WO2017000811A1 - 一种投影图像调整方法及投影仪 - Google Patents

一种投影图像调整方法及投影仪 Download PDF

Info

Publication number
WO2017000811A1
WO2017000811A1 PCT/CN2016/086621 CN2016086621W WO2017000811A1 WO 2017000811 A1 WO2017000811 A1 WO 2017000811A1 CN 2016086621 W CN2016086621 W CN 2016086621W WO 2017000811 A1 WO2017000811 A1 WO 2017000811A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
parameter
projection
screen
parameters
Prior art date
Application number
PCT/CN2016/086621
Other languages
English (en)
French (fr)
Inventor
唐金腾
Original Assignee
芋头科技（杭州）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 芋头科技（杭州）有限公司 filed Critical 芋头科技（杭州）有限公司
Publication of WO2017000811A1 publication Critical patent/WO2017000811A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention relates to the field of image processing technologies, and in particular, to a projection image adjustment method.
  • the projection screen is white, or a white-colored pale screen, so as to ensure the image quality of the projected image to the utmost. If the selected projection screen is not white, for example, the screen is yellow, red, green or other colors, or there is color ambient lighting effect, the image projected on the projection screen may be affected by the background color of the screen or ambient lighting to produce image distortion. That is, a projection deviation occurs between the image seen by the user and the original image, thereby reducing the viewing experience of the user and at the same time limiting the diversity of projection screen selection.
  • a projection image adjustment method and a projector are provided, which aim to solve the problem that the projection image is distorted by the influence of the screen background color or the ambient color in the prior art.
  • a projection image adjustment method wherein an image sensor is mounted on a projector to acquire a screen image displayed on a corresponding projection screen;
  • the projection image adjustment method specifically includes:
  • Step S1 collecting, by using the image sensor, the screen image of the current frame
  • Step S2 comparing at least one type of image parameters of the screen image of the acquired current frame with corresponding image parameters of a corresponding one frame of the original image saved in the projector, and outputting a comparison result;
  • Step S3 determining, according to the comparison result, a parameter difference between the image parameter of the screen image and the image parameter of the original image:
  • Step S4 according to the parameter difference value, associated with projecting the original image in the projector
  • the projection parameters are adjusted, and the original image of the next frame is projected onto the corresponding projection screen according to the adjusted projection parameters, and then returns to the step S1.
  • the projection image adjustment method wherein the category of the image parameter comprises:
  • RGB color channel component parameters
  • the projection image adjustment method in the step S3, determining according to the parameter difference corresponding to the at least one type of the image parameter, and the projection parameter according to at least one of the parameter difference values Make adjustments.
  • the projection image adjustment method wherein the screen image and the original image are respectively divided into a plurality of pixel blocks of equal size;
  • each of the pixel blocks associated with the screen image is compared with a corresponding pixel block associated with the original image to obtain the corresponding pixel block.
  • the step S4 specifically includes:
  • Step S41 adjusting, according to the parameter difference value, the projection parameter associated with each of the pixel blocks that project the original image
  • Step S42 the original image is stitched according to all the pixel blocks that have been adjusted and projected on the projection screen, and then returns to the step S1.
  • the projection image adjustment method wherein, in the step S3, the preset difference value ranges from 0;
  • step S3 a parameter difference between the image parameter of the screen image and the image parameter of the original image is determined, and when the parameter difference is 0, the mode is directly exited.
  • the projection image adjustment method is applied to a digital light processing projection system.
  • a projector in which the above-described projection image adjustment method is applied is applied.
  • the beneficial effects of the above technical solution are: providing a projection image adjustment method capable of eliminating the influence of a projection screen having a background color or a different projection environment on the projection image, and expanding the projection screen The diversity of choices enhances the user's viewing experience.
  • 1-2 is a flow chart showing a method for adjusting a projection image in a preferred embodiment of the present invention.
  • DLP projection technology is a projection technology that enables digital information display.
  • DLP projection technology uses Digital Micro-mirror Device (DMD) as a light valve imaging device, which can achieve image gray scale of 256-1024, color types up to 2563-10243, and has the advantage of reflection, making imaging The total light efficiency of the device is over 60%.
  • DLP projection technology including conventional cathode ray tube (CRT) projection technology and liquid crystal device (LCD) projection technology, has limitations on projection screen selection, that is, white or approximation must be selected.
  • the white light-colored screen serves as a projection screen, and minimizes the influence of colored ambient light on the projected image to present a more realistic projected image to the user on the projection screen.
  • the reason for the above limitation is that the projector itself does not automatically change the projected image according to the screen color.
  • the projector is designed without considering the factors that affect the projected image by the color of the screen and/or the ambient color. Therefore, the projector cannot be targeted.
  • the background color of the screen and/or the ambient color responds in a timely manner.
  • the above-described projection image adjustment method is applied to a projector, provided that an image sensor is disposed on the projector to capture a screen image displayed by the projector on the projection screen.
  • the orientation of the image sensor is consistent with the orientation of the projection lamp, both facing the projection screen.
  • the image sensor does not change the image quality of the captured image during the acquisition process, that is, the screen image projected on the projection screen is consistent with the screen image captured by the image sensor.
  • the method for adjusting a projection image specifically includes:
  • Step S1 acquiring a screen image of the current frame by using an image sensor
  • the image sensor collects each frame of the screen image and feeds it into the projector in time.
  • Step S2 comparing at least one type of image parameters of the collected screen image of the current frame with corresponding image parameters of a corresponding one frame of the original image saved in the projector, and outputting the comparison result;
  • the categories of image parameters may include:
  • RGB color channel component parameters
  • the RGB color channel component parameters may include an R channel component parameter, a G channel component parameter, and a B channel component parameter. In the subsequent parameter adjustment process, only the R channel component parameters, and/or the G channel component parameters, and/or the B channel component parameters may be determined and adjusted.
  • the image parameters may include other categories that can be characterized as image quality that are not listed above, and are not described herein again.
  • the so-called original image refers to a good image generated in the projector, that is, the original image is projected on a projection screen to form a screen image.
  • the background color of the projection screen is not necessarily white, and the projection environment may be colored, it may affect the image quality of the screen image projected on the projection screen.
  • the screen image is not necessarily the same as the original image, and there may be a deviation between the image parameter associated with the screen image described above and the corresponding image parameter associated with the original image, and such deviations are reflected in the comparison result.
  • only one or several types of image parameters as described above may be compared, and the number of categories of image parameters participating in the comparison may be previously fixed in the processor inside the projector, or It is set by the user according to different projection environments and/or different projection accuracy requirements.
  • Step S3 according to the comparison result, determining a parameter difference between the image parameter of the screen image and the image parameter of the original image:
  • the parameter difference value refers to a difference between an image parameter associated with the screen image and an image parameter associated with the original image corresponding to the same type of image parameter. For example, corresponding to the R channel component parameter, the difference between the R channel component parameter associated with the screen image and the R channel component parameter associated with the original image.
  • the range of difference refers to a range of image distortion that a predetermined user can accept, that is, an image distortion range that is difficult for the user to perceive by the naked eye. Specifically, if the parameter difference corresponding to one type of image parameter falls within the predetermined difference range, the difference between the screen image projected on the projection screen and the original image in the projector is relatively small, and the user is difficult to obtain through the naked eye. Resolve.
  • the difference range may be set according to actual needs.
  • the parameter difference value when the parameter difference value is included in the preset difference range, it is considered that the distortion degree of the screen image is within an acceptable range, so there is no need to adjust the projection parameter accordingly. , you can exit directly.
  • the difference range can be set to 0, which means that the distortion of the screen image is considered to be acceptable only when the difference parameter is 0, that is, only when the screen image and the original image are Exit directly when they are the same.
  • multiple types of image parameters, or multiple image parameters of a class of image parameters may be selected for comparison, for example:
  • the final comparison result is the comparison result of the RGB color channel component parameter and the color saturation parameter.
  • the integrated value that is, only when the parameter difference associated with the RGB color channel component parameter and the parameter difference associated with the color saturation parameter fall within the above difference range, it is considered that adjustment is not needed at this time, and directly drop out.
  • a difference range can be set corresponding to a type of image parameter, and only the parameter differences associated with each type of compared image parameter fall within the corresponding difference range. When you think that you don't need to make adjustments at this time, you can quit directly.
  • the R channel component parameter and the G channel component parameter in the RGB color channel component parameter can be selected, and only the parameter difference associated with the R channel component parameter and the parameter difference associated with the G channel component parameter fall within the corresponding When the difference is within the range, it is considered that no adjustment is needed at this time and exits directly.
  • the categories of image parameters participating in the comparison, and the subcategories in each category may be flexibly adjusted according to actual conditions.
  • Channel component parameters, and / or B channel component parameters to meet the needs of different projection adjustment accuracy.
  • Step S4 adjusting the projection parameters associated with the projected original image in the projector according to the parameter difference, and projecting the next frame original image onto the corresponding projection screen according to the adjusted projection parameters, and then returning to step S1.
  • step S4 comparing the R channel component parameters as an example, if the parameter difference analysis is performed, the parameter associated with the R channel component of the screen image is greater than the R channel component parameter of the original image. , after the original image is projected onto the screen image, the R channel component parameter is increased, then the projection parameter in the projector needs to be reduced accordingly (the gain of the projection parameter associated with the R channel parameter component is reduced); otherwise, the corresponding Increase the projection parameters in the projector (increasing the gain of the projection parameters associated with the R channel parameter components).
  • the projector projects the next frame image to the projection screen according to the adjusted projection parameters, and returns to step S1 to continue to monitor the image distortion degree of the screen image until the image distortion degree satisfies the demand. .
  • a plurality of pixel blocks of equal size are respectively divided for the screen image and the original image, for example, by 1*1. Do not divide the screen image and the original image into a plurality of pixel blocks. Then, in the above step S3, each pixel block associated with the screen image is compared with a corresponding pixel block associated with the original image to obtain a parameter difference corresponding to each pixel block and output. In other words, each pixel block is treated as a separate image picture for independent comparison, and the parameter difference corresponding to each pixel block is output.
  • step S4 specifically includes:
  • Step S41 adjusting projection parameters associated with each pixel block of the projected original image according to the parameter difference value
  • step S42 the original image is stitched according to all the adjusted pixel blocks and projected on the projection screen, and then returns to step S1.
  • the process of comparing the original entire image is evolved to divide the image into small pixel blocks and compare them separately, thereby greatly improving image adjustment. Precision.
  • the number of pixel blocks divided on an image can be determined according to the required image adjustment accuracy.
  • the method for dividing a pixel block can cope with a situation in which a plurality of background colors are provided on one projection screen, and/or a projected image in a projection environment of ambient light having multiple colors. Image quality.
  • the screen image of the current playback frame is acquired and compared with the original image of the corresponding frame in the projector to obtain the parameter difference between the corresponding image parameters.
  • the corresponding projection parameters in the projector are adjusted according to the parameter difference, and the adjusted projection parameters are used to continue to project the next frame image to the projection screen, and at the same time continue to monitor the image distortion degree of the next frame image.
  • the above process loops back and forth until the image distortion degree of a certain frame image satisfies the demand (the parameter difference falls within the difference range).
  • the above technical solution can make up for the problem that the image display quality cannot be changed for different projection environments in the prior art, can expand the diversity of the projection screen selection, improve the stability of the image quality of the projected image, and thereby enhance the viewing experience of the user.
  • the above-described projection image adjustment method can be applied to the above DLP projection system.
  • the above-described projection image adjustment method can also be applied to other projection systems such as a CRT projection system or an LCD projection system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

一种投影图像调整方法及投影仪，属于图像处理技术领域；方法包括：步骤S1，通过图像传感器采集得到屏幕图像；步骤S2，将屏幕图像的至少一类图像参数与投影仪中保存的原始图像的相应的图像参数进行比较；步骤S3，根据比较结果，判断屏幕图像的图像参数与原始图像的图像参数之间的参数差值：若参数差值包括在差值范围内则退出；步骤S4，根据参数差值对投影仪中关联于投影原始图像的投影参数进行调整，并根据经过调整的投影参数将下一帧原始图像投影到投影屏幕上，随后返回步骤S1。上述技术方案的有益效果是：消除具有背景色的投影屏幕或者不同的投影环境对投影图像的影响，扩展投影屏幕选择的多样性，提升使用者的观赏体验。

Description

一种投影图像调整方法及投影仪 技术领域
本发明涉及图像处理技术领域，尤其涉及一种投影图像调整方法。
背景技术
现有的投影技术中，通常需要投影屏幕为白色，或者近似白色的淡色屏幕，如此才能最大限度保证投影图像的影像质量。若选择的投影屏幕不是白色，例如屏幕是黄色、红色、绿色或者其他颜色，或者存在彩色的环境光照影响，则投影在投影屏幕上的图像可能会受到屏幕背景色或者环境光照影响而产生图像失真，即使用者看到的图像与原始图像之间出现投影偏差，从而降低使用者的观赏体验，并同时限制了投影屏幕选择的多样性。
发明内容
根据现有技术中存在的问题，现提供一种投影图像调整方法及投影仪，旨在解决现有技术中投影图像受屏幕背景色或者环境色影响而失真的问题。
上述技术方案具体包括：
一种投影图像调整方法，其中，于投影仪上安装一图像传感器，以获取对应的投影屏幕上显示的屏幕图像；
所述投影图像调整方法具体包括：
步骤S1，通过所述图像传感器采集得到当前帧的所述屏幕图像；
步骤S2，将采集得到的当前帧的所述屏幕图像的至少一类图像参数与所述投影仪中保存的相应的一帧原始图像的相应的所述图像参数进行比较，并输出比较结果；
步骤S3，根据所述比较结果，判断所述屏幕图像的所述图像参数与所述原始图像的所述图像参数之间的参数差值：
若所述参数差值包括在一个预设的差值范围内，则退出；
步骤S4，根据所述参数差值对所述投影仪中关联于投影所述原始图像的 投影参数进行调整，并根据经过调整的所述投影参数将下一帧所述原始图像投影到对应的所述投影屏幕上，随后返回所述步骤S1。
优选的，该投影图像调整方法，其中，所述图像参数的类别包括：
RGB颜色通道分量参数；和/或
伽马曲线参数；和/或
直方图参数；和/或
信噪比参数；和/或
色彩饱和度参数；和/或
亮度参数。
优选的，该投影图像调整方法，其中，所述步骤S3中，根据对应至少一类所述图像参数的所述参数差值进行判断，并根据对应至少一个所述参数差值对所述投影参数进行调整。
优选的，该投影图像调整方法，其中，分别将所述屏幕图像和所述原始图像划分多个大小相等的像素块；
所述步骤S3中，分别对每个关联于所述屏幕图像的所述像素块与相应的关联于所述原始图像的所述像素块进行比较，以得到对应每个所述像素块的所述参数差值并输出；
所述步骤S4具体包括：
步骤S41，根据所述参数差值，对关联于投影所述原始图像的每个所述像素块的所述投影参数进行调整；
步骤S42，根据经过调整的所有所述像素块拼合所述原始图像并投影在所述投影屏幕上，随后返回所述步骤S1。
优选的，该投影图像调整方法，其中，所述步骤S3中，所述预设的差值范围为0；
则所述步骤S3中，判断所述屏幕图像的所述图像参数与所述原始图像的所述图像参数之间的参数差值，并在所述参数差值为0时，直接退出。
优选的，该投影图像调整方法，其中，应用于数字光处理投影系统中。
一种投影仪，其中，应用上述的投影图像调整方法。
上述技术方案的有益效果是：提供一种投影图像调整方法，能够消除具有背景色的投影屏幕或者不同的投影环境对投影图像的影响，扩展投影屏幕 选择的多样性，提升使用者的观赏体验。
附图说明
图1-2是本发明的较佳的实施例中，一种投影图像调整方法的流程示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。
下面结合附图和具体实施例对本发明作进一步说明，但不作为本发明的限定。
最新的投影技术，即数字光处理器(Digital Light Processor，DLP)投影技术，是一种能够实现数字信息显示的投影技术。DLP投影技术以数字微反射器(Digital Micro-mirror Device，DMD)作为光阀成像器件，能够使得图像灰度等级达到256-1024级，色彩种类达到2563-10243种，并且拥有反射优势，使得成像器件的总光效率达到60％以上等。但是DLP投影技术，包括传统使用的阴极射线管(Cathode Ray Tube，CRT)投影技术以及液晶设备(Liquid Crystal Device，LCD)投影技术等，均具有投影屏幕选择上的限制，即必须选择白色或者近似白色的淡色屏幕作为投影屏幕，并尽量减少彩色的环境光对投影图像的影响，才能在投影屏幕上向使用者呈现比较真实的投影图像。上述限制产生的原因在于投影仪本身并没有根据屏幕颜色自动改变投影影像的能力，在设计投影仪的时候没有考虑到屏幕颜色和/或环境色对投影图像产生影响的因素，因此投影仪无法针对屏幕背景色和/或环境色做出及时反应。
本发明的较佳的实施例中，基于现有技术中存在的上述问题，现提供一种投影图像调整方法的技术方案。
本发明的较佳的实施例中，上述投影图像调整方法应用于投影仪，其前提为在投影仪上设置一个图像传感器，以采集投影仪投影在投影屏幕上显示的屏幕图像。因此，本发明的较佳的实施例中，图像传感器的朝向与投影灯的朝向一致，均面向投影屏幕。
本发明的较佳的实施例中，上述图像传感器在采集过程中，不会改变所采集图像的图像质量，即投影在投影屏幕上的屏幕图像与图像传感器采集到的屏幕图像一致。
本发明的较佳的实施例中，如图1所示，上述投影图像调整方法具体包括：
步骤S1，通过图像传感器采集得到当前帧的屏幕图像；
本发明的较佳的实施例中，图像传感器对每一帧屏幕图像进行采集，并及时送入投影仪中。
步骤S2，将采集得到的当前帧的屏幕图像的至少一类图像参数与投影仪中保存的相应的一帧原始图像的相应的图像参数进行比较，并输出比较结果；
本发明的较佳的实施例中，图像参数的类别可以包括：
RGB颜色通道分量参数；和/或
伽马曲线参数；和/或
直方图参数；和/或
信噪比参数；和/或
色彩饱和度参数；和/或
亮度参数。
其中，RGB颜色通道分量参数可以包括R通道分量参数、G通道分量参数以及B通道分量参数。在后续的参数调整过程中，可以只判断和调整R通道分量参数，和/或G通道分量参数，和/或B通道分量参数。
本发明的其他实施例中，上述图像参数可以包括未在上文中列明的其他能够表征图像质量的类别，在此不再赘述。
本发明的较佳的实施例中，所谓原始图像，是指投影仪中生成好的图像，即将原始图像投影在投影屏幕上以形成屏幕图像。本发明的较佳的实施例中，由于投影屏幕的背景色不一定是白色，且投影环境光亮也可能为彩色，因此可能会对投影在投影屏幕上的屏幕图像的图像质量造成一定影响，因此上述 屏幕图像与原始图像不一定相同，则关联于上述屏幕图像的图像参数与关联于上述原始图像的相应的图像参数之间可能会存在偏差，这种偏差均反应在比较结果中。
本发明的较佳的实施例中，可以只比较如上文中所述的其中一类或者几类图像参数，参与比较的图像参数的类别数量可以是事先固化在投影仪内部的处理器中，也可以由使用者根据不同的投影环境和/或不同的投影精度需求进行设定得到。
步骤S3，根据比较结果，判断屏幕图像的图像参数与原始图像的图像参数之间的参数差值：
若参数差值包括在一个预设的差值范围内，则退出；
本发明的较佳的实施例中，所谓参数差值，是指对应于同一类图像参数，关联于屏幕图像的图像参数与关联于原始图像的图像参数之间的差值。例如，对应于R通道分量参数，关联于屏幕图像的R通道分量参数与关联于原始图像的R通道分量参数之间的差值。
本发明的较佳的实施例中，所谓差值范围，是指一个预设的使用者可以接受的图像失真范围，即使用者肉眼难以察觉的图像失真范围。具体地，若对应一类图像参数的参数差值落入上述预定的差值范围，则投影在投影屏幕上的屏幕图像与投影仪中的原始图像之间的差距比较微小，使用者通过肉眼难以分辨。本发明的较佳的实施例中，上述差值范围可以根据实际需求进行设定。
本发明的较佳的实施例中，当参数差值包括在上述预设的差值范围内时，则认为此时屏幕图像的失真程度在可接受的范围内，因此无需对投影参数进行相应调整，则可以直接退出。
本发明的一个较佳的实施例中，上述差值范围可以设定为0，则意味着只有当差值参数为0时，才认为屏幕图像的失真程度合格，即只有当屏幕图像与原始图像相同时才直接退出。
本发明的较佳的实施例中，在一次比较过程中，可以选择多类图像参数，或者一类图像参数中的多个图像参数进行比较，例如：
1)可以选择RGB颜色通道分量参数，以及色彩饱和度参数进行比较。则最终比较结果是RGB颜色通道分量参数与色彩饱和度参数的比较结果的 综合值，即只有在关联于RGB颜色通道分量参数的参数差值，以及关联于色彩饱和度参数的参数差值均落在上述差值范围内时，才认为此时不需要进行调整，并直接退出。
本发明的一个较佳的实施例中，对应一类图像参数，可以设定一个差值范围，则只有在关联于每类被比较的图像参数的参数差值均落在对应的差值范围内时，才认为此时不需要进行调整，并直接退出。
2)可以选择RGB颜色通道分量参数中的R通道分量参数以及G通道分量参数，同样只有在关联于R通道分量参数的参数差值，以及关联于G通道分量参数的参数差值均落在对应的差值范围内时，才认为此时不需要进行调整，并直接退出。
本发明的较佳的实施例中，可以根据实际情况灵活调整参与比较的图像参数的类别，以及每个类别中的子类别(例如RGB颜色通道分量参数中的R通道分量参数，和/或G通道分量参数，和/或B通道分量参数)，从而满足不同的投影调整精度的需求。
步骤S4，根据参数差值对投影仪中关联于投影原始图像的投影参数进行调整，并根据经过调整的投影参数将下一帧原始图像投影到对应的投影屏幕上，随后返回步骤S1。
本发明的较佳的实施例中，上述步骤S4中，以比较R通道分量参数为例，若根据参数差值分析表明屏幕图像的关联于R通道分量参数大于原始图像的关联于R通道分量参数，则说明原始图像投影到屏幕图像上之后，R通道分量参数增高了，则此时需要相应降低投影仪中的投影参数(降低关联于R通道参数分量的投影参数的增益)；反之，需要相应提高投影仪中的投影参数(提高关联于R通道参数分量的投影参数的增益)。
相应地，本发明的较佳的实施例中，若对多类或者多个子类的图像参数进行比较，则针对不同的参数差值，同时对相应的投影参数进行调整。
本发明的较佳的实施例中，投影仪根据经过调整的投影参数，向投影屏幕投射下一帧图像，并返回步骤S1，以继续监控屏幕图像的图像失真程度，直到图像失真程度满足需求为止。
本发明的一个较佳的实施例中，为了提升投影图像调整的精度，针对屏幕图像和原始图像，分别划分多个大小相等的像素块，例如以1*1为单位分 别将屏幕图像和原始图像划分成包括多个像素块。随后，上述步骤S3中，分别对每个关联于屏幕图像的像素块与相应的关联于原始图像的像素块进行比较，以得到对应每个像素块的参数差值并输出。换言之，将每个像素块当作一个独立的图像画面以进行独立比较，并输出对应每个像素块的参数差值。
因此，本发明的较佳的实施例中，如图2所示，上述步骤S4具体包括：
步骤S41，根据参数差值，对关联于投影原始图像的每个像素块的投影参数进行调整；
步骤S42，根据经过调整的所有像素块拼合原始图像并投影在投影屏幕上，随后返回步骤S1。
即本发明的较佳的实施例中，根据图像调整精度需求的提升，将原本整幅图像进行比较的过程演变为将图像划分为一个个小像素块并分别进行比较，从而大幅提升图像的调整精度。
本发明的较佳的实施例中，可以根据需求的图像调整精度，确定在一幅图像上划分的像素块的数量。
本发明的较佳的实施例中，上述划分像素块的方法可以应对在一个投影屏幕上具有多种背景色的情况，和/或在具有多种颜色的环境光的投影环境下保证投影的图像的图像质量。
综上所述，本发明技术方案中，采集当前播放帧的屏幕图像，并将其与投影仪中的相应帧的原始图像进行比较，以得到相应的图像参数之间的参数差值。根据参数差值对投影仪中相应的投影参数进行调整，并采用经过调整后的投影参数继续向投影屏幕投射下一帧图像，并同时继续监控下一帧屏幕图像的图像失真程度。上述过程循环往复，直至某一帧屏幕图像的图像失真程度满足需求(参数差值落在差值范围内)为止。上述技术方案能够弥补现有技术中无法针对不同的投影环境改变图像显示质量的问题，能够扩展投影屏幕选择的多样性，提升投影图像的图像质量的稳定性，从而提升使用者的观赏体验。
本发明的较佳的实施例中，上述投影图像调整方法可以适用于上述DLP投影系统中。同样地，本发明的其他实施例中，上述投影图像调整方法也可以适用于其他投影系统例如CRT投影系统或者LCD投影系统中。
本发明的较佳的实施例中，还提供一种投影仪，其中采用上述投影图像 调整方法。
以上所述仅为本发明较佳的实施例，并非因此限制本发明的实施方式及保护范围，对于本领域技术人员而言，应当能够意识到凡运用本发明说明书及图示内容所作出的等同替换和显而易见的变化所得到的方案，均应当包含在本发明的保护范围内。

Claims (7)

  1. 一种投影图像调整方法，其特征在于，于投影仪上安装一图像传感器，以获取对应的投影屏幕上显示的屏幕图像；
    所述投影图像调整方法具体包括：
    步骤S1，通过所述图像传感器采集得到当前帧的所述屏幕图像；
    步骤S2，将采集得到的当前帧的所述屏幕图像的至少一类图像参数与所述投影仪中保存的相应的一帧原始图像的相应的所述图像参数进行比较，幷输出比较结果；
    步骤S3，根据所述比较结果，判断所述屏幕图像的所述图像参数与所述原始图像的所述图像参数之间的参数差值：
    若所述参数差值包括在一个预设的差值范围内，则退出；
    步骤S4，根据所述参数差值对所述投影仪中关联于投影所述原始图像的投影参数进行调整，幷根据经过调整的所述投影参数将下一帧所述原始图像投影到对应的所述投影屏幕上，随后返回所述步骤S1。
  2. 如权利要求1所述的投影图像调整方法，其特征在于，所述图像参数的类别包括：
    RGB颜色通道分量参数；和/或
    伽马曲线参数；和/或
    直方图参数；和/或
    信噪比参数；和/或
    色彩饱和度参数；和/或
    亮度参数。
  3. 如权利要求1所述的投影图像调整方法，其特征在于，所述步骤S3中，根据对应至少一类所述图像参数的所述参数差值进行判断，幷根据对应至少一个所述参数差值对所述投影参数进行调整。
  4. 如权利要求1所述的投影图像调整方法，其特征在于，分别将所述屏幕图像和所述原始图像划分多个大小相等的像素块；
    所述步骤S3中，分别对每个关联于所述屏幕图像的所述像素块与相应的关联于所述原始图像的所述像素块进行比较，以得到对应每个所述像素块 的所述参数差值幷输出；
    所述步骤S4具体包括：
    步骤S41，根据所述参数差值，对关联于投影所述原始图像的每个所述像素块的所述投影参数进行调整；
    步骤S42，根据经过调整的所有所述像素块拼合所述原始图像幷投影在所述投影屏幕上，随后返回所述步骤S1。
  5. 如权利要求1所述的投影图像调整方法，其特征在于，所述步骤S3中，所述预设的差值范围为0；
    则所述步骤S3中，判断所述屏幕图像的所述图像参数与所述原始图像的所述图像参数之间的参数差值，幷在所述参数差值为0时，直接退出。
  6. 如权利要求1所述的投影图像调整方法，其特征在于，应用于数字光处理投影系统中。
  7. 一种投影仪，其特征在于，应用如权利要求1-6所述的投影图像调整方法。
PCT/CN2016/086621 2015-06-30 2016-06-21 一种投影图像调整方法及投影仪 WO2017000811A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510387029.4 2015-06-30
CN201510387029.4A CN106331665A (zh) 2015-06-30 2015-06-30 一种投影图像调整方法及投影仪

Publications (1)

Publication Number Publication Date
WO2017000811A1 true WO2017000811A1 (zh) 2017-01-05

Family

ID=57607837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/086621 WO2017000811A1 (zh) 2015-06-30 2016-06-21 一种投影图像调整方法及投影仪

Country Status (4)

Country Link
CN (1) CN106331665A (zh)
HK (1) HK1231655A1 (zh)
TW (1) TWI634792B (zh)
WO (1) WO2017000811A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107257453A (zh) * 2017-07-12 2017-10-17 上海斐讯数据通信技术有限公司 一种投影图像的颜色校准方法及系统
CN107659802A (zh) * 2017-11-10 2018-02-02 范永浩 户外投影仪
CN109192158A (zh) * 2018-09-21 2019-01-11 重庆惠科金渝光电科技有限公司 显示面板的控制方法、显示面板及存储介质
CN109831658A (zh) * 2019-04-03 2019-05-31 贵安新区新特电动汽车工业有限公司 投影光色调整方法及投影光色调整装置
CN113938568A (zh) * 2020-06-29 2022-01-14 先临三维科技股份有限公司 扫描仪的调整方法、装置、处理器和扫描系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007214752A (ja) * 2006-02-08 2007-08-23 Matsushita Electric Ind Co Ltd プロジェクターの自動台形歪調整方法
CN101507286A (zh) * 2006-08-17 2009-08-12 索尼爱立信移动通讯股份有限公司 投影仪的调整
CN102202199A (zh) * 2010-03-24 2011-09-28 鸿富锦精密工业（深圳）有限公司 投影仪及其影像调整方法
CN103108147A (zh) * 2013-02-05 2013-05-15 深圳市中科睿成智能科技有限公司 一种用于文字和图像投影显示的系统和方法
CN104639826A (zh) * 2013-11-08 2015-05-20 精工爱普生株式会社 显示装置、显示系统及控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100873231B1 (ko) * 2003-12-10 2008-12-10 닛본 덴끼 가부시끼가이샤 프로젝터의 색 보정 방법
CN102404533B (zh) * 2010-09-15 2016-06-15 罗普特（厦门）科技集团有限公司 投影仪及其投影画面色彩校正方法
CN102355567A (zh) * 2011-10-27 2012-02-15 王悦 一种自动偏色干扰处理方法
CN104869377B (zh) * 2012-03-14 2016-11-02 海信集团有限公司 一种投影图像颜色校正方法及投影仪
TWI504263B (zh) * 2013-03-22 2015-10-11 Delta Electronics Inc 投影系統、投影機及其校正方法
CN104104891B (zh) * 2013-04-10 2018-08-10 中强光电股份有限公司 投影装置及其投影自动校正方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007214752A (ja) * 2006-02-08 2007-08-23 Matsushita Electric Ind Co Ltd プロジェクターの自動台形歪調整方法
CN101507286A (zh) * 2006-08-17 2009-08-12 索尼爱立信移动通讯股份有限公司 投影仪的调整
CN102202199A (zh) * 2010-03-24 2011-09-28 鸿富锦精密工业（深圳）有限公司 投影仪及其影像调整方法
CN103108147A (zh) * 2013-02-05 2013-05-15 深圳市中科睿成智能科技有限公司 一种用于文字和图像投影显示的系统和方法
CN104639826A (zh) * 2013-11-08 2015-05-20 精工爱普生株式会社 显示装置、显示系统及控制方法

Also Published As

Publication number Publication date
TWI634792B (zh) 2018-09-01
TW201701654A (zh) 2017-01-01
CN106331665A (zh) 2017-01-11
HK1231655A1 (zh) 2017-12-22

Similar Documents

Publication Publication Date Title
WO2017000811A1 (zh) 一种投影图像调整方法及投影仪
AU2016373981B2 (en) Calibration of defective image sensor elements
US9769466B2 (en) Digital cinema projection method, optimization device and projection system
US11050988B2 (en) Device and method for shadow correction verification parameter determination and shadow correction verification
US20160269701A1 (en) Projection device, projection system and method for adjusting projection brightness of projection system
US11178367B2 (en) Video display apparatus, video display system, and luminance adjusting method of video display apparatus
US8605106B2 (en) Projector and color improvement method of the projector
US9330587B2 (en) Color adjustment based on object positioned near display surface
US20150138222A1 (en) Image processing device and multi-projection system
US8454171B2 (en) Method for determining a video capture interval for a calibration process in a multi-projector display system
DE102011009111A1 (de) Mehrschirm-Anzeigevorrichtung
JP6228469B2 (ja) 画像処理装置、画像処理方法、および画像投影装置
US20090141037A1 (en) System and method for optimizing display colors of a digital light processing projector
US10194122B2 (en) Method for controlling projector and projector applicable to same
JP5119607B2 (ja) プロジェクタ
CN108600719B (zh) 一种投影装置及其实时感测环境光亮度的方法
US10455204B2 (en) Display system and information processing method
US11146766B2 (en) Projection-type video display device
US10757381B2 (en) Image projection apparatus and its control method
KR101366329B1 (ko) 프로젝터 및 프로젝터의 영상 보정 방법
US10200662B2 (en) Color corrected images for projectors
CN110599551A (zh) 图像处理设备、图像处理方法和存储介质
JP2019179092A (ja) 黒レベル調整システム及び黒レベル調整方法
US20230028087A1 (en) Control apparatus, image projection system, control method, and storage medium
US20090256867A1 (en) Method and System for Generating Accurate Images for Display by an Image Display Device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16817175

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16817175

Country of ref document: EP

Kind code of ref document: A1