CN104980717A - Image processing device, video photographing lens, video camera body and video camera equipment - Google Patents
Image processing device, video photographing lens, video camera body and video camera equipment Download PDFInfo
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- CN104980717A CN104980717A CN201410132030.8A CN201410132030A CN104980717A CN 104980717 A CN104980717 A CN 104980717A CN 201410132030 A CN201410132030 A CN 201410132030A CN 104980717 A CN104980717 A CN 104980717A
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Abstract
The invention discloses an image processing device, a video photographing lens, a video camera body and video camera equipment. The image processing device comprises a first chrominance signal filter and a bandpass filter. An image signal is successively transmitted to the first chrominance signal filter and the bandpass filter. The first chrominance signal filter is used for filtering the chrominance signal in the image signal. The bandpass filter outputs the image signal in which the chrominance signal is filtered, thereby realizing automatic focusing. Through the manner provided by the invention, the image processing device can quickly and accurately realize automatic focusing.
Description
Technical field
The present invention relates to camera technique field, particularly relate to a kind of image processing apparatus and pick-up lens, shooting fuselage, picture pick-up device.
Background technology
Automatic focus utilizes electronic technology and electric machines control technology whether to replace the focus of human eye detection target subject body, and replace manual adjustment focus to make target subject body blur-free imaging on the image sensor.Automatic focus comprises digital focus and analog focus.
In traditional analog focus method, first make focus motor whole process walk one time, constantly to obtain image, by processing the voltage obtaining response diagram image sharpness to image, image is more clear, and the voltage obtained is larger.Carry out correlation computations to obtain definition maximum according to obtained voltage, thus drive focus motor motion according to obtained definition maximum, to control the position of camera motion to the most articulation point of image, realize the automatic focus of image thus.
Wherein, image is being processed in the process of the voltage obtaining response diagram image sharpness, normally picture signal is passed through a band pass filter to obtain the luminance signal in picture signal, and then obtain the voltage of response diagram image sharpness according to this luminance signal.But, in aforesaid way, band pass filter usually cannot well by the carrier chrominance signal filtering in picture signal, especially monochromatic carrier chrominance signal, if the frequency of the carrier chrominance signal of monochrome is not in the central frequency range of band pass filter, it cannot by band pass filter filtering, thus make in the picture signal by obtaining after band pass filter except luminance signal, also has residual carrier chrominance signal.Thus, by the impact of residual carrier chrominance signal, as shown in Figure 1, the waveform of the voltage of the response diagram image sharpness obtained can become not precipitous, namely multiple peak value a, b, c may be there is in voltage waveform, thus focus motor needs can determine that b point is overall peak after covering point corresponding to a, b, c tri-peak values, even to need between three peak values back and forth relatively after can confirm that b point is overall peak, namely image point the most clearly, can reduce self-focusing speed thus.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of image processing apparatus and pick-up lens, shooting fuselage, picture pick-up device, can realize automatic focus rapidly and accurately.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of image processing apparatus, for processing picture signal, comprise band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in lens drive system, to realize automatic focus.
Wherein, also comprise amplifying circuit, picture signal is successively by described first chrominance signal filter, described amplifying circuit and described band pass filter, described amplifying circuit is for removing the synchronizing signal in picture signal, and the picture signal of carrier chrominance signal described in filtering and synchronizing signal exports in described lens drive system by described band pass filter.
Wherein, described first chrominance signal filter comprises the first resistance, the second resistance, the 3rd resistance, ceramic trapper and the first inductance, and wherein said ceramic trapper comprises input, output and common port, one end of described first resistance is used for received image signal as the input of described first chrominance signal filter, the other end ground connection of described first resistance, one end of described second resistance connects one end of described first resistance, the other end of described second resistance connects one end of described first inductance, the other end of described first inductance connects the output of described ceramic trapper, the input of described ceramic trapper connects the other end of described second resistance, the common end grounding of described ceramic trapper, one end of described 3rd resistance connects the output of described ceramic trapper, the other end ground connection of described 3rd resistance, the output of described ceramic trapper connects the input of described amplifying circuit as the output of described first chrominance signal filter.
Wherein, described band pass filter comprises the first electric capacity, the second electric capacity and the second inductance, one end of described first electric capacity connects the output of described amplifying circuit as the input of described band pass filter, the other end of described first electric capacity connects one end of described second inductance, the other end ground connection of described second inductance, one end of described second electric capacity connects one end of described second inductance, the other end of described second electric capacity as the output of described band pass filter for connecting described lens drive system.
Wherein, also comprise the second chrominance signal filter, described second chrominance signal filter is arranged between described amplifying circuit and described band pass filter, and picture signal is successively by described first chrominance signal filter, described amplifying circuit, described second chrominance signal filter and described band pass filter.
Wherein, also comprise rectification circuit and integrating circuit, picture signal is successively by described first chrominance signal filter, described amplifying circuit, described second chrominance signal filter, described band pass filter, described rectification circuit and described integrating circuit.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of self-focusing pick-up lens, be connected with lens drive system, comprise interconnective lens assembly and image processing apparatus, described lens assembly is for obtaining picture signal, described image processing apparatus is used for processing described picture signal, wherein, described image processing apparatus comprises band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in lens drive system, to realize automatic focus.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of self-focusing shooting fuselage, comprise image processing apparatus and lens drive system, described lens drive system is connected with the pick-up lens obtaining picture signal, and described image processing apparatus is used for processing described picture signal; Described image processing apparatus comprises band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in described lens drive system, described lens drive system drives described pick-up lens to move, to realize automatic focus according to the picture signal of described filtering carrier chrominance signal.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of self-focusing picture pick-up device, comprise interconnective shooting fuselage and pick-up lens, described shooting fuselage comprises image processing apparatus and lens drive system, described lens drive system is connected with described pick-up lens, and described image processing apparatus is used for processing the picture signal that described pick-up lens obtains; Described image processing apparatus comprises band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in described lens drive system, described lens drive system drives described pick-up lens to move, to realize automatic focus according to the picture signal of described filtering carrier chrominance signal.
Wherein, described image processing apparatus also comprises amplifying circuit, picture signal is successively by described first chrominance signal filter, described amplifying circuit and described band pass filter, described amplifying circuit is for removing the synchronizing signal in picture signal, and the picture signal of carrier chrominance signal described in filtering and synchronizing signal exports in described lens drive system by described band pass filter.
The invention has the beneficial effects as follows: the situation being different from prior art, in image processing apparatus of the present invention, comprise the first chrominance signal filter and band pass filter, picture signal is successively by the first chrominance signal filter and band pass filter, first chrominance signal filter is in order to remove the carrier chrominance signal in picture signal, carrier chrominance signal can be avoided thus on the impact of the voltage of follow-up acquisition response diagram image sharpness, can make lens drive system can quick obtaining maximum voltage value to realize automatic focus, self-focusing speed can be improved.
Accompanying drawing explanation
Fig. 1 is the voltage oscillogram of the response diagram image sharpness that a kind of autofocus of prior art obtains;
Fig. 2 is the structural representation of image processing apparatus one execution mode of the present invention;
Fig. 3 is the voltage oscillogram of the response diagram image sharpness obtained by image processing apparatus of the present invention;
Fig. 4 is the structural representation of another execution mode of image processing apparatus of the present invention;
Fig. 5 is in the image processing apparatus of Fig. 4, the specific implementation circuit diagram of the first chrominance signal filter;
Fig. 6 is in the image processing apparatus of Fig. 4, the specific implementation circuit diagram of amplifying circuit;
Fig. 7 is in the image processing apparatus of Fig. 4, the specific implementation circuit diagram of band pass filter;
Fig. 8 is the structural representation of the another execution mode of image processing apparatus of the present invention;
Fig. 9 is in the image processing apparatus of Fig. 8, the specific implementation circuit diagram of rectification circuit;
Figure 10 is in the image processing apparatus of Fig. 8, the specific implementation circuit diagram of integrating circuit;
Figure 11 is the structural representation of the another execution mode of image processing apparatus of the present invention;
Figure 12 is the structural representation of the first execution mode of the self-focusing camera lens of the present invention;
Figure 13 is the structural representation of the present invention's self-focusing shooting fuselage one execution mode;
Figure 14 is the structural representation of the present invention's self-focusing picture pick-up device one execution mode.
Embodiment
Below in conjunction with drawings and embodiments, the present invention is described in detail.
Picture pick-up device is when realizing automatic focus, usually pick-up lens whole process is made to walk one time to carry out the collection of image, then collected image is processed to the luminance signal extracted in picture signal, and then the voltage of response diagram image sharpness is obtained according to luminance signal, be specially the voltage obtaining response diagram image sharpness according to the high fdrequency component in luminance signal.Image is more clear, and magnitude of voltage is larger.Namely self-focusing process is find the maximum process of magnitude of voltage, to obtain the most articulation point of image, thus drives pick-up lens to move to the position of the most articulation point of this image, to realize automatic focus.
Consult Fig. 2, in an execution mode of image processing apparatus of the present invention, described image processing apparatus is used for processing picture signal, and to make picture pick-up device realize automatic focus, it comprises band pass filter 202 and the first chrominance signal filter 201.
First chrominance signal filter 201 comprises input, output and ground.The input of the first chrominance signal filter 201 is used for received image signal, the input of the output connecting band bandpass filter of the first chrominance signal filter 201, the earth terminal of the first chrominance signal filter 201 connects ground, the output connection lens drive system of band pass filter 202.When processing picture signal, picture signal is successively by the first chrominance signal filter 201 and band pass filter 202.Wherein, the first chrominance signal filter 201 is for the carrier chrominance signal in filtering picture signal, and picture signal is when by the first chrominance signal filter 201, and the carrier chrominance signal in picture signal is transferred into the earth, to be filtered out by earth terminal.First chrominance signal filter 201 can be a band pass filter.The centre frequency of carrier chrominance signal is about 4.43MHz, and therefore the first chrominance signal filter 201 is preferably the band pass filter that centre frequency is 4.5MHz, with by carrier chrominance signal filtering.Certainly, the centre frequency of the first chrominance signal filter 201 can also be 4.3MHz, 4.6MHz or other numerical value, as long as make the centre frequency of carrier chrominance signal in the centre frequency environs of the first chrominance signal filter 401, enter into band pass filter 202 to stop carrier chrominance signal by the first chrominance signal filter 401.
The picture signal of filtering carrier chrominance signal exports in band pass filter 202.Picture signal generally comprises carrier chrominance signal and luminance signal, and therefore, after the process through the first chrominance signal filter 201, the signal entered in band pass filter 202 is the luminance signal in picture signal.The parameter of band pass filter 202 is mainly arranged according to the high fdrequency component of luminance signal, it is for removing the low frequency components in luminance signal, and the high fdrequency component in output brightness signal gives the lens drive system 203 for driving camera motion, thus lens drive system 203 can obtain the magnitude of voltage of response diagram image sharpness according to the high fdrequency component in luminance signal.Wherein, all magnitudes of voltage that lens drive system 203 obtains have reacted pick-up lens walks the image obtained in the process of time definition in whole process respectively.Thus, lens drive system 203 can carry out correlation computations to obtain maximum voltage value to obtained all magnitudes of voltage, and then obtains the most articulation point of image, thus drives pick-up lens to move to the most articulation point of image, to realize automatic focus.
Compared to prior art by picture signal directly by band pass filter to obtain the way of luminance signal, in present embodiment, by increasing by the first chrominance signal filter 201 in order to by the carrier chrominance signal filtering in picture signal, therefore the magnitude of voltage obtained at follow-up lens drive system 203 is all obtain according to luminance signal, as shown in Figure 3, owing to there is no the interference of carrier chrominance signal, the voltage waveform of obtained response diagram image sharpness is made to become precipitous and multiple crest can not be there is, therefore in the process finding voltage max, the point of voltage max can be found rapidly, and do not need to compare back and forth between multiple crest value, fast and accurately can obtain the most articulation point of image thus, thus realize automatic focus rapidly, improve self-focusing efficiency and accuracy.
In the present invention one preferred implementation, consult Fig. 4, image processing apparatus also comprises the amplifying circuit 204 for removing the synchronizing signal in picture signal.Amplifying circuit 204 is arranged between the first chrominance signal filter 201 and band pass filter 202, and namely picture signal is successively by the first chrominance signal filter 201, amplifying circuit 204 and band pass filter 202.After the effect of the first chrominance signal filter 201, the signal entered in amplifying circuit 204 is the luminance signal of band synchronizing signal.Amplifying circuit 204 is mainly used for removing row, field, burst signal, simultaneously the load-carrying ability of intensifier circuit.Therefore, picture signal is after the first chrominance signal filter 201 and amplifying circuit 204, and carrier chrominance signal and synchronizing signal are all by filtering, and remaining luminance signal enters in band pass filter 202.
Further, consult Fig. 5, Fig. 5 is the specific implementation circuit diagram of the first chrominance signal filter 201, and picture signal, from the input of Vi1 port, exports from Vo1 port.In present embodiment, the first chrominance signal filter 201 is a ceramic filter, comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, ceramic trapper T1 and the first inductance L 1.One end of first resistance R1 is used for received image signal, the other end ground connection of the first resistance R1 as the input of the first chrominance signal filter 201.One end of second resistance R2 connects one end of the first resistance R1, and the other end of the second resistance R2 connects one end of the first inductance L 1, and the other end of the first inductance L 1 connects the output of ceramic trapper T1.The input of ceramic trapper T1 connects the other end of the second resistance R2, the common segment ground connection of ceramic trapper T1.One end of 3rd resistance R3 connects the output of ceramic trapper T1, the other end ground connection of the 3rd resistance R3.The output of ceramic trapper T1 connects the input of amplifying circuit 204 as the output of the first chrominance signal filter 201.The specific implementation circuit diagram of the amplifying circuit 402 of present embodiment as shown in Figure 6, input to amplifying circuit 204 from the luminance signal of the band synchronizing signal of the first chrominance signal filter 201 output from Vi2 port, the luminance signal being subtracted synchronizing signal after the effect of amplifying circuit 204 exports from Vo2 port.
Consult Fig. 7, Fig. 7 is the specific implementation circuit diagram of band pass filter 202, and the luminance signal being subtracted synchronizing signal inputs in band pass filter 202 from Vi3 port, and exports from Vo3 port.The band pass filter 202 of present embodiment comprises the first electric capacity C1, the second electric capacity C2 and the second inductance L 2.One end of first electric capacity C1 connects the output of amplifying circuit 204 as the input of band pass filter 202, and the other end of the first electric capacity C2 connects one end of the second inductance L 2, the other end ground connection of the second inductance L 2.One end of second electric capacity C2 connects one end of the second inductance L 2, and the other end of the second electric capacity C2 is used for connection lens drive system 203 as the output of band pass filter 202.
The luminance signal deducting synchronizing signal exported from amplifying circuit 204 is the luminance signal that low-and high-frequency mixes, and is then must with the magnitude of voltage of response diagram image sharpness according to the high fdrequency component in luminance signal in automatic focus process.Therefore, band pass filter 202 is mainly used in except the low frequency components in luminance free signal.Deduct the luminance signal of synchronizing signal after band pass filter 202, low frequency components, by filtering, exports the luminance signal only with high fdrequency component.
Certainly, in other implementations, first chrominance signal filter 201 can also be arranged between amplifying circuit 204 and band pass filter 202, namely figure phase signals is successively by amplifying circuit 204, first chrominance signal filter 201 and band pass filter 202, and exports lens drive system 203 to by band pass filter 202.In addition, the first chrominance signal filter 201 also can also be other filter, such as band stop filter etc., every can by carrier chrominance signal removing and can by the filter of luminance signal.
In another preferred implementation of the present invention, in order to make the voltage waveform of obtained response diagram image sharpness more smoothly precipitous, with can more quick obtaining voltage max, consult Fig. 8, image processing apparatus of the present invention also comprises rectification circuit 205 and integrating circuit 206.The luminance signal of the high fdrequency component that band pass filter 202 exports exports in lens drive system 203 successively after rectification circuit 205 and integrating circuit 206.Wherein, rectification circuit 205 is voltage doubling rectifing circuit, and as shown in Figure 9, the luminance signal exported from band pass filter 202 inputs to rectification circuit 205 from Vi4 port its realizing circuit, and exports from Vo4 port.Luminance signal is by after the filtering of band pass filter 202, the level obtained is lower, therefore by a voltage doubling rectifing circuit 205, this level is boosted, to obtain the higher signal of level, then by an integrating circuit 205 to make the signal that exports more smoothly anxious, thus obtain precipitous level and smooth voltage waveform.As shown in Figure 10, signal from the input of Vi5 port, and exports from Vo5 port the specific implementation circuit of integrating circuit 205.
Consult Figure 11, in the another preferred implementation of the present invention, in order to ensure that carrier chrominance signal is by filtering, image processing apparatus also comprises the second chrominance signal filter 207, second chrominance signal filter 207 is arranged between amplifying circuit 204 and band pass filter 202, and picture signal is successively by the first chrominance signal filter 201, amplifying circuit 204, second chrominance signal filter 207 and band pass filter 202.Second chrominance signal filter 403 in order to the carrier chrominance signal of filtering in amplifying circuit 204 signal out, to ensure that carrier chrominance signal is by filtering.
Consult Figure 12, in an execution mode of the self-focusing pick-up lens of the present invention, pick-up lens is connected with lens drive system, comprises interconnective lens assembly 121 and image processing apparatus 122.Wherein, lens assembly 121 is for obtaining picture signal, image processing apparatus 122 is the image processing apparatus in above-mentioned arbitrary execution mode, it processes for the picture signal obtained lens assembly 121, to remove the carrier chrominance signal in picture signal, and the signal after process is exported to lens drive system 123, thus make lens drive system 123 move to the position of the most articulation point of image according to obtained luminance signal fast driving pick-up lens, to realize automatic focus, and self-focusing speed can be improved.
Consult Figure 13, in an execution mode of the self-focusing shooting fuselage of the present invention, shooting fuselage comprises image processing apparatus 131 and lens drive system 132.Lens drive system 132 is connected with the pick-up lens 133 obtaining picture signal.Wherein, image processing apparatus 131 is the image processing apparatus in above-mentioned arbitrary execution mode, image for obtaining pick-up lens 133 processes, to remove the carrier chrominance signal in picture signal, and the signal after process is exported to lens drive system 132, thus make lens drive system 132 move to the position of the most articulation point of image according to obtained luminance signal fast driving pick-up lens 133, to realize automatic focus, and self-focusing speed can be improved.
Consult Figure 14, in one execution mode of the self-focusing picture pick-up device of the present invention, picture pick-up device comprises interconnective pick-up lens 141 and shooting fuselage 142, wherein, shooting fuselage 142 comprises image processing apparatus 1421 and lens drive system 1422, lens drive system 1422 is connected with pick-up lens 141, image processing apparatus 1421 is the image processing apparatus in above-mentioned arbitrary execution mode, picture signal for obtaining pick-up lens 141 processes, to remove the carrier chrominance signal in picture signal, and the signal after process is exported to lens drive system 1422, thus make lens drive system 1422 move to the position of the most articulation point of image according to obtained luminance signal fast driving pick-up lens 141, to realize automatic focus, and self-focusing speed can be improved.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. an image processing apparatus, for processing picture signal, it is characterized in that, comprise band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, and described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in lens drive system, to realize automatic focus.
2. device according to claim 1, is characterized in that,
Also comprise amplifying circuit, picture signal is successively by described first chrominance signal filter, described amplifying circuit and described band pass filter, described amplifying circuit is for removing the synchronizing signal in picture signal, and the picture signal of carrier chrominance signal described in filtering and synchronizing signal exports in described lens drive system by described band pass filter.
3. device according to claim 2, is characterized in that,
Described first chrominance signal filter comprises the first resistance, the second resistance, the 3rd resistance, ceramic trapper and the first inductance, and wherein said ceramic trapper comprises input, output and common port;
One end of described first resistance is used for received image signal as the input of described first chrominance signal filter, the other end ground connection of described first resistance, one end of described second resistance connects one end of described first resistance, the other end of described second resistance connects one end of described first inductance, the other end of described first inductance connects the output of described ceramic trapper, the input of described ceramic trapper connects the other end of described second resistance, the common end grounding of described ceramic trapper, one end of described 3rd resistance connects the output of described ceramic trapper, the other end ground connection of described 3rd resistance, the output of described ceramic trapper connects the input of described amplifying circuit as the output of described first chrominance signal filter.
4. device according to claim 3, is characterized in that,
Described band pass filter comprises the first electric capacity, the second electric capacity and the second inductance, one end of described first electric capacity connects the output of described amplifying circuit as the input of described band pass filter, the other end of described first electric capacity connects one end of described second inductance, the other end ground connection of described second inductance, one end of described second electric capacity connects one end of described second inductance, the other end of described second electric capacity as the output of described band pass filter for connecting described lens drive system.
5. device according to claim 2, is characterized in that,
Also comprise the second chrominance signal filter, described second chrominance signal filter is arranged between described amplifying circuit and described band pass filter, and picture signal is successively by described first chrominance signal filter, described amplifying circuit, described second chrominance signal filter and described band pass filter.
6. device according to claim 2, is characterized in that,
Also comprise rectification circuit and integrating circuit, picture signal is successively by described first chrominance signal filter, described amplifying circuit, described second chrominance signal filter, described band pass filter, described rectification circuit and described integrating circuit.
7. a self-focusing pick-up lens, be connected with lens drive system, it is characterized in that, comprise interconnective lens assembly and image processing apparatus, described lens assembly is for obtaining picture signal, described image processing apparatus is used for processing described picture signal, wherein, described image processing apparatus comprises band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in lens drive system, to realize automatic focus.
8. a self-focusing shooting fuselage, is characterized in that, comprises image processing apparatus and lens drive system, and described lens drive system is connected with the pick-up lens obtaining picture signal, and described image processing apparatus is used for processing described picture signal;
Described image processing apparatus comprises band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in described lens drive system, described lens drive system drives described pick-up lens to move, to realize automatic focus according to the picture signal of described filtering carrier chrominance signal.
9. a self-focusing picture pick-up device, it is characterized in that, comprise interconnective shooting fuselage and pick-up lens, described shooting fuselage comprises image processing apparatus and lens drive system, described lens drive system is connected with described pick-up lens, and described image processing apparatus is used for processing the picture signal that described pick-up lens obtains;
Described image processing apparatus comprises band pass filter and the first chrominance signal filter, described picture signal is successively by described first chrominance signal filter and described band pass filter, described first chrominance signal filter is used for the carrier chrominance signal in picture signal described in filtering, described band pass filter is used for the picture signal of carrier chrominance signal described in filtering to export in described lens drive system, described lens drive system drives described pick-up lens to move, to realize automatic focus according to the picture signal of described filtering carrier chrominance signal.
10. equipment according to claim 9, is characterized in that,
Described image processing apparatus also comprises amplifying circuit, picture signal is successively by described first chrominance signal filter, described amplifying circuit and described band pass filter, described amplifying circuit is for removing the synchronizing signal in picture signal, and the picture signal of carrier chrominance signal described in filtering and synchronizing signal exports in described lens drive system by described band pass filter.
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| WO2017097009A1 (en) * | 2015-12-10 | 2017-06-15 | 浙江宇视科技有限公司 | Automatic focusing |
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| CN103487927A (en) * | 2013-10-16 | 2014-01-01 | 北京航空航天大学 | Automatic focusing method of microscope |
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| CN1199869A (en) * | 1997-02-25 | 1998-11-25 | 三洋电机株式会社 | Automatic-focusing camera |
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