WO2021017476A1 - 基于辅助工具的对焦方法、辅助工具及投影系统 - Google Patents
基于辅助工具的对焦方法、辅助工具及投影系统 Download PDFInfo
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- WO2021017476A1 WO2021017476A1 PCT/CN2020/079115 CN2020079115W WO2021017476A1 WO 2021017476 A1 WO2021017476 A1 WO 2021017476A1 CN 2020079115 W CN2020079115 W CN 2020079115W WO 2021017476 A1 WO2021017476 A1 WO 2021017476A1
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- projector
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- focusing
- auxiliary tool
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
Definitions
- the invention relates to the field of projection focusing, in particular to a focusing method based on an auxiliary tool, an auxiliary tool and a projection system.
- the side projection method can be used.
- a mirror can be installed to adjust the telephoto camera to an ultra-short-focus camera. Is it a side-projector or an ultra-short focal length camera? It is impossible to perform a good autofocus only with the camera of the projector itself, because the camera of the projector itself cannot be aligned with the projection screen when it is side-projected, and the ultra-short focal length camera The camera cannot capture the entire projection screen. Therefore, in similar scenarios such as side-projection and ultra-short-focus cameras, the camera with the projector itself cannot accurately capture the current projection screen, which will directly cause the autofocus function to be unavailable or The focus is not good.
- one aspect of the present application is to provide an auxiliary tool-based focusing method from the auxiliary tool side.
- the focusing method based on an auxiliary tool is applied to an auxiliary tool provided with a shooting module, the auxiliary tool is independent of the projector, and the method includes:
- the standard image is stored in the auxiliary tool, the processing of the projection image to obtain the definition of the projection image, and determining whether the definition of the projection image meets the requirements includes:
- the focusing signal includes rotation direction information of the projector focusing motor and information of the number of rotation steps of the projector focusing motor.
- the method further includes:
- the rotation direction information of the projector focus motor in the same direction focus signal is the same as the rotation direction information of the projector focus motor in the previous focus signal, and the projector focus motor rotation in the reverse focus signal
- the direction information is opposite to the rotation direction information of the projector focusing motor in the focusing signal sent last time.
- Another aspect of the present application is to provide an auxiliary tool-based focusing method from the projector side, the method is applied to a projector, the projector is independent of the auxiliary tool, and the method includes:
- auxiliary tool which is independent of the projector and communicatively connected to the projector, the auxiliary tool includes:
- Focus command receiving module used to receive focus commands and send shooting signals to the shooting module
- Shooting module used to receive the shooting signal sent by the focus command receiving module and shoot the projected image, and then send the captured projected image to the image processing module;
- Image processing judgment module used to process the received projection image to obtain the definition of the projected image, determine whether the definition of the projected image meets the requirements, if not, send the focusing signal to the communication module, otherwise the focus is over;
- Communication module used to receive the focus signal sent by the image processing module and send the focus signal to the projector.
- the auxiliary tool is a mobile terminal with a CPU, the CPU includes the image processing judgment module, and the auxiliary tool further includes:
- Storage module used to store standard images
- the image processing module includes:
- Comparative analysis unit used to compare and analyze the received projection image according to the standard image to obtain the definition of the projection image
- the first judging unit judging whether the sharpness of the projected image is less than the preset value, if so, the sharpness of the projected image does not meet the requirements, and sending a focusing signal to the communication module, if not, the current focusing ends.
- the focusing signal includes rotation direction information of the projector focusing motor and information of the number of rotation steps of the projector focusing motor.
- auxiliary tool further includes:
- Focusing completion signal receiving unit used to receive the adjustment completion signal sent by the projector through the communication module, and then send the shooting signal to the shooting module;
- the image processing module further includes:
- Second judging unit used to judge whether the sharpness of the projected image after focusing is better than that of the previous frame of projected image, if so, send the same direction focusing signal to the communication module, otherwise send the reverse focusing signal to Communication module
- the rotation direction information of the projector focus motor in the same direction focus signal is the same as the rotation direction information of the projector focus motor in the previous focus signal, and the projector focus motor rotation in the reverse focus signal
- the direction information is opposite to the rotation direction information of the projector focusing motor in the focusing signal sent last time.
- Another aspect of the present application is to provide a projection system including a projector and the aforementioned auxiliary tools.
- the auxiliary tool-based focusing method provided by the present application can ensure that the projection system is not restricted by the structure or use scene of the projector itself when focusing by adding an auxiliary tool independent of the projector, thereby realizing efficient autofocus.
- Fig. 1 is a flow chart showing a focusing method based on an auxiliary tool according to an exemplary embodiment.
- Fig. 2 is a flowchart showing another method for focusing based on an auxiliary tool according to another exemplary embodiment.
- Fig. 3 is a block diagram showing the structure of an auxiliary tool according to an exemplary embodiment.
- Fig. 4 is a block diagram showing the structure of a projection system according to an exemplary embodiment.
- this embodiment provides an auxiliary tool-based focusing method from the auxiliary tool side.
- the method is applied to an auxiliary tool provided with a photographing module.
- the auxiliary tool is independent of a projector, and the method includes:
- S2 Start the shooting module according to the focus command and shoot the projected image
- S3 Process the projected image to obtain the sharpness of the projected image, determine whether the sharpness of the projected image meets the requirements, if it does not meet the requirements, proceed to the next step, otherwise this focusing will end;
- the auxiliary tool in this embodiment can be a mobile phone with shooting functions and image processing and analysis functions, or other devices with shooting functions and image processing and analysis functions, such as cameras, tablets, and cameras with shooting functions. Watches, etc.
- the picture processing process in this embodiment is carried out in the auxiliary tool.
- the reason for this design is that after the auxiliary tool shoots the projected image, if the projected image is directly transmitted to the projector, because The content of the projected image is too large.
- the auxiliary tool needs to compress and encrypt the projected image first, and the transmission time is also long. After the projector receives the projected image, it needs to perform decompression and decryption, which not only wastes time, but also takes up resources. , The focusing efficiency is low.
- This embodiment directly analyzes the projected image taken back in the auxiliary tool and determines whether the sharpness of the projected image meets the requirements. If the sharpness of the projected image meets the requirements, no action is required by the projector, or You only need to inform the projector that the current projection image definition meets the requirements. If the projection image does not meet the requirements, the auxiliary tool only needs to send the focusing signal to the projector (the transmission time of the focusing signal is much lower In the transmission time of the projected image), the projector drives the focusing motor to adjust the focus according to the focusing signal. The whole process does not increase the operating burden of the projector, and compared with the projector, the auxiliary tools are superior in processing speed and processing capacity. For projectors, such a division of labor and cooperation can greatly improve the focusing efficiency and focusing effect of the projection system. It should also be noted that the image processing method in step S3 of this embodiment can be implemented by conventional technical means in the art.
- an APP with focus function can be installed on the auxiliary tool in this embodiment, and the APP can respond to the user's focus trigger command (equivalent to receiving the focus command in S1), or directly receive the focus command sent by the projector, APP After receiving the focus command, the shooting module (such as the camera) is controlled to turn on to shoot the projected image.
- the projector and the auxiliary tool can be connected in a short-distance wireless manner, such as Bluetooth, ultra-wideband, ZigBee, and Wifi.
- the standard image is stored in the auxiliary tool, and the processing of the projection image to obtain the definition of the projection image, and determining whether the definition of the projection image meets the requirements includes:
- S32 Determine whether the sharpness of the projected image is less than a preset value, and if it is smaller, the sharpness of the projected image does not meet the requirements.
- the standard image can be a series of images with different definitions.
- This embodiment uses conventional technical means in the field to compare and analyze the projected image and the standard image to obtain the definition of the projected image. If the definition is less than the preset Value, the clarity of the projected image does not meet the requirements.
- the focus signal in this embodiment may include information about the rotation direction of the focus motor of the projector and information about the number of rotation steps of the focus motor of the projector.
- the rotation direction information of the projector focusing motor includes the forward direction and the reverse direction.
- the number of rotation steps of the projector focusing motor can be selected by default or set according to the actual hard work.
- the focusing signal is (positive direction). , 3 steps), then, after the projector receives the focusing signal, it drives the focusing motor to rotate 3 steps in the positive direction.
- the clockwise direction is positive or the counterclockwise direction is positive, this can be agreed in advance.
- the method provided in this embodiment further includes:
- S8 Determine whether the sharpness of the projected image after focusing is better than that of the previous frame of projected image, if so, send the same-direction focusing signal to the projector, otherwise send the reverse focusing signal to the projector;
- the rotation direction information of the projector focus motor in the same direction focus signal is the same as the rotation direction information of the projector focus motor in the previous focus signal, and the projector focus motor rotation in the reverse focus signal
- the direction information is opposite to the rotation direction information of the projector focusing motor in the focusing signal sent last time.
- step S4 when the sharpness of the projected image captured by the auxiliary tool for the first time does not meet the requirements, the auxiliary tool does not know whether the focus motor of the projector should rotate in the forward or reverse direction. At this time, you can only try to send a focusing signal to the projector. Assuming that the focusing signal is (positive direction, step a), after the projector performs the first focusing according to the received focusing signal, the projected image is very It may still not meet the definition requirements.
- an auxiliary tool is needed to shoot the projected image after the projector is focused for clarity verification, that is, steps S5 to S7 need to be performed, if the projected image after the projector is focused is consistent If required, the focus is over and the shooting module is closed. If the sharpness of the projected image after the projector is adjusted still does not meet the requirements, proceed to step S8 and step S9.
- step S8 if the projector is adjusted for the projected projection The sharpness of the image is improved compared with the sharpness of the previous frame of the projected image, you can send the same-direction focusing signal (positive direction, step b) to the projector, if the projected image after the projector has been adjusted for sharpness ratio To check the clarity of the previous frame of the projected image, you can send a reverse focus signal (reverse direction, step c) to the projector, where the values of a, b, and c are determined according to the actual situation.
- step S9 that is, return to step S5. It should also be noted that the same direction focusing signal and the reverse focusing signal are relative to the last focusing signal.
- the focus motor rotation direction information of the last focusing signal is the opposite direction
- the same direction focusing The focus motor rotation direction information of the signal is the reverse direction
- the focus motor rotation direction information of the reverse focus signal is the positive direction. If the focus motor rotation direction information of the previous focus signal is the positive direction, then the same direction is adjusted.
- the focus motor rotation direction information of the focus signal is the positive direction
- the focus motor rotation direction information of the reverse focus signal is the reverse direction.
- this embodiment provides an auxiliary tool-based focusing method from the projector side.
- the method is applied to a projector that is independent of the auxiliary tool, and the method includes:
- P1 Receive the focus signal sent by the auxiliary tool
- this embodiment also includes: sending a focus command to the auxiliary tool.
- the focusing signal includes information about the direction of rotation of the focusing motor of the projector and information about the number of steps of the focusing motor of the projector.
- the signal directly drives the focusing motor to adjust the focus, without image processing, the focusing efficiency is high, the focusing effect is good, running resources are saved, and the service life of the projector is increased.
- this embodiment provides an auxiliary tool which is independent of the projector and is in communication connection with the projector.
- the auxiliary tool includes:
- Focus command receiving module used to receive focus commands and send shooting signals to the shooting module
- Shooting module used to receive the shooting signal sent by the focus command receiving module and shoot the projected image, and then send the captured projected image to the image processing module;
- Image processing module used to receive the projection image sent by the shooting module and analyze the definition of the projection image, and send a focusing signal to the communication module according to the definition of the projection image;
- Communication module used to receive the focus signal sent by the image processing module and send the focus signal to the projector.
- the focus command receiving module may be a focus APP installed on the auxiliary tool
- the communication module may be a WIFI module, a Bluetooth communication module or other communication modules.
- the auxiliary tool is a mobile terminal with a CPU
- the CPU includes the image processing judgment module
- the auxiliary tool provided in this embodiment further includes:
- Storage module used to store standard images
- the image processing module includes:
- Comparative analysis unit used to compare and analyze the received projection image according to the standard image to obtain the definition of the projection image
- the first judging unit judging whether the sharpness of the projected image is less than the preset value, if so, the sharpness of the projected image does not meet the requirements, and sending a focusing signal to the communication module, if not, the current focusing ends.
- the mobile terminal in this embodiment may be a mobile phone with shooting function and image processing analysis function, or other devices with shooting function and image processing analysis function, such as a camera, a tablet, a watch with a shooting function, etc.
- the focusing signal includes information about the rotation direction of the focus motor of the projector and information about the number of rotation steps of the focus motor of the projector.
- the auxiliary tool further includes:
- Focusing completion signal receiving unit used to receive the adjustment completion signal sent by the projector through the communication module, and then send the shooting signal to the shooting module;
- the image processing module further includes:
- Second judging unit used to judge whether the sharpness of the projected image after focusing is better than that of the previous frame of projected image, if so, send the same direction focusing signal to the communication module, otherwise send the reverse focusing signal to Communication module
- the rotation direction information of the projector focus motor in the same direction focus signal is the same as the rotation direction information of the projector focus motor in the previous focus signal, and the projector focus motor rotation in the reverse focus signal
- the direction information is opposite to the rotation direction information of the projector focusing motor in the focusing signal sent last time.
- this embodiment provides a projection system including a projector and the auxiliary tool provided in Embodiment 3.
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Abstract
本发明公开一种基于辅助工具的对焦方法，应用于设置有拍摄模块的辅助工具，所述辅助工具独立于投影仪，所述方法包括：接收对焦命令；根据对焦命令启动拍摄模块并拍摄投影图像；对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求，如果不符合，进行下一步，否则本次对焦结束；发送调焦信号给投影仪。本发明通过增加独立于投影仪的辅助工具，可以保证投影系统对焦时不受投影仪本身结构或使用场景的限制，从而实现高效自动对焦。
Description
本发明涉及投影对焦领域，具体涉及一种基于辅助工具的对焦方法、辅助工具及投影系统。
投影系统已经广泛应用于办公和家庭中，为了降低投影设备占用空间，可以采用侧投方式，对于长焦机而言，可以安装反射镜将长焦机调整为超短焦机使用，但是，不管是侧投还是超短焦机，仅仅采用投影仪自身带的摄像头是没办法进行很好地自动对焦的，因为投影仪自身带的摄像头在侧投时无法对准投影画面，而超短焦机的摄像头无法对整个投影画面进行采集，因此在侧投和超短焦机等类似场景下，由于投影仪自身带的摄像头对当前投影画面不能进行准确采集，这会直接导致自动对焦功能无法使用或对焦效果不好。
发明内容
有鉴于此，本申请的一方面在于从辅助工具侧提供一种基于辅助工具的对焦方法，通过增加独立于投影仪的辅助工具，可以保证投影系统对焦时不受投影仪本身结构或使用场景的限制，从而实现高效自动对焦。为解决以上技术问题，本申请通过以下技术手段实现：
基于辅助工具的对焦方法，应用于设置有拍摄模块的辅助工具，所述辅助工具独立于投影仪，所述方法包括：
接收对焦命令；
根据对焦命令启动拍摄模块并拍摄投影图像；
对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求，如果不符合，进行下一步，否则本次对焦结束；
发送调焦信号给投影仪。
进一步地，所述辅助工具内储存有标准图像，所述对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求包括：
将投影图像与所述标准图像进行对比分析，得到投影图像的清晰度；
判断投影图像的清晰度是否小于预设值，如果小于，则投影图像的清晰度不符合要求。
进一步地，所述调焦信号包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息。
进一步地，所述方法还包括：
接收投影仪发送的调焦完成信号；
拍摄投影仪调焦后投放的投影图像；
判断调焦后的投影图像的清晰度是否符合要求，如果不符合，进行下一步，否则本次对焦结束；
判断调焦后的投影图像的清晰度是否优于前一帧投影图像的清晰度，如果是，发送同向调焦信号给投影仪，否则发送反向调焦信号给投影仪；
返回所述接收投影仪发送的调焦完成信号这一步骤；
其中，同向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相同，反向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相反。
本申请的另一方面在于从投影仪侧提供一种基于辅助工具的对焦方法，所述方法应用于投影仪，所述投影仪独立于所述辅助工具，所述方法包括：
接收辅助工具发送的调焦信号；
根据调焦信号转动调焦马达；
重新投放投影图像；
发送调焦完成信号给辅助工具。
本申请的又一方面在于提供一种辅助工具，所述辅助工具独立于投影仪且与投影仪通信连接，所述辅助工具包括：
对焦命令接收模块：用于接收对焦命令并发送拍摄信号给拍摄模块；
拍摄模块：用于接收对焦命令接收模块发送的拍摄信号并拍摄投影图像，然后将拍摄到的投影图像发送给图像处理模块；
图像处理判断模块：用于对接收到的投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求，如果不符合，发送调焦信号给通信模块，否则本次对焦结束；
通信模块：用于接收图像处理模块发送的调焦信号并将调焦信号发送给投影仪。
进一步地，所述辅助工具为带有CPU的移动终端，所述CPU包括所述图像处理判断模块，所述辅助工具还包括：
储存模块：用于储存标准图像；
所述图像处理模块包括：
对比分析单元：用于根据所述标准图像对接收到的投影图像进行对比分析，得到投影图像的清晰度；
第一判断单元：判断投影图像的清晰度是否小于预设值，如果是，则投影图像的清晰度不符合要求，发送调焦信号给通信模块，如果不是，本次对焦结束。
进一步地，所述调焦信号包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息。
进一步地，所述辅助工具还包括：
调焦完成信号接收单元：用于通过通信模块接收投影仪发送的调整完成信号，然后发送拍摄信号给拍摄模块；
所述图像处理模块还包括：
第二判断单元：用于判断调焦后的投影图像的清晰度是否优于前一帧投影图像 的清晰度，如果是，发送同向调焦信号给通信模块，否则发送反向调焦信号给通信模块；
其中，同向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相同，反向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相反。
本申请的再一方面还在于提供一种投影系统，包括投影仪，还包括上述辅助工具。
本申请提供的基于辅助工具的对焦方法，通过增加独立于投影仪的辅助工具，可以保证投影系统对焦时不受投影仪本身结构或使用场景的限制，从而实现高效自动对焦。
图1为根据一示例性实施例示出的一种基于辅助工具的对焦方法流程图。
图2为根据另一示例性实施例示出的另一种基于辅助工具的对焦方法流程图。
图3为根据一示例性实施例示出的一种辅助工具结构框图。
图4为根据一示例性实施例示出的一种投影系统结构框图。
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施例对本发明作进一步的详细说明。
实施例1
如图1所示，本实施例从辅助工具侧提供一种基于辅助工具的对焦方法，本方法应用于设置有拍摄模块的辅助工具，所述辅助工具独立于投影仪，所述方法包括：
S1：接收对焦命令；
S2：根据对焦命令启动拍摄模块并拍摄投影图像；
S3：对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否 符合要求，如果不符合，进行下一步，否则本次对焦结束；
S4：发送调焦信号给投影仪。
这里需要说明的是，本实施例中的辅助工具可以是具有拍摄功能和图片处理分析功能的手机，也可以是有拍摄功能和图片处理分析功能的其他设备，比如摄像机、平板、带拍摄功能的手表等，需要特别说明的是，本实施例中的图片处理过程是在辅助工具中进行的，之所以这么设计，是因为辅助工具拍摄投影图像后，如果直接将投影图像传送给投影仪，由于投影图像内容太大，辅助工具需要先对投影图像进行压缩、加密等处理，而且传输时间也较长，投影仪接收到投影图像后又要进行解压、解密等处理，不仅浪费时间，而且占用资源，对焦效率低，本实施例直接在辅助工具内分析拍摄回来的投影图像并判断出投影图像的清晰度是否符合要求，如果投影图像的清晰度符合要求，则不需要投影仪做任何动作，或者只需要告知投影仪当前投影图像清晰度符合要求这一信息即可，如果投影图像的清晰度不符合要求，辅助工具只需要发送调焦信号给投影仪即可(调焦信号的传输时间远低于投影图像的传输时间)，投影仪根据调焦信号驱动调焦马达进行调焦，整个过程不增加投影仪的运行负担，而且相比投影仪，辅助工具在处理速度和处理能力上均优于投影仪，这样的分工合作方式可以极大提高投影系统的对焦效率和对焦效果。还需要说明的是，本实施例步骤S3中的图像处理方法采用本领域常规技术手段即可实现。
另外，本实施例中的辅助工具上可以安装具有对焦功能的APP，通过APP可以响应用户的对焦触发命令(相当于S1中的接收对焦命令)，也可以直接接收投影仪发送的对焦命令，APP接收到对焦命令后控制拍摄模块(比如摄像头)开启进行拍摄投影图像。在具体实施本实施例时，投影仪与辅助工具之间可以通过短距离无线方式连接，比如蓝牙、超宽带、ZigBee和Wifi等。
作为优选，所述辅助工具内储存有标准图像，所述对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求包括：
S31：将投影图像与所述标准图像进行对比分析，得到投影图像的清晰度；
S32：判断投影图像的清晰度是否小于预设值，如果小于，则投影图像的清晰度不符合要求。
这里需要说明的是，标准图像可以是一系列清晰度不同的图像，本实施例采用本领域常规技术手段对投影图像和标准图像进行对比分析，得到投影图像的清晰度，如果清晰度小于预设值，则投影图像的清晰度不符合要求。
作为优选，本实施例中的调焦信号可以包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息。
这里需要说明的是，投影仪调焦马达转动方向信息包括正方向和反方向，投影仪调焦马达转动步数信息可以选择默认值，也可以根据实际辛苦设置，比如调焦信号为(正方向，3步)，那么，投影仪接收到该调焦信号后驱动调焦马达往正方向转动3步，至于顺时针方向为正还是逆时针方向为正，这个可以事先约定好。
作为优选，本实施例提供的方法还包括：
S5：接收投影仪发送的调焦完成信号；
S6：拍摄投影仪调焦后投放的投影图像；
S7：判断调焦后的投影图像的清晰度是否符合要求，如果不符合，进行下一步，否则本次对焦结束；
S8：判断调焦后的投影图像的清晰度是否优于前一帧投影图像的清晰度，如果是，发送同向调焦信号给投影仪，否则发送反向调焦信号给投影仪；
S9：返回所述接收投影仪发送的调焦完成信号这一步骤；
其中，同向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相同，反向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相反。
这里需要说明的是，由于在步骤S4中，当辅助工具第一次拍摄回来的投影图 像清晰度不符合要求时，辅助工具并不清楚投影仪的调焦马达应该往正方向转动还是反方向转动，这个时候只能先试着发送一个调焦信号给投影仪，假设该调焦信号为(正方向，a步)，在投影仪根据接收到的调焦信号进行首次调焦后，投影图像很可能还是不满足清晰度要求，这个时候需要辅助工具拍摄投影仪调焦后投放的投影图像进行清晰度验证，也就是需要进行步骤S5—S7，如果投影仪调焦后投放的投影图像清晰度符合要求，则本次对焦结束，拍摄模块关闭，如果投影仪调焦后投放的投影图像清晰度仍然不符合要求，则进行步骤S8和步骤S9，对于步骤S8，如果投影仪调焦后投放的投影图像进行清晰度相比前一帧投影图像的清晰度有改善，则可以发送同向调焦信号(正方向，b步)给投影仪，如果投影仪调焦后投放的投影图像进行清晰度比前一帧投影图像的清晰度查，则可以发送反向调焦信号(反方向，c步)给投影仪，其中，a、b、c的取值根据实际情况进行确定，完成步骤S8后，进行步骤S9，即返回步骤S5。还需要说明的是，同向调焦信号和反向调焦信号是相对上个调焦信号而言的，假设上个调焦信号的调焦马达转动方向信息为反方向，那么同向调焦信号的调焦马达转动方向信息为反方向，反向向调焦信号的调焦马达转动方向信息为正方向，假设上个调焦信号的调焦马达转动方向信息为正方向，那么同向调焦信号的调焦马达转动方向信息为正方向，反向向调焦信号的调焦马达转动方向信息为反方向。
实施例2
如图2所示，本实施例从投影仪侧提供一种基于辅助工具的对焦方法，本方法应用于投影仪，所述投影仪独立于所述辅助工具，所述方法包括：
P1：接收辅助工具发送的调焦信号；
P2：根据调焦信号转动调焦马达；
P3：重新投放投影图像；
P4：发送调焦完成信号给辅助工具。
另外，本实施例还包括：发送对焦命令给辅助工具。
这里需要说明的是，本实施例中，调焦信号包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息，投影仪进行对焦时，只需要根据从辅助工具接收的调焦信号直接驱动调焦马达进行调焦即可，不需要进行图像处理，对焦效率高，对焦效果好，节约运行资源，提高投影仪的使用寿命。
实施例3
如图3所示，本实施例提供一种辅助工具，所述辅助工具独立于投影仪且与投影仪通信连接，所述辅助工具包括：
对焦命令接收模块：用于接收对焦命令并发送拍摄信号给拍摄模块；
拍摄模块：用于接收对焦命令接收模块发送的拍摄信号并拍摄投影图像，然后将拍摄到的投影图像发送给图像处理模块；
图像处理模块：用于接收拍摄模块发送的投影图像并分析投影图像的清晰度，根据投影图像的清晰度发送调焦信号给通信模块；
通信模块：用于接收图像处理模块发送的调焦信号并将调焦信号发送给投影仪。
这里需要说明的是，对焦命令接收模块可以是安装于辅助工具上的对焦APP，通信模块可以是WIFI模块、蓝牙通信模块或其他通信模块。
作为优选，本实施例中，所述辅助工具为带有CPU的移动终端，所述CPU包括所述图像处理判断模块，本实施例提供的辅助工具还包括：
储存模块：用于储存标准图像；
所述图像处理模块包括：
对比分析单元：用于根据所述标准图像对接收到的投影图像进行对比分析，得到投影图像的清晰度；
第一判断单元：判断投影图像的清晰度是否小于预设值，如果是，则投影图像的清晰度不符合要求，发送调焦信号给通信模块，如果不是，本次对焦结束。
这里，本实施例中的移动终端可以是具有拍摄功能和图片处理分析功能的手机，也可以是有拍摄功能和图片处理分析功能的其他设备，比如摄像机、平板、带拍摄功能的手表等。
作为优选，所述调焦信号包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息。
作为优选，所述辅助工具还包括：
调焦完成信号接收单元：用于通过通信模块接收投影仪发送的调整完成信号，然后发送拍摄信号给拍摄模块；
所述图像处理模块还包括：
第二判断单元：用于判断调焦后的投影图像的清晰度是否优于前一帧投影图像的清晰度，如果是，发送同向调焦信号给通信模块，否则发送反向调焦信号给通信模块；
其中，同向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相同，反向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相反。
实施例4
如图4所示，本实施例提供一种投影系统，包括投影仪和实施例3提供的辅助工具。
关于辅助工具和投影系统的具体操作方式已经在方法实施例中进行了详细描述，此处不做详细阐述。
以上仅是本发明的优选实施方式，应当指出的是，上述优选实施方式不应视为对本发明的限制，本发明的保护范围应当以权利要求所限定的范围为准。对于本技术领域的普通技术人员来说，在不脱离本发明的精神和范围内，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
Claims (10)
- 基于辅助工具的对焦方法，其特征在于，应用于设置有拍摄模块的辅助工具，所述辅助工具独立于投影仪，所述方法包括：接收对焦命令；根据对焦命令启动拍摄模块并拍摄投影图像；对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求，如果不符合，进行下一步，否则本次对焦结束；发送调焦信号给投影仪。
- 根据权利要求1所述的基于辅助工具的对焦方法，其特征在于，所述辅助工具内储存有标准图像，所述对投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求包括：将投影图像与所述标准图像进行对比分析，得到投影图像的清晰度；判断投影图像的清晰度是否小于预设值，如果小于，则投影图像的清晰度不符合要求。
- 根据权利要求1所述的基于辅助工具的对焦方法，其特征在于，所述调焦信号包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息。
- 根据权利要求3所述的基于辅助工具的对焦方法，其特征在于，还包括：接收投影仪发送的调焦完成信号；拍摄投影仪调焦后投放的投影图像；判断调焦后的投影图像的清晰度是否符合要求，如果不符合，进行下一步，否则本次对焦结束；判断调焦后的投影图像的清晰度是否优于前一帧投影图像的清晰度，如果是，发送同向调焦信号给投影仪，否则发送反向调焦信号给投影仪；返回所述接收投影仪发送的调焦完成信号这一步骤；其中，同向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信 号中的投影仪调焦马达转动方向信息相同，反向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相反。
- 基于辅助工具的对焦方法，其特征在于，应用于投影仪，所述投影仪独立于所述辅助工具，所述方法包括：接收辅助工具发送的调焦信号；根据调焦信号转动调焦马达；重新投放投影图像；发送调焦完成信号给辅助工具。
- 辅助工具，其特征在于，所述辅助工具独立于投影仪且与投影仪通信连接，所述辅助工具包括：对焦命令接收模块：用于接收对焦命令并发送拍摄信号给拍摄模块；拍摄模块：用于接收对焦命令接收模块发送的拍摄信号并拍摄投影图像，然后将拍摄到的投影图像发送给图像处理模块；图像处理判断模块：用于对接收到的投影图像进行处理得到投影图像的清晰度，判断投影图像的清晰度是否符合要求，如果不符合，发送调焦信号给通信模块，否则本次对焦结束；通信模块：用于接收图像处理模块发送的调焦信号并将调焦信号发送给投影仪。
- 根据权利要求6所述的辅助工具，其特征在于，所述辅助工具为带有CPU的移动终端，所述CPU包括所述图像处理判断模块，所述辅助工具还包括：储存模块：用于储存标准图像；所述图像处理模块包括：对比分析单元：用于根据所述标准图像对接收到的投影图像进行对比分析，得到投影图像的清晰度；第一判断单元：判断投影图像的清晰度是否小于预设值，如果是，则投影图像 的清晰度不符合要求，发送调焦信号给通信模块，如果不是，本次对焦结束。
- 根据权利要求6所述的辅助工具，其特征在于，所述调焦信号包括投影仪调焦马达转动方向信息和投影仪调焦马达转动步数信息。
- 根据权利要求8所述的辅助工具，其特征在于，还包括：调焦完成信号接收单元：用于通过通信模块接收投影仪发送的调整完成信号，然后发送拍摄信号给拍摄模块；所述图像处理模块还包括：第二判断单元：用于判断调焦后的投影图像的清晰度是否优于前一帧投影图像的清晰度，如果是，发送同向调焦信号给通信模块，否则发送反向调焦信号给通信模块；其中，同向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相同，反向调焦信号中的投影仪调焦马达转动方向信息与前一次发送的调焦信号中的投影仪调焦马达转动方向信息相反。
- 投影系统，包括投影仪，其特征在于，还包括权利要求5—7任意一项所述的辅助工具。
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| CN113070566B (zh) * | 2021-03-02 | 2022-05-27 | 苏州科韵激光科技有限公司 | 一种自动寻焦的方法及装置 |
| CN113709430B (zh) * | 2021-07-23 | 2024-06-21 | 深圳市金研微科技有限公司 | 一种投影机自动无感对焦的方法和装置 |
| CN115327847B (zh) * | 2022-08-22 | 2024-05-14 | 深圳康佳电子科技有限公司 | 一种基于手机拍照实现投影仪自动对焦的处理方法及系统 |
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