CN101873425A - Focus offset compensating device and method of surveillance camera - Google Patents
Focus offset compensating device and method of surveillance camera Download PDFInfo
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- CN101873425A CN101873425A CN200910050086A CN200910050086A CN101873425A CN 101873425 A CN101873425 A CN 101873425A CN 200910050086 A CN200910050086 A CN 200910050086A CN 200910050086 A CN200910050086 A CN 200910050086A CN 101873425 A CN101873425 A CN 101873425A
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Abstract
The invention relates to a focus offset compensating device and method of a surveillance camera. The method comprises the following steps: if the shooting mode of the surveillance camera is a day mode, an IR-cut filter is arranged on the front end of an imaging element; if the shooting mode is a night mode, a glass sheet is arranged at the front end; variable control is performed to the position of the focus lens according to the focus offset caused by the differences of the material and thicknesses of the IR-cut filter and the glass sheet; and when a zoom motion is executed and the current shooting mode is the day mode, variable control is performed to the position of the focus lens according to the focus offset value caused by the infrared ray. Therefore, the effective compensation can be performed for the focus offset caused by the switchover of the shooting mode, the zoom motion and the preset of alternation motions, and a shot subject is shot under more accurate focus state.
Description
Technical field
The present invention relates to the focus offset compensating device and the method for monitoring camera, it relate to such as the screening-mode when monitoring camera be switched to daytime (Day) pattern or night (Night) pattern or when carrying out zoom (Zoom) or presetting (Preset) change action, be used for focus offset (Offset) compensation arrangement and the method for the monitoring camera that compensates at focus offset.
Background technology
Generally, the monitoring camera that uses that is connected with digital video recorder (DVR:Digital Video Recorder) all is installed in specific place, thereby subject is taken.The image of the subject that above-mentioned monitoring camera is taken is sent in the above-mentioned digital video recorder, is stored in the middle of the hard disk or by display picture to show.
In addition, the screening-mode of above-mentioned monitoring camera be divided into daytime (Day) pattern and night (Night) pattern, if screening-mode is set to day mode, the front end of CCD imaging apparatuss such as (Charge Coupled Device) just is installed cutoff filter (IR Cut Filter), prevents that infrared ray (IR) from inciding on the above-mentioned imaging apparatus too much.
On the contrary, if screening-mode is set to night mode, the cutoff filter that is installed in the front end of above-mentioned imaging apparatus is just substituted by transparent blank glass sheet (Dummy Glass), so that during carrying out taking action night, prevents that above-mentioned cutoff filter from stopping that light injects.
But, when the screening-mode of monitoring camera switches to night mode or when night mode switches to day mode from day mode, owing to factor such as on material and thickness, there are differences between above-mentioned cutoff filter and the blank glass sheet, the problem of focus offset will take place.
Simultaneously, the screening-mode that it also exists at monitoring camera is under the night mode state, when carrying out the zoom action, the problem of focus offset takes place when infrared ray is injected on the imaging apparatus by the blank glass sheet.
And, it also exists in execution and presets action, just utilize when the shooting state of monitoring camera being changed according to pan (Pan) angle, inclination (Tilt) angle and zoom (Zoom) multiplying power that preset (Preset) information setting in advance, if screening-mode when preset information is correlated with in setting and current screening-mode are inconsistent, will be owing on material and thickness, there are differences between cutoff filter and the blank glass sheet, thus the problem of focus offset takes place.
Summary of the invention
The object of the present invention is to provide a kind of focus offset compensating device and method of monitoring camera, it is switching to night mode or such as the screening-mode of monitoring camera when night mode switches to day mode or when carrying out the zoom action or presetting the change action from day mode, can be according to being used alternatingly the focus offset value that causes between cutoff filter and the blank glass sheet mutually, variable control is carried out in position at focal length lens, thereby focusing departs from and compensates.
In order to achieve the above object, focus offset compensation method according to monitoring camera of the present invention comprises following step: if the screening-mode of monitoring camera switches to night mode from day mode, just the cutoff filter that is installed in the imaging apparatus front end is replaced to the step of blank glass sheet; And, come the step of carrying out variable control at the position of focal length lens according to owing to change the focus offset value that the blank glass sheet causes into.
And, the focus offset compensation method of above-mentioned monitoring camera also comprises following step: if the screening-mode of above-mentioned monitoring camera switches to day mode from night mode, just the blank glass sheet that is installed in the imaging apparatus front end is replaced to the step of cutoff filter; And, come the step of carrying out variable control at the position of focal length lens according to owing to change the focus offset value that cutoff filter causes into.
And, in the focus offset compensation method of above-mentioned monitoring camera, above-mentioned focus offset value is at owing to there are differences the focus offset that is caused between cutoff filter and the blank glass sheet on material and thickness and compensate, and the result of the test value that stores in advance and manage.
In addition, also be to comprise following step according to the feature of focus offset compensation method that with the present invention is the monitoring camera of foundation: when monitoring camera is carried out the zoom action, whether be the step that night mode is differentiated to current screening-mode; And if above-mentioned judged result is night mode, just the step of coming the position of focusing camera lens to carry out variable control according to the focus offset value that infrared ray caused.
In addition, in the focus offset compensation method of above-mentioned monitoring camera, above-mentioned focus offset value be for compensation infrared ray under night mode at the focus offset that is caused when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage is the value that to change to the multiple amplification and increase gradually in order to dwindle from multiple.
And, comprise following step according to the focus offset compensation method of monitoring camera of the present invention: carry out when presetting the change action step that the screening-mode when setting relevant preset information is confirmed at monitoring camera; And if the screening-mode after the above-mentioned affirmation and current screening-mode are inconsistent, the focus offset value that causes when replacing blank glass sheet or cutoff filter just, the step of carrying out variable control at the position of focal length lens.
And in the focus offset compensation method of above-mentioned monitoring camera, in the middle of above-mentioned preset information, also storing and being used for being presented at the screening-mode of setting when being correlated with preset information is the day mode or the identifying information of night mode.
In the focus offset compensation method of above-mentioned monitoring camera, above-mentioned focus offset value is the focus offset that causes by there are differences on material and thickness between above-mentioned cutoff filter and the blank glass sheet in order to compensate, and the result of the test value that stores in advance and manage.
In addition, in the focus offset compensation method of above-mentioned monitoring camera, also comprise when carrying out above-mentioned zoom action of presetting the change action, if current screening-mode is a night mode, the focus offset value that causes according to infrared ray just, the step of carrying out variable control at the position of focal length lens.
And, in the focus offset compensation method of above-mentioned monitoring camera, above-mentioned focus offset value be for compensation infrared ray under night mode at the focus offset that causes when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage.
In addition, focus offset compensating device according to monitoring camera of the present invention, comprise following part: just install cutoff filter if screening-mode is a day mode at the front end of imaging apparatus, and if screening-mode is night mode is just installed the blank glass sheet at the front end of imaging apparatus a driven tool; And according to the focus offset value that the blank glass sheet is caused, the control tool that carries out variable control at the position of focal length lens are installed.
And in the focus offset compensating device of above-mentioned monitoring camera, above-mentioned control tool carries out variable control according to because the focus offset value that above-mentioned cutoff filter causes is installed at the position of focal length lens.
And, in the focus offset compensating device of above-mentioned monitoring camera, above-mentioned focus offset value is in order to compensate owing to there are differences the focus offset that is caused between above-mentioned cutoff filter and the blank glass sheet on material and thickness, and the result of the test value that stores in advance and manage.
In addition, focus offset compensating device according to monitoring camera of the present invention, comprise following part: just install cutoff filter if screening-mode is a day mode at the front end of imaging apparatus, and if screening-mode is the driven tool that night mode is just installed the blank glass sheet; And when carrying out the zoom action,,, carry out the control tool of variable control at the position of focal length lens just according to the focus offset value that infrared ray caused if current screening-mode is a night mode.
And, in the focus offset compensating device of above-mentioned monitoring camera, above-mentioned focus offset value be for compensation infrared ray under night mode at the focus offset that is caused when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage is the value that to change to the multiple amplification and increase gradually in order to dwindle from multiple.
And, focus offset compensating device according to monitoring camera of the present invention, comprise following part: just install cutoff filter if screening-mode is a day mode at the front end of imaging apparatus, and if screening-mode is the driven tool that night mode is just installed the blank glass sheet; And when the change action is preset in execution, if screening-mode when setting relevant preset information and current screening-mode are inconsistent, with regard to according to owing to replace to the focus offset value that blank glass sheet or cutoff filter cause, the control tool that carries out variable control at the position of focal length lens.
And in the focus offset compensating device of above-mentioned monitoring camera, the screening-mode that is also storing in above-mentioned preset information when being used for the relevant preset information of display setting is the day mode or the identifying information of night mode.
And, in the focus offset compensating device of above-mentioned monitoring camera, above-mentioned focus offset value is in order to compensate owing to there are differences the focus offset that is caused between above-mentioned cutoff filter and the blank glass sheet on material and thickness, and the result of the test value that stores in advance and manage.
In addition, in the focus offset compensating device of above-mentioned monitoring camera, when the zoom action of change action is preset in execution, if current screening-mode is a night mode, above-mentioned control tool will carry out variable control at the position of focal length lens according to the focus offset value that infrared ray caused.
And, in the focus offset compensating device of above-mentioned monitoring camera, above-mentioned focus offset value be for compensation infrared ray under night mode at the focus offset that is caused when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage.
With the present invention is the focus offset compensating device and the method for the monitoring camera of foundation, can be to install cutoff filter (IR Cut Filter) at the front end of imaging apparatus during (Day) pattern daytime at the screening-mode of for example monitoring camera, and be to install blank glass sheet (Dummy Glass) night during (Night) pattern at screening-mode, according to the focus offset that difference caused (Focus Offset) value on material and thickness between above-mentioned cutoff filter and the blank glass sheet, carry out variable control then at the position of focal length lens; When carrying out the zoom action, be under the situation of night mode at current screening-mode, carry out variable control according to the focus offset value that infrared ray caused at the position of focal length lens; When presetting (Preset) change action in execution, under the screening-mode and the inconsistent situation of current shooting pattern when preset information is correlated with in setting, according to owing to change the focus offset value that blank glass sheet or cutoff filter are caused, carry out variable control at the position of focal length lens.With this come effectively that screening-mode switches to carrying out, zoom action and preset the focus offset that the change action caused and compensate, thereby under the focus condition subject is being taken more accurately.
Description of drawings
Fig. 1 and Fig. 2 are to use the structural representation of monitoring camera of the present invention.
Fig. 3 and Fig. 4 are the embodiment schematic diagrames according to replacement cutoff filter of the present invention and blank glass sheet.
Fig. 5 and Fig. 6 are the process schematic diagrames of setting the focus offset value according to of the present invention when switching screening-mode.
Fig. 7 and Fig. 8 are the process schematic diagrames of setting the focus offset value according to of the present invention when carrying out the zoom action.
Fig. 9 is according to the related embodiment schematic diagram that is storing the preset information of day/night mark of the present invention.
Figure 10 is the motion flow schematic diagram according to the focus offset compensation method of monitoring camera of the present invention.
The symbol description of major part in the accompanying drawing
10: zoom lens 11: focal length lens
12: aperture 13: cutoff filter
14: blank glass sheet 15: imaging apparatus
16: automatic gain adjusting portion 17: Digital Signal Processing portion
18: zoom motor 19: focusing motor
20: aperture motor 21: the day/night motor
22: aperture motor driving part 23: control part
24: memory 25: timer
26: zoom motor drive division 27: the focusing motor drive division
28: the day/night motor driving part
Embodiment
Below, just with reference to accompanying drawing to being that the focus offset compensating device of monitoring camera of foundation and the preferred embodiment of method are elaborated with the present invention.
The present invention is applicable to that screening-mode is divided into polytype monitoring camera of day mode and night mode.For example using on the monitoring camera of the present invention, as shown in Figure 1, comprise following part: zoom lens 10, focal length lens 11, aperture 12, cutoff filter 13, blank glass sheet 14, imaging apparatus 15, automatic gain adjusting portion (AGC) 16, Digital Signal Processing portion (DSP) 17, zoom motor 18, focusing motor 19, aperture motor 20, day/night motor 21, aperture motor driving part 22, control part 23, memory 24, timer 25, zoom motor drive division 26, focusing motor drive division 27, day/night motor driving part 28 etc.
In addition, when above-mentioned control part 23 is set at day mode to screening-mode or according to the current time that above-mentioned timer 25 calculates screening-mode is set at day mode in the requirement according to the user, control above-mentioned day/night motor driving part 28 and carry out work, install cutoff filter 13 at the front end of above-mentioned imaging apparatus 15.
And, when above-mentioned control part 23 is set at night mode to screening-mode in current time that according to user's requirement screening-mode is set at night mode or calculates according to above-mentioned timer 25 etc., as shown in Figure 2, control above-mentioned day/night motor driving part 28 and carry out work, install blank glass sheet 14 at the front end of above-mentioned imaging apparatus 15.
For example shown in Figure 3, if be set at day mode, just above-mentioned day/night motor 21 is rotated to clockwise direction, make cutoff filter 13 be installed in the front end of above-mentioned imaging apparatus 15.As shown in Figure 4,, just above-mentioned day/night motor 21 is rotated to counter clockwise direction, make blank glass sheet 14 be installed in the front end of above-mentioned imaging apparatus 15 if be set at night mode.
On the other hand, when the cutoff filter 13 that is installed in above-mentioned imaging apparatus 15 front ends is replaced to blank glass sheet 14, owing on material and thickness, there are differences between above-mentioned cutoff filter and the blank glass sheet, so focus offset has just taken place.
For example shown in Figure 5, screening-mode from day mode when night mode is switched, when the thickness of the blank glass sheet that is installed in above-mentioned imaging apparatus 15 front ends is bigger than the thickness of cutoff filter, concentrating on light beam spot (Beam Spot) on the above-mentioned imaging apparatus 15 just drops on thin (fine) focus rear and certain distance is arranged (focus offset has just taken place in place D).
On the contrary, as shown in Figure 6, screening-mode from day mode when night mode is switched, when the thickness of the blank glass sheet that is installed in above-mentioned imaging apparatus 15 front ends than the thickness of cutoff filter hour, concentrating on light beam spot (Beam Spot) on the above-mentioned imaging apparatus 15 just drops on thin (fine) focus the place ahead and certain distance is arranged (focus offset has equally also taken place in+D) place.
Therefore, the present invention is in order to compensate the focus offset that switches or take place from night mode to night mode from day mode at screening-mode when day mode is switched, carry out the result of the test value of variable adjustment being used for the focusing lens location, be set at owing to switch the focus offset that screening-mode caused (FocusOffset=[ D]) value, and it is stored in above-mentioned memory 24 such as in the middle of the electricallyerasable ROM (EEROM) nonvolatile memories such as (EEPROM).
In addition, as shown in Figure 7, under night (Night) mode state, dwindle (ZoomWide) action if carry out multiple, the beam spot of infrared ray (IR) composition by blank glass sheet 14 will drop on the place of thin (fine) focus rear certain distance (W (w)) of above-mentioned imaging apparatus 15, and focus offset takes place.
Simultaneously, under the night mode state, amplify (Zoom Tele) action if carry out multiple, the beam spot of infrared ray (IR) composition by blank glass sheet 14 will drop on the place (W (t)) more farther than above-mentioned spacing distance (W (w)), forms focus offset.
Therefore, utilize the present invention, under above-mentioned night mode state, in order to compensate the focus offset that takes place when multiple dwindles (Zoom Wide) or multiple amplification (Zoom Tele) action carrying out, be used at the result of the test value that variable adjustment is carried out in the focal length lens position be set at because the focus offset that the zoom action is caused (Focus Offset=[-W (i)], the i=Zoom multiplying power) is worth, and it is stored in the above-mentioned memory 24.For example shown in Figure 8, the focus offset value that above-mentioned zoom action causes is the value that increases gradually in the middle of the variation that narrows down to the multiple amplification from multiple.
In addition, utilize the present invention, for example shown in Figure 9, for pan/tilt/zoom (Pan/Tilt/Zoom) state that makes monitoring camera changes over any shooting state that the user needs, when presetting (Preset) information in setting, store day/night mark (D﹠amp associated therewith simultaneously; N_Flag), be the day mode or the identifying information of night mode with it as this time point screening-mode being confirmed and when preset information is correlated with in setting, being used for identifying screening-mode.
For example, the 1st preset information is being set at pan 30 degree, when 2 times of 50 degree that tilt, zoom,, just the day/night mark saved as " 0 " value if the screening-mode of this time point is a day mode.The 2nd preset information is being set at pan 45 degree, when 4 times of 50 degree that tilt, zoom,, just the day/night mark saved as " 1 " value if the screening-mode of this time point is a night mode.
Simultaneously, the preset information that above-mentioned storage and management are got up is retrieved reference, carry out at pan/tilt/zoom action carry out variable control preset the change action time, if screening-mode when setting relevant preset information and current screening-mode are inconsistent, just judge focus offset has taken place, carry out the focus offset that caused by screening-mode change action and zoom action (Focus Offset=[ D]+[W (i)]) compensating movement then.
Figure 10 shows is to be the action flow chart of focus offset compensation method of the monitoring camera of foundation with the present invention.In carrying out the process of taking action (S10), S11 when switching screening-mode according to user's requirement or according to the factors such as current time that above-mentioned timer 25 calculates, above-mentioned control part 23 is just controlled day/night motor driving part 28 and is carried out work, installs cutoff filter 13 or blank glass sheet 14 at the front end of above-mentioned imaging apparatus 15.
For example shown in Figure 4, if screening-mode is switched to night mode from day mode, above-mentioned control part 23 is just controlled day/night motor driving part 28 and is carried out work, and above-mentioned day/night motor 21 to rotation counterclockwise, is installed in blank glass sheet 14 front end of above-mentioned imaging apparatus 15.
And, with reference to Fig. 5 and shown in Figure 6, in order to compensate owing on material and thickness, there are differences the focus offset that is caused between cutoff filter 13 and the blank glass sheet 14, those are used as that the result of the test value stores to above-mentioned control part 23 and the focus offset value that by screening-mode change action caused of management in above-mentioned memory 24 (for example: Offset=[ D]) retrieved and confirm after, control above-mentioned focusing motor drive division 27 and carry out work, rotation focusing motor 19.
Like this, owing to carried out a series of focus offset compensating movements (S12) that carry out variable control at above-mentioned focal length lens 11 positions, thereby can the focus offset that the screening-mode change action is caused effectively be compensated.
In addition, in carrying out the process of taking action, when carrying out the zoom action (S13), above-mentioned control part 23 is just confirmed current screening-mode.For example, if current screening-mode is to use the night mode state (S14) of above-mentioned blank glass sheet 14, just with reference to Fig. 7 and shown in Figure 8, in the middle of memory 24, the focus offset value that the zoom action that increases gradually narrow down to the multiple amplification from multiple is caused (for example: Offset=[-W (i)], the i=Zoom multiplying power) retrieves and confirm, control focusing motor drive division 27 then and carry out work, rotation focusing motor 19.
Owing to carried out a series of focus offset compensating movements that carry out variable control at above-mentioned focal length lens 11 positions, thereby can be at the night mode state down owing to the focus offset that the zoom action is caused effectively compensates.
And, in the process of carrying out above-mentioned shooting action, when the change action is preset in execution (S16), the day/night mark (D﹠amp that is associated with relevant preset information that 23 pairs of above-mentioned control parts are stored; N_Flag) confirm that the screening-mode when confirm setting above-mentioned preset information is day mode or night mode.
Simultaneously, whether the pattern of more above-mentioned affirmation consistent with current screening-mode (S17), for example, screening-mode when setting above-mentioned preset information is that day mode and current screening-mode are when being night mode, above-mentioned control part 23, with reference to Fig. 5 and shown in Figure 6, just to be used as in the above-mentioned memory 24 that the result of the test value stores and management is got up because the focus offset value that the screening-mode change action is caused (for example: Offset=[ D]) retrieve and confirm, control above-mentioned focusing motor drive division 27 then and carry out work, rotate above-mentioned focusing motor 19.
In addition, when the above-mentioned zoom that presets the change action of execution moves, above-mentioned control part 23, with reference to shown in Figure 8, in memory 24, amplify the focus offset value that the zoom action that increases gradually caused (for example: Offset=[-W (i)], i=Zoom multiplying power) and retrieve and confirm at narrow down to multiple from multiple, control above-mentioned focusing motor drive division 27 then and carry out work, rotate above-mentioned focusing motor 19.
Like this, owing to carried out a series of focus offset compensating movements that carry out variable control at above-mentioned focal length lens 11 positions, thereby can preset the focus offset that when action change take place in execution and effectively compensate, and then can take subject under the focus condition more accurately.
As a reference, in the present invention, can select to carry out retrieval and confirm above-mentioned focus offset value and then the compensation focus offset according to user's requirement, or carry out a series of actions that focusing action automatically compensates focus offset more temporarily.
The aforesaid preferred embodiment of the present invention puts forward for the illustration purpose, in related work personnel the claim item is put down in writing fully below the technology of the present invention thought and technical scope thereof, other various embodiment are improved, change, substitute or additional etc.
Claims (22)
1. the focus offset compensation method of a monitoring camera is characterized in that: comprise following step:
If the screening-mode of monitoring camera switches to night mode from day mode, just the cutoff filter that is installed in the imaging apparatus front end is replaced to the step of blank glass sheet;
According to the focus offset value that causes owing to the above-mentioned blank glass sheet of replacement, the step of carrying out variable control at the position of focal length lens.
2. the focus offset compensation method of monitoring camera as claimed in claim 1 is characterized in that: also comprise following step:
If the screening-mode of above-mentioned monitoring camera switches to day mode from night mode, just the blank glass sheet that is installed in the imaging apparatus front end is replaced to the step of cutoff filter;
According to the focus offset value that causes owing to the above-mentioned cutoff filter of replacement, the step of carrying out variable control at the position of focal length lens.
3. the focus offset compensation method of monitoring camera as claimed in claim 1, it is characterized in that: above-mentioned focus offset value is in order to compensate owing to there are differences the focus offset that is caused between above-mentioned cutoff filter and the blank glass sheet on material and thickness, and the result of the test value that stores in advance and manage.
4. the focus offset compensation method of a monitoring camera is characterized in that: comprise following step:
When the zoom action of carrying out monitoring camera, whether be the step that night mode is judged to current screening-mode;
If above-mentioned judged result is a night mode,, carry out the step of variable control at the position of focal length lens just according to the focus offset value that infrared ray caused.
5. the focus offset compensation method of monitoring camera as claimed in claim 4, it is characterized in that: above-mentioned focus offset value be for compensation infrared ray under night mode at the focus offset that causes when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage.
6. the focus offset compensation method of monitoring camera as claimed in claim 5 is characterized in that: above-mentioned focus offset value is to amplify the value that changes and increase gradually in order to dwindle from multiple to multiple.
7. the focus offset compensation method of a monitoring camera is characterized in that: comprise following step:
When monitoring camera presets the change action in execution, the step that the screening-mode when being correlated with preset information at setting is confirmed;
If screening-mode after the above-mentioned affirmation and current screening-mode are inconsistent, just according to replacing the focus offset value that blank glass sheet or cutoff filter are caused, the step of carrying out variable control at the position of focal length lens.
8. the focus offset compensation method of monitoring camera as claimed in claim 7 is characterized in that: in the middle of above-mentioned preset information, the screening-mode that is also storing when being used for the relevant preset information of display setting is the day mode or the identifying information of night mode.
9. the focus offset compensation method of monitoring camera as claimed in claim 7, it is characterized in that: above-mentioned focus offset value is in order to compensate owing to there are differences the focus offset that is caused between above-mentioned cutoff filter and the blank glass sheet on material and thickness, and the result of the test value that stores in advance and manage.
10. the focus offset compensation method of monitoring camera as claimed in claim 7, it is characterized in that: further comprising the steps of: when the above-mentioned zoom that presets the change action of execution moves, if current screening-mode is a night mode, just, carry out the step of variable control at the position of focal length lens according to the focus offset value that infrared ray caused.
11. the focus offset compensation method of monitoring camera as claimed in claim 10, it is characterized in that: above-mentioned focus offset value is in order to compensate the focus offset that under night mode infrared ray is caused when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage.
12. the focus offset compensating device of a monitoring camera is characterized in that: comprise following part:
If being day mode, screening-mode just installs cutoff filter, if night mode is just installed the driven tool of blank glass sheet at the front end of imaging apparatus;
According to the focus offset value that is caused owing to installation blank glass sheet, the control tool that carries out variable control at the position of focal length lens.
13. the focus offset compensating device of monitoring camera as claimed in claim 12 is characterized in that: above-mentioned control tool carries out variable control according to because the focus offset value that cutoff filter caused is installed at the position of focal length lens.
14. the focus offset compensating device of monitoring camera as claimed in claim 12, it is characterized in that: above-mentioned focus offset value is in order to compensate owing to there are differences the focus offset that is caused between above-mentioned cutoff filter and the blank glass sheet on material and thickness, and the result of the test value that stores in advance and manage.
15. the focus offset compensating device of a monitoring camera is characterized in that: comprise following part:
If being day mode, screening-mode just installs cutoff filter, if night mode is just installed the driven tool of blank glass sheet at the front end of imaging apparatus;
When carrying out the zoom action,,, carry out the control tool of variable control at the position of focal length lens just according to the focus offset value that infrared ray caused if current screening-mode is a night mode.
16. the focus offset compensating device of monitoring camera as claimed in claim 15, it is characterized in that: above-mentioned focus offset value is in order to compensate the focus offset that under night mode infrared ray is caused when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage.
17. the focus offset compensating device of monitoring camera as claimed in claim 16 is characterized in that: above-mentioned focus offset value is the value that to become the multiple amplification and increase gradually in order to dwindle from multiple.
18. the focus offset compensating device of a monitoring camera is characterized in that: comprise following part:
If being day mode, screening-mode just installs cutoff filter, if night mode is just installed the driven tool of blank glass sheet at the front end of imaging apparatus;
When the change action is preset in execution, if screening-mode when setting relevant preset information and current screening-mode are inconsistent, with regard to according to owing to replace the focus offset value that blank glass sheet or cutoff filter cause, the control tool that carries out variable control at the position of focal length lens.
19. the focus offset compensating device of monitoring camera as claimed in claim 18, it is characterized in that: in the middle of above-mentioned preset information, the screening-mode that is also storing when being used for the relevant preset information of display setting is the day mode or the identifying information of night mode.
20. the focus offset compensating device of monitoring camera as claimed in claim 18, it is characterized in that: above-mentioned focus offset value is in order to compensate owing to there are differences the focus offset that is caused between above-mentioned cutoff filter and the blank glass sheet on material and thickness, and the result of the test value that stores in advance and manage.
21. the focus offset compensating device of monitoring camera as claimed in claim 18, it is characterized in that: above-mentioned control tool, when the zoom action of change action is preset in execution, if current screening-mode is a night mode, just, carry out variable control at the position of focal length lens according to the focus offset value that infrared ray caused.
22. the focus offset compensating device of monitoring camera as claimed in claim 21, it is characterized in that: above-mentioned focus offset value is in order to compensate the focus offset that under night mode infrared ray is caused when being installed in the blank glass sheet of imaging apparatus front end, and the result of the test value that stores in advance and manage.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102111558A (en) * | 2011-02-15 | 2011-06-29 | 杭州海康威视数字技术股份有限公司 | Method and device for automatically switching over optical filter of video camera |
| CN102223481A (en) * | 2011-06-14 | 2011-10-19 | 广州中朗润业数码科技有限公司 | Linear synchronic double-automatic-focusing camera and linear synchronic double-automatic-focusing method |
| CN102269855A (en) * | 2011-01-17 | 2011-12-07 | 深圳市保千里电子有限公司 | Infrared induction switch zooming lens and imaging and monitoring method thereof |
| CN104635403A (en) * | 2011-08-09 | 2015-05-20 | 精工爱普生株式会社 | Image pickup device and projector |
| CN108234861A (en) * | 2016-12-22 | 2018-06-29 | 安讯士有限公司 | Monitor the focusing of the camera of scene |
| CN109831619A (en) * | 2018-12-24 | 2019-05-31 | 天津天地伟业信息系统集成有限公司 | A method of it is focused automatically after switching optical filter under camera motion state |
-
2009
- 2009-04-27 CN CN200910050086A patent/CN101873425A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269855A (en) * | 2011-01-17 | 2011-12-07 | 深圳市保千里电子有限公司 | Infrared induction switch zooming lens and imaging and monitoring method thereof |
| CN102111558A (en) * | 2011-02-15 | 2011-06-29 | 杭州海康威视数字技术股份有限公司 | Method and device for automatically switching over optical filter of video camera |
| CN102111558B (en) * | 2011-02-15 | 2013-07-17 | 杭州海康威视数字技术股份有限公司 | Method and device for automatically switching over optical filter of video camera |
| CN102223481A (en) * | 2011-06-14 | 2011-10-19 | 广州中朗润业数码科技有限公司 | Linear synchronic double-automatic-focusing camera and linear synchronic double-automatic-focusing method |
| CN104635403A (en) * | 2011-08-09 | 2015-05-20 | 精工爱普生株式会社 | Image pickup device and projector |
| US9733552B2 (en) | 2011-08-09 | 2017-08-15 | Seiko Epson Corporation | Image pickup device and projector |
| CN108234861A (en) * | 2016-12-22 | 2018-06-29 | 安讯士有限公司 | Monitor the focusing of the camera of scene |
| CN108234861B (en) * | 2016-12-22 | 2019-06-14 | 安讯士有限公司 | Camera for monitoring scene and its focusing method |
| CN109831619A (en) * | 2018-12-24 | 2019-05-31 | 天津天地伟业信息系统集成有限公司 | A method of it is focused automatically after switching optical filter under camera motion state |
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