WO2022253300A1 - Appareil et procédé de commande de génération d'image basés sur un appareil à cristaux liquides lcd - Google Patents

Appareil et procédé de commande de génération d'image basés sur un appareil à cristaux liquides lcd Download PDF

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Publication number
WO2022253300A1
WO2022253300A1 PCT/CN2022/096774 CN2022096774W WO2022253300A1 WO 2022253300 A1 WO2022253300 A1 WO 2022253300A1 CN 2022096774 W CN2022096774 W CN 2022096774W WO 2022253300 A1 WO2022253300 A1 WO 2022253300A1
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WIPO (PCT)
Prior art keywords
liquid crystal
image
lcd liquid
light
control module
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PCT/CN2022/096774
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English (en)
Chinese (zh)
Inventor
简伟明
皮爱平
黄飞鹰
梁华贵
陈吉宏
黄伟涛
郑则润
陈秋榕
董莺
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简伟明
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Publication of WO2022253300A1 publication Critical patent/WO2022253300A1/fr

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/71Circuitry for evaluating the brightness variation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/75Circuitry for compensating brightness variation in the scene by influencing optical camera components
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80Camera processing pipelines; Components thereof
    • H04N23/84Camera processing pipelines; Components thereof for processing colour signals

Definitions

  • the embodiments of the present application relate to the image field, and in particular to an image generation control device and method based on an LCD liquid crystal device.
  • ISP Image Signal Processor
  • the ISP based on the rear camera of the mobile phone has the function of controlling the voice coil motor to achieve automatic focus.
  • the image sensor After the lens of the camera projects the optical signal to the photosensitive area of the image sensor, the image sensor undergoes photoelectric conversion and sends the original image in Bayer format to the ISP, and the ISP outputs the image in the RGB space domain through algorithm processing to the back-end for processing unit.
  • the ISP controls the lens and image sensor through the firmware program running on it, and completes automatic iris, black level compensation, lens correction, bad pixel correction, noise removal, automatic exposure, automatic white balance, Color correction, color interpolation, gamma correction, color space conversion, image output and other functions. In this way, the dynamic adjustment of image brightness and darkness cannot be realized efficiently, nor can regional image adjustment be realized, so as to realize complex functions with good user experience, which needs to be improved.
  • Embodiments of the present invention provide an image generation control system, method, device, and storage medium based on an LCD liquid crystal device, which expands image generation functions, enables efficient dynamic adjustment of generated images, and optimizes user experience.
  • an embodiment of the present invention provides an image generation control system based on an LCD liquid crystal device, including an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor;
  • the ISP control module communicates with the The communication module is connected to the image sensor, the communication module is connected to an external system, and the LCD liquid crystal light control module is connected to the ISP control module;
  • the ISP control module is used to determine the corresponding first control information according to the image generated by the image sensor and the illumination adjustment strategy;
  • the first control information generated by the ISP control module is transmitted to the LCD liquid crystal light control module;
  • the LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate;
  • the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image for the ISP control module to generate based on the generated image and light adjustment strategy The second control information of the corresponding overall image.
  • the embodiment of the present invention also provides an image generation method based on an LCD liquid crystal device, including:
  • the ISP control module determines the corresponding first control information according to the image generated by the image sensor and the illumination adjustment strategy, and transmits the generated first control information to the LCD liquid crystal light control module;
  • the LCD liquid crystal light control module controls the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate;
  • the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image for the ISP control module to generate based on the generated image and light adjustment strategy The second control information of the corresponding overall image.
  • the embodiment of the present invention also provides an image generating device based on an LCD liquid crystal device, the device comprising:
  • processors one or more processors
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the image generation method based on the LCD liquid crystal device described in the embodiment of the present invention.
  • the embodiment of the present invention also provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute the LCD liquid crystal device-based method according to the embodiment of the present invention when executed by a computer processor. image generation method.
  • the image generation control system includes an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor;
  • the ISP control module is connected to the communication module and the image sensor respectively, and the The communication module is connected to an external system, and the LCD liquid crystal light control module is connected to the ISP control module; wherein, the ISP control module is used to determine the corresponding first control information according to the image generated by the image sensor and the illumination adjustment strategy;
  • the first control information generated by the ISP control module is transmitted to the LCD liquid crystal light control module;
  • the LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the The LCD liquid crystal device adjusts the light transmission rate;
  • the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control module
  • the second control information corresponding to the overall image is generated based on the generated image and the light adjustment strategy.
  • FIG. 1 is a flow chart of an image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention
  • FIG. 2 is a schematic schematic diagram of an exemplary LCD screen
  • FIG. 3 is an exemplary flip effect diagram of liquid crystal molecules
  • FIG. 4 is a schematic diagram of an exemplary liquid crystal polarization characteristic
  • FIG. 4a is a schematic diagram of another exemplary liquid crystal screen
  • Fig. 4b is a schematic diagram of another exemplary liquid crystal screen principle
  • Fig. 5 is the schematic diagram of a kind of LCD multi-crystal panel provided by the present invention.
  • FIG. 6 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • Fig. 7 is a schematic diagram of an exemplary transmittance voltage control curve
  • FIG. 8 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • Fig. 9 is a schematic diagram including strong light provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of adding mask information to an image provided by an embodiment of the present invention.
  • FIG. 11 is a picture based on the output of an LCD liquid crystal device provided by an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of adjusting a polycrystalline unit provided by an embodiment of the present invention.
  • FIG. 13 is a flowchart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • FIG. 14 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • FIG. 15 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • FIG. 16 is a structural block diagram of an image generating device based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of an image generating device based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • Fig. 1 is the flow chart of a kind of image generation method based on LCD liquid crystal device that the embodiment of the present invention provides, its function is corresponding to the function of each module of image generation control system, and this method can have computing equipment such as mobile phone, panel computer, desktop Computers, notebooks and other devices that contain cameras, specifically include the following steps:
  • Step S101 the ISP control module determines corresponding first control information according to the image generated by the image sensor and the illumination adjustment strategy.
  • the illumination adjustment strategy includes the current overall light transmission rate of the ISP control module, and different illumination adjustment strategies correspond to different settings of the light transmission rate.
  • the light transmission rate is used to represent the degree of light passing through. For LCD liquid crystal devices, it represents the degree of transparency to light. In the process of image generation, light passes through the camera lens and the LCD liquid crystal device controlled by the first control information and then shines on the image. Sensors to generate image signals, and then generate images after ISP image signal processing.
  • the ISP control module determines corresponding first control information according to the image generated by the image sensor and the light transmission rate, and the first control information is used to control the LCD liquid crystal device to adjust the light transmission rate.
  • the adjustment of the light transmission rate includes the control of the overall light transmission rate of the image, and also includes the local adjustment of the attention area of the image.
  • the corresponding LCD liquid crystal device is a single-controlled LCD liquid crystal panel, it can realize the adjustment of the overall brightness and darkness of the generated image; In addition to adjusting the brightness of the overall image, it is also possible to adjust the brightness and/or color of an image in a specific area.
  • the first control information includes the transparency of each crystal element
  • the LCD liquid crystal light control module applies a corresponding adjustment voltage to the LCD liquid crystal device according to the first control information to change the angle of the liquid crystal crystal in the LCD liquid crystal device to realize the adjustment Light transmission rate control.
  • FIG. 2 is a schematic schematic diagram of an exemplary liquid crystal screen.
  • the LCD liquid crystal panel takes TN-type liquid crystal as an example.
  • the TN-type liquid crystal is connected in series along the direction of the long axis, and the long axes are arranged parallel to each other.
  • the liquid crystal molecules When contacting the surface of the groove, the liquid crystal molecules will be arranged in the groove along the direction of the groove.
  • the arrangement of the liquid crystal molecules is: the upper surface molecules: along the a direction; the lower surface molecules: along the b direction; between the upper and lower surfaces Molecule: produces the effect of rotation.
  • FIG. 3 is an exemplary flipping effect diagram of liquid crystal molecules.
  • the liquid crystal is evenly distributed under the action of voltage, that is, when a voltage is applied between the upper and lower surfaces, the liquid crystal molecules will be arranged along the direction of the electric field, forming a phenomenon of vertical arrangement. At this time, the incident light is not affected by the liquid crystal molecules, and straightly shoots out of the lower surface.
  • FIG. 4 is a schematic diagram of an exemplary polarization characteristic of liquid crystal.
  • LCD liquid crystal panels have the characteristics of polarizers. As shown in Figure 4 (above), non-polarized light (ordinary light) is filtered into polarized light. When non-polarized light passes through the polarizer in the a direction, the light is filtered into a Parallel linear polarized light, the linear polarized light continues to advance, and the light passes through the second polarizer; as shown in Figure 4 (below), the linear polarized light continues to advance, and the light is completely blocked when passing through the second polarizer.
  • Fig. 4a is a schematic diagram of another exemplary liquid crystal screen.
  • Fig. 4b is a schematic diagram of another exemplary liquid crystal screen.
  • the biggest difference from that shown in FIG. 2 is that no polarizer is required, and the inner wall of the liquid crystal container is not provided with a groove-shaped surface.
  • the liquid crystal molecules contained in it are in a state of disordered arrangement, and the light cannot pass through the glass film, and the state seen at this time is white and non-transparent state.
  • the internal liquid crystal molecules are arranged in an orderly manner, and the light can pass through the glass film smoothly, and the state seen at this time is the transparent state.
  • the ISP control module determines the corresponding first control information method according to the image generated by the image sensor and the light passing rate includes: determining the corresponding overall light passing rate according to the set light adjustment strategy; according to the image generated by the image sensor Determine the light transmission rate of the image adjustment area and the corresponding pixel crystal unit; combine the overall image control information according to the overall light transmission rate and the light transmission rate of the pixel crystal unit in the image adjustment area, and send it to the LCD liquid crystal control The module controls the LCD liquid crystal device.
  • the communication module transmits data generated by the external system and the ISP control module, and the generated data includes illumination adjustment strategy information, generated image information, ISP control instructions, and externally specified external setting control information.
  • the ISP module determines corresponding first control information according to the illumination adjustment strategy and an image generated by the image sensor.
  • the ISP module determines that the external environment is brighter according to the image generated by the image sensor, and then combines the strategy of the automatic mode of the illumination adjustment strategy to generate the first control information for reducing the overall light, and put the first control
  • the information is sent to the LCD liquid crystal light control module, and the LCD liquid crystal light control module controls the LCD liquid crystal device to reduce the light passing rate according to the first control information, which can realize the adjustment of the overall brightness and darkness of the generated image, so that the light intensity received by the image sensor in a relatively constant state.
  • the ISP module determines corresponding first control information according to the illumination adjustment strategy and an image generated by the image sensor.
  • the ISP module determines that the external environment is dark according to the image generated by the image sensor, so combined with the strategy that the illumination adjustment strategy is an automatic mode, it generates the first control information that increases the overall light, and puts the first control
  • the information is sent to the LCD liquid crystal light control module, and the LCD liquid crystal light control module controls the LCD liquid crystal device to reduce the light passing rate according to the first control information, which can realize the adjustment of the overall brightness and darkness of the generated image, so that the light intensity received by the image sensor in a relatively constant state.
  • the ISP module determines corresponding first control information according to the illumination adjustment strategy and an image generated by the image sensor.
  • the ISP module generates the first control information of the corresponding overall light control value according to the received overall light intensity value of the external setting control information, and sends the first control information to the LCD liquid crystal light control module, and the LCD liquid crystal light control
  • the module controls the LCD liquid crystal device to reduce the light passing rate according to the first control information, which can realize the adjustment of the overall brightness and darkness of the generated image, so that the light intensity received by the image sensor is controlled by external settings.
  • a double-pass cut-off filter for visible light and near-infrared is used, that is, visible light with a wavelength of 400nm-700nm and near-infrared light with a wavelength of 800nm, 820nm, 850nm, 920nm and/or 940nm are allowed to pass through at the same time.
  • the transmission rate of the near-infrared spectrum is basically unchanged due to the reduction of the transmission rate of the visible light spectrum, which will cause a reddish imaging effect.
  • the ISP module will perform image color processing on the reddish image to ensure that the image Restoration effect.
  • a double-pass cut-off filter for visible light and near-infrared light is used.
  • the transmission rate manually set by the user is 0, the transmission rate of visible light is 0%, and the near-infrared light passes well, and the resulting Become a near-infrared image, thereby realizing the near-infrared light imaging function, and can be used as a static controllable device to replace the mechanical spectrum switching function of IR-CUT.
  • the determining the overall light passing rate, the image adjustment area, and the light passing rate of the corresponding pixel wafer according to the user setting instruction includes: when the lighting adjustment strategy of the ISP control module is an external setting mode, and according to The externally input external setting control information, the current illumination adjustment strategy and/or the image generated by the image sensor determine the first control information, and the first control information is information input to the LCD liquid crystal light control module; when the When the illumination adjustment strategy of the ISP control module is an automatic mode and the abnormal light source detection function is turned off, the ISP control module calculates the brightness of the overall image and determines the overall image light transmission rate according to the overall light transmission rate, thereby generating corresponding control information; When the illumination adjustment strategy of the ISP control module is the automatic mode and the abnormal light source detection function is turned on, the ISP control module calculates the brightness of the overall image and determines the light passing rate of the overall image according to the overall light passing rate, and simultaneously determines whether there is When the strong light appears, the light passing rate of the local area is adjusted according to
  • the determination of the first control information includes external setting input, and also includes automatic generation by the system.
  • automatic generation by the system it may be obtained by acquiring the intensity of external light, and determining the light passing rate of each crystal element of the LCD liquid crystal device according to the intensity of external light, so as to determine the first control information.
  • different external light intensities correspond to different light transmission rates of LCD liquid crystal devices.
  • the external light intensity may be acquired to determine the light passing rate of the corresponding LCD liquid crystal device; to determine the light transmission rate of the corresponding LCD liquid crystal device.
  • the corresponding attention area may be determined through image recognition, and the light passing rate of the attention area may be adjusted, which will be explained in detail in subsequent embodiments.
  • Step S102 the communication module transmits the first control information generated by the ISP control module to the LCD liquid crystal light control module.
  • Step S103 the LCD liquid crystal light control module controls the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device adjusts the light transmission rate.
  • the liquid crystal light control module is used to realize the control of the LCD liquid crystal device, such as controlling the overall power-on voltage of the LCD liquid crystal panel; or controlling the current of the corresponding pixel elements of the LCD multi-crystalline element panel.
  • the LCD multi-chip panel includes at least one pixel control unit, as shown in Figure 5, which is a schematic diagram of an LCD multi-chip panel provided by the present invention, wherein each grid can be individually brightened and darkened by a control signal Light transmission control, which can reduce the brightness of the high-brightness squares in the vicinity of the shooting target.
  • the ISP control module performs data communication with the LCD liquid crystal light control module through a communication module, and the image sensor and the ISP control module perform data communication through an image communication interface.
  • Step S104 the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control module based on the generated image and light transmission rate Second control information corresponding to the overall image is generated.
  • the ISP control module may perform the above-mentioned processing on each generated image frame, or may perform processing in a frame-by-frame processing manner.
  • the image generation process is a cyclic process. Taking automatic control as an example, the image signal processor and the control device analyze the frame image to determine the corresponding overall light transmission rate and/or area adjustment information after receiving and generating the current image. After generating corresponding first control information based on the light transmission rate and/or area adjustment information, controlling the LCD liquid crystal device and correspondingly adjusting the overall light and shade and regional light and shade colors of the current shooting content to generate an adjusted image For the adjusted image, corresponding second control information can be regenerated to perform image adjustment in a loop again.
  • it further includes a step of generating external setting control information and returning it to the external system, so that the external system can perform corresponding processing.
  • the ISP control module includes an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor;
  • the ISP control module is connected to the communication module and the image sensor respectively, and the communication module is connected to the external The system is connected, and the LCD liquid crystal light control module is connected to the ISP control module; wherein, the current illumination adjustment strategy is determined; the ISP control module determines the corresponding first control information according to the illumination adjustment strategy and the image generated by the image sensor
  • the first control information generated by the ISP control module is transmitted to the LCD liquid crystal light control module; the LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that all The LCD liquid crystal device adjusts the light transmission rate;
  • the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control
  • the module generates second control information corresponding to the overall image based on the illumination adjustment policy and the
  • the illumination adjustment strategy of the ISP control module includes an automatic mode and an external setting mode; the ISP control module performs data communication with an external system through a communication module, including: the external system specifies the specified mode through the communication module Describe the illumination adjustment strategy of the ISP control module.
  • the working process of the external setting mode includes: the external system outputs external setting control information to the ISP control module through the communication module, and the ISP control module adjusts The image generated by the policy and/or the image sensor determines the first control information, and transmits the first control information to the LCD liquid crystal light control module; the LCD liquid crystal light control module is used to control according to the external settings The information controls the LCD liquid crystal device, so that the LCD liquid crystal device adjusts the light transmission rate.
  • the ISP control module is specifically used to: set the layout of the LCD crystal cells of the LCD liquid crystal device, such as setting the multi-chip cell The number of wafers in the board in the lateral direction and the vertical direction is set.
  • Fig. 6 is a flowchart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention, and provides a specific method for controlling the LCD liquid crystal device to adjust the light transmission rate, wherein the LCD
  • the liquid crystal driving module is described by taking a voltage output control module as an example, and it may also be a current output control module for example.
  • the specific process is as follows:
  • Step S201 the ISP control module determines corresponding first control information according to the image generated by the image sensor and the light transmission rate.
  • Step S202 outputting the first control information to the LCD liquid crystal light control module.
  • the image signal processor and the control device further include an LCD liquid crystal light control module including an LCD liquid crystal drive module, the LCD liquid crystal drive module is connected to the LCD liquid crystal device, and the first control information light transmission rate information, the LCD liquid crystal light control module controls the LCD liquid crystal drive to output a corresponding voltage to control the LCD liquid crystal device according to the first control information, so as to control the LCD liquid crystal device to adjust the light transmission rate.
  • an LCD liquid crystal light control module including an LCD liquid crystal drive module, the LCD liquid crystal drive module is connected to the LCD liquid crystal device, and the first control information light transmission rate information, the LCD liquid crystal light control module controls the LCD liquid crystal drive to output a corresponding voltage to control the LCD liquid crystal device according to the first control information, so as to control the LCD liquid crystal device to adjust the light transmission rate.
  • FIG. 7 is a schematic diagram of an exemplary transmittance voltage contrast curve.
  • the abscissa is the voltage value
  • the ordinate is the corresponding light transmission rate.
  • Step S203 the LCD liquid crystal light control module controls the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device adjusts the light transmission rate.
  • Step S204 the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control module based on the generated image and light transmission rate Second control information corresponding to the overall image is generated.
  • the image signal processor and the control device include an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor; wherein, the current illumination adjustment strategy is determined; the ISP control module Determine the corresponding first control information according to the illumination adjustment strategy and the image generated by the image sensor; the communication module is used to transmit the first control information generated by the ISP control module to the LCD liquid crystal light control module; The LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate; Light is sensed, and a corresponding electrical signal is output to the ISP control module to generate an image and used by the ISP control module to generate second control information of a corresponding overall image based on the illumination adjustment strategy and the generated image.
  • the communication module transmits the liquid crystal voltage control signal to the voltage output control module to output the corresponding voltage to the LCD liquid crystal light control module, so as to realize dynamic image brightness adjustment and further optimize the image generation method .
  • FIG. 8 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention, showing a method for controlling the LCD multi-crystal panel through an ISP control module to adjust the generated image. As shown in Figure 8, the specific process is as follows:
  • Step S301 Determine the strong light area, and determine corresponding first control information according to the illumination adjustment strategy and the strong light area.
  • Step S302 sending the first control information to the LCD liquid crystal light control module.
  • Step S303 controlling the LCD multi-chip panel according to the first control information, so that each crystal cell in the LCD multi-chip panel adjusts the light transmission rate accordingly.
  • FIG. 9 is a schematic diagram including strong light provided by an embodiment of the present invention.
  • the strong light display of the strong light area can be reduced.
  • FIG. 10 is a schematic diagram of adding mask information to an image provided by an embodiment of the present invention. As shown in FIG. 10 , the strong light area is blocked by controlling the light transmission rate information.
  • FIG. 11 is a picture output by an LCD liquid crystal device provided by an embodiment of the present invention. As shown in FIG. 11 , the LCD liquid crystal module controls to block the strong light part, and outputs a picture with uniform brightness. Specifically, the adjustment logic is shown in FIG. 12 , and FIG.
  • FIG. 12 is a schematic diagram of adjusting a multi-chip provided by an embodiment of the present invention. As shown in FIG. 12 , for example, 100 means that the control light passing rate is 100%, 90 means controlling the light passing rate of 90%, 40 means controlling the light passing rate of 40%, and so on.
  • the illumination adjustment strategy is an external setting mode and an external setting control signal input from an external source is received.
  • the external setting control information input by the external is: (length) 24, (height) 14, (overall light passing rate) 1.0, (starting position) [0,0], (array size) 336, (ray pass rate array) [255,...255,230,179,179,230,255,...255,154,102,102,205,255,...255,154,102,102,102,205,255,...255,230,205,205,230,255,...255].
  • Figure 10 is the light transmission rate information that adds the first control information to the image provided by the embodiment of the present invention schematic diagram.
  • Figure 11 is a picture based on the output of the LCD liquid crystal device provided by the present invention. As shown in Figure 11, the LCD liquid crystal module controls the strong light part and outputs a picture with uniform brightness, realizing the function of automatic adaptation to abnormal environments.
  • the illumination adjustment strategy is an external setting mode and an external setting control signal input from an external source is received.
  • the external setting control information input externally is: (total length) 24, (total height) 14, (overall light passing rate) 1.0, (number of arrays) 1, [(length) 4, (high) 4, (start position) [7,6], (array size) 16, (ray pass rate array) [230,179,179,230,154,102,102,205,154,102,102,102,205,230,205,205,230]].
  • Figure 10 is the light transmission rate information that adds the first control information to the image provided by the embodiment of the present invention schematic diagram.
  • Figure 11 is a picture based on the output of the LCD liquid crystal device provided by the present invention. As shown in Figure 11, the LCD liquid crystal module controls the strong light part, outputs a picture with uniform brightness, and realizes the function of manual control adaptation for abnormal environments .
  • the LCD liquid crystal device is an LCD multi-crystal unit
  • the specific adjustment method includes: determining the corresponding illumination adjustment strategy in the current image generation scene, if the illumination adjustment strategy is automatic mode and the strong light adjustment function is turned on, the corresponding Determine the strong light area in the current shooting picture, determine the corresponding first control information according to the illumination adjustment strategy and the strong light area, and control the LCD multi-element panel to reduce the strong light area through the first control information.
  • the light passing rate of the light area enables the adjusted light to be sensed by the image sensor to generate an image.
  • the method of determining the strong light area includes: displaying a preview screen of a pair of captured images on the device interface, and determining it as a strong light area according to the detected click position of the user;
  • the image algorithm of the current shooting image is recognized to calculate the corresponding strong light area.
  • the average brightness of the image screen in each area can be determined by means of partial photometry or partitioned photometry. When a certain area When the average brightness value is significantly greater than other areas, this area is determined as a strong light area.
  • the strong light area corresponding to the LCD multi-chip panel the light passing rate in this area is reduced, and finally an image with uniform brightness that does not include the strong light area is formed.
  • the LCD multi-element control board realizes the effect of occlusion through the control of the light passing rate of the element, produces a color difference that is obviously different from the surrounding area, and produces unsmooth image effects such as grids and sawtooth. Therefore, further Specifically, perform targeted image processing such as white balance and color correction on the occluded area to reduce the color difference between the image and the surrounding area, eliminate aliasing, and make the image more natural.
  • Step S304 the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control module based on the generated image and light transmission rate Second control information corresponding to the overall image is generated.
  • Step S305 generating external setting control information and returning it to the external system.
  • the image signal processor and the control device include an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor; wherein, the current illumination adjustment strategy is determined; the ISP control module Determine the corresponding first control information according to the illumination adjustment strategy and the image generated by the image sensor; the communication module is used to transmit the first control information generated by the ISP control module to the LCD liquid crystal light control module; The LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate; Light is sensed, and a corresponding electrical signal is output to the ISP control module to generate an image and used by the ISP control module to generate second control information of a corresponding overall image based on the illumination adjustment strategy and the generated image.
  • This solution expands the function of image generation, which can efficiently realize the dynamic adjustment of the generated image and optimize the user experience.
  • the adjustment of the image area is realized through the LCD multi-chip panel
  • FIG. 13 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention, showing a method for controlling the LCD multi-crystal panel through an ISP control module to adjust the generated image. As shown in Figure 13, the specific process is as follows:
  • Step S401 the ISP control module determines the illumination adjustment strategy.
  • Step S402. Determine the attention area, and determine corresponding first control information according to the illumination adjustment strategy and the attention area.
  • Step S403 sending the first control information to the LCD liquid crystal light control module.
  • Step S404 controlling the LCD multi-chip panel according to the first control information, so that each crystal cell in the LCD multi-chip panel adjusts the light transmission rate accordingly.
  • Step S405 the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control module based on the generated image and light transmission rate Second control information corresponding to the overall image is generated.
  • the LCD liquid crystal device is an LCD multi-crystal unit.
  • the specific adjustment method includes: determining the corresponding illumination adjustment strategy in the current image generation scene. For an area of interest in the currently photographed picture, determine corresponding first control information according to the illumination adjustment strategy and the area of interest, and control the LCD multi-chip panel to reduce the intensity of the strong light area through the first control information The light passing rate makes the adjusted light pass through the induction of the image sensor to generate an image.
  • the adjustment method may also be: determine the corresponding illumination adjustment strategy in the current image generation scene, set the external mode and enable the function of the area of interest, and determine the shooting target in the current shooting picture.
  • a preview screen of a pair of captured images is displayed on the device interface, and it is determined as an attention area according to the detected click position of the user.
  • the adjustment method may also be: determine the corresponding illumination adjustment strategy in the current image generation scene, automatically mode and turn on the function of the area of interest, and determine the shooting target in the current shooting picture.
  • the built-in face detection algorithm of the ISP detects that there is a human face in the generated image, and then determines the position and size of the human face as the attention area.
  • ISP’s built-in algorithm can be one or more of face detection, face recognition, car detection, license plate detection, car recognition, license plate equipment, road recognition, pedestrian recognition, behavior recognition, motion detection, dynamic tracking, etc.
  • the shooting area after determining the shooting area of interest, determine the light intensity of the area of interest and outside the area of interest, and when the light intensity of the area of interest is lower than the light intensity outside the area of interest and reaches a preset threshold, the shooting area In a backlit environment, then determine the position, shape, size and light passing rate of the area of interest and the area outside the area of interest according to the light intensity of the area of interest and the light intensity outside the area of interest.
  • the light passing rate of the corresponding crystal element is controlled through the LCD multi-element panel, so that the adjusted light passes through the induction of the image sensor to generate a clear image without backlight. image.
  • the LCD multi-element control board realizes the effect of occlusion through the control of the light passing rate of the element, produces a color difference that is obviously different from the surrounding area, and produces unsmooth image effects such as grids and sawtooth. Therefore, further Specifically, perform targeted image processing such as white balance and color correction on the occluded area to reduce the color difference between the image and the surrounding area, eliminate aliasing, and make the image more natural.
  • Step S406 generating external setting control information and returning it to the external system.
  • the image signal processor and the control device include an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device and an image sensor; determine the current illumination adjustment strategy; The illumination adjustment strategy and the image generated by the image sensor determine the corresponding first control information; the communication module is used to transmit the first control information generated by the ISP control module to the LCD liquid crystal light control module; the LCD liquid crystal The light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate; the image sensor can adjust the light of the LCD liquid crystal device Sensing, and outputting a corresponding electrical signal to the ISP control module to generate an image and used by the ISP control module to generate second control information of a corresponding overall image based on the illumination adjustment strategy and the generated image.
  • the communication module transmits the liquid crystal voltage control signal to the voltage output control module to output the corresponding voltage to the LCD liquid crystal light control module to achieve dynamic image brightness adjustment, further optimizing the image generation method . And realize the adaptability to the area of concern and the dynamic environment.
  • FIG. 14 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention, and shows a specific processing method of an ISP control module. As shown in Figure 14, the specific process is as follows:
  • Step S501 the ISP control module determines the current illumination adjustment strategy.
  • Step S502 Determine the corresponding overall light transmission rate according to the set light adjustment strategy, determine the image adjustment area and the light transmission rate of the corresponding pixel wafer according to the received image attention area, and adjust according to the overall light transmission rate and the image The light transmission rates of the pixel elements in the area are combined into the overall image control information.
  • determining the image adjustment according to the set light adjustment strategy includes adjusting the overall pass rate of light, that is, changing the brightness of the image as a whole, and also includes the process of adjusting the brightness and color of the image area in a designated area.
  • corresponding first control information may be generated according to one or more adjustment manners.
  • the ISP control module can receive the external setting control information sent by the ARM main chip, the external control information includes the image attention area, and determine the image adjustment area and the light passing rate of the corresponding pixel wafer according to the image attention area . Finally, through the ISP control module, the overall light transmission rate and the image adjustment area are used to determine the first control information, and the first control information is sent to the LCD liquid crystal light control module to control the LCD liquid crystal device to obtain an image after integrated control.
  • Step S503 transmitting the first control information to the LCD liquid crystal light control module.
  • Step S504 controlling the LCD multi-chip panel according to the first control information, so that each crystal cell in the LCD multi-chip panel adjusts the light transmission rate accordingly.
  • Step S505 the image sensor senses the adjusted light of the LCD multi-chip panel, and outputs a corresponding electrical signal to the ISP control module to generate an image and use it for the ISP control module based on the generated image and light
  • the pass rate generates the second control information corresponding to the overall image.
  • Step S506 generating external setting control information and returning it to the external system.
  • the image signal processor and the control device include an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor; wherein, the current illumination adjustment strategy is determined; the ISP control module The illumination adjustment strategy and the corresponding first control information are determined according to the image generated by the image sensor; the communication module is used to transmit the first control information generated by the ISP control module to the LCD liquid crystal light control module; the The LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate; Light is sensed, and a corresponding electrical signal is output to the ISP control module to generate an image and used by the ISP control module to generate second control information of a corresponding overall image based on the illumination adjustment strategy and the generated image.
  • This solution expands the function of image generation, which can efficiently realize the dynamic adjustment of the generated image and optimize the user experience.
  • the overall light transmission rate of the image and the adjustment of the area's light and dark colors have been realized, which has significantly improved the image generation effect, and at the same time, the image adjustment flexibility is greater and the adjustment efficiency is also higher.
  • FIG. 15 is a flow chart of another image generation method based on an LCD liquid crystal device provided by an embodiment of the present invention, and provides a specific processing method of an ISP control module. As shown in Figure 15, the specific process is as follows:
  • Step S601 the ISP control module determines the current illumination adjustment strategy.
  • Step S602 determining a corresponding focus control mode according to the set light adjustment strategy.
  • Step S603 transmitting the first control information to the focusing control module.
  • Step S604 the focusing control module controls the focal length of the focusing device according to the first control information.
  • the focus mode determined according to the set light adjustment strategy is the auto focus mode or the external setting focus mode
  • the ISP control module determines the corresponding first control information according to the light adjustment strategy and the image generated by the image sensor.
  • the scene is a license plate recognition camera at the entrance of an underground parking garage, and at this time, the headlights of the car are on because it is night.
  • a current illumination adjustment strategy is determined, and the ISP control module determines corresponding first control information according to the illumination adjustment strategy and an image generated by an image sensor.
  • the set light adjustment strategy is automatic mode, auto focus mode, and external setting focus area
  • the ISP control module determines the corresponding first control information according to the light adjustment strategy and the image generated by the image sensor.
  • the external system detects the position and size of the license plate through the license plate detection algorithm and takes it as the focus area.
  • the ISP module receives the external setting control information transmitted from the external system through the transmission module and determines the focus area.
  • the set light adjustment strategy is automatic mode, auto focus mode, automatic focus area and the built-in license plate detection artificial intelligence algorithm is enabled, and the light adjustment strategy of the ISP control module is determined according to the image generated by the image sensor.
  • the ISP control module detects the position and size of the license plate through the built-in license plate detection artificial intelligence algorithm and takes it as the focus area.
  • determining the image adjustment according to the set light adjustment strategy includes the adjustment of the overall light pass rate, and also includes the process of abnormal light source adjustment, designated attention area control, focal length control and overall brightness adjustment.
  • corresponding first control information may be generated according to one or more adjustment manners.
  • the ISP control module detects the abnormal light source of strong light emitted by the headlights of the car according to the image generated by the image sensor, and generates light passing rate information for reducing the strong light source for the abnormal light source; generates information for the area of interest based on the autofocus mode and the determined area of interest Focus length control information; according to the determined area of interest, a strong light area around the area of interest is found, and light transmission rate information for the area of interest is generated.
  • First control information is generated by using the above-mentioned light transmission rate information for the abnormal light source, focus control information for the attention area, and light transmission rate information for the attention area.
  • the light transmission rate of each crystal element of the LCD liquid crystal device is controlled by the LCD liquid crystal light control module according to the first control information
  • the focal length module is controlled by the focal length control module according to the first control information.
  • the light transmission rate information for abnormal light sources can be controlled by the LCD liquid crystal module to reduce the image of the license plate imaged by strong light, and the focus control information for the area of interest can make the camera capture the license plate image more clearly.
  • the light transmission rate information can process the strong light around the license plate and correct the light transmission rate for abnormal light sources, so that the clearest license plate image can be captured under the condition of blocking the strong light. It can make the camera adapt to more complex lighting environment and increase the environmental adaptability of the camera.
  • the ISP control module the overall light transmission rate and the image adjustment area are used to determine the first control information, and the first control information is sent to the LCD liquid crystal light control module to control the LCD liquid crystal device to obtain an image after integrated control.
  • the LCD multi-element control board realizes the effect of occlusion through the control of the light passing rate of the element, produces a color difference that is obviously different from the surrounding area, and produces unsmooth image effects such as grids and sawtooth. Therefore, further Specifically, perform targeted image processing such as white balance and color correction on the occluded area to reduce the color difference between the image and the surrounding area, eliminate aliasing, and make the image more natural.
  • Step S605 the image sensor senses the light adjusted by the focusing device, and outputs a corresponding electrical signal to the ISP control module to generate an image, which is used by the ISP control module to generate an image based on the generated image and light transmission rate The second control information of the corresponding overall image.
  • Step S606 generating external setting control information and returning it to the external system.
  • the ISP control module generates external setting control information and returns it to the external system, and the external system performs further processing according to it.
  • the external system can return the focal length control information to estimate the distance between the car and the camera according to the external setting control information, and can calculate the position and speed of the car and determine the best time for license plate recognition.
  • the image signal processor and the control device include an ISP control module, a communication module, an LCD liquid crystal light control module, an LCD liquid crystal device, and an image sensor; wherein, the current illumination adjustment strategy is determined; the ISP control module The illumination adjustment strategy and the corresponding first control information are determined according to the image generated by the image sensor; the communication module is used to transmit the first control information generated by the ISP control module to the LCD liquid crystal light control module; the The LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate; Light is sensed, and a corresponding electrical signal is output to the ISP control module to generate an image and used by the ISP control module to generate second control information of a corresponding overall image based on the illumination adjustment strategy and the generated image.
  • This solution expands the function of image generation, which can efficiently realize the dynamic adjustment of the generated image and optimize the user experience.
  • the overall light transmission rate of the image and the adjustment of the area's light and dark colors have been realized, which has significantly improved the image generation effect, and at the same time, the image adjustment flexibility is greater and the adjustment efficiency is also higher.
  • FIG. 16 is a structural block diagram of an image generating device based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • the device specifically includes: an ISP control module 101, a communication module 102, an LCD liquid crystal light control module 103, an LCD liquid crystal device 104, and an image sensor 105; the ISP control module 101 communicates with the communication module 102 and the The image sensor 105 is connected, the communication module 102 is connected to an external system, and the LCD liquid crystal light control module is connected to the ISP control module; further, the device also includes: a focal length control module 106 and a focusing device 107; The ISP control module 101 is also connected to the focus control module 106, and the focus control module 106 is connected to the focusing device 107;
  • the ISP control module is used to determine the corresponding first control information according to the image generated by the image sensor and the illumination adjustment strategy;
  • the first control information generated by the ISP control module is transmitted to the LCD liquid crystal light control module;
  • the LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate;
  • the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image for the ISP control module to generate based on the generated image and light adjustment strategy The second control information of the corresponding overall image.
  • the device includes: a focal length control module and a focusing device; the ISP control module is also connected with the focal length control module, and the focal length The control module is connected to the focusing device; wherein, the current illumination adjustment strategy is determined; the ISP control module determines corresponding first control information according to the illumination adjustment strategy and the image generated by the image sensor; the first control information generated by the ISP control module A control information is transmitted to the LCD liquid crystal light control module; the LCD liquid crystal light control module is used to control the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can control the light transmission rate adjustment: the image sensor senses the adjusted light of the LCD liquid crystal device,
  • Fig. 17 is a schematic structural diagram of an image generating device based on an LCD liquid crystal device provided by an embodiment of the present invention.
  • the device includes a processor 201, a memory 202, an input device 203, and an output device 204;
  • the number of processors 201 can be one or more, and one processor 201 is taken as an example in FIG. Take connection via bus as an example.
  • the memory 202 as a computer-readable storage medium, can be used to store software programs, computer-executable programs and modules, such as program instructions/modules corresponding to the image generation method based on the LCD liquid crystal device in the embodiment of the present invention.
  • the processor 201 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 202, that is, realizes the above-mentioned image generation method based on the LCD liquid crystal device.
  • the input device 203 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the device.
  • the output device 204 may include a display device such as a display screen.
  • An embodiment of the present invention also provides a storage medium containing computer-executable instructions, the computer-executable instructions are used to execute an image generation method based on an LCD liquid crystal device when executed by a computer processor, including a focusing lens and the The LCD liquid crystal device associated with the focus lens, the LCD liquid crystal device is arranged between the focus lens and the image sensor, or the focus lens is arranged between the LCD liquid crystal device and the image sensor, the method includes:
  • the ISP control module determines the corresponding first control information according to the image generated by the image sensor and the illumination adjustment strategy, and transmits the generated first control information to the LCD liquid crystal light control module;
  • the LCD liquid crystal light control module controls the LCD liquid crystal device according to the first control information, so that the LCD liquid crystal device can adjust the light transmission rate;
  • the image sensor senses the adjusted light of the LCD liquid crystal device, and outputs a corresponding electrical signal to the ISP control module to generate an image for the ISP control module to generate based on the generated image and light adjustment strategy The second control information of the corresponding overall image.
  • the ISP control module is also connected to the focus control module, so as to control the focal length of the focus device according to the focus control information.
  • the embodiment of the present invention can be implemented by means of software and necessary general-purpose hardware, of course, it can also be implemented by hardware, but in many cases the former is better implementation.
  • the essence of the technical solution of the embodiment of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (FLASH), hard disk or optical disc, etc., including several instructions to make a computer device (which can be personal computer, service, or network equipment, etc.) execute the methods described in the various embodiments of the embodiments of the present invention.
  • the units and modules included are only divided according to functional logic, but are not limited to the above-mentioned divisions, as long as the corresponding functions can be realized. Yes; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present invention.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un appareil et un procédé de commande de génération d'image basés sur un appareil à cristaux liquides LCD. L'appareil comprend : un module de commande ISP (101), un module de communication (102), un module de commande de lumière à cristaux liquides LCD (103), un appareil à cristaux liquides LCD (104) et un capteur d'image (105). Le module de commande ISP (101) est utilisé pour déterminer des premières informations de commande correspondantes selon une image générée par le capteur d'image (105) et le débit de passage de lumière ; les premières informations de commande générées par le module de commande ISP (101) sont transmises au module de commande de lumière à cristaux liquides LCD (103) ; le module de commande de lumière à cristaux liquides LCD (103) est utilisé pour commander l'appareil à cristaux liquides LCD (104) en fonction des premières informations de commande ; le capteur d'image (105) détecte la lumière réglée par l'appareil à cristaux liquides LCD (104) et délivre un signal électrique correspondant au module de commande ISP (101). La présente solution étend la fonction de génération d'image, de telle sorte qu'une image générée puisse être réglée dynamiquement de manière efficace, ce qui permet d'optimiser l'expérience de l'utilisateur.
PCT/CN2022/096774 2021-06-04 2022-06-02 Appareil et procédé de commande de génération d'image basés sur un appareil à cristaux liquides lcd WO2022253300A1 (fr)

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