion track in the Snooker motion further includes:
Determine to pocket ball or out-of-bounds ball promptly according to the movement locus of each ball in the billiard ball, are zero ball be defined as pocketing ball or out-of-bounds ball for the last frame coordinate, and concrete steps are:
G1, determine current billiard ball in the end the coordinate in the two field picture be zero;
G2, begin to seek the non-vanishing nearest frame of coordinate figure, provide when the coordinate figure of forecourt at this frame toward first frame direction from last frame;
The coordinate at the coordinate figure of g3, described this frame and 6 sack two ends constitutes two straight lines respectively, and described two straight lines and X-axis form angle angle1 and angle angle2 respectively, calculates the movement locus straight line of current billiard ball and the angle angle of X-axis;
If g4 angle angle is between the angle angle1 and angle angle2 of one of them sack in 6 sacks, determine that then this sack is the sack that pockets of ball of pocketing, these billiard ball are the ball that pockets, otherwise these billiard ball are the out-of-bounds ball.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010506981A CN101947385B (en) | 2010-10-12 | 2010-10-12 | Method for acquiring collision relationship and complete movement trail of billiards in snooker movement |
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| CN201010506981A CN101947385B (en) | 2010-10-12 | 2010-10-12 | Method for acquiring collision relationship and complete movement trail of billiards in snooker movement |
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| CN101947385B CN101947385B (en) | 2012-09-12 |
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|---|---|---|---|---|
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002186702A (en) * | 2000-12-22 | 2002-07-02 | Sefamedeia Create:Kk | Billiard practicing device and billiard practicing system |
| JP2006043017A (en) * | 2004-08-03 | 2006-02-16 | Seiko Epson Corp | Display device |
| US20060063599A1 (en) * | 2004-09-23 | 2006-03-23 | Michael Greenspan | Method and apparatus for positional error correction in a robotic pool systems using a cue-aligned local camera |
| GB2440573A (en) * | 2006-07-28 | 2008-02-06 | Sound Decisions Ltd | Snooker ball setting aided by image correlation |
| JP2009273542A (en) * | 2008-05-13 | 2009-11-26 | Taito Corp | Ball movement management device of billiard table |
| CN101770550A (en) * | 2010-03-09 | 2010-07-07 | 刘铮 | Computer-assisted snooker judging method for snooker |
| CN101848376A (en) * | 2010-05-19 | 2010-09-29 | 朱万政 | Television system for analyzing displacement of billiards |
-
2010
- 2010-10-12 CN CN201010506981A patent/CN101947385B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002186702A (en) * | 2000-12-22 | 2002-07-02 | Sefamedeia Create:Kk | Billiard practicing device and billiard practicing system |
| JP2006043017A (en) * | 2004-08-03 | 2006-02-16 | Seiko Epson Corp | Display device |
| US20060063599A1 (en) * | 2004-09-23 | 2006-03-23 | Michael Greenspan | Method and apparatus for positional error correction in a robotic pool systems using a cue-aligned local camera |
| GB2440573A (en) * | 2006-07-28 | 2008-02-06 | Sound Decisions Ltd | Snooker ball setting aided by image correlation |
| JP2009273542A (en) * | 2008-05-13 | 2009-11-26 | Taito Corp | Ball movement management device of billiard table |
| CN101770550A (en) * | 2010-03-09 | 2010-07-07 | 刘铮 | Computer-assisted snooker judging method for snooker |
| CN101848376A (en) * | 2010-05-19 | 2010-09-29 | 朱万政 | Television system for analyzing displacement of billiards |
Non-Patent Citations (2)
| Title |
|---|
| 《体育科学》 20070430 许彩明等 台球运动中主球运动轨迹的仿真分析 第80-83页 1-4 第27卷, 第4期 2 * |
| 《第十四届全国信号处理学术年会(CCSP-2009)论文集》 20090831 毋立芳等 一种鲁棒的图像分割算法 第252-255页 1-4 第25卷, 第8A期 2 * |
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| CN103143158A (en) * | 2013-03-09 | 2013-06-12 | 北京工业大学 | Method for improving snooker hit rate |
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