CN106408588A - Field-goal percentage influence factor analysis method based on image processing technology - Google Patents
Field-goal percentage influence factor analysis method based on image processing technology Download PDFInfo
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- CN106408588A CN106408588A CN201610283797.XA CN201610283797A CN106408588A CN 106408588 A CN106408588 A CN 106408588A CN 201610283797 A CN201610283797 A CN 201610283797A CN 106408588 A CN106408588 A CN 106408588A
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B2071/065—Visualisation of specific exercise parameters
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/18—Inclination, slope or curvature
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/30—Speed
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2243/00—Specific ball sports not provided for in A63B2102/00 - A63B2102/38
- A63B2243/0037—Basketball
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20212—Image combination
- G06T2207/20224—Image subtraction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30221—Sports video; Sports image
Abstract
The invention discloses a field-goal percentage influence factor analysis method based on an image processing technology. The method comprises the following steps of S1, putting up a camera; S2, carrying video shooting; S3 performing video processing; and S4, processing an image using a frame-to-frame difference method. By the scientific theory analysis, the favorable guidance is provided for athletes in shooting exercise in further, and the athletes are enabled to find the optimal angle of projection in shooting exercise, so that a fixed habit is formed after long-time training, thereby improving the field-goal percentage.
Description
Technical field
The invention belongs to image technique field and in particular to a kind of based on image processing techniques field goalds impact because
The analysis method of element.
Background technology
With the popularization of digital image product, DV enters work and the every field of life, thus causes
The change of scientific research method also penetrate into rapidly in all trades and professions, using technique, research object is converted into dynamic or static
Picture, then calculation process is carried out to pixel specific in picture, obtains studying required figure or equation, with this, experiment is intended to
The parameter of research is analyzed and discusses playing critically important effect to present scientific achievement.
The principal element of impact field goalds has shooting angle of trajectory, release speed and height of selling.At image
Reason technology, obtains accurate basketball movement track, with fundamental mechanics theoretical research and analysis movement locus, obtains selling during shooting
Impact highly to angle of trajectory and release speed, provides effective Research foundation for shootaround.
The process it is thus desirable to a kind of next detailed anatomy of analysis method of field goalds influence factor of offer is entirely shot.
Content of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of analysis method of field goalds influence factor
Carry out detailed anatomy entirely to shoot process.
A kind of analysis method of the field goalds influence factor based on image processing techniques, methods described includes following step
Suddenly：
S1, frame camera；
S2, video capture；
S3, Video processing；
S4, carries out image procossing using frame-to-frame differences method.
Preferably, described step S1 is specially：Camera pedestal is located at the perpendicular bisector of shooting spot and ring projection join line
On, and ensure in video, to capture the flight path that basketball enters ring from selling to completely, then fix video camera.
Preferably, described step S2 is, selects a sportsman, using original place Baseball shot technology free throws, carries out
It is continuously shot.
Preferably, described step S3 is：Video is split frame by frame by the incoming computer of video that shooting is completed with MATLAB
For static images.
Preferably, described step S4 is：In the static images that complete of segmentation, choose one group from basketball sell one be carved into into
Enter the complete procedure of ring, synthesize basketball flight path real time picture using frame-to-frame differences method.
Preferably, described frame-to-frame differences method is specially：
First, with being previously stored or obtaining background image sequence in real time to carry out statistical modeling for each pixel, carried on the back
Scape Model Bk, by the current picture frame f containing moving targetkWith background model BkSubtract each other, i.e. formula (1), wherein DkFor making after difference
Result；
Secondly, result of calculation is carried out binaryzation under certain threshold value T limits, such as formula (2), judge in present image
The deviation background model occurring is worth those larger pixels, then the moving target pixel for occurring, wherein RkIt is containing target
Binary image；
Dk(x, y)=| fk(x,y)-Bk(x,y)| (1)
Technical scheme has the advantages that：
The present invention provides a kind of analysis method of the field goalds influence factor based on image processing techniques, is being transported
Mobilize shooting motion track after, using time interval and distance effectively calculate bury a shot when athletic angle of trajectory and
Release speed, to angle during hit and speed statistics and analysis, by the theory analysis of this science, can be modern in sportsman
Shooting exercise afterwards provides favourable guidance, makes sportsman find optimum delivery angle degree, prolonged exercise in shootaround, is formed
Fixing custom, thus improve field goalds.
Brief description
Below by drawings and Examples, technical scheme is described in further detail.
Fig. 1 is that a kind of basketball of the analysis method of the field goalds influence factor based on image processing techniques of the present invention flies
Row track schematic diagram；
Fig. 2 is a kind of basketball patch of analysis method of the field goalds influence factor based on image processing techniques of the present invention
Block diagram is entered in ring forward position；
Fig. 3 is a kind of basketball patch of analysis method of the field goalds influence factor based on image processing techniques of the present invention
After ring, block diagram is entered on edge.
Specific embodiment
In order to have a clear understanding of technical scheme, its detailed structure will be set forth in the description that follows.Obviously, originally
Simultaneously deficiency is limited to the specific details that those skilled in the art is familiar with for the concrete execution of inventive embodiments.The preferred reality of the present invention
Apply example to be described in detail as follows, except these describing in detail implement exception, can also have other embodiment.
With reference to the accompanying drawings and examples the present invention is described in further details.
See figures.1.and.2, disclose a kind of analysis side of the field goalds influence factor based on image processing techniques
Method, the method comprising the steps of：
Set up camera.The shooting just to ring for the experimental study penalty line, camera pedestal is located at shooting spot with ring projection even
On the perpendicular bisector of line, and ensure in video, to capture the flight path that basketball enters ring from selling to completely.Find
Correct position, fixing video camera.
Video capture.Select a sportsman, using original place Baseball shot technology free throws, be continuously shot.
Video processing.Video is divided into static images with MATLAB by the incoming computer of video that shooting is completed frame by frame.
Image procossing.In the static images that complete of segmentation, choose one group and sell from basketball and one be carved into and enter the complete of ring
It has suffered journey, synthesize basketball flight path real time picture using frame-to-frame differences method.
Background difference basic thought is：First, with being previously stored or obtaining background image sequence in real time for each pixel
Carry out statistical modeling, obtain background model Bk, by the current picture frame f containing moving targetkWith background model BkSubtract each other, that is, public
Formula (1), wherein DkFor making the result after difference；Secondly, result of calculation is carried out binaryzation under certain threshold value T limits, such as formula
(2) those larger pixels of the deviation background model value of appearance in present image, are judged, then the moving target picture for occurring
Element, wherein RkIt is the binary image containing target.Because moving object and background have difference, phase in gray scale or color
The result subtract, obtaining after threshold operation has directly given the position of target, size, shape etc., thus obtaining more complete target
Information.
Dk(x, y)=| fk(x,y)-Bk(x,y)| (1)
Choose moment the 2632nd frame picture of selling herein as background, because captured video is 30 frames/second, for guaranteeing to close
Become trajectory diagram basketball not overlapping, choose the 2634th frame as next width picture, by 2632 frames and the synthesis of 2634 frame pictures.By same
Method synthesizes whole group picture, that is, obtain basketball and enter ring whole process from selling to.
When physical angle to analyze marksmanship, generally basketball regard as a particle to treat it is easy to
Just basketball central point can be found, we connect each basketball central point, have just obtained basketball flight path figure, as shown in Figure 1.
Experiment fixing shooting distance in literary composition, and same sportsman using original place Baseball shot technology free throws when sell
Highly it is basically unchanged.If shooting distance is x, ring is L apart from ground level, and height of selling is l, then basketball is from entrance of selling
Basketry vertical displacement is y=L-l, if release speed is V, angle of trajectory is θ, can obtain according to upper figure track：
In the horizontal direction
Vx=V cos θ
X=V cos θ t
(3)
In the vertical direction
Vy=V sin θ t
Simultaneous
X=V cos θ t
Eliminate parameter t, can get
In actual conditions, it is considered as saving strength, that is, minimum speed to be taken, when making V minimum, take (5) formula denominator f (θ)=x
Sin2 θ-y cos2 θ-y maximum.
Order
(7) formula is brought into (6) formula obtain：
(8) formula of observation, we can obtain, and takeMaximum, that is,
When, V takes minimum of a value, nowAccuracy degree is high and laborsaving.
In civilian, experiment is shot using 30 frames/second video camera, i.e. scanning 30 pair pictures per second, in synthesis basketball real-time flight rail
During mark, interval one frame of previous width picture and latter piece, that is, in synthesis, between adjacent basketball, time interval is 0.067s.
Basketball peak time of flying can be calculated by the quantity of basketball in image, is set to that to reach the peak time be d, equally, obtains
Basketball is D from hand to entrance ring total time.
Drawn according to kinematical equation：
Shooting initial velocity
In view of basketball and ring size, when basketball enters ring basketball center and ring center in same level,
Ring forward position can be pasted recently, interior edge, such as Fig. 3 after farthest patch ring.
The release speed now shot and angle of trajectory scope are
In above formula, R is ring radius, and r is basketball radius；d1,d2Fly for basketball in the case of edge behind patch forward position and patch
The time of high point, D1,D2Total time for basketball flight in the case of two kinds.
The present invention by the extraction to basketball movement track, analyze fixing shooting apart from when angle of trajectory and speed of selling
The impact to field goalds for the degree：
(1) with the increase of height of selling, the best angle of angle of trajectory reduces.
(2) minimum angle of trajectory and its corresponding minimum release speed reduce with the increase of height of selling.
(3) sell height one regularly, release speed is bigger, and angle of trajectory is also bigger.
After obtaining sportsman's shooting motion track, effectively calculate, using time interval and distance, the luck that buries a shot
The angle of trajectory mobilized and release speed, to angle during hit and speed statistics and analysis, are divided by the theory of this science
Analysis, can provide favourable guidance in sportsman's shooting exercise from now on, so that sportsman is found in shootaround and most preferably sell
Angle, prolonged exercise, form fixing custom, thus improving field goalds.
Finally it should be noted that：Above example is only not intended to limit in order to technical scheme to be described, to the greatest extent
Pipe has been described in detail to the present invention with reference to above-described embodiment, and those of ordinary skill in the art still can be to this
Bright specific embodiment is modified or equivalent, these without departing from spirit and scope of the invention any modification or
Equivalent, is all applying within pending claims.
Claims (6)
1. a kind of analysis method of the field goalds influence factor based on image processing techniques is it is characterised in that methods described
Comprise the following steps：
S1, frame camera；
S2, video capture；
S3, Video processing；
S4, carries out image procossing using frame-to-frame differences method.
2. the analysis method of the field goalds influence factor based on image processing techniques according to claim 1, it is special
Levy and be, described step S1 is specially：Camera pedestal is located on shooting spot and the perpendicular bisector of ring projection join line, and protects
Capture, in card video, the flight path that basketball enters ring from selling to completely, then fix video camera.
3. the analysis method of the field goalds influence factor based on image processing techniques according to claim 1, it is special
Levy and be, described step S2 is to select a sportsman, using original place Baseball shot technology free throws, be continuously shot.
4. the analysis method of the field goalds influence factor based on image processing techniques according to claim 1, it is special
Levy and be, described step S3 is：Video is divided into static map with MATLAB by the incoming computer of video that shooting is completed frame by frame
Piece.
5. the analysis method of the field goalds influence factor based on image processing techniques according to claim 1, it is special
Levy and be, described step S4 is：In the static images that complete of segmentation, choose one group and sell from basketball and one be carved into and enter ring
Complete procedure, synthesizes basketball flight path real time picture using frame-to-frame differences method.
6. the analysis method of the field goalds influence factor based on image processing techniques according to claim 5, it is special
Levy and be, described frame-to-frame differences method is specially：
First, with being previously stored or obtaining background image sequence in real time to carry out statistical modeling for each pixel, obtain background mould
Type, by the current picture frame containing moving targetAnd background modelSubtract each other, i.e. formula (1), whereinFor making after difference
Result；
Secondly, result of calculation is carried out binaryzation under certain threshold restriction, such as formula (2), judge occur in present image
Deviation background model larger those pixels of value, then the moving target pixel for occurring, whereinIt is the two-value containing target
Change image；
.
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Cited By (3)
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| CN108355340A (en) * | 2018-02-06 | 2018-08-03 | 浙江大学 | A kind of method of counting of bouncing the ball based on video information |
| CN110517290A (en) * | 2019-08-20 | 2019-11-29 | 北京精英系统科技有限公司 | A method of for detecting high-speed moving object and strengthening display |
| CN111068287A (en) * | 2019-12-05 | 2020-04-28 | 上海体育学院 | Basketball goal counting timing device and method based on machine vision |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108355340A (en) * | 2018-02-06 | 2018-08-03 | 浙江大学 | A kind of method of counting of bouncing the ball based on video information |
| CN110517290A (en) * | 2019-08-20 | 2019-11-29 | 北京精英系统科技有限公司 | A method of for detecting high-speed moving object and strengthening display |
| CN111068287A (en) * | 2019-12-05 | 2020-04-28 | 上海体育学院 | Basketball goal counting timing device and method based on machine vision |
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Application publication date: 20170215 |
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