WO2017107842A1 - Procédé et dispositif d'étalonnage de courbe de suivi de grossissement - Google Patents

Procédé et dispositif d'étalonnage de courbe de suivi de grossissement Download PDF

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Publication number
WO2017107842A1
WO2017107842A1 PCT/CN2016/110133 CN2016110133W WO2017107842A1 WO 2017107842 A1 WO2017107842 A1 WO 2017107842A1 CN 2016110133 W CN2016110133 W CN 2016110133W WO 2017107842 A1 WO2017107842 A1 WO 2017107842A1
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Prior art keywords
zoom
value
tracking curve
zoom tracking
focus
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PCT/CN2016/110133
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English (en)
Chinese (zh)
Inventor
林铁楠
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北京奇虎科技有限公司
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Publication of WO2017107842A1 publication Critical patent/WO2017107842A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems

Definitions

  • the present invention relates to the field of camera monitoring technology, and in particular, to a method and apparatus for correcting a zoom tracking curve.
  • the existing integrated camera has the functions of zooming and auto focusing, and has a compact structure, convenient use and wide monitoring range, and has been widely used in the field of video surveillance.
  • the zoom lens and the focus lens are separately moved and driven by the zoom motor and the focus motor respectively.
  • zoom tracking is required to make the focus lens change synchronously according to the position of the zoom lens, thereby making the image Ability to focus clearly.
  • the lens manufacturer will provide a fixed ideal zoom tracking curve corresponding to the lens, which is convenient for the camera to achieve zoom tracking and auto focus according to the zoom tracking curve.
  • the fixed ideal zoom tracking curve is used.
  • the image may have varying degrees of blur. Therefore, before or during the lens zoom tracking process, if the actual zoom tracking curve of each lens itself can be synchronized, the image of the entire zoom process can be focused clearly. So how to get the actual zoom tracking curve of each lens is a technical problem that needs to be solved.
  • An object of the present invention is to solve at least the above problems, and to provide a method for correcting a zoom tracking curve and an apparatus using the same.
  • the embodiment of the present invention adopts the following technical solutions:
  • Embodiments of the present invention provide a method for correcting a zoom tracking curve, which includes:
  • N acquisition points are selected on the reference zoom tracking curve, and the N collection points correspond to different zoom magnification values
  • an embodiment of the present invention further provides a calibration apparatus for a zoom tracking curve, including:
  • a sampling module configured to select N collection points on the reference zoom tracking curve, the N collection points corresponding to different zoom magnification values
  • a theoretical value obtaining module configured to acquire a theoretical focus position value corresponding to a sampling point of the N collection points on the reference zoom tracking curve
  • An actual value obtaining module configured to acquire, according to a preset autofocus algorithm, an actual focus position value when a focus estimation value reaches a maximum under a zoom magnification value corresponding to the collection point;
  • a correction module configured to repeatedly invoke the foregoing modules to perform corresponding operations, respectively acquiring the N collection point pairs The actual focus position value and the theoretical focus position value, and the corresponding correction distance of the reference zoom tracking curve at the N acquisition points, to complete the correction of the reference zoom tracking curve.
  • a computer program comprising computer readable code, when the computer readable code is run on a terminal device, causing the terminal device to perform any of the zoom tracking described above The correction method of the curve.
  • a computer readable medium storing a computer program for performing a correction method of any one of the above-described zoom tracking curves.
  • the embodiment of the invention has the following advantages:
  • Embodiments of the present invention provide a method and apparatus for correcting a zoom tracking curve, which acquires theoretical focus position values corresponding to the collection points by selecting N collection points of different zoom magnification values on a theoretical reference zoom tracking curve; According to the preset auto-focus algorithm, the actual focus position value when the focus estimation value reaches the maximum under the zoom magnification value corresponding to the collected points is obtained, based on the actual focus position value and the theoretical focus position value, and the correction distance between the two. , to complete the correction of the reference zoom tracking curve. That is, the embodiment of the present invention can obtain the actual zoom tracking curve of each lens itself, thereby ensuring that the actual reference zoom tracking curve that has been corrected is synchronously operated during zooming and auto focusing, so that the entire zoom process image can be focused clearly. .
  • FIG. 1 is a flowchart of a process of an embodiment of a zoom tracking curve correction method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a theoretical zoom tracking curve preset in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of selecting a collection point on a zoom tracking curve in an embodiment of the present invention.
  • FIG. 4 is a flowchart of a process of an embodiment of a zoom tracking curve correction method according to an embodiment of the present invention
  • FIG. 5 is a structural block diagram of an embodiment of a zoom tracking curve correcting apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a reference curve selection module in an embodiment of a zoom tracking curve correction device according to an embodiment of the present invention
  • FIG. 7 is a block diagram of a terminal device for performing a method according to an embodiment of the present invention.
  • FIG. 8 is a memory unit of an embodiment of the present invention for holding or carrying program code that implements a method in accordance with an embodiment of the present invention.
  • the method in the embodiment of the present invention is a process of zooming and autofocusing when an image is taken by a camera or a camera.
  • the method according to the embodiment of the present invention can also be applied to a mobile phone with a zoom, auto focus function, a PAD, a portable multimedia player (PMP), a TV, and the like.
  • FIG. 1 is a flowchart of a process of a zoom tracking curve correction method according to an embodiment of the present invention, which includes the following steps:
  • N collection points are selected on the reference zoom tracking curve, and the N collection points correspond to different zoom magnification values.
  • zoom tracking curve it is necessary to provide a pilot description of the zoom tracking curve. It is not difficult to understand that at least two zoom tracking curves having different focus distances are input in advance in the lens, please refer to FIG. 2.
  • the horizontal axis represents the zoom magnification value
  • the vertical axis represents the focus position value.
  • the zoom distances of 3 m, 6 m, 10 m, and infinity are selected in the present scheme.
  • the tracking curve is taken as an example to illustrate.
  • the method before step S11, further includes the step of: selecting a reference zoom tracking from the pre-stored at least two zoom tracking curves having different focus distances based on the preset first rule. curve.
  • the zoom tracking curves having different at least two different focusing distances are input to the imaging lens and stored in advance, for example, may be stored in advance in a storage medium, wherein the storage medium may be a synchronous dynamic random access memory (SDRAM). Multi-chip package (MCP) memory or dynamic random access memory (DRAM).
  • SDRAM synchronous dynamic random access memory
  • MCP Multi-chip package
  • DRAM dynamic random access memory
  • the initial zoom magnification value and the initial focus focus position value obtained when starting zooming are matched with the plurality of zoom tracking curves, and the closest one of the zooms is selected.
  • the trace curve is used as a reference zoom tracking curve. Referring to FIG. 4, the selected reference zoom tracking curve specifically includes the following steps:
  • the initial zoom magnification value is different from the pre-stored plurality of pieces according to the initial zoom magnification value.
  • this embodiment is applicable when the magnification value of the lens is greater than a certain value, that is, when the zoom tracking curves of different focus distances are distinct, the embodiment is suitable for zooming from a small zoom magnification value to a large zoom magnification value.
  • the current zoom magnification value is less than a certain value, that is, when the zoom tracking curves of different focus distances are more coincident under the current zoom magnification value, it is necessary to select several initial values to compare.
  • the reference zoom tracking curve is selected, it is also required to select N collection points on the reference zoom tracking curve, and the N collection points correspond to different zoom magnification values.
  • the zoom tracking curve of different focus distances has a high degree of coincidence, and fewer acquisition points should be selected at a small zoom magnification value; conversely, at a large zoom magnification value, different The zoom tracking curves of the focus distance are gradually separated, so that at a large zoom magnification value, more collection points are selected. That is, the number of collection points selected at different positions on the reference zoom tracking curve is proportional to the zoom odds value corresponding to the current position, and the specific sampling schematic is shown in FIG. 3.
  • the interval Tx of the collection point may be set to an inversely proportional to the zoom magnification value, so that the processor in the lens obtains the corresponding N according to the interval value calculated by the algorithm.
  • Collection points The embodiment is of course only exemplary, which is not limited by the embodiment of the present invention.
  • the method further includes the following steps:
  • the reference tracking curve selected in the foregoing step may be synchronously acquired to obtain a focus position value corresponding to a certain collection point, and the focus position value is used as the theoretical focus position value.
  • the method further includes the following steps:
  • the preset autofocus algorithm is a common climbing algorithm, and the focus motor is driven to move to different focus positions under the zoom magnification value corresponding to the collection point. And acquiring image data corresponding to the focus position value; and using the focus position value when the focus estimation value is maximum as the actual focus position value based on the image data and the preset focus estimation value function.
  • the focus motor is finely adjusted to change the distance between the lens and the captured object, and the lens is stopped based on a certain time or variable step size to obtain the current focus position.
  • One frame image is obtained by acquiring high frequency components of the image data along the horizontal X and the vertical Y, and calculating a focus evaluation value of the frame image based on a preset focus estimation value function. The above operation is repeatedly performed until the focus position value at which the focus evaluation value is maximum is obtained, which is the actual focus position value.
  • the preset focus evaluation value function is:
  • the x is a horizontal high-frequency component value
  • y is a vertical high-frequency component value.
  • the algorithm accumulates all the horizontal x and vertical y high-frequency energy values of the current frame image data obtained from the data image to obtain the Focus on the estimate.
  • the preset focus estimation function is associated with a scene in which the captured object is located, wherein the scene is identified by a preset scene recognition algorithm.
  • a plurality of different scene modes are preset, and each scene mode has a corresponding zoom magnification value, a light intensity value, a focus evaluation value function, a focus motor step size, and The criterion for the conclusion of the focus.
  • the method of an embodiment of the present invention further includes the following steps:
  • step S12 and step S13 are repeatedly performed, respectively acquiring the actual focus position value Focus1 zoom[N] and the theoretical focus position value Focus2 zoom[N] corresponding to the N collection points, and according to the actual focus position value.
  • Focus1 zoom [N] and the theoretical focus position value Focus2 zoom [N] calculate the corresponding correction distance focus zoom [N] , then the N correction distances corresponding to the N collection points can be obtained.
  • the calculation algorithm of the corrected distance is:
  • Focus zoom[N] Focus2 zoom[N] -Focus1 zoom[N] .
  • the correction of the reference zoom tracking curve may be implemented not only by the N acquisition points, but also by the linear difference method and the correction of any two adjacent acquisition points. Distance, an actual focus position value of a remaining point between the adjacent two acquisition points on the reference zoom tracking curve is calculated.
  • one embodiment of the embodiment of the present invention can be selected from N acquisition points of any adjacent two acquisition points Zoom [N] and zoom [N-1], and calculating the corresponding correction distance focus zoom Focus and zoom [N] [N-1], the calculated correction distance Focus adjacent arbitrary zoom ratio zoom zoom correspondence between the two collection points are:
  • Focus1 zoom focus zoom +Focus2 zoom
  • the actual focus position value of the remaining points between any two adjacent collection points can be obtained, and the specific number of samples can be determined according to actual conditions.
  • the more the number of samples the more the corrected zoom tracking curve is obtained. accurate.
  • the existing reference zoom tracking curve is corrected according to the acquired coordinates of at least N (zoom magnification value, actual focus position value).
  • the embodiment of the present invention provides a method for correcting a zoom tracking curve, which acquires theoretical focus corresponding to the collected points by selecting N collection points of different zoom magnification values on a theoretical reference zoom tracking curve.
  • Position value according to the preset autofocus algorithm, the actual focus position value when the focus estimation value reaches the maximum under the zoom magnification value corresponding to the collected points is obtained, based on the actual focus position value and the theoretical focus position value, and between the two Correct the distance to complete the correction of the reference zoom tracking curve. That is, the embodiment of the present invention can obtain the actual zoom tracking curve of each lens itself, thereby ensuring that the actual reference zoom tracking curve that has been corrected is synchronously operated during zooming and auto focusing, so that the entire zoom process image can be focused clearly. .
  • the focus motor when the actual focus position value is obtained, the focus motor is driven to move to a different focus position under the zoom magnification value corresponding to the collection point, and based on the image data corresponding to the focus position and the preset focus estimation value function.
  • the focus position value when the focus evaluation value is maximum is taken as the actual focus position value, and the focus estimation value function is associated with the scene corresponding to the image data. That is, the embodiment of the present invention can correct the zoom tracking curve of the lens in different scenarios, and improve the accuracy and verification efficiency of the calibration result.
  • the embodiment of the present invention further provides a zoom tracking curve correction device.
  • the sample module 11 the theoretical value acquisition module 12 , the actual value acquisition module 13 , and the correction module 14 are provided. .
  • the device according to the embodiment of the present invention is applied to a camera or a camera having a zooming and autofocus function.
  • the device according to the embodiment of the present invention can also be applied to a mobile phone with a zoom, auto focus function, a PAD, a portable multimedia player (PMP), a TV, and the like.
  • the embodiment of the present invention is exemplified by a digital camera as an example, but the embodiment does not constitute a limitation on the embodiment of the present invention.
  • the specific functions implemented by each module are specifically disclosed below.
  • the sampling module 11 is configured to select N collection points on the reference zoom tracking curve, the N collection points corresponding to different zoom magnification values.
  • zoom tracking curve it is necessary to provide a pilot description of the zoom tracking curve. It is not difficult to understand that at least two zoom tracking curves with different focus distances are input in advance in the lens. Please refer to FIG. 2. For convenience of description, the focus distances in this solution are 3 meters, 6 meters, 10 meters and infinity respectively.
  • the zoom tracking curve is illustrated as an example. In the coordinate system described in FIG. 2, the horizontal axis represents the zoom magnification value, and the vertical axis represents the focus position value.
  • the embodiment of the present invention further includes a reference curve selection module 10.
  • the reference curve selection module 10 is configured to: before the sampling module 11 performs the selection of N collection points on the reference zoom tracking curve, based on the preset first rule, from the pre-stored at least two zoom distances with different zoom distances The reference zoom tracking curve is selected in the tracking curve.
  • the embodiment of the present invention further includes a curve storage module, configured to input at least two focus distances before the reference curve selection module 10 selects the reference zoom tracking curve from the pre-stored zoom tracking curves having different focus distances. Different zoom tracking curves are stored.
  • the zoom tracking curves having different at least two different focusing distances are input to the imaging lens and stored in advance, for example, may be stored in advance in a storage medium, wherein the storage medium may be a synchronous dynamic random access memory (SDRAM). Multi-chip package (MCP) memory or dynamic random access memory (DRAM).
  • SDRAM synchronous dynamic random access memory
  • MCP Multi-chip package
  • DRAM dynamic random access memory
  • the reference curve selection module 10 may select an initial zoom magnification value and an initial focus focus position value obtained when starting zooming, and the plurality of zoom tracking curves.
  • the closest zoom tracking curve is used as the reference zoom tracking curve.
  • the reference curve selection module 10 further includes an initial value acquisition unit 101, a focus value acquisition unit 102, and a curve acquisition unit 103.
  • the initial value acquiring unit 101 is configured to acquire a current zoom motor position and a focus motor position when zooming is started, thereby obtaining an initial zoom magnification value and an initial focus position value;
  • the focus value obtaining unit 102 is configured to obtain, on each zoom tracking curve, a focus position value corresponding to the initial zoom magnification value
  • the curve obtaining unit 103 is configured to select a zoom tracking curve whose focus position value is closest to the initial focus position value as the reference zoom tracking curve.
  • the initial value acquiring unit 101 acquires the current zoom motor position and the position of the focus motor, and obtains a corresponding initial zoom magnification value and an initial value focus position value; then the focus value is obtained.
  • the unit 102 acquires a corresponding focus position value from the pre-stored zoom tracking curves of the plurality of different focus distances according to the initial zoom magnification value; then the curve acquisition unit 103 compares the initial focus position value with the obtained plurality of focus position values, and selects The zoom tracking curve corresponding to the closest focus position value is used as the reference zoom tracking curve.
  • this embodiment is applicable when the magnification value of the lens is greater than a certain value, that is, when the zoom tracking curves of different focus distances are distinct, the embodiment is suitable for zooming from a small zoom magnification value to a large zoom magnification value.
  • the initial value acquisition unit 101 is also required to select a plurality of initial values for comparison.
  • the sampling module 11 is further required to select N collection points on the reference zoom tracking curve, and the N collection points correspond to different Zoom magnification value.
  • the zoom tracking curve of different focus distances has a high degree of coincidence, and the sampling module 11 should select fewer acquisition points under a small zoom magnification value; otherwise, a large zoom.
  • the zoom tracking curves of different focus distances are gradually separated between each other, so at a large zoom magnification value, the sampling module 11 selects more collection points. That is, the number of collection points selected by the sampling module 11 at different positions on the reference zoom tracking curve is proportional to the zoom odds value corresponding to the current position.
  • FIG. 3 For a specific sampling diagram, please refer to FIG. 3.
  • the interval Tx at which the sampling module 11 acquires the acquisition point may be set to an inversely proportional to the zoom magnification value, so that the sampling module 11 calculates the interval according to the algorithm. Value to get the corresponding N collection points.
  • the embodiment is of course only exemplary, which is not limited by the embodiment of the present invention.
  • the theoretical value obtaining module 12 is configured to acquire a corresponding theory of a collection point of the N collection points on a reference tracking curve. Focus position value.
  • the theoretical value obtaining module 12 can synchronously follow the selected reference tracking curve in the reference curve selection module 11 to obtain a focus position value corresponding to a certain collection point, and use the focus position value as the theoretical focus position. value.
  • the actual value obtaining module 13 is configured to acquire an actual focus position value when the focus estimation value reaches a maximum under the zoom magnification value corresponding to the collection point based on the preset auto focus algorithm.
  • the preset auto-focusing algorithm is a common climbing algorithm
  • the actual value acquiring module 13 drives the focusing at a zoom magnification value corresponding to the collected point.
  • the motor moves to different focus position values, and acquires image data corresponding to the focus position value; based on the image data and the preset focus estimation value function, the focus position value when the focus estimation value is maximum is taken as the actual focus position value.
  • the actual value obtaining module 13 drives the focus motor to finely adjust the distance between the lens and the captured object under the zoom magnification value corresponding to the collection point, and stops the time based on a certain time or variable step size.
  • the lens acquires a frame image of the current focus position, acquires high frequency components of the image data along the horizontal X and the vertical Y, and calculates a focus evaluation value of the frame image based on a preset focus estimation value function.
  • the above operation is repeatedly performed until the actual value acquisition module 13 acquires the focus position value when the focus evaluation value is maximum, and the focus position value is the actual focus position value.
  • the preset focus evaluation value function is:
  • the x is a horizontal high-frequency component value
  • y is a vertical high-frequency component value.
  • the algorithm accumulates all the horizontal x and vertical y high-frequency energy values of the current frame image data obtained from the data image to obtain the Focus on the estimate.
  • the preset focus estimation function is associated with a scene in which the captured object is located, wherein the scene is identified by a preset scene recognition algorithm.
  • a plurality of different scene modes are preset, and each scene mode has a corresponding zoom magnification value, a light intensity value, a focus evaluation value function, a focus motor step size, and The criterion for the conclusion of the focus.
  • the actual value obtaining module 13 compares the zoom intensity value, the gain, and the light intensity information value in the preset plurality of scene modes by acquiring the light intensity information, the gain, and the zoom magnification value of the current image data, and selects the most matching scene.
  • the mode acquires a focus motor step size, a focus evaluation value function, and a focus end judgment criterion in the scene mode.
  • a correction module 14 is further included.
  • the correction module 14 is configured to repeatedly invoke the foregoing modules to perform corresponding operations, respectively acquiring actual focus position values and theoretical focus position values corresponding to the N collection points, and the reference zoom tracking curves are in the N collections. The corresponding correction distance is clicked to complete the correction of the reference zoom tracking curve.
  • the correction module 14 repeatedly invokes the foregoing theoretical value acquisition module 12 and the actual value acquisition module 13 to acquire the actual focus position values corresponding to the N collection points, Focus1 zoom [N] and the theoretical focus position value Focus2 zoom. [N] , according to the actual focus position value Focus1 zoom [N] and the theoretical focus position value Focus2 zoom [N] calculate the corresponding correction distance focus zoom [N] , the N correction distances corresponding to the N collection points can be obtained.
  • the calculation algorithm of the corrected distance is:
  • Focus zoom[N] Focus2 zoom[N] -Focus1 zoom[N] .
  • the correction module 14 may implement the correction of the reference zoom tracking curve not only by the N acquisition points, but also the linear difference method and any adjacent two.
  • the corrected distance of the collected points is calculated, and the actual focus position value of the remaining points between the adjacent two collection points on the reference zoom tracking curve is calculated.
  • the correction module 14 may select any two adjacent collection points zoom [N] and zoom [N-1] from the N collection points, and calculate the corresponding zoom correction distance Focus Focus and zoom [N] [N-1], corresponding to the adjacent zoom Focus correction distance calculated zoom ratio zoom any point between the two values is acquired:
  • the correction module 14 acquires a theoretical focus position Focus2 zoom corresponding to an arbitrary zoom magnification value zoom between the adjacent collection points zoom [N] and zoom [N-1] according to the reference zoom tracking curve, and then calculates the The zoom focus value zoom corresponds to the actual focus position Focus1 zoom :
  • Focus1 zoom focus zoom +Focus2 zoom
  • the correction module 14 can obtain the actual focus position values of a plurality of remaining points between any two adjacent collection points, and the specific number of samples can be determined according to actual conditions. The more the number of samples, the more accurate the corrected zoom tracking curve. Further, the existing reference zoom tracking curve is corrected according to the acquired coordinates of at least N (zoom magnification value, actual focus position value).
  • the embodiment of the present invention provides a calibration apparatus for a zoom tracking curve, which selects N collection points of different zoom magnification values on a theoretical reference zoom tracking curve by the sampling module 11 and obtains a module by a theoretical value. 12: acquiring the theoretical focus position value corresponding to the collection points; the actual value acquisition module 13 further acquires the actual focus position value when the focus estimation value reaches the maximum under the zoom magnification value corresponding to the collection points according to the preset auto focus algorithm, and finally passes The correction module 14 completes the correction of the reference zoom tracking curve based on the actual focus position value and the theoretical focus position value, and the corrected distance between the two.
  • the embodiment of the present invention can obtain the actual zoom tracking curve of each lens itself, thereby ensuring that the actual reference zoom tracking curve that has been corrected is the same in the subsequent zooming and autofocusing.
  • the step is run so that the entire zoom process image can be focused clearly.
  • the focus motor when the actual focus position value is obtained, the focus motor is driven to move to a different focus position under the zoom magnification value corresponding to the collection point, and based on the image data corresponding to the focus position and the preset focus estimation value function.
  • the focus position value when the focus evaluation value is maximum is taken as the actual focus position value, and the focus estimation value function is associated with the scene corresponding to the image data. That is, the embodiment of the present invention can correct the zoom tracking curve of the lens in different scenarios, and improve the accuracy and verification efficiency of the calibration result.
  • the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.
  • modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment.
  • the modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components.
  • any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined.
  • Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.
  • Embodiments of embodiments of the invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof.
  • a microprocessor or digital signal processor may be used in practice to implement some or all of the functionality of some or all of the components of an asynchronous login device in accordance with an embodiment of the present invention.
  • Embodiments of the invention may also be implemented as a device or device program (e.g., a computer program and a computer program product) for performing some or all of the methods described herein.
  • a program implementing an embodiment of the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.
  • FIG. 7 illustrates a terminal device that can implement a method of correcting a zoom tracking curve according to an embodiment of the present invention.
  • the terminal device conventionally includes a processor 710 and a computer program product or computer readable medium in the form of a memory 720.
  • Memory 720 can be an electronic memory such as a flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM.
  • Memory 720 has a memory space 730 for program code 731 for performing any of the method steps described above.
  • storage space 730 for program code may include various program code 731 for implementing various steps in the above methods, respectively.
  • the program code can be read from or written to one or more computer program products.
  • Such computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks.
  • Such a computer program product is typically a portable or fixed storage unit as described with reference to FIG.
  • the storage unit may have a storage section, a storage space, and the like arranged similarly to the storage 720 in the terminal device of FIG.
  • the program code can be compressed, for example, in an appropriate form.
  • the storage unit includes computer readable code 731', i.e., code readable by a processor, such as 710, that when executed by the terminal device causes the terminal device to perform each of the methods described above step.

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Abstract

L'invention concerne le domaine technique de la surveillance, et porte en particulier sur un procédé et un dispositif d'étalonnage d'une courbe de suivi de grossissement. Le procédé comprend les étapes suivantes : sélectionner N points de collecte sur une courbe de suivi de grossissement de référence, les N points de collecte correspondant à des valeurs de rapport de grossissement différentes ; obtenir la valeur d'emplacement de focalisation théorique correspondante d'un certain point de collecte dans les N points de collecte sur la courbe de suivi de grossissement de référence ; sur la base d'un algorithme de focalisation automatique prédéfini, obtenir une valeur d'emplacement de focalisation réelle à une valeur de rapport de grossissement correspondant au point de collecte lorsque la valeur d'estimation de focalisation devient la valeur maximum ; exécuter plusieurs fois les étapes ci-dessus, et obtenir respectivement les valeurs d'emplacement de focalisation réelles et les valeurs d'emplacement de focalisation théoriques correspondant aux N points de collecte, terminant ainsi l'étalonnage de la courbe de suivi de grossissement de référence. La propre courbe de suivi de grossissement réelle de chaque lentille peut être obtenue et son fonctionnement synchrone avec la courbe de suivi de grossissement de référence réelle étalonnée dans les processus de grossissement de suivi et de focalisation automatique peut être assuré de telle sorte que l'image est focalisée clairement dans le processus de grossissement global.
PCT/CN2016/110133 2015-12-23 2016-12-15 Procédé et dispositif d'étalonnage de courbe de suivi de grossissement WO2017107842A1 (fr)

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CN201510981884.8 2015-12-23
CN201510981884.8A CN105611159A (zh) 2015-12-23 2015-12-23 变焦跟踪曲线的校正方法和装置

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