CN110472179A - Round bullet impact and the case suspect of the perpendicular window in ground check method - Google Patents
Round bullet impact and the case suspect of the perpendicular window in ground check method Download PDFInfo
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Abstract
The invention discloses a kind of round bullet impacts and the case suspect of the perpendicular window in ground to check method, and ballistic trajectory parameter calculates, and obtains the numerical value of the angle γ of instantaneous velocity V and glass planar；Measure the numerical value of shell hole image long axis and glass planar y' axis angle α；Calculate the angle beta of trajectory plane and glass plane normal；Trajectory parabolic path is calculated, calculates ballistic trajectory towards module；With establishing emphasis personnel's household register and residence latitude and longitude coordinates database；Formulate three-level search range；The suspect of different regions of search is checked using means of different.Operation of the present invention is easy, it is easy to accomplish, maximum precise restoration ballistic trajectory parabola, whole-process automatic search investigation uses manpower and material resources sparingly；The positional relationship that can show suspect's Location Yu specific case projectile's path track makes search investigation have more specific aim；According to the suspicion grade of search grade classification suspect, keep search investigation more scientific.
Description
Technical field
The present invention relates to a kind of round bullet impacts and the case suspect of the perpendicular window in ground to check method, belongs to
Criminal investigation technical field.
Background technique
In recent years, with the extensive use of social economy's fast development and internet, illegal activities people can be increasingly lighter
It changes places and obtains gun-simulation, air gun and this kind of contraband of bow and crossbow, leading to steel ball class illegal activities in recent years is in continue high-incidence situation.
In such case, often only a glass hole can be left in aggrieved glass in other.To such case of investigating and prosecuting
Part needs to solve the problems, such as three: 1, reduction transmitting steel ball trajectory parabola judges to emit position；2, to periphery emphasis suspicion crowd
Seeking investigation is carried out, the doubtful personnel of emphasis are found；3, research is compared to periphery history case information, finds out case in region
Feature occurs.
Tradition is handled a case, and there are following disadvantages for means: 1, trajectory parabola and county of emission judgement lack effectively quantitative calculate
Method relies primarily on personal experience；2, the sequence of suspicion degree can not be carried out to multiple suspects according to on-site actual situations；3, for
Periphery history case information is only capable of making the record on when and where, can not further be compared and be divided according to actual transmission trajectory
Analysis；4, three above problem needs to solve respectively by the not homologous ray of different departments, mutually isolates and lacks to each other effectively
Communication and coordination mechanism.
How to pass through analysis steel ball and beat the trace after glass, to determine the ballistic trajectory of transmitting steel ball, to be further
It determines lawbreaker's location-based service, is those skilled in the art's problem in urgent need to solve.
Calculate that the parabolical calculation method of trajectory is primarily present following difficult point by shell hole trace:
1, it can not be measured for the vector component velocity of trajectory parabola calculation and the angular relationship of projectile flight speed；
2, the orientation angles of the trajectory plane of projectile flight can not measure；
3, the different angle relationship between glass planar and ground can not measure the influence that ballistic trajectory calculates.
It is glass planar and the perpendicular window in ground that the bullet to be studied of the present invention, which beats object, as shown in Figs. 1-2, including extremely
Few one of which: sliding window and casement window.
Summary of the invention
Purpose: in order to overcome the deficiencies in the prior art, the present invention provides a kind of round bullet impact with ground and is in
The case suspect of vertical window checks method, and such bullet shape is fixed, and flight is by air in calm or gentle breeze environment
Drag effects are smaller, and for velocity attenuation less than 10%, trajectory is similar to parabolic motion, it then follows parabolic motion rule, it is public
Formula isV in formulaLAnd VHThe respectively component velocity of bullet in the horizontal and vertical directions, the two with
There are geometry teaching relationships by speed V in projectile flight, and are influenced with the angular values of V by following situations: 1, projectile impact
The instantaneous velocity and glass planar angle of glass；2, inclined degree of the shell hole trace in glass planar；3, glass planar and ground
The tilt angle in face.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of case suspect investigation method of the impact of circle bullet and the perpendicular window in ground, includes the following steps:
Ballistic trajectory parameter calculates:
Obtain the numerical value of the angle γ of instantaneous velocity V and glass planar；
Measure the numerical value of shell hole image long axis and glass planar y' axis angle α；
Calculate the angle beta of trajectory plane and glass plane normal；
Calculate trajectory parabolic path:
The instantaneous stroke speed V of bullet is set to limit variable, then trajectory parabola indicates are as follows:
T in formula is time variable, and g is acceleration of gravity, shot orbit horizontal axis flying distance L, the shot orbit longitudinal axis
Flying height H, h are shell hole o point apart from ground level；
Set the horizontal maximum distance L of trajectory parabolamaxTo limit variable, then trajectory parabola indicates are as follows:
T in formula is time variable, and g is acceleration of gravity, shot orbit horizontal axis flying distance L, the shot orbit longitudinal axis
Flying height H, h are shell hole o point apart from ground level；
Set ballistic trajectory apogee distance shell hole o point maximum normal distance h1To limit variable, then trajectory parabola table
It is shown as:
T in formula is time variable, and g is acceleration of gravity, shot orbit horizontal axis flying distance L, the shot orbit longitudinal axis
Flying height H, h are shell hole o point apart from ground level；
Calculate ballistic trajectory direction:
Plane is on the right side of plane where glass planar normal where trajectory parabola, then the parabolical azimuth of trajectory
For δ+β, plane is in the left side of plane where glass planar normal, the then parabolical azimuth of trajectory where trajectory parabola
δ-β, δ are the azimuth of the normal of glass planar where shell hole；
With establishing emphasis personnel's household register and residence latitude and longitude coordinates database；
Formulate three-level search range；
By the latitude and longitude coordinates mark of the household register address of illegal previous conviction personnel or residence location or household register address and residence location
It infuses in the region of search on map, wherein the suspect of different regions of search is checked using means of different.
Preferably, described
Preferably, steps are as follows for the numerical value acquisition of the angle γ of instantaneous velocity V and glass planar:
Step 1: hole on glass image recognition: passing through image algorithm and the convolutional neural networks bullet based on TensorFlow
The angle γ of instantaneous velocity and glass when hitting glass is identified；
1.1 sample image pre-processings:
Angle γ is set as 0-90 degree, average every image increases by 1 degree, and totally 91 hole on glass images are input to machine
In, binary conversion treatment is carried out, is removed variegated；
Using the outermost pixel on shell hole image four sides up and down as basic point, expands a certain distance respectively and intercept, obtain
To master sample image；
1.2 sample image feature extractions:
Master sample image is input in the convolutional neural networks of TensorFlow and carries out the operation of n times convolution pondization, it will
Sample image gradually decomposes, and calculates the characteristic value of sample image；
1.3 sample images substitute into training:
The hole on glass image pattern of multiple same angle γ angles is input in machine, 1.1 and 1.2 behaviour is repeated
Make, machine is allowed to carry out a large amount of repetition training；
Step 2: the identification of live image:
2.1 live image pre-processings:
The hole on glass image of live shooting is input in machine, image binaryzation processing and image interception is carried out, obtains
Standard to live shell hole image identifies format；
2.2 live image feature extractions:
The live shell hole image of reference format is input in the convolutional neural networks of TensorFlow, n times convolution is carried out
Chi Hua calculates the characteristic value of live shell hole image；
2.3 aspect ratios pair obtain angle γ:
The feature of different angle sample image in the characteristic value and sample database of the live shell hole image that system-computed is gone out
Value is compared, and carries out result output for the highest angle of degree of fitting as the angle of live shell hole image.
Preferably, described includes: to public affairs with residence latitude and longitude coordinates database with establishing emphasis personnel's household register
Pacify internal database carry out information retrieval, find out because gun-related case handled or be listed in accordance with the law major tasks object it is illegal before
Section personnel, household register address and residence location to illegal previous conviction personnel carry out inverse geocoding, obtain its household register address and now live
The latitude and longitude coordinates information of address, and database table is established, table field includes: name, gender, citizenship number, case
Part number, the detailed location of household register, household register X-coordinate, household register Y-coordinate, the detailed location in personnel address, address X-coordinate, is now lived at brief merit
Location Y-coordinate.
Preferably, the formulation three-level search range includes:
2-1 determines glass planar X-axis both ends azimuth:
2-2 determines three-level search mechanisms:
The latitude and longitude coordinates of shell hole are labeled on map by 2-2-1, are set as O；
For 2-2-2 using shell hole O as the center of circle, certain distance is radius in map upper drawing circle；
2-2-3 draws straight line using O as starting point, to glass planar normal towards the azimuth direction δ, meets at point F with circle；It is with O
Starting point draws straight line to the both direction vertical with azimuth δ respectively, meets at point A, B respectively with circle；Using O as starting point, thrown to trajectory
Object line draws straight line towards the azimuth direction δ+β or δ-β, meets at point D with circle；Radius OD is rotated into certain angle to two sides respectively
Degree meets at point C, E with circle respectively；
Region of search is arranged in 2-3:
The fan-shaped region 2-3-1 COE is set as Primary search region；
The fan-shaped region 2-3-2 BOC, fan-shaped region AOE are set as secondary search region；
The fan-shaped region 2-3-3 BOA is set as three-level region of search.
Preferably, glass planar X-axis both ends azimuth preparation method is as follows: two sides of glass planar X-axis
To azimuth be+90 °, δ -90 ° of δ.
Preferably, the certain angle is set as a value in section (15 ° -20 °) range.
Preferably, the certain distance is set as a value in section (300M-400M) range.
Preferably, the suspect of the different regions of search includes: using means of different investigation
Suspect in 3-1 Primary search region, being defined as highest-order emission suspicion is that emphasis checks object；
Suspect in 3-2 secondary search region is defined as intermediate transmitting suspicion；
Suspect in 3-3 three-level region of search, is defined as lower-order emission suspicion.
The utility model has the advantages that the case suspect investigation side of circle bullet impact and the perpendicular window in ground provided by the invention
Method is α by estimation, shell hole image long axis and the angle of glass planar y' axis to instantaneous velocity and the angle γ of glass planar
Measurement, calculate the angle beta of trajectory plane Yu glass plane normal, and combine live actual environment, set following three item numbers
One in:
1, speed when projectile impact glass；
2, the parabolical maximum height in place；
3, the parabolical longest distance in place.
Parabola is calculated, to calculate the direction δ ± β and distance in transmitting bullet place.
Latitude and longitude coordinates information in the household register address and residence location for grasping the illegal emphasis personnel of Related Cases previous conviction, with
And on the multi-pass decoding manufacturing basis made towards azimuth using projectile's path track, potential suspicion personnel are flown with bullet
Row trajectory makees the association analysis on geographical location.
There are following advantages for this method:
1, related fields blank has been filled up, a kind of calculating side for extrapolating entire ballistic trajectory from shell hole trace has been invented
Method；
2, this method only need to make DATA REASONING for the shell hole after projectile impact, without measuring entire ballistic flight rail
Mark, it is easy to operate, it is easy to accomplish；
3, this method can be according to live different situations setup parameter, and all algorithms meet physics by stringent operation
And mathematical operation rule, it can maximum precise restoration ballistic trajectory parabola；
4, whole-process automatic search investigation, uses manpower and material resources sparingly；
5, the positional relationship that can show suspect's Location Yu specific case projectile's path track makes search investigation more
Has specific aim；
6, according to the suspicion grade of search grade classification suspect, keep search investigation more scientific.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sliding window；
Fig. 2 is the structural schematic diagram of casement window；
Fig. 3 is sample image pre-processing schematic diagram；
Fig. 4 is master sample image procossing schematic diagram；
Fig. 5 is sample image feature extraction processing schematic；
Fig. 6 is the schematic diagram of the angle γ of instantaneous velocity and glass planar；
Fig. 7 is the schematic diagram that the angle of shell hole image long axis and glass planar y' axis is α；
Fig. 8 is the schematic diagram of ballistic trajectory plane and glass plane normal y'o'z' angle β；
Fig. 9 is the schematic diagram that instantaneous velocity V is η with the y-axis angle in three-dimensional system of coordinate；
Figure 10 is the triangle relation schematic diagram of angle α, γ, β, η；
Figure 11 is the schematic diagram of shot orbit；
Figure 12 is the relation schematic diagram of ballistic trajectory direction；
Figure 13 is region of search schematic diagram；
Figure 14 is three-level region of search schematic diagram.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
A kind of case suspect investigation method of the impact of circle bullet and the perpendicular window in ground, includes the following steps:
Step 1: hole on glass image recognition: passing through image algorithm and the convolutional neural networks bullet based on TensorFlow
The angle γ of instantaneous velocity and glass when hitting glass is identified.
1.1 sample image pre-processings:
As shown in figure 3, setting angle γ as 0-90 degree, average every image increases by 1 degree, and totally 91 hole on glass images are defeated
Enter into machine, carry out binary conversion treatment, removes variegated.
As shown in figure 4, expanding a certain distance respectively using the outermost pixel on shell hole image four sides up and down as basic point
And intercept, obtain master sample image.
1.2 sample image feature extractions:
As shown in figure 5, master sample image is input to progress n times convolution pond in the convolutional neural networks of TensorFlow
Change operation, sample image is gradually decomposed, calculates the characteristic value of sample image by such as n=5.
1.3 sample images substitute into training:
The hole on glass image pattern of multiple same angle γ angles is input in machine, 1.1 and 1.2 behaviour is repeated
Make, allows machine to carry out a large amount of repetition training, keep characteristic value more accurate.
Step 2: the identification of live image:
2.1 live image pre-processings:
The hole on glass image of live shooting is input in machine, image binaryzation processing and image interception is carried out, obtains
Standard to live shell hole image identifies format.
2.2 live image feature extractions:
The live shell hole image of reference format is input in the convolutional neural networks of TensorFlow, n times convolution is carried out
Chi Hua calculates the characteristic value of live shell hole image.
2.3 aspect ratios pair obtain angle γ:
The feature of different angle sample image in the characteristic value and sample database of the live shell hole image that system-computed is gone out
Value is compared, and carries out result output for the highest angle of degree of fitting as the angle of live shell hole image.
Step 3: ballistic trajectory parameter calculates:
3.1 obtain the angle γ of instantaneous velocity and glass planar, as shown in fig. 6, o ' is shell hole, V is that steel ball hits glass
Instantaneous velocity when plane, x ' are the trunnion axis of glass planar, and y ' is the vertical axis of glass planar, and o ' a is V in glass planar
Projection, angle of the angle γ between V and o ' a.
When 3.2 bullet tilt angles hit glass, shell hole image is an ellipse, and oval long axis is that shell hole image is long
Axis, if the angle of shell hole image long axis and glass planar y' axis is α, as shown in fig. 7, wherein shell hole image long axis direction is wink
Projecting direction of the Shi Sudu V in glass planar.
3.3 calculate the angle beta of trajectory plane and glass plane normal.
Instantaneous velocity is V when 3.3.1 setting steel ball shock glass；
3.3.2 setting when hoodle hits glass has glass planar x' axle speed Vx', glass planar y' axle speed Vy' and perpendicular to
The z' axle speed Vz' of glass planar；
3.3.3 as shown in figure 8, setting ballistic trajectory plane and plane x'o'z' intersecting straight lines o'b, then line o'b and line o'z'
Angle is ballistic trajectory plane and glass plane normal y'o'z' angle β.
3.3.4 obtaining following relationship:
Formula 3 will be substituted by formula 1,2 above.
3.4 calculate y-axis angle η in trajectory parabola and three-dimensional system of coordinate.
Since glass planar is perpendicular to ground, x' axis, y' axis and perpendicular to the z' axis of glass planar and three in glass planar
X-axis, y-axis and z-axis in dimension coordinate system coincide, so:
As shown in figure 9, set trajectory parabola most end point, in the instantaneous velocity V and three-dimensional system of coordinate when projectile impact glass
Y-axis angle be η, ob is projection of the instantaneous velocity V on plane xoz, and plane yob is plane where trajectory parabola；
As shown in Figure 10, following relational expression can be obtained:
∴vy=vsin γ tan β cot α
∵ vcos η=vy
∴ cos η=sin γ tan β cot α
Wherein, willSubstitute into above formula.
∴ cos η=cos γ cos α
∴ η=arccos (cos γ cos α)
It can be seen that it is unrelated with the numerical value of instantaneous velocity V to calculate angle η.
Step 4: calculating trajectory parabolic path.
It is shot orbit flying distance L that trajectory parabolic path plane, which is set as horizontal axis, and the longitudinal axis is that shot orbit flight is high
The two-dimensional plane coordinate system of H is spent, as shown in figure 11.
It is hole on glass position that o point, which is projectile impact point, in figure, and c point is coordinate origin, and the angle η is projectile impact
The angle of instantaneous velocity V and y-axis both H axis when glass, a point are ballistic trajectory apart from ground highest point, and b point is the minimum transmitting of bullet
Both ground launch position, h are shell hole o point apart from ground level, h for position1It hangs down for ballistic trajectory apogee distance shell hole o point maximum
Straight distance, LmaxThe maximum distance of farthest horizontal distance for ballistic trajectory apart from shell hole o point both pellet injection.
When projectile impact glass, using rum point shell hole o point as track starting point, trajectory parabolic path is calculated.Due to nothing
Spot speed V is hit in method measurement, needs to introduce restriction variable, various respectively to hit spot speed V, ballistic trajectory apart from shell hole below
The farthest horizontal distance L of o pointmax, ballistic trajectory vertex distance shell hole o point maximum normal distance h1To limit variable, both basis
Live actual environment sets each numberical range for limiting variable.
4.1: step 1.1 make shell hole sample image during, measurement record each shell hole sample angle be γ when
The instantaneous stroke speed V of bullet, instantaneous velocity V under same glass material and thickness when projectile impact glass and shell hole angle
The rule of γ is stablized, so when live window-glass is approximate with sample glass in material and thickness, it can be according to angle γ's
Recognition result directlys adopt the speed V recorded in laboratory.Both the speed of V was drawn according to live glass material and projected angle of impact
It is fixed.Then trajectory parabola is represented by following formula:
Wherein, the t in formula is time variable, indicates the value of the L and H under different time.
It willThe substitution of η value can obtain following formula:
As H=0, indicate that both ballistic trajectory has extended to ground to ballistic trajectory apart from shell hole o point vertical range for-h, this
When be set as trail termination.
4.2: specific by some such as rivers, city wall such as discovery scene because particular surroundings limits according to on-site actual situations
L can not then be set as limiting variable by landform barrier in place transmitting bullet of the distance greater than L, otherwise horizontal with trajectory parabola
Maximum distance L is to limit variable, then trajectory parabola is represented by following formula:
T in above formulacbTrack time required for from L axis c point to b point in indicates coordinate system, in this period rail
The horizontal distance that mark is passed through is Lmax。
Eliminate tcb, then:
By η value, cos η=cos γ cos α, sin2η=1-cos2η,
It substitutes intoFollowing relationship can be obtained:
As H=0, indicate that both ballistic trajectory has extended to ground to ballistic trajectory apart from shell hole o point vertical range for-h, this
When be set as trail termination.
4.3: in conjunction with on-site actual situations, such as finding live periphery but the special launch site of high building, plateau, with trajectory
Maximum vertical height of the parabola apart from shell hole o point is to limit variable, both sets track apex height depending on the site environment, then bullet
Road parabola is represented by following relationship:
T in above formulacaIndicate that track is the time required to from L axis c point to a point in a coordinate system, a point is track vertex
Coordinate, in this coordinate, the speed of track vertical direction is 0, the wink according to free-fall velocity formula, in shell hole position when o point
The vertical component of Shi Sudu is vcos η=gtca。
Result above substitution coordinate formula can be obtained into following relationship:
η value is substituted into above formula, following relationship can be obtained:
As H=0, indicate that both ballistic trajectory has extended to ground to ballistic trajectory apart from shell hole o point vertical range for-h, this
When be set as trail termination.
Step 5, ballistic trajectory direction is calculated.
As shown in figure 12, δ is the azimuth of the normal of glass planar where shell hole, plane and glass where β trajectory parabola
The angle of plane where glass plane normal, plane is on the right side of plane where glass planar normal where trajectory parabola, then
The parabolical azimuth of trajectory is δ+β, and plane is in the left side of plane where glass planar normal where trajectory parabola, then bullet
The parabolical azimuth in road is δ-β, the as direction of trajectory parabolic path.
Step 6: with establishing emphasis personnel's household register and residence latitude and longitude coordinates database；
Information retrieval is carried out to public security internal database, is found out because gun-related case is handled or be listed in accordance with the law major tasks
The illegal previous conviction personnel of object, household register address and residence location to illegal previous conviction personnel carry out inverse geocoding, obtain its family
The latitude and longitude coordinates information of nationality address and residence location, and database table is established, table field includes: name, gender, citizen
Identification number, docket, brief merit, the detailed location of household register, household register X-coordinate, household register Y-coordinate, the detailed location in personnel address, address
X-coordinate, address Y-coordinate, as shown in table 1.
1 database table of table
Step 7: formulate three-level search range:
7-1 determines glass planar X-axis both ends azimuth:
Since glass planar and glass plane normal are to be mutually perpendicular to relationship, so the side of glass planar X-axis both direction
Parallactic angle is+90 °, δ -90 ° of δ.
7-2 determines three-level search mechanisms:
The latitude and longitude coordinates of shell hole are labeled on map by 7-2-1, are set as O；
For 7-2-2 using shell hole O as the center of circle, taking a value in section (300M-400M) range is radius in map upper drawing circle.
As shown in figure 13,7-2-3 draws straight line to glass planar normal towards the azimuth direction δ, hands over circle using O as starting point
In point F；Using O as starting point, straight line is drawn to the both direction vertical with azimuth δ respectively, meets at point A, B respectively with circle；It is with O
Point draws straight line towards the azimuth direction δ+β or δ-β to trajectory is parabolical, meets at point D with circle；By radius OD respectively to two sides
It rotates by a certain angle, meets at point C, E respectively with circle.
As shown in figure 14, region of search is arranged in 7-3:
The fan-shaped region 7-3-1 COE is set as Primary search region；
The fan-shaped region 7-3-2 BOC, fan-shaped region AOE are set as secondary search region；
The fan-shaped region 7-3-3 BOA is set as three-level region of search.
Step 8: by the longitude and latitude of the household register address of illegal previous conviction personnel or residence location or household register address and residence location
In region of search on Labeling Coordinate to map, wherein the suspect of different regions of search is checked using means of different:
8-1 Primary search region is pellet injection region, and the suspect that this area marking goes out can emit bullet from place dwelling
Ball hits live glass and bullet institute judges unanimously, to be defined as highest-order emission suspicion as emphasis and check object through trajectory and system.
8-2 secondary search region is shell hole glass planar towards region, and the suspect that this area marking goes out is from place dwelling
Live glass can be observed, emitted by the mobile i.e. reachable emitting area of small range, be defined as intermediate transmitting suspicion.
8-3 three-level region of search is glass back towards region, and the suspect that this area marking goes out can not from place dwelling
Shooting can not also observe live glass, but can observe the periphery situation in live glass location, using to scene
Solution can be moved to transmitting domain and be emitted, and be defined as lower-order emission suspicion.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of circle bullet impact and the case suspect of the perpendicular window in ground check method, it is characterised in that: including
Following steps:
Ballistic trajectory parameter calculates:
Obtain the numerical value of the angle γ of instantaneous velocity V and glass planar；
Measure the numerical value of shell hole image long axis and glass planar y' axis angle α；
Calculate the angle beta of trajectory plane and glass plane normal；
Calculate trajectory parabolic path:
The instantaneous stroke speed V of bullet is set to limit variable, then trajectory parabola indicates are as follows:
T in formula is time variable, and g is acceleration of gravity, shot orbit horizontal axis flying distance L, the flight of the shot orbit longitudinal axis
Height H, h are shell hole o point apart from ground level；
Set the horizontal maximum distance L of trajectory parabolamaxTo limit variable, then trajectory parabola indicates are as follows:
T in formula is time variable, and g is acceleration of gravity, shot orbit horizontal axis flying distance L, the flight of the shot orbit longitudinal axis
Height H, h are shell hole o point apart from ground level；
Set ballistic trajectory apogee distance shell hole o point maximum normal distance h1To limit variable, then trajectory parabola indicates are as follows:
T in formula is time variable, and g is acceleration of gravity, shot orbit horizontal axis flying distance L, the flight of the shot orbit longitudinal axis
Height H, h are shell hole o point apart from ground level；
Calculate ballistic trajectory direction:
Plane is on the right side of plane where glass planar normal where trajectory parabola, then the parabolical azimuth of trajectory be δ+
β, plane is in the left side of plane where glass planar normal where trajectory parabola, then the parabolical azimuth of trajectory is δ-β,
δ is the azimuth of the normal of glass planar where shell hole；
With establishing emphasis personnel's household register and residence latitude and longitude coordinates database；
Formulate three-level search range；
The latitude and longitude coordinates of the household register address of illegal previous conviction personnel or residence location or household register address and residence location mark is arrived
In region of search on map, wherein the suspect of different regions of search is checked using means of different.
2. circle bullet impact according to claim 1 and the case suspect of the perpendicular window in ground check method,
It is characterized by: described
3. circle bullet impact according to claim 1 and the case suspect of the perpendicular window in ground check method,
It is characterized by: the numerical value of the angle γ of instantaneous velocity V and glass planar obtains, steps are as follows:
Step 1: hole on glass image recognition: passing through image algorithm and the convolutional neural networks projectile impact based on TensorFlow
The angle γ of instantaneous velocity and glass when glass is identified；
1.1 sample image pre-processings:
Angle γ is set as 0-90 degree, average every image increases by 1 degree, and totally 91 hole on glass images are input in machine, into
Row binary conversion treatment removes variegated；
Using the outermost pixel on shell hole image four sides up and down as basic point, expands a certain distance respectively and intercept, marked
Quasi- sample image；
1.2 sample image feature extractions:
Master sample image is input in the convolutional neural networks of TensorFlow and carries out the operation of n times convolution pondization, by sample
Image gradually decomposes, and calculates the characteristic value of sample image；
1.3 sample images substitute into training:
The hole on glass image pattern of multiple same angle γ angles is input in machine, 1.1 and 1.2 operation is repeated, allows
Machine carries out a large amount of repetition training；
Step 2: the identification of live image:
2.1 live image pre-processings:
The hole on glass image of live shooting is input in machine, image binaryzation processing and image interception is carried out, is showed
The standard of field shell hole image identifies format；
2.2 live image feature extractions:
The live shell hole image of reference format is input in the convolutional neural networks of TensorFlow, n times convolution pond is carried out,
Calculate the characteristic value of live shell hole image；
2.3 aspect ratios pair obtain angle γ:
By system-computed go out live shell hole image characteristic value and sample database in different angle sample image characteristic value into
Row compares, and carries out result output for the highest angle of degree of fitting as the angle of live shell hole image.
4. circle bullet impact according to claim 1 and the case suspect of the perpendicular window in ground check method,
It is characterized by: described includes: to public security internal data with residence latitude and longitude coordinates database with establishing emphasis personnel's household register
Library carries out information retrieval, finds out because gun-related case is handled or be listed in accordance with the law the illegal previous conviction personnel of major tasks object, right
The household register address of illegal previous conviction personnel and residence location carry out inverse geocoding, obtain the longitude and latitude of its household register address and residence location
Coordinate information is spent, and establishes database table, table field includes: name, gender, citizenship number, docket, briefly
The detailed location of merit, household register, household register X-coordinate, household register Y-coordinate, the detailed location in personnel address, address X-coordinate, address Y-coordinate.
5. circle bullet impact according to claim 1 and the case suspect of the perpendicular window in ground check method,
It is characterized by: the formulation three-level search range includes:
2-1 determines glass planar X-axis both ends azimuth:
2-2 determines three-level search mechanisms:
The latitude and longitude coordinates of shell hole are labeled on map by 2-2-1, are set as O；
For 2-2-2 using shell hole O as the center of circle, certain distance is radius in map upper drawing circle；
2-2-3 draws straight line using O as starting point, to glass planar normal towards the azimuth direction δ, meets at point F with circle；Using O as starting point,
Straight line is drawn to the both direction vertical with azimuth δ respectively, meets at point A, B respectively with circle；Using O as starting point, to trajectory parabola
Towards the azimuth direction δ+β or δ-β draw straight line, with circle meet at point D；Radius OD is rotated by a certain angle to two sides respectively, with
Circle meets at point C, E respectively；
Region of search is arranged in 2-3:
The fan-shaped region 2-3-1 COE is set as Primary search region；
The fan-shaped region 2-3-2 BOC, fan-shaped region AOE are set as secondary search region；
The fan-shaped region 2-3-3 BOA is set as three-level region of search.
6. circle bullet impact according to claim 5 and the case suspect of the perpendicular window in ground check method,
It is characterized by: glass planar X-axis both ends azimuth preparation method is as follows: the azimuth of glass planar X-axis both direction
It is+90 °, δ -90 ° of δ.
7. circle bullet impact according to claim 5 and the case suspect of the perpendicular window in ground check method,
It is characterized by: the certain angle is set as a value in section (15 ° -20 °) range.
8. circle bullet impact according to claim 5 and the case suspect of the perpendicular window in ground check method,
It is characterized by: the certain distance is set as a value in section (300M-400M) range.
9. circle bullet impact according to claim 5 and the case suspect of the perpendicular window in ground check method,
It is characterized by: the suspect of the difference region of search includes: using means of different investigation
Suspect in 3-1 Primary search region, being defined as highest-order emission suspicion is that emphasis checks object；
Suspect in 3-2 secondary search region is defined as intermediate transmitting suspicion；
Suspect in 3-3 three-level region of search, is defined as lower-order emission suspicion.
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