CN104301611B - A kind of bearing calibration of zoom tracking curve and device - Google Patents
A kind of bearing calibration of zoom tracking curve and device Download PDFInfo
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Abstract
The present invention provides a kind of bearing calibration of zoom tracking curve.This method includes：Select N number of zoom position of camera lens；Two zoom position zoom [i] of arbitrary neighborhood and the corresponding focusing position of zoom [i 1] difference in N number of zoom position are determined according to auto-focusing algorithm；And, the corresponding focusing position of described two zoom positions of arbitrary neighborhood is obtained according to the theoretical zoom tracking curve of camera lens；The corresponding focusing deviant focusoffset of above-mentioned two zoom position is calculated respectivelyzoom[i]And focusoffsetzoom[i‑1]；Calculate the corresponding focusing offset focusoffset of any zoom position zoom between described two zoom positions of arbitrary neighborhoodzoom；Calculate the corresponding actual focusing position Focus of any zoom position between described two zoom positions of arbitrary neighborhoodReal zoom：FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is the corresponding focusing positions of the zoom position zoom obtained according to the theoretical zoom tracking curve of camera lens.The zoom tracking curve corrected according to the inventive method image during zoom is followed has good definition performance.
Description
Technical field
The present invention relates to bearing calibration and the device in camcorder technology field, more particularly to a kind of zoom tracking curve.
Background technology
Because the individual difference of camera lens is, it is necessary to zoom to each camera lens, the optical reference position adjustment of focusing, confirm,
To obtain most suitable zoom tracking curve.There is a set of preferable curve of pursuit in the camera lens of fixed specification, camera lens is according to reason
Think that curve of pursuit does zoom with any time, image there may be different degrees of obscure during following.
Fig. 1 is that the theoretical curve of pursuit of the next camera lens of certain object distance and actual curve of pursuit are illustrated.Lateral coordinates are represented in the figure
The position zoom of zoom, longitudinal coordinate represents the position focus of focusing；Solid line is theoretical variable-focus tracing curve, and dotted line is real
The variable-focus tracing curve on border.Camera lens is during zoom is followed, if can be according to the actual variable-focus tracing of each camera lens itself
Curve is run simultaneously, and the whole process image that zoom is followed can be clear.So the actual zoom for obtaining each camera lens is chased after
Track curve is the problem of present invention needs solution.
The content of the invention
In view of this, the present invention provides bearing calibration and the device of a kind of zoom tracking curve.
The bearing calibration of the zoom tracking curve, including：A, the N number of zoom position for determining camera lens；The automatic focusing of B, basis
Algorithm determines two zoom position zoom [i] of arbitrary neighborhood and the corresponding focusing position of zoom [i-1] difference in N number of zoom position
Put FocusReal zoom [i]And FocusReal zoom [i-1]；And, the arbitrary neighborhood two is obtained according to the theoretical zoom tracking curve of camera lens
Zoom position zoom [i] and the corresponding focusing position Focus of zoom [i-1]Manage zoom [i]And FocusManage zoom [i-1]；C, calculate respectively
Zoom [i] and the focusing deviant focusoffset of zoom [i-1] positionzoom[i]And focusoffsetzoom[i-1]：
focusoffsetzoom[i]=FocusReal zoom [i]-FocusManage zoom [i],
focusoffsetzoom[i-1]=FocusReal zoom [i-1]-FocusManage zoom [i-1]；
Any zoom position between D, the described two zoom position zoom [i] of arbitrary neighborhood of calculating and zoom [i-1]
The corresponding focusing offset focusoffset of zoomzoom：
E, any zoom position calculated between described two zoom position zoom [i] of arbitrary neighborhood and zoom [i-1] are corresponding
Actual focusing position FocusReal zoom：FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is according to mirror
The corresponding focusing positions of the zoom position zoom that the theoretical zoom tracking curve of head is obtained.
The theoretical zoom tracking curve of the camera lens is the original theoretical zoom tracking curve that camera lens manufacturer provides.
The theoretical zoom tracking curve of the camera lens is the theoretical zoom tracking curve updated；Wherein obtain the theory of the renewal
Zoom tracking curve includes：A, M zoom position for determining camera lens；B, by original theoretical zoom tracking curve respectively in zoom
K translation is carried out on direction and focusing direction；And calculate the theoretical focusing position and reality of M zoom position after each translation
The total deviation of focusing position；Total deviation after c, each time of comparison translation is to determine the total deviation of minimum, the minimum total deviation pair
Theoretical zoom tracking curve after the translation answered as renewal theoretical zoom tracking curve.
Preferably, calculate M zoom position after each translation theoretical focusing position and actual focusing position it is total inclined
Difference includes：Theoretical zoom tracking curve after being translated for each time, confirms described M according to the theoretical aircraft pursuit course after the translation
The corresponding M theoretical focusing position of zoom position；And the corresponding M reality of the M zoom position is determined according to auto-focusing algorithm
Border focusing position；Calculate the deviation of described M theoretical focusing position and corresponding actual focusing position respectively again, and according to this M
Individual deviation obtains the total deviation after each translation.
Preferably, it is determined that N number of zoom position for N number of zoom position of each curvature can be covered；Wherein each is bent
Rate refers to using zoom position as abscissa, and with zoom position, corresponding each actual focusing position subtracts the difference of theoretical focusing position respectively
It is worth for ordinate, the P zoom position difference that corresponding each actual focusing position subtracts theoretical focusing position respectively is connected into
Each bent curvature of a curve, N<P.
The means for correcting of the zoom tracking curve, including：Zoom position determining module, N number of zoom for determining camera lens
Position；Actual focusing position determining module, for determining arbitrary neighborhood two in N number of zoom position according to auto-focusing algorithm
The corresponding focusing position Focus of zoom position zoom [i] and zoom [i-1] differenceReal zoom [i]And FocusReal zoom [i-1]；It is theoretical right
Burnt position determination module, for obtaining described two zoom position zoom of arbitrary neighborhood according to the theoretical zoom tracking curve of camera lens
[i] and the corresponding focusing position Focus of zoom [i-1]Manage zoom [i]And FocusManage zoom [i-1]；Focusing deviant computing module, is used for
Calculate the focusing deviant focusoffset of zoom [i] and zoom [i-1] positionzoom[i]And focusoffsetzoom[i-1]：
focusoffsetzoom[i]=FocusReal zoom [i]-FocusManage zoom [i], focusoffsetzoom[i-1]=FocusReal zoom [i-1]-
FocusManage zoom [i-1]；And for calculating any change between described two zoom position zoom [i] of arbitrary neighborhood and zoom [i-1]
The corresponding focusing offset of burnt position zoom：
Actual focusing position correction module, for calculate described two zoom position zoom [i] of arbitrary neighborhood and zoom [i-1] it
Between the corresponding actual focusing position Focus of any zoom positionReal zoom：
FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is the theoretical zoom according to camera lens
The corresponding focusing positions of the zoom position zoom that aircraft pursuit course is obtained.
The theoretical zoom tracking curve of the camera lens is the theoretical zoom tracking curve updated；Wherein obtain the theory of the renewal
Zoom tracking curve is performed by following modules of the means for correcting：Zoom position determining module, the M change for determining camera lens
Burnt position；Translate total deviation computing module, for by original theoretical zoom tracking curve respectively in zooming direction and focusing side
K translation is carried out upwards；And calculate M zoom position after each translation theoretical focusing position and actual focusing position it is total
Deviation；Update curve determining module, for comparing the total deviation after each translation to determine minimum total deviation, the minimum it is total
Theoretical zoom tracking curve after the corresponding translation of deviation as renewal theoretical zoom tracking curve.
Preferably, translation total deviation computing module calculate M zoom position after each translation theoretical focusing position and
The total deviation of actual focusing position includes：Theoretical zoom tracking curve after being translated for each time, according to the theory after the translation
Aircraft pursuit course confirms the corresponding M theoretical focusing position of the M zoom position；And determine the M according to auto-focusing algorithm
The corresponding M actual focusing position of zoom position；Calculate described M theoretical focusing position and corresponding actual focusing position respectively again
The deviation put, and the total deviation after each translation is obtained according to this M deviation.
Compared to prior art, the zoom tracking curve corrected according to the inventive method image during zoom is followed has
Good definition performance.
Brief description of the drawings
Fig. 1 is that the theoretical variable-focus tracing curve of a camera lens and actual variable-focus tracing curve are illustrated.
Fig. 2 is the flow chart of the embodiment of the present invention one.
Fig. 3 is the mark example of the parameter that is related to of Fig. 2 embodiments one on the diagram.
Fig. 4 is definition appraisal curve example.
Fig. 5 is the flow chart of the embodiment of the present invention two.
Fig. 6 is the corresponding illustration figure of embodiment two.
Fig. 7 is zoom tracking curve means for correcting building-block of logic in an example.
Fig. 8 is zoom tracking curve means for correcting building-block of logic in another example.
Embodiment
The present invention according to the theoretical zoom tracking curve of camera lens and, actual zoom tracking curve and theoretical zoom tracking curve
Between difference value calculate corrected after zoom tracking curve so that during follow-up zoom is followed, image is as far as possible
Keep clear.Described in detail below by way of embodiment.
Embodiment one
Embodiment one gives zoom tracking curve bearing calibration, and this method is elaborated below in conjunction with Fig. 2 and Fig. 3.
S21, the N number of zoom position for determining camera lens.
S22, determined in N number of zoom position according to auto-focusing algorithm two zoom position zoom [i] of arbitrary neighborhood and
The corresponding focusing position Focus of zoom [i-1] differenceReal zoom [i]And FocusReal zoom [i-1]。
Carrying out carrying out based on auto-focusing algorithm when focusing position is determined for selected zoom position.It please join figure
Definition appraisal curve shown in 4, wherein abscissa represent the relative value of focusing position, and ordinate represents focus degree evaluation
Value.It is determined that a certain zoom position on, by changing focusing position, and be based on each focusing position auto-focusing algorithm
The definition values of image are calculated, one of definition evaluation of estimate maximum on a definition appraisal curve, the curve can be drawn out
Point (point marked as 1 in Fig. 4 to iris out) corresponding focusing position is the described corresponding focusing position of a certain zoom position
Put.Based on this, it is right that we can be obtained by two zoom position zoom [i] of arbitrary neighborhood and zoom [i-1] in N number of zoom position
The focusing position Focus answeredReal zoom [i]And FocusReal zoom [i-1]。
S23, obtained according to the theoretical zoom tracking curve of camera lens described two zoom position zoom [i] of arbitrary neighborhood and
The corresponding focusing position Focus of zoom [i-1]Manage zoom [i]And FocusManage zoom [i-1]。
Here theoretical zoom tracking curve is the original theoretical zoom tracking curve that camera lens manufacturer provides.
S24, the focusing offset focusoffset for calculating zoom [i] and zoom [i-1] position respectivelyzoom[i]With
focusoffsetzoom[i-1]：
focusoffsetzoom[i]=FocusReal zoom [i]~FocusManage zoom [i],
focusoffsetzoom[i-1]=FocusReal zoom [i-1]~FocusManage zoom [i-1]；
Any zoom position between S25, the described two zoom position zoom [i] of arbitrary neighborhood of calculating and zoom [i-1]
The corresponding focusing offset focusoffset of zoomzoom：
Any zoom position between S26, the described two zoom position zoom [i] of arbitrary neighborhood of calculating and zoom [i-1]
Corresponding actual focusing position FocusReal zoom：
FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is the theoretical zoom according to camera lens
The corresponding focusing positions of the zoom position zoom that aircraft pursuit course is obtained.
Just obtained by the above method between zoom [i] and zoom [i-1] after any corresponding correction of zoom position
Focusing position, is the adjacent zoom position of any two in N number of zoom position due to zoom [i] and zoom [i-1], so this
Sample just can obtain the focusing position of the corresponding correction of all zoom positions, that is, the zoom tracking curve corrected.
In addition, for N number of zoom position in step S21, being preferably selected some typical positions.The typical position can
To be that can cover N number of zoom position of each curvature, each curvature here refers to using zoom position as abscissa, with zoom
The position difference that corresponding each actual focusing position subtracts theoretical focusing position respectively is ordinate, and P zoom position is distinguished
If the curvature for the stem curve that the difference that corresponding each actual focusing position subtracts theoretical focusing position is connected into, N<P.Enter one below
For example step illustrates.
For example, zoom length is 1000, chooses zoom position 0,10,20 ... 1000, it is assumed that totally 100 positions；According to
Theoretical zoom tracking curve obtains the corresponding 100 theoretical focusing positions of this 100 zoom position difference；Simultaneously according to automatic poly-
Burnt algorithm obtains this 100 zoom positions and distinguishes corresponding 100 actual focusing positions.Respectively with this 100 actual positions of focusing
Put and subtract corresponding 100 theoretical focusing positions and obtain 100 differences.Using zoom position as abscissa, difference is ordinate, will
100 points (focusing position, difference) connect, if the curve different by dry buckling is obtained.Close curvature can be worked as same
Individual curvature is handled.Actual test is found, will typically produce 3-6 different curvature.At this moment we, which just choose, to cover
The zoom position of each curvature is used as foregoing N number of zoom position.The zoom position selected in step S21 is more typical, the knot of correction
Fruit is relatively more preferable.
In addition, it is necessary to sequencing not strict between explanation, some steps of embodiment one, such as step
Between S22 and S23.So the ordinal relation between each step given by embodiment one should not regard the limit to the present invention as
System.
Based on same design, the present invention also provides a kind of means for correcting of zoom tracking curve.It please join Fig. 7, the device
Calculated including zoom position determining module, actual focusing position determining module, theoretical focusing position determining module, focusing deviant
Module and actual focusing position correction module.
Wherein, the zoom position determining module, N number of zoom position for determining camera lens.
Actual focusing position determining module, for determining arbitrary neighborhood in N number of zoom position according to auto-focusing algorithm
Two zoom position zoom [i] and the corresponding focusing position Focus of zoom [i-1] differenceReal zoom [i]And FocusReal zoom [i-1]。
Theoretical focusing position determining module, for obtaining the arbitrary neighborhood two according to the theoretical zoom tracking curve of camera lens
Individual zoom position zoom [i] and the corresponding focusing position Focus of zoom [i-1]Manage zoom [i]And FocusManage zoom [i-1]。
Focusing deviant computing module, the focusing deviant for calculating zoom [i] and zoom [i-1] position
focusoffsetzoom[i]And focusoffsetzoom[i-1]：focusoffsetzoom[i]=FocusReal zoom [i]-FocusManage zoom [i],
focusoffsetzoom[i-1]=FocusReal zoom [i-1]-FocusManage zoom [i-1]；And for calculating described two zoom positions of arbitrary neighborhood
Put the corresponding focusing offsets of any zoom position zoom between zoom [i] and zoom [i-1]：
Actual focusing position correction module, for calculating described two zoom position zoom [i] of arbitrary neighborhood and zoom [i-
1] the corresponding actual focusing position Focus of any zoom position betweenReal zoom：
FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is the theoretical zoom according to camera lens
The corresponding focusing positions of the zoom position zoom that aircraft pursuit course is obtained.
The theoretical zoom for the camera lens that above-mentioned zoom tracking curve means for correcting is used during correction zoom tracking curve
Aircraft pursuit course is the original theoretical zoom tracking curve that camera lens manufacturer provides.
Embodiment two
In order that the correction result for obtaining theoretical zoom tracking curve is more preferable, the present embodiment provides a kind of more excellent method,
This method helps to find the optimal zooming range of camera lens.This method is further improved on the basis of embodiment one：
Firstly the need of being translated to theoretical zoom tracking curve to obtain more excellent theoretical zoom tracking curve, then again on the basis of this
The corresponding focusing offset focusoffset of any zoom position zoom are calculated by the method for embodiment onezoom, so that
Obtain actual focusing position FocusReal zoom.The embodiment of the present invention two is described below in conjunction with Fig. 5.
S31, M zoom position for selecting camera lens.
Here M can be equal with the N of embodiment one, that is, selects the zoom position of identical quantity；And these zooms position
Put the zoom position that can also be selected with embodiment one just the same.
S32, by original theory aircraft pursuit course respectively zooming direction and focusing direction on carry out k time translate；And calculate each
The theoretical focusing position of M zoom position after secondary translation and the total deviation of actual focusing position.
Translated for the original theory aircraft pursuit course that camera lens manufacturer provides.M zoom position after each translation
The total deviation of theoretical focusing position and actual focusing position can be calculated as follows：After for once translating it is theoretical with
Track curve, the corresponding M theoretical focusing position of the M zoom position is confirmed according to the theoretical aircraft pursuit course after the translation；And
The corresponding M actual focusing position of the M zoom position is determined according to auto-focusing algorithm；Calculate the M theory respectively again
The deviation of focusing position and corresponding actual focusing position, and the total deviation after this time translation is obtained according to this M deviation.
Here M deviation can use the poor absolute value of actual focusing position " theoretical focusing position subtract " or " reason
Poor square of actual focusing position is subtracted by focusing position " represent.Total deviation then can with M deviation and represent.
Total deviation after S33, each time of comparison translation is to determine the total deviation of minimum, the corresponding translation of the minimum total deviation
Theoretical zoom tracking curve afterwards as renewal theoretical zoom tracking curve.
Each total deviation can be seen that according to calculation procedure above and correspond to the theoretical zoom tracking song after a translation
Line.If the corresponding total deviation of theoretical zoom tracking curve after translation is minimum, it is considered that the theoretical zoom after the translation
Aircraft pursuit course reaches a comparatively ideal correction position, is renewal referred to here as the theoretical zoom tracking curve on the correction position
Theoretical zoom tracking curve.If subsequently based on the theoretical zoom tracking curve of the renewal, further according to embodiment
One method carries out the compensation of focusing offset, and that will obtain the zoom tracking curve after correction of a final proof of the embodiment of the present invention.
S34, described two zoom position zoom [i] of arbitrary neighborhood are obtained according to the theoretical zoom tracking curve of the renewal
The corresponding focusing position Focus with zoom [i-1]Manage zoom [i]And FocusManage zoom [i-1]。
S35, the focusing deviant focusoffset for calculating zoom [i] and zoom [i-1] position respectivelyzoom[i]With
focusoffsetzoom[i-1]：
focusoffsetzoom[i]=FocusReal zoom [i]-FocusManage zoom [i],
focusoffsetzoom[i-1]=FocusReal zoom [i-1]-FocusManage zoom [i-1]；
Wherein, FocusReal zoom [i]And FocusReal zoom [i-1]It is that the zoom position determined according to auto-focusing algorithm is respectively
Zoom [i] and the corresponding focusing positions of zoom [i-1].
Here zoom position zoom [i] and zoom [i-1] can be the zoom position of step S31 selections in the present embodiment
Put；It can also be the zoom position selected in the step S21 of embodiment one, or can also be the zoom position newly selected.
Any zoom position between S36, the described two zoom position zoom [i] of arbitrary neighborhood of calculating and zoom [i-1]
The corresponding focusing offset focusoffset of zoomzoom：
Any zoom position between S37, the described two zoom position zoom [i] of arbitrary neighborhood of calculating and zoom [i-1]
Corresponding actual focusing position FocusReal zoom：
FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is the theory according to above-mentioned renewal
The corresponding focusing positions of the zoom position zoom that zoom tracking curve is obtained.
The corresponding actual focusing of any zoom position between zoom [i] and zoom [i-1] has just been obtained by the above method
Position, is the adjacent zoom position of any two in zoom position due to zoom [i] and zoom [i-1], so thus can
The corresponding actual focusing position of all zoom positions, i.e. actual zoom tracking curve are obtained, so as to complete to theoretical zoom
The correction of aircraft pursuit course.
With reference to Fig. 6, embodiment two is further explained.
1. curve is the original zoom tracking curve that camera lens manufacturer provides, and 2. curve is that 1. curve passes through on zooming direction
3. the zoom tracking curve obtained after once translating, curve is curve 1. on zooming direction and focusing direction respectively through once
The zoom tracking curve obtained after translation.
Assuming that zoom1~zoom10 in 10 zoom positions of selection, ginseng figure.For zoom position zoom1~zoom10,
2. can be obtained according to zoom tracking curve focusing position Focus21 of this 10 zoom positions on the curve, Focus22,
Focus23, Focus24, Focus25, Focus26, Focus27, Focus28, Focus29, Focus210, i.e. curve 2. on
The ordinate of 10 stains.This 10 zoom position correspondences of zoom1~zoom10 can be respectively obtained according to auto-focusing algorithm
Actual focusing position Focus01, Focus02, Focus03, Focus04, Focus05, Focus06, Focus07,
10 soft dots in Focus08, Focus09, Focus010, i.e. figure.Can thus calculate curve 2. on 10
Theoretical focusing position Focus21, Focus22, Focus23, Focus24, Focus25, Focus26, Focus27, Focus28,
Focus29, Focus210 and actual focusing position Focus01, Focus02, Focus03, Focus04, Focus05,
Focus06, Focus07, Focus08, Focus09, Focus010 deviation.If representing deviation with the mode of absolute value, this
10 deviations are respectively | Focus21-Focus01 |, | Focus22-Focus02 |, | Focus23-Focus03 |, | Focus24-
Focus04|、|Focus25-Focus05|、|Focus26-Focus06|、|Focus27-Focus07|、|Focus28-
Focus08|、|Focus29-Focus09|、|Focus210-Focus010|；Then translation curve is obtained according to this 10 deviations 2.
Total deviation be：Similar, if being represented with variance, the total deviation is：
It 3. can be calculated for curve with above-mentioned identical method and obtain the corresponding total deviation Off of focusing position thereon3：OrHere
Focus3i (i be equal to 1~10) for this 10 zoom positions of zoom1~zoom10 curve 3. on corresponding focusing position.
Then Off2 and Off3 size are compared, it is assumed that Off3 value is small, then 2. 3. curve be better than curve, 3. curve will be made
For new theoretical zoom tracking curve, being then based on new theoretical zoom tracking curve progress, further calculating obtains final
Correct zoom tracking curve.
For two zoom positions of arbitrary neighborhood, such as zoom2 and zoom3, based on new theoretical zoom tracking curve,
Its corresponding focusing position is Focus32 and Focus33, and its actual corresponding focusing position is Focus02 and Focus03,
Then focusoffsetzoom2=Focus32-Focus02；focusoffsetzoom3=Focus33-Focus03.For zoom position
Put any zoom position zoom between zoom2 and zoom3, its focusing position FocusReal zoomFor：FocusReal zoom=
FocusManage zoom+
FocusManage zoomFor new theoretical zoom tracking curve, i.e. curve 3. on, the corresponding focusing position in zoom positions.
It can be calculated by same method and obtain zoom1 and zoom2, appointing between the zoom position such as zoom3 and zoom4
The actual focusing position of meaning position, so as to can be obtained by the focusing position of any zoom position of camera lens, that is, is completed to new
Theoretical aircraft pursuit course further correction, the correction result is closer to actual zoom tracking curve.
In the above example, only exemplified by translating two obtained curves.If in fact, camera lens manufacturer on zooming direction
The original zoom tracking curve provided can be translated can translate m steps on n steps, focusing direction, then can obtain altogether after the translation of m*n bars
Curve.The total deviation Off that every curve can be calculated according to preceding method, so as to obtain one of total deviation minimum
Translation curve.The curve that participation total deviation compares is more, and the new Zoom Theory aircraft pursuit course generally yielded is more preferable, follow-up
The correction of a final proof result arrived is also closer to actual zoom tracking curve.
In addition, in above-mentioned calculating process, the zoom position of selection is more, the new Zoom Theory tracking generally yielded is bent
Line is also more preferable, and final correction result is also closer to actual zoom tracking curve.
It is demonstrated experimentally that the correction zoom tracking curve that technical scheme is obtained is during zoom tracking, image
With higher definition.
Based on same design, the present invention also provides a kind of means for correcting of zoom tracking curve.It please join Fig. 8, the correction
Device includes：Zoom position determining module, translation total deviation computing module, renewal curve determining module, actual focusing position are true
Cover half block, theoretical focusing position determining module, focusing deviant computing module and actual focusing position correction module.
Wherein, zoom position determining module, actual focusing position determining module, theoretical focusing position determining module, focusing
Deviant computing module and actual focusing position correction module have and Fig. 7 means for correcting identical functions.But, theory focusing
Position determination module is it is determined that use the zoom tracking curve of renewal when theoretical focusing position；Actual focusing position school
The theoretical focusing position that positive module is used when focusing position is corrected is also to be obtained according to the zoom tracking curve of renewal.
And can be by zoom position determining module, translation total deviation computing module, more for the zoom tracking curve of renewal
New curve determining module is obtained, specific as follows：
Zoom position determining module, the M zoom position for determining camera lens.
Translate total deviation computing module, for by original theoretical zoom tracking curve respectively in zooming direction and focusing side
K translation is carried out upwards；And calculate M zoom position after each translation theoretical focusing position and actual focusing position it is total
Deviation.
Curve determining module is updated, for comparing the total deviation after each translation to determine minimum total deviation, the minimum
The corresponding translation of total deviation after theoretical zoom tracking curve as renewal theoretical zoom tracking curve.
The theoretical focusing position and reality that the translation total deviation computing module calculates M zoom position after each translation are right
The total deviation of burnt position includes：Theoretical zoom tracking curve after being translated for each time, it is bent according to the theoretical tracking after the translation
The corresponding M theoretical focusing position of M zoom position described in line justification；And the M zoom position is determined according to auto-focusing algorithm
Put corresponding M actual focusing position；Calculate the inclined of described M theoretical focusing position and corresponding actual focusing position respectively again
Difference, and the total deviation after each translation is obtained according to this M deviation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. a kind of bearing calibration of zoom tracking curve, it is characterised in that this method includes：
A, the N number of zoom position for determining camera lens；
B, two zoom position zoom [i] of arbitrary neighborhood and zoom [i- in N number of zoom position determined according to auto-focusing algorithm
1] the corresponding focusing position Focus of differenceReal zoom [i]And FocusReal zoom [i-1]；And, obtained according to the theoretical zoom tracking curve of camera lens
To described two zoom position zoom [i] of arbitrary neighborhood and the corresponding focusing position Focus of zoom [i-1]Manage zoom [i]With
FocusManage zoom [i-1]；
C, the focusing deviant focusoffse t for calculating zoom [i] and zoom [i-1] position respectivelyzoom[i]And focusoffse
tzoom[i-1]：
focusoffsetzoom[i]=FocusReal zoom [i]-FocusManage zoom [i],
focusoffse tzoom[i-1]=FocusReal zoom [i-1]~FocusManage zoom [i-1]；
Zoom pairs of any zoom position between D, the described two zoom position zoom [i] of arbitrary neighborhood of calculating and zoom [i-1]
The focusing offset focusoffset answeredzoom：
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E, any zoom position calculated between described two zoom position zoom [i] of arbitrary neighborhood and zoom [i-1] are corresponding
Actual focusing position FocusReal zoom：
FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is that song is tracked according to the theoretical zoom of camera lens
The corresponding focusing positions of the zoom position zoom that line is obtained.
2. the bearing calibration of zoom tracking curve as claimed in claim 1, it is characterised in that the theoretical zoom of the camera lens with
Track curve is the original theoretical zoom tracking curve that camera lens manufacturer provides.
3. the bearing calibration of zoom tracking curve as claimed in claim 1, it is characterised in that the theoretical zoom of the camera lens with
Track curve is the theoretical zoom tracking curve updated；
Wherein obtaining the theoretical zoom tracking curve of the renewal includes：
A, M zoom position for determining camera lens；
B, by original theoretical zoom tracking curve respectively zooming direction and focusing direction on carry out k time translate；And calculate each
The theoretical focusing position of M zoom position after secondary translation and the total deviation of actual focusing position；
Total deviation after c, each time of comparison translation is to determine the total deviation of minimum, the reason after the corresponding translation of minimum total deviation
By theoretical zoom tracking curve of the zoom tracking curve as renewal.
4. the bearing calibration of zoom tracking curve as claimed in claim 3, it is characterised in that after each translation of calculating
The total deviation of the theoretical focusing position and actual focusing position of M zoom position includes：Theoretical zoom after being translated for each time
Aircraft pursuit course, the corresponding M theoretical focusing position of the M zoom position is confirmed according to the theoretical aircraft pursuit course after the translation；
And the corresponding M actual focusing position of the M zoom position is determined according to auto-focusing algorithm；Calculate the M reason respectively again
The total deviation after each translation is obtained by the deviation of focusing position and corresponding actual focusing position, and according to this M deviation.
5. the bearing calibration of zoom tracking curve as claimed in claim 3, it is characterised in that N number of zoom position of the determination
N number of zoom position of each curvature can be covered by being set to；Wherein each curvature refers to using zoom position as abscissa, with zoom position
Put corresponding each actual focusing position respectively and subtract the difference of theoretical focusing position for ordinate, P zoom position is right respectively
Each bent curvature of a curve that the difference that each actual focusing position answered subtracts theoretical focusing position is connected into, N<P.
6. a kind of means for correcting of zoom tracking curve, it is characterised in that the device includes：
Zoom position determining module, N number of zoom position for determining camera lens；
Actual focusing position determining module, for determining arbitrary neighborhood two in N number of zoom position according to auto-focusing algorithm
The corresponding focusing position Focus of zoom position zoom [i] and zoom [i-1] differenceReal zoom [i]And FocusReal zoom [i-1]；
Theoretical focusing position determining module, for obtaining described two changes of arbitrary neighborhood according to the theoretical zoom tracking curve of camera lens
Burnt position zoom [i] and the corresponding focusing position Focus of zoom [i-1]Manage zoom [i]And FocusManage zoom [i-1]；
Focusing deviant computing module, the focusing deviant focusoffse for calculating zoom [i] and zoom [i-1] position
tzoom[i]With focusoffse tzoom[i-1]：focusoffsetzoom[i]=FocusReal zoom [i]-FocusManage zoom [i],
focusoffse tzoom[i-1]=FocusReal zoom [i-1]-FocusManage zoom [i-1]；And for calculating described two zooms of arbitrary neighborhood
The corresponding focusing offsets of any zoom position zoom between position zoom [i] and zoom [i-1]：
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Actual focusing position correction module, for calculate described two zoom position zoom [i] of arbitrary neighborhood and zoom [i-1] it
Between the corresponding actual focusing position Focus of any zoom positionReal zoom：
FocusReal zoom=FocusManage zoom+focusoffsetzoom；Wherein FocusManage zoomIt is that song is tracked according to the theoretical zoom of camera lens
The corresponding focusing positions of the zoom position zoom that line is obtained.
7. the means for correcting of zoom tracking curve as claimed in claim 6, it is characterised in that the theoretical zoom of the camera lens with
Track curve is the original theoretical zoom tracking curve that camera lens manufacturer provides.
8. the means for correcting of zoom tracking curve as claimed in claim 6, it is characterised in that the theoretical zoom of the camera lens with
Track curve is the theoretical zoom tracking curve updated；
The theoretical zoom tracking curve for wherein obtaining the renewal is performed by following modules of the means for correcting：
Zoom position determining module, the M zoom position for determining camera lens；
Translate total deviation computing module, for by original theoretical zoom tracking curve respectively zooming direction and focusing direction
Carry out k translation；And calculate M zoom position after each translation theoretical focusing position and actual focusing position it is total inclined
Difference；
Update curve determining module, for comparing the total deviation after each translation to determine minimum total deviation, the minimum it is total
Theoretical zoom tracking curve after the corresponding translation of deviation as renewal theoretical zoom tracking curve.
9. the means for correcting of zoom tracking curve as claimed in claim 8, it is characterised in that the translation total deviation calculates mould
The total deviation that block calculates the theoretical focusing position and actual focusing position of M zoom position after each translation includes：For each
Theoretical zoom tracking curve after secondary translation, the M zoom position correspondence is confirmed according to the theoretical aircraft pursuit course after the translation
M theoretical focusing position；And the corresponding M actual focusing position of the M zoom position is determined according to auto-focusing algorithm；Again
The deviation of described M theoretical focusing position and corresponding actual focusing position is calculated respectively, and is obtained each time according to this M deviation
Total deviation after translation.
10. the means for correcting of zoom tracking curve as claimed in claim 8, it is characterised in that N number of zoom position of the determination
N number of zoom position of each curvature can be covered by being set to；Wherein each curvature refers to using zoom position as abscissa, with zoom position
Put corresponding each actual focusing position respectively and subtract the difference of theoretical focusing position for ordinate, P zoom position is right respectively
Each bent curvature of a curve that the difference that each actual focusing position answered subtracts theoretical focusing position is connected into, N<P.
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| CN106303190B (en) * | 2015-05-25 | 2019-08-30 | 深圳市福斯康姆智能科技有限公司 | Zoom tracking curve antidote and device |
| CN104980661B (en) * | 2015-07-10 | 2018-10-09 | 武汉烽火众智数字技术有限责任公司 | A kind of method and apparatus of pick-up lens self-correcting |
| CN106813635B (en) * | 2015-12-02 | 2019-12-03 | 南宁富桂精密工业有限公司 | A kind of bearing calibration of lens motor focusing curve and device |
| CN105578048B (en) * | 2015-12-23 | 2019-02-22 | 北京奇虎科技有限公司 | A kind of quick focusing method and device, mobile terminal |
| CN105554387A (en) * | 2015-12-23 | 2016-05-04 | 北京奇虎科技有限公司 | Zoom tracking curve correction method and device |
| CN105611159A (en) * | 2015-12-23 | 2016-05-25 | 北京奇虎科技有限公司 | Calibration method and device of zooming tracking curve |
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| CN106341598A (en) * | 2016-09-14 | 2017-01-18 | 北京环境特性研究所 | Optical-lens automatic focusing system and method thereof |
| CN106507102B (en) * | 2016-11-18 | 2018-09-18 | 浙江宇视科技有限公司 | A kind of lens correction method and device |
| CN106657787A (en) * | 2016-12-28 | 2017-05-10 | 天津天地伟业生产力促进有限公司 | Fast correction method for zoom tracking curve |
| CN107592464B (en) * | 2017-09-30 | 2019-09-17 | 浙江大华技术股份有限公司 | Zoom follows the switching method and device of curve during a kind of zoom |
| CN108259760B (en) * | 2018-03-22 | 2020-05-26 | 浙江大华技术股份有限公司 | Zoom focusing compensation method and device for dome camera |
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| CN110121068B (en) * | 2019-04-02 | 2020-06-23 | 浙江大华技术股份有限公司 | Point selection method and device of zoom following curve and storage medium |
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