Camera shutter modification method and system

Abstract

The present invention discloses a camera shutter modification method, comprising: obtaining a trigger signal for a camera to trigger an image sensor to sense light; removing the original shutter of the camera or keeping the original shutter normally open, installing a new shutter and connecting the new shutter to the camera signal; obtaining the working parameters of the new shutter, and configuring the working time of the new shutter based on the trigger signal. At the same time, the present invention also discloses a camera shutter modification system. The camera shutter modification method of the present invention can be used to modify the original shutter of the camera to install a suitable new shutter, and re-match the working time of the new shutter to ensure normal matching and response work with the camera, and can install a suitable shutter according to the camera use requirements, thereby improving the use range of the camera and the matching degree of the requirements, and has the characteristics of simple steps and good shutter modification effect.

Description

Technical Field

[0001] The invention relates to the technical field of cameras, in particular to a camera shutter modification method. Background Art

[0002] The shutter is a mechanism used by the camera to control the effective exposure time of the photosensitive film and is an important component of the camera.

[0003] Most cameras on the market are equipped with a focal plane shutter. The focal plane shutter has the characteristics of fast speed and the actual exposure time is not affected by the aperture. However, the focal plane shutter has a short service life, is difficult to replace, and is prone to deformation when shooting moving objects.

[0004] In fields such as aerial surveying, cameras must be able to take intensive photos for a long time and be replaced regularly. In addition, since deformed photos will cause the errors in the calculation results of the aerial triangulation algorithm of aerial survey to become larger or even make it impossible to calculate the results, the cameras used in aerial surveys must also ensure that the photos are not deformed when shooting high-speed moving objects. This places high demands on the service life of the camera shutter, the difficulty of replacement, and the quality of the camera's high-speed moving object photography. However, most cameras on the market today cannot meet the above requirements.

[0005] Therefore, how to obtain a camera that is more suitable for aerial surveying is an issue that we urgently need to solve. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a camera shutter modification method, which can be used for camera shutter modification to make the camera more suitable for aerial survey needs.

[0007] The purpose of the present invention is mainly achieved through the following technical solutions:

[0008] A camera shutter modification method comprises the following steps:

[0009] Obtain the trigger signal of the camera triggering the image sensor to sense light;

[0010] Remove the original shutter of the camera or keep the original shutter open, install a new shutter and connect the new shutter to the camera signal;

[0011] The new shutter working parameters are obtained, and the working time of the new shutter is configured according to the trigger signal.

[0012] Based on the above technical solution, it also includes:

[0013] Obtaining the light sensing start time of the image sensor under the triggering condition of the trigger signal;

[0014] Obtain the time difference between the trigger signal and the start of light sensing and determine whether the trigger signal needs to be compensated;

[0015] If compensation is required, determine the compensation time, use the compensation time to perform time compensation on the trigger signal, and use the time-compensated signal as the trigger signal.

[0016] Based on the above technical solution, the method of obtaining the time difference between the trigger signal and the start time of light sensing and determining whether the trigger signal needs to be compensated specifically includes:

[0017] Determine whether a time difference exists or whether the time difference meets the error requirement;

[0018] When the time difference is judged to be zero or the time difference meets the error requirement, no compensation is performed;

[0019] or,

[0020] When it is determined that the time difference exists and does not meet the error requirement, the trigger signal is delayed by a preset time so that the time difference meets the error requirement. The preset time is determined as the compensation time, and the trigger signal is time compensated using the preset time as the compensation value.

[0021] Based on the above technical solution, the new shutter working parameters include shutter response time; the configuring the working time of the new shutter based on the trigger signal includes: configuring the shutter response time of the new shutter according to the trigger signal.

[0022] Based on the above technical solution, the new shutter working parameters include shutter response time; the configuration of the new shutter working time according to the trigger signal includes: configuring the shutter response time to coincide with the trigger signal time, or the shutter response time to be before the trigger signal time. The above technical solution is implemented by configuring the shutter response time of the new shutter according to the trigger signal.

[0023] Based on the above technical solution, the new shutter working parameters include: shutter response time, the time when the shutter blade moves to the aperture;

[0024] The configuration of the working time of the new shutter according to the trigger signal includes: configuring the shutter response moment to coincide with the trigger signal moment, or the moment when the shutter blade moves to the aperture to coincide with the trigger signal moment, or the shutter response moment is before the trigger signal moment and the moment when the shutter blade moves to the aperture is after the trigger signal moment. Since the time difference between the moment when the shutter blade moves to the aperture and the shutter response moment is known, the moment when the shutter blade moves to the aperture can be controlled by controlling the shutter response moment. It can be seen that the above technical solution for configuring the working time of the new shutter according to the trigger signal can be implemented by configuring the shutter response moment of the new shutter according to the trigger signal.

[0025] Based on the above technical solution, the method further includes:

[0026] A shutter adjustment module is configured, and the exposure time is adjusted by the shutter adjustment module.

[0027] Based on the above technical solution, the method further includes:

[0028] A shutter adjustment module is configured to adjust the working time of the new shutter through the shutter adjustment module so that the shutter response moment coincides with the trigger signal moment, or the moment when the shutter blade moves to the aperture coincides with the trigger signal moment, or the shutter response moment is before the trigger signal moment and the moment when the shutter blade moves to the aperture is after the trigger signal moment, thereby adjusting the exposure time.

[0029] Based on the above technical solution, the method further includes:

[0030] The trigger signal is simulated to trigger the image sensor to sense light.

[0031] Based on the above technical solution, the new shutter is a lens shutter.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: the camera shutter modification method of the present invention can be used to modify the original shutter of the camera to install a suitable new shutter and re-match the working time of the new shutter to ensure normal matching and response with the camera. It can install a suitable shutter according to the camera usage requirements, improve the camera's usage range and demand matching, and has the characteristics of simple steps and good shutter modification effect.

[0033] Based on the above camera shutter modification method, the present invention also provides a camera shutter modification system, which includes:

[0034] An acquisition unit, used for acquiring a trigger signal for the camera to trigger the image sensor to sense light;

[0035] An execution unit, used for removing the original shutter of the camera or keeping the original shutter normally open, installing a new shutter and connecting the new shutter with the camera signal;

[0036] The configuration unit obtains new shutter working parameters and configures the working time of the new shutter according to the trigger signal.

[0037] The acquisition unit may further include:

[0038] An acquisition module is used to acquire the light-sensing start time of the image sensor under the triggering condition of the trigger signal;

[0039] A judgment module is used to obtain the time difference between the trigger signal and the start time of light sensing and determine whether the trigger signal needs to be compensated;

[0040] The compensation module is used to execute based on the result of the judgment module: if the trigger signal needs to be compensated, determine the compensation time, perform time compensation on the trigger signal with the compensation time, and use the time-compensated signal as the trigger signal.

[0041] The camera shutter modification system can quickly modify the camera shutter and ensure that the modified new shutter matches the camera. The modified camera can better meet the use requirements. The shutter modification is convenient and fast with a high matching degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0043] Figure 1 is a flow chart of a camera shutter modification method 100;

[0044] Figure 2 is a flow chart of the time compensation step in the camera shutter modification method 100;

[0045] Figure 3 is a flow chart of step 1026 in the camera shutter modification method 100;

[0046] Figure 4 is a step flow chart of step 106 in the camera shutter modification method 100;

[0047] Figure 5 is another step flow chart of step 106 in the camera shutter modification method 100;

[0048] Figure 6 This is a diagram of the relationship between the camera and shutter signals and their time sequence. The vertical axis represents different signals, and the horizontal axis represents the sequence of different time points of different signals.

[0049] Figure 7 yes Figure 4 Schematic diagram of blade positions corresponding to the three moments t0, t1 and t2;

[0050] Figure 8 is a block diagram of a camera shutter modification system 200;

[0051] Fig. 9 2 is a structural block diagram of the acquisition unit 202 in the camera shutter modification system 200 . DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0053] The first embodiment of the present invention provides a camera shutter modification method 100, which can modify and match the required new shutter to the camera and replace the original shutter, so that the camera and the new shutter form a new camera product, which can meet the technical usage requirements of different fields and usage environments.

[0054] like Figure 1 As shown, the camera shutter modification method 100 specifically includes the following steps:

[0055] Step 102: Obtain a trigger signal for the camera to trigger the image sensor to sense light.

[0056] Step 104: remove the original shutter of the camera or keep the original shutter open, install a new shutter and connect the new shutter to the camera signal.

[0057] Step 106: Acquire new shutter operating parameters, and configure the new shutter operating time based on the trigger signal.

[0058] The camera shutter modification method 100 obtains a trigger signal of the camera image sensor's photosensitivity and configures the working time of the new shutter based on the trigger signal, so that the trigger signal enables the camera and the new shutter to work and match normally after the new shutter modification is completed, thereby realizing the camera shutter modification. The newly modified camera forms a new camera product and meets the needs, thereby improving the camera's use range and demand matching degree. The method has the characteristics of simple steps and good shutter modification effect.

[0059] It should be noted that there are many types of shutters, including focal plane shutter, reflex mirror shutter, rear-lens shutter, aperture shutter, lens shutter, front-lens shutter, etc. The above original shutter and new shutter can theoretically be any different shutter types, depending on the camera configuration, usage field and demand. This embodiment does not specifically limit the selection of the two. Just to facilitate the understanding and implementation of this embodiment, taking the aerial survey field as an example, the original shutter described below can be understood as a focal plane shutter, and the new shutter can be understood as a lens shutter.

[0060] Continue to see Figure 1 Step 102 is mainly used to obtain a trigger signal of the image sensor to provide a basis for configuring a new shutter working time.

[0061] Specifically, in step 102, the trigger signal of the image sensor can be obtained by using an oscilloscope, a spectrum analyzer, a waveform recorder and other information acquisition equipment, wherein the trigger signal refers to the trigger signal used by the camera image sensor to trigger the start of light sensing after the camera receives the start signal of taking pictures, and the trigger signal is sent by the camera later than the start signal of taking pictures. In some embodiments, the image sensor is a photosensitive element of the camera, which can be a CMOS (complementary metal oxide semiconductor), a CCD (charge coupled device), etc.

[0062] In order to further accurately configure the working time of the new shutter, the step 102 also includes a time compensation step, which is mainly used to perform time compensation on the trigger signal.

[0063] like Figure 2 As shown, the time compensation steps include:

[0064] Step 1022: Obtain the light sensing start time of the image sensor under the triggering condition of the trigger signal.

[0065] Step 1024: Obtain the time difference between the trigger signal and the start time of photosensing and determine whether the trigger signal needs to be compensated.

[0066] Step 1026: If compensation is required, determine the compensation time, perform time compensation on the trigger signal with the compensation time, and use the time-compensated signal as the trigger signal.

[0067] This time compensation step can perform time compensation on the trigger signal based on the compensation time, and the compensated trigger signal can be used as a trigger signal for the camera of the new shutter to trigger the image sensor to sense light, so as to accurately control the response time and exposure time adjustment of the new shutter.

[0068] Specifically, in step 1022, the light sensing start time of the image sensor under the triggering condition of the trigger signal can be acquired based on the above-mentioned trigger signal acquisition device or method.

[0069] Step 1024 is mainly used to obtain the time difference between the trigger signal and the start time of photosensitization, and determine whether to compensate the trigger signal based on the time difference. When compensation is required, step 1026 is executed.

[0070] Step 1026 is mainly used to determine the compensation time and perform time compensation operations on the trigger signal that needs to be compensated.

[0071] like Figure 3 As shown, in step 1026, obtaining the time difference between the trigger signal and the start time of light sensing and determining whether the trigger signal needs to be compensated specifically includes the following steps:

[0072] Step 10262: Determine whether a time difference exists or whether the time difference meets the error requirement.

[0073] Step 10264: when it is determined that the time difference is zero or the time difference meets the error requirement, no compensation is performed;

[0074] or,

[0075] Step 10266: When it is determined that the time difference exists and does not meet the error requirement, the trigger signal is delayed by a preset time so that the time difference meets the error requirement. The preset time is determined as the compensation time, and the trigger signal is time compensated using the preset time as the compensation value.

[0076] Specifically, in step 10262, whether a time difference exists or whether the time difference meets the error requirement can be directly read through the display information of the information acquisition device, or can be obtained through data export and calculation. The error requirement is the error value allowed for the time difference under the premise of normal operation of the camera. Specifically, the error value can be a certain value. For example, if the time difference does not exceed the value when judging, the time difference meets the error requirement. If the time difference exceeds the value when judging, the time difference does not meet the error requirement. Specifically, the error value can also be a numerical range of a certain interval. For example, if the time difference is within the numerical range when judging, the time difference meets the error requirement. If the time difference is not within the numerical range when judging, the time difference does not meet the error requirement. In some embodiments, the error value of the error requirement is a numerical range, such as 0≤T 误差 ≤100, T 误差 This is the error value (unit: microseconds).

[0077] After the time difference determination result is obtained in step 10262, step 10264 or step 10266 may be selected to be executed:

[0078] 1. When it is determined that the time difference is zero or the time difference meets the error requirement, it is determined that the trigger signal does not need to be compensated, and the compensation time can also be determined to be zero. At this time, step 10264 is executed to use the compensated trigger signal as the trigger signal.

[0079] 2. When it is determined that the time difference exists and the time difference does not meet the error requirement, it is determined that the trigger signal needs to be compensated. At this time, step 10266 is executed to perform a signal compensation operation: the trigger signal is delayed by a preset time until the time difference meets the error requirement, so that the preset time is used as the compensation time to compensate the trigger signal. In some embodiments, when the time difference is a fixed value, the preset time can directly use the time difference value as the compensation time; when the time difference value is large and is a fluctuating value, it is necessary to combine the time difference fluctuation range and the error requirement to calculate to obtain the preset time. At this time, there may be multiple preset times, as long as they meet the error requirements, you can choose one, or calculate the preset time for compensation according to multiple preset times, or according to the numerical range of multiple preset times, select a value from the range as the preset time. It should be noted that the calculation method of the preset time is a simple numerical addition and subtraction or numerical range addition and subtraction or numerical selection, which belongs to the existing calculation method, and the calculation process is not described in detail here. For example, a certain model of camera used in the experiment has a large time difference between the trigger signal obtained and the start of photosensitivity, and the time difference has different values ​​in multiple experiments. It is found through experiments that delaying the trigger signal by a preset time can make the time difference between the trigger signal and the start of photosensitivity meet the error requirements. Therefore, time compensation is performed on the trigger signal, and the time of the delayed trigger signal can be approximately used as the start of photosensitivity.

[0080] It should be noted that the trigger signals mentioned subsequently, as long as they meet the time compensation conditions, should be understood to refer to the trigger signals after time compensation, which can be calculated and obtained through the above step 1026.

[0081] Continue reading Figure 1 , step 104 is mainly used for setting and installing the camera shutter structure.

[0082] In step 104, to ensure the normal use of the new shutter, the original shutter can be removed by tools, equipment or automated operation. During removal, if the original shutter is a shutter type installed inside the camera, such as a focal plane curtain shutter, the shutter is generally installed at the front end of the camera body, and the shutter can be exposed and removed by removing the camera housing (upper cover, bottom cover and front cover). If the original shutter is connected to the outside of the camera by a clip, such as a lens shutter, it can be directly removed. The original shutter can also be controlled by the camera's own control function, control panel or control button to keep it open, such as the B gate or T gate of some digital cameras. This method is more suitable for shutters located inside the camera or shutters that are inconvenient to remove, such as focal plane curtain shutters, and can reduce the difficulty and time of shutter removal.

[0083] Further, in step 104, after the original shutter is adjusted, a new shutter can be installed. The new shutter can be installed based on its installation method, such as installing the central shutter between the lenses, the lens mount of the central shutter is paired with the camera holder for installation, or the existing central shutter lens is paired with the camera holder for installation. After installation, it is also necessary to ensure that the new shutter is connected to the camera signal. The new shutter signal connection can be connected to the camera through a connecting line, a signal contact or Bluetooth.

[0084] Continue reading Figure 1 Step 106 is mainly used for parameter configuration of the camera and the new shutter to ensure that the new shutter can match the camera after installation.

[0085] In step 106, the new shutter working parameters can be obtained directly from the new shutter manual, or through information acquisition devices such as oscilloscopes, spectrum analyzers, waveform recorders, etc. After obtaining the new shutter working parameters, the new shutter working time can be configured based on the trigger signal. Specifically: the camera triggers the image sensor to sense light based on the trigger signal, thereby accurately controlling the start time of the image sensor's light sensing. The new shutter can accurately adjust the shutter response time based on the trigger signal to ensure that it starts working within the specified opening time, thereby ensuring that the new shutter matches the camera by configuring the new shutter working time.

[0086] Based on this, when configuring the new shutter working time, in order for the new shutter to be opened within the specified opening time, the new shutter working parameters obtained should at least include the shutter response time, so that we can configure the new shutter working time by configuring the shutter response time to ensure that the camera matches the new shutter operation.

[0087] Specifically, Figure 4 As shown, in order to match the image sensor's photosensitivity start time with the shutter's operating state, the new shutter's operating time can be adjusted by configuring the shutter response time, specifically:

[0088] Step 1062: Obtain new shutter operating parameters, where the new shutter operating parameters include: shutter response time.

[0089] Step 1064, configuring the working time of the new shutter based on the trigger signal, including: configuring the shutter response time of the new shutter based on the trigger signal, configuring the shutter response time to coincide with the trigger signal time, or configuring the shutter response time to be before the trigger signal time.

[0090] After obtaining the shutter response time in step 1062, since the trigger signal is the moment when photosensitivity starts, as long as the shutter response time of the new shutter is before the trigger signal or coincides with the trigger signal, the new shutter can be started before photosensitivity is required or at the same time as photosensitivity when used, thereby matching the operation of the camera and ensuring that the new shutter can be opened normally.

[0091] The above method can be applied to the working configuration of a focal plane curtain shutter. For a focal plane curtain shutter, when configuring the working time of a new shutter based on a trigger signal, the shutter response time is configured. The shutter response time is fixed relative to the time of the trigger signal. The shutter response time is before the trigger signal time or the two coincide with each other. The exposure time has nothing to do with the shutter response time or the shutter working time. The exposure time is determined based on the preset width when the two curtains maintain the preset width when moving. The shutter adjustment module will be matched with other parameters of the shutter (such as the preset width) to adjust the exposure time. Therefore, for a new shutter whose exposure time has nothing to do with the shutter response time or the shutter working time, the above configuration method can be used to complete the configuration of the shutter working time to be replaced, ensuring that the new shutter is used in conjunction with the camera.

[0092] At the same time, the above new shutter configuration method is also applicable to other shutters whose exposure time is related to shutter response time or shutter working time, such as the lens shutter. When configuring the working time of the new shutter based on the trigger signal, the general principle is to configure the shutter response time to coincide with the trigger signal time, or the shutter response time to be before the trigger signal time. Therefore, the above new shutter configuration method is applicable to all new shutters.

[0093] It should be noted that, for a shutter with a working mode such as a leaf shutter, the shutter working time refers to the entire time from the shutter response to full closure and then to opening. It can be specifically divided into the following action time set according to the shutter blade and aperture status: from the shutter response moment (also the power-on moment) → blade motor response → blade moves to aperture → blade moves from aperture position to blade closed position → blade remains closed → shutter starts to open → shutter opens. Therefore, the entire time from the start to the end of the above action is the working time of the shutter, and the time of "blades moving to aperture → blades moving from aperture position to blade closed position" determines the shortest exposure time of the shutter. Therefore, if the overall shutter response time of "from shutter response moment → blade motor response → blades moving to aperture" can be obtained, and combined with the "image sensor photosensitivity start moment" to control the start and / or end time of "from shutter response moment → blade motor response → blades moving to aperture", the shutter exposure time can be controlled, and then the overall shutter response time and working time can be adjusted, and the shutter can be opened or closed at an appropriate time, so that the shutter can match the camera operation. Combined with the above, the new shutter working time can be well configured to match the camera.

[0094] Based on this, the configuration accuracy can be further improved according to the movement of the shutter blades, such as Figure 5 As shown, the specific configuration steps are as follows:

[0095] Step 1066, obtaining new shutter operating parameters, wherein the new shutter operating parameters include: shutter response time, and time when the shutter blade moves to the aperture;

[0096] Step 1068, configuring the working time of the new shutter based on the trigger signal, including: configuring the shutter response time to coincide with the trigger signal time, or the time when the shutter blade moves to the aperture to coincide with the trigger signal time, or the shutter response time is before the trigger signal time and the time when the shutter blade moves to the aperture is after the trigger signal time.

[0097] The above working configuration method of the new shutter can be applied to the working configuration of most shutter types with leaves, such as the working mode of the lens shutter. The above configuration method can be used to complete the configuration of the shutter working time to be replaced, ensuring that the new shutter is used in conjunction with the camera.

[0098] like Figure 6 , Figure 7 As shown, in specific use, since the overall response time of the new shutter is the entire time from "shutter response time → blade motor response → blade movement to aperture", the trigger signal start time is the time point. When the trigger signal start time is within the overall response time of the new shutter, since the trigger signal has been time-compensated, there is no or almost no time difference between it and the image sensor's photosensitivity start time. At this time, only the new shutter needs to work in conjunction with the image sensor. Therefore, the trigger signal start time can be approximately regarded as the image sensor's photosensitivity start time. It can be seen that the exposure time of the image sensor is equal to or approximately equal to the time period from the trigger signal start time to "the blade moves to the blade closed position" (i.e. Figure 6 When the trigger signal starts at the same time as the “shutter response time”, that is, the two coincide, the image sensor exposure time is the longest; when the trigger signal starts at the same time as the “blades move to the aperture”, that is, the two coincide, the image sensor exposure time is the shortest.

[0099] Based on this, since the time difference between the camera receiving the start signal to give the trigger signal is fixed, for the lens shutter, the modified camera can adjust the exposure parameters of the shutter and aperture to adjust the exposure. The adjustment principle is as follows:

[0100] 1. Adjustment of the shutter (i.e., exposure time): By adjusting the "shutter response time" of the new shutter, the time point position of the trigger signal start time between the overall response time of the new shutter (i.e., t0-t1) can be determined, and the exposure time of the new shutter can be controlled, so that when the camera obtains the shooting start signal, the new shutter can be closed or opened in a timely manner to ensure working coordination with the camera, shutter, and image sensor, and complete the configuration of the new shutter working time; set or use the existing shutter adjustment module, the adjustment range of the shutter adjustment module corresponds to the maximum and minimum exposure time, that is, when the shutter adjustment module is adjusted to the maximum exposure time, the "shutter response time" coincides with the trigger signal time (i.e., t0 coincides with d), and when the shutter adjustment module is adjusted to the minimum exposure time, the "blade moving to the aperture" coincides with the trigger signal time (i.e., t1 coincides with d);

[0101] 2. Regarding the adjustment of the aperture: adjusting the size of the aperture hole means adjusting the "time when the blades move to the aperture" (i.e. t1); setting or using the existing aperture adjustment module to adjust the aperture, it can be seen that after adjusting the aperture, it will affect the position of t1, which in turn will affect the adjustment range of the shutter adjustment module.

[0102] When in use, it is no different from a conventional camera, and the photo quality is adjusted by adjusting the shutter, aperture, sensitivity and other exposure parameters. It should be noted that during the aerial survey process, the aperture is usually fixed, so it is preferred to adjust the exposure only by adjusting the shutter exposure time.

[0103] The above-mentioned shutter adjustment module can be a shutter parameter adjustment module such as a dial, wave wheel, button, knob, function circle, etc. with a shutter speed adjustment function of an existing camera or shutter, or it can be adjusted through software in camera external devices such as computers and mobile devices. Therefore, the shutter and aperture adjustment modules can adopt the above-mentioned adjustment method.

[0104] It should be noted that since the trigger signal is basically sent by the original shutter after it performs the scheduled work, the camera will not officially send out the trigger signal until it receives the signal that the scheduled work is completed, and will start the photosensing work. For example, the focal plane shutter needs to measure the light of the image sensor before officially sensing light. After the light measurement is completed, the image sensor is reset, and the camera sends out a trigger signal to start sensing light. When the original shutter is removed or kept open, the camera cannot receive the corresponding scheduled work completion signal. Therefore, after the modification, after the camera receives the shooting start signal, it or the external device that cooperates with it can simulate the trigger signal or the compensated trigger signal according to the time requirements, and use the trigger signal as the photosensitive signal of the image sensor of the modified camera to trigger the image sensor to sense light.

[0105] Furthermore, the simulation of sending a trigger signal can be realized through the camera's own control system. In some embodiments, when the new shutter is a shutter with a control system, such as an electronic shutter, the above trigger signal can also be simulated and sent through the new shutter control system, that is, after the new shutter receives the shooting start signal, the new shutter can simulate sending a trigger signal according to the time requirement, and use the trigger signal as a light-sensitive signal of the image sensor of the modified camera to trigger the image sensor to sense light. Furthermore, the simulation of sending a trigger signal can also be achieved by sending a trigger signal through a camera external device such as a computer or a mobile device, or it can be sent by a unified control module of multiple cameras. Of course, other signal sending methods can also be used for simulation, which will not be listed in this embodiment.

[0106] The above is the overall technical solution content of the camera shutter modification method 100. In order to better understand and implement the camera shutter modification method 100, the camera shutter modification method 100 is further explained below in combination with specific numerical values.

[0107] like Figure 6 , Figure 7 As shown, after the camera obtains the shooting start signal a, the camera or shutter simulates sending a trigger signal d, and the trigger signal d is obtained by time compensation for the trigger signal c that triggers the image sensor to sense light.

[0108] The camera working parameters are obtained. The camera working parameters at least include the shutter working time. The shutter working time includes the overall response time t0-t1 from the lens shutter response time t0 (which can also be the power-on time) to the motor response to the blade moving to the aperture position, as well as the closing time t1-t2 of the blade moving from the aperture position to the blade closing, the blade keeping closed time t2-t3, and the blade starting to open time t3, where t0, t1, and t2 correspond to the blade positions as follows: Figure 7 As shown. The blade motor response is completed between t0 and t1. Figure 6 and Figure 7 , t0-t1 is the overall response time of the new shutter. After time compensation, the trigger signal d is equal to or approximately equal to the start time of the image sensor's photosensitivity. By controlling the positional relationship between the shutter response time t0 and the trigger time d, the trigger signal d is located within the t0-t1 time period (including the endpoints), thereby controlling the overall exposure time de (t2) of the new shutter. At e (t2), the shutter blades are completely closed and the image sensor has completed photosensitivity. At f, the image sensor signal reading is completed. At this time or thereafter (i.e., f and t3 can coincide), the shutter blades are controlled to open to ensure that the shutter blades of the image sensor are not opened before the photosensitivity → reading work is completed to prevent light from entering. By controlling the closing and opening time of the new shutter, the new shutter can be matched with the camera's work, and the new shutter can be used as an integral structure with the camera. Among them, t0 is adjusted by the shutter adjustment module.

[0109] Combination Figure 6 and Figure 7 It can be seen that the overall response time t0-t1 of the new shutter is related to the position of the aperture. When the aperture hole becomes larger, t1 will be closer to t0 in the t0-t1-t2 time curve. When the aperture hole becomes smaller, t1 will be closer to t2, and the length of t0-t2 remains unchanged. Figure 6 It can be seen that the exposure time is from time d to time e (t2). When d and t1 do not overlap, d-t1 is in the state of maximum light flux. At t1-e (t2), the shutter gradually closes and the light flux decreases. Therefore, when the position of t0 is fixed, the position of t1 will also affect the exposure. It can be seen that t0 and t1 are both adjustable exposure parameters that determine the exposure. Among them, t1 is adjusted by the aperture adjustment module. Preferably, when the aperture is fixed, that is, t1 is fixed, only t0 needs to be adjusted.

[0110] The above is for a shutter with the working characteristic of an in-lens shutter. The exposure time of this type of shutter is determined by the shutter response time. As long as the new shutter is a shutter with the working characteristic of an in-lens shutter, the above method can be used.

[0111] For other types of shutters, the exposure time is not determined by the shutter response time, but by other parameters. For example, for a focal plane curtain shutter, during exposure, the two curtains maintain a preset width and move, and the exposure time is determined by the preset width of the two curtains. Therefore, for another embodiment of the present invention, when configuring the working time of a new shutter based on a compensated trigger signal, the shutter response time is configured, and the shutter response time is fixed relative to the time of the trigger signal. The shutter response time is before the trigger signal time or the two coincide with each other. The shutter adjustment module matches other parameters of the shutter (such as the two curtains maintain a preset width) to adjust the exposure time. It can be seen from the above embodiments that the principle of replacing the shutter is to configure the shutter response moment based on the trigger signal so that the image sensor starts to sense light and matches the working state of the shutter. Therefore, the shutter response moment of the new shutter configured based on the trigger signal is applicable to all replaced shutters, and the working time of the new shutter is configured based on the trigger signal, so that the shutter response moment and the trigger signal moment maintain a preset relationship, such as the relatively fixed relationship in the focal plane curtain shutter embodiment, such as the shutter adjustment module in the lens shutter embodiment can adjust the shutter response moment relative to the trigger signal moment, and after the shutter adjustment module is adjusted and fixed, the shutter response moment is fixed relative to the trigger signal moment.

[0112] like Figure 8 As shown, based on the above camera shutter modification method 100, the second embodiment of the present invention discloses a camera shutter modification system 200, which includes:

[0113] An acquisition unit 202 is used to acquire a trigger signal for the camera to trigger the image sensor to sense light;

[0114] An execution unit 204 is used to remove the original shutter of the camera or keep the original shutter open, install a new shutter and connect the new shutter to the camera signal;

[0115] The configuration unit 206 obtains new shutter working parameters and configures the working time of the new shutter according to the trigger signal.

[0116] like Fig. 9 As shown, the acquisition unit 202 may further include:

[0117] An acquisition module 2022 is used to acquire the light sensing start time of the image sensor under the triggering condition of the trigger signal;

[0118] The judgment module 2024 is used to obtain the time difference between the trigger signal and the start time of light sensing and determine whether the trigger signal needs to be compensated;

[0119] The compensation module 2026 is used to execute based on the result of the judgment module 2024: if the trigger signal needs to be compensated, determine the compensation time, perform time compensation on the trigger signal with the compensation time, and use the time-compensated signal as the trigger signal.

[0120] The camera shutter modification system 200 obtains the camera trigger signal through the acquisition unit 202, and performs time compensation on the trigger signal when necessary. After the camera shutter structure modification is completed through the execution unit 204, the configuration unit 206 configures the working time of the new shutter based on the trigger signal obtained by the acquisition unit 202, thereby realizing rapid modification of the camera shutter. The modified new shutter can be well paired with the camera, and has the characteristics of convenient and fast modification and good camera modification effect. The modified camera can be more suitable for use in fields such as aerial surveying.

[0121] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for modifying a camera shutter, characterized in that: include: Obtain the trigger signal of the camera triggering the image sensor to sense light; Remove the original shutter of the camera or keep the original shutter open, install a new shutter and connect the new shutter to the camera signal; Acquire new shutter working parameters, and configure the new shutter working time according to the trigger signal; Wherein, obtaining a trigger signal for the camera to trigger the image sensor to sense light further includes: obtaining a light sensing start time of the image sensor under the triggering condition of the trigger signal; Obtaining the time difference between the trigger signal and the start time of light sensing and determining whether the trigger signal needs to be compensated; the obtaining the time difference between the trigger signal and the start time of light sensing and determining whether the trigger signal needs to be compensated specifically includes: Determine whether a time difference exists or whether the time difference meets the error requirement; When the time difference is judged to be zero or the time difference meets the error requirement, no compensation is performed; or, When it is determined that the time difference exists and does not meet the error requirement, the trigger signal is delayed by a preset time so that the time difference meets the error requirement. The preset time is determined as the compensation time, and the trigger signal is time compensated with the compensation time, and the time-compensated signal is used as the trigger signal.

2. The camera shutter modification method according to claim 1, characterized in that: The new shutter working parameters include: shutter response time, the time when the shutter blade moves to the aperture; Configuring the working time of the new shutter according to the trigger signal includes: configuring the shutter response moment to coincide with the trigger signal moment, or the moment when the shutter blade moves to the aperture to coincide with the trigger signal moment, or the shutter response moment is before the trigger signal moment and the moment when the shutter blade moves to the aperture is after the trigger signal moment.

3. The camera shutter modification method according to claim 2, characterized in that: The method further includes: A shutter adjustment module is configured, and the exposure time is adjusted through the shutter adjustment module.

4. The camera shutter modification method according to claim 2, characterized in that: The method further includes: A shutter adjustment module is configured to adjust the working time of the new shutter through the shutter adjustment module so that the shutter response moment coincides with the trigger signal moment, or the moment when the shutter blade moves to the aperture coincides with the trigger signal moment, or the shutter response moment is before the trigger signal moment and the moment when the shutter blade moves to the aperture is after the trigger signal moment, thereby adjusting the exposure time.

5. The camera shutter modification method according to any one of claims 1 to 4, characterized in that: The method further includes: The trigger signal is simulated to trigger the image sensor to sense light.

6. The camera shutter modification method according to any one of claims 1 to 4, characterized in that: The new shutter is a lens shutter.

7. A camera shutter modification system, used to implement the camera shutter modification method according to any one of claims 1 to 6, characterized in that: include: An acquisition unit, used for acquiring a trigger signal for the camera to trigger the image sensor to sense light; An execution unit, used for removing the original shutter of the camera or keeping the original shutter normally open, installing a new shutter and connecting the new shutter with the camera signal; The configuration unit obtains new shutter working parameters and configures the working time of the new shutter according to the trigger signal.

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