CN104935851A - Projection brightness adjusting method based on image analysis - Google Patents

Projection brightness adjusting method based on image analysis Download PDF

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CN104935851A
CN104935851A CN 201510353722 CN201510353722A CN104935851A CN 104935851 A CN104935851 A CN 104935851A CN 201510353722 CN201510353722 CN 201510353722 CN 201510353722 A CN201510353722 A CN 201510353722A CN 104935851 A CN104935851 A CN 104935851A
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projection
brightness
region
method
value
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CN 201510353722
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Chinese (zh)
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孙志君
方继广
唐猛
王国荣
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苏州市英富美欣科技有限公司
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Abstract

The invention discloses a projection brightness adjusting method based on image analysis. The method comprises the steps as follows: arranging a camera on a projector to shoot a projection picture of the projector; then extracting a projection region and a non-projection region from the projection picture; then respectively calculating an average brightness value of the projection region and an average brightness value of the non-projection region; dividing the average brightness values to obtain a contrast ratio between the projection region and the non-projection region; comparing the contrast ratio with a first threshold value which is set in advance and adjusting the projection brightness of the projector according to the comparison result. The method of the invention is simple in design and convenient for use. The method of the invention can automatically adjust the brightness so as to enable the comfort level of the human eyes to reach to highest level.

Description

一种基于图像分析的投影亮度调节方法 One kind of brightness adjustment based on the projected image analysis

技术领域 FIELD

[0001] 本发明涉及投影领域,尤其涉及一种基于图像分析的投影亮度调节方法。 [0001] The present invention relates to a projector, and more particularly relates to a projection image based on the brightness adjustment method of analysis.

背景技术 Background technique

[0002] 投影仪,在国家拉动内需的政策及人民收入不断提升的背景下,农村文化共享工程的实施进一步推动了中国投影机市场的快速增长。 [0002] projector, under the national policy of stimulating domestic demand and improve people's income and background, the implementation of rural culture sharing project to further promote the rapid growth of China's projector market. 据统计,2010年中国投影机市场出货量规模达到128万台,相比2009年增长43.6%。 According to statistics, in 2010 China's projector market shipments reached 1.28 million units, compared to 2009 increased by 43.6%. 分析认为,2011年中国投影机市场仍将保持快速增长,全年出货量将达到167万台,年成长率约投影仪为30%。 Analysts believe that in 2011 China's projector market will maintain rapid growth, annual shipments will reach 1.67 million units, annual growth rate of about 30% of the projector. 未来5年,中国投影机市场的复合增长率将达到17.1%。 The next five years, the compound growth rate of China's projector market will reach 17.1%.

[0003]中国投影机产品消费市场主要集中在经济较发达的华北、华东、华南等大中型城市。 [0003] China's projector market consumer products mainly concentrated in the economically more developed and medium-sized cities north, east and south China. 教育、商务、政府、家庭娱乐是支撑中国投影机行业的四大主要消费群体。 Education, business, government, home entertainment projector industry is supporting China's four major consumer groups. 纵观中国投影机市场。 Throughout China's projector market. 无论是从产品的数量、质量还是品种方面,都达到了一定的成熟程度,产品的普及应用使投影机在用户的心理定位从较为专业的显示设备向大众产品转变,行业的销售规模不断扩大,2010年,中国投影机市场销售量为110万台,相比2009年增长37.5%。 Whether it is in terms of the number of products, quality and variety, have reached a certain level of maturity, the universal application of the product allows the projector to shift to mass products from more specialized display device in psychological orientation of users, sales volume of the industry continues to expand, In 2010, China's projector market sales of 110 million units, an increase of 37.5% compared to 2009. 从这十年中国投影机市场发展情况来看,中国投影机市场规模增长18倍,其年均增长率为39.14%,行业处于高速发展期。 From this decade China's projector market development point of view, China's projector market grew 18 times its average annual growth rate of 39.14 percent, the industry is in rapid development period.

[0004] 从行业未来的发展形式来看,教育仍是行业未来发展支柱领域。 [0004] From the form of future development of the industry point of view, education is still the pillars of the future development of the industry. 根据统计数字,2010年全国共有幼儿园12.91万所,小学39.42万所、普通中学7.90万所,普通中等院校3047所,高等教育学校1778所,按每个教室配备一台投影机计算,据相关数据显示中国仅教育行业市场容量就达1100万台以上,如果按照投影占有率计算的话,投影机可占14%-28%左右(不包括市场保有量),而2010年教育市场实销量却还不到50万台。 According to statistics, in 2010 there were 129,100 kindergartens, primary schools 394 200, 79 000 general secondary schools, 3047 general secondary schools, higher education schools 1778, each classroom is equipped with a projector computing, according to the relevant data show that China only education industry market capacity reached more than 11 million units, if calculated in accordance with the words of the projected share, the projector can account for about 14% -28% (not including market holdings), while sales in the education market in 2010 are still real less than 50 million units.

[0005] 其次,商用投影市场的发展也是左右投影机市场发展的关键力量。 [0005] Second, the development of the business projector market is the key market forces around the development of projectors. 虽然中国商务投影市场已经在迅速扩展,但据相关调研机构预计,在未来,中小企业数量将保持7%-8%的增长率,2012年中小企业总数将达到5000万家,行业发展前景无限。 Although the Chinese business projector market has been expanding rapidly, but according to the relevant research institutions is expected in the future, the number of SMEs will remain 7% -8% growth rate in 2012 will reach 50 million the total number of SMEs, industry unlimited prospects. 另外,就目前国内而言,资产百万以上的富裕家庭数量可以达到200多万家,一些精英、白领对于生活的质量、娱乐设备的需求较大,未来家用市场潜力巨大。 In addition, the terms of the current domestic assets of more than one million the number of wealthy families can reach more than two million, some of the elite, white-collar workers for quality of life, greater demand entertainment devices, the future of the huge domestic market potential.

[0006] 现有的投影仪按照应用环境分为以下几类: [0006] The projector according to a conventional application environment is divided into the following categories:

1、家庭影院型:其特点是亮度都在2000流明左右(随着投影的发展这个数字在不断的增大,对比度较高),投影的画面宽高比多为16:9,各种视频端口齐全,适合播放电影和高清晰电视,适于家庭用户使用。 1, a home theater type: characterized in brightness of about 2000 lumens (With the projected increase in this number is constantly higher contrast), the projection screen aspect ratio are 16: 9, various video port complete, suitable for playing movies and high-definition television for home users.

[0007] 2、便携商务型投影仪:一般把重量低于2公斤的投影仪定义为商务便携型投影仪,这个重量跟轻薄型笔记本电脑不相上下。 [0007] 2, portable business type projector: Usually the defined weight of less than 2 kg the projector is portable business projector, this weight comparable with thin notebooks. 商务便携型投影仪的优点有体积小、重量轻、移动性强,是传统的幻灯机和大中型投影仪的替代品,轻薄型笔记本电脑跟商务便携型投影仪的搭配,是移动商务用户在进行移动商业演示时的首选搭配。 The advantage of a portable projector business small size, light weight, highly mobile, a conventional slide projector and alternatives, thin and light notebooks with a projector for business with medium-sized portable projector, the user is performing mobile commerce with the first choice when the mobile business presentations.

[0008] 3、教育会议型投影仪:一般定位于学校和企业应用,采用主流的分辨率,亮度在2000-3000流明左右,重量适中,散热和防尘做的比较好,适合安装和短距离移动,功能接口比较丰富,容易维护,性能价格比也相对较高,适合大批量采购普及使用。 [0008] 3, & Education Projector: general applications targeted at schools and businesses, with the mainstream resolution, brightness at about 2000-3000 lumens, moderate weight, heat and dust do better, suitable for installation and short distance mobile, rich functional interface, easy to maintain, cost performance is relatively high for bulk purchases universal use.

[0009] 4、主流工程型投影仪:相比主流的普通投影仪来讲,工程投影仪的投影面积更大、距离更远、光亮度很高,而且一般还支持多灯泡模式,能更好的应付大型多变的安装环境,对于教育、媒体和政府等领域都很适用。 [0009] 4, Mainstream project type projector: compared to ordinary projectors mainstream in terms of a larger instrument projectors projected area, farther, high brightness, and generally also supports multi-lamp mode, better to cope with large-scale installation of the changing environment for the areas of education, media and government are applicable.

[0010] 5、专业剧院型投影仪:这类投影仪更注重稳定性,强调低故障率,其散热性能、网络功能、使用的便捷性等投影仪方面做得很强。 [0010] 5, professional theater type projector: pay more attention to the stability of these projectors, emphasizing low failure rate, its thermal performance aspects of the projector, network functionality, ease of use and the like is made very strong. 当然,为了适应各种专业应用场合,影仪最主要的特点还是其高亮度,其亮度一般可达5000流明以上,高者可超10000流明。 Of course, in order to meet a variety of professional applications, the most important feature of projectors is its high brightness, brightness up to 5,000 lumens general, the higher may exceed 10,000 lumens. 由于体积庞大,重量重,通常用在特殊用途,例如剧院、博物馆、大会堂、公共区域,还可应用于监控交通、公安指挥中心、消防和航空交通控制中心等环境。 As the bulky, heavy weight, often used in special applications, such as theaters, museums, City Hall, public areas, and also for monitoring traffic, public security command center, fire and air traffic control centers and other environments.

[0011] 6、测量投影仪:这类投影仪不同于以上几类投影仪,早期称轮廓投影仪,随着光栅尺的普及,投影仪都安装上高精度的光栅尺,人们便又叫测量投影仪(或投影仪,如国内较著名的测量投影仪有高诚公司生产的CPJ-3015),为与传统的投影仪区别开,这类投影仪便称为测量投影仪。 [0011] 6, measuring projector: This projector differs from the projector above categories, called profile projector earlier, with the popularity, the projector is installed on the grating of the grating with high accuracy, it will be called measurement projector (or projectors, as more domestic famous Crosby measuring projector has produced CPJ-3015), is open to traditional projector difference, these projectors will be called measuring projector. 其作用主要是将产品零件通过光的透射形成放大的投影仪,然后用标准胶片或光栅尺等确定产品的尺寸。 Its main function is to form a transmission part products amplified by the projector light, and then using standard film or the like to determine scale size of the product. 由于工业化的发展,这种测量投影仪已经成为制造业最常用的检测仪器之一。 Due to the development of industrialization, this measurement projectors have become one of the most commonly used testing equipment manufacturing. 按期投影的方式分为立式投影仪和卧式投影仪。 The projected schedule is divided into horizontal and vertical projector projector. 按其比对的标准不同又分为轮廓投影仪和数字式投影仪。 Their alignment is divided into different standard profile projector and the digital projector.

[0012] 然而,上面的几种投影仪一般都需要人手动调整投影亮度,非常不方便。 [0012] However, the above several projectors generally require people to manually adjust the brightness of the projection, is very inconvenient.

发明内容 SUMMARY

[0013] 本发明所要解决的技术问题是针对背景技术中所涉及到的问题,提供一种基于图像分析的投影亮度调节方法。 [0013] The present invention solves the technical problem is for problems involved in the background art is provided a method of brightness adjustment based on the projection image analysis.

[0014] 本发明为解决上述技术问题采用以下技术方案: [0014] The present invention employs the following technical solution to solve the above problems:

一种基于图像分析的投影亮度调节方法,包含以下具体步骤: One kind of brightness adjustment based on the projection image analysis method, comprising the following specific steps:

步骤1),在投影仪上设置摄像头,以拍摄投影仪的投影画面; Step 1), a camera is provided on the projector, the projector to capture the projection screen;

步骤2),从投影画面中提取投影区域和非投影区域; Step 2), and extracting the non-projection region from the projection region of the projection image;

步骤3),分别计算投影区域的平均亮度值和非投影区域的平均亮度值; Step 3), the average luminance value and the average luminance value of the non-projection region of the projection area were calculated;

步骤4),将投影区域的平均亮度值除以非投影区域的平均亮度值,取得其对比度; Step 4), the average brightness of the projected area divided by the average luminance value of the non-projection region, the contrast achieved;

步骤5),将投影画面图像中投影区域和非投影区域之间的对比度与预先设定的第一阈值进行比较; Step 5), the contrast between the image projection screen and the projection area of ​​non-projection region and the first threshold value set in advance are compared;

步骤5.1),若投影画面图像中投影区域和非投影区域之间的对比度小于预先设定的第一阈值,则调大投影仪的投影亮度,直至投影画面图像中投影区域和非投影区域之间的对比度等于预设的第一阈值或投影仪的投影亮度达到最大值; Step 5.1), if the contrast between the screen image and the projection area of ​​non-projection area is smaller than a first threshold value set in advance, the large projection brightness adjusting a projector, until the region between the projection and non-projection region of the projection screen image It contrasts equal to a preset threshold value or a first projection projector maximum brightness;

步骤5.2),若投影画面图像中投影区域和非投影区域之间的对比度大于预先设定的第一阈值,则调小投影仪的投影亮度,直至投影画面图像中投影区域和非投影区域之间的对比度等于预设的第一阈值或投影仪的投影亮度达到最小值。 Step 5.2), if the contrast between the screen image and the projection area of ​​non-projection area is larger than a first threshold value set in advance, the small projection brightness adjusting a projector, until the region between the projection and non-projection region of the projection screen image contrast equal to a preset threshold value or a first projection projector brightness reaches a minimum.

[0015] 作为本发明一种基于图像分析的投影亮度调节方法进一步的优化方案,所述摄像头采用针孔摄像头。 [0015] The present invention is based on the analysis of the projected image brightness adjustment further optimization scheme, the camera with a pinhole camera.

[0016] 作为本发明一种基于图像分析的投影亮度调节方法进一步的优化方案,所述针孔摄像头的型号为SN-319W2。 [0016] The present invention is based on the analysis of the projected image brightness adjustment further optimization scheme, the pinhole camera model SN-319W2.

[0017] 作为本发明一种基于图像分析的投影亮度调节方法进一步的优化方案,所述第一阈值的范围为500至3000。 [0017] The present invention is based on the analysis of the projected image brightness adjustment further optimization scheme, the first threshold value range is 500-3000.

[0018] 作为本发明一种基于图像分析的投影亮度调节方法进一步的优化方案,所述第一阈值为1500。 [0018] The present invention is based on the analysis of the projected image brightness adjustment further optimization scheme, the first threshold is 1500.

[0019] 本发明采用以上技术方案与现有技术相比,具有以下技术效果: [0019] With the above aspect of the present invention compared with the prior art, it has the following technical effects:

1.设计简单,使用方便; 1. The design is simple, easy to use;

2.能够自动调节亮度,使得人眼的舒适性达到最大。 2 can automatically adjust the brightness, so that the comfort of the human eye is maximized.

具体实施方式 detailed description

[0020] 下面对本发明的技术方案做进一步的详细说明: [0020] The following further detailed description of the technical solution of the present invention:

本发明公开了一种基于图像分析的投影亮度调节方法, The present invention discloses a method of analysis based on the projection image brightness adjusting method,

一种基于图像分析的投影亮度调节方法,包含以下具体步骤: One kind of brightness adjustment based on the projection image analysis method, comprising the following specific steps:

步骤1),在投影仪上设置摄像头,以拍摄投影仪的投影画面; Step 1), a camera is provided on the projector, the projector to capture the projection screen;

步骤2),从投影画面中提取投影区域和非投影区域; Step 2), and extracting the non-projection region from the projection region of the projection image;

步骤3),分别计算投影区域的平均亮度值和非投影区域的平均亮度值; Step 3), the average luminance value and the average luminance value of the non-projection region of the projection area were calculated;

步骤4),将投影区域的平均亮度值除以非投影区域的平均亮度值,取得其对比度; Step 4), the average brightness of the projected area divided by the average luminance value of the non-projection region, the contrast achieved;

步骤5),将投影画面图像中投影区域和非投影区域之间的对比度与预先设定的第一阈值进行比较; Step 5), the contrast between the image projection screen and the projection area of ​​non-projection region and the first threshold value set in advance are compared;

步骤5.1),若投影画面图像中投影区域和非投影区域之间的对比度小于预先设定的第一阈值,则调大投影仪的投影亮度,直至投影画面图像中投影区域和非投影区域之间的对比度等于预设的第一阈值或投影仪的投影亮度达到最大值; Step 5.1), if the contrast between the screen image and the projection area of ​​non-projection area is smaller than a first threshold value set in advance, the large projection brightness adjusting a projector, until the region between the projection and non-projection region of the projection screen image It contrasts equal to a preset threshold value or a first projection projector maximum brightness;

步骤5.2),若投影画面图像中投影区域和非投影区域之间的对比度大于预先设定的第一阈值,则调小投影仪的投影亮度,直至投影画面图像中投影区域和非投影区域之间的对比度等于预设的第一阈值或投影仪的投影亮度达到最小值。 Step 5.2), if the contrast between the screen image and the projection area of ​​non-projection area is larger than a first threshold value set in advance, the small projection brightness adjusting a projector, until the region between the projection and non-projection region of the projection screen image contrast equal to a preset threshold value or a first projection projector brightness reaches a minimum.

[0021] 所述摄像头采用针孔摄像头,型号为SN-319W2。 The [0021] camera with a pinhole camera, Model SN-319W2.

[0022] 所述第一阈值的范围为500至3000,优先采用1500。 Range [0022] The first threshold value is from 500 to 3000, 1500 precedence.

[0023] 本技术领域技术人员可以理解的是,除非另外定义,这里使用的所有术语(包括技术术语和科学术语)具有与本发明所属领域中的普通技术人员的一般理解相同的意义。 [0023] skilled in the art will be appreciated that, unless otherwise defined, all terms (including technical and scientific terms) have the general understanding in the art the present invention belongs to one of ordinary skill in the same meaning. 还应该理解的是,诸如通用字典中定义的那些术语应该被理解为具有与现有技术的上下文中的意义一致的意义,并且除非像这里一样定义,不会用理想化或过于正式的含义来解释。 It should also be understood that generic terms, such as those defined in the dictionary should be understood as meaning that is consistent with significance in the context of the prior art, and unless the same as defined here, not idealized or overly formal sense Explanation.

[0024] 以上所述的具体实施方式,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施方式而已,并不用于限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0024] The foregoing specific embodiments, objectives, technical solutions, and advantages of the invention will be further described in detail, it should be understood that the above descriptions are merely specific embodiments of the present invention, but not to limit the the present invention, within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc., should be included within the scope of the present invention.

Claims (5)

  1. 1.一种基于图像分析的投影亮度调节方法,其特征在于,包含以下具体步骤: 步骤1),在投影仪上设置摄像头,以拍摄投影仪的投影画面; 步骤2),从投影画面中提取投影区域和非投影区域; 步骤3),分别计算投影区域的平均亮度值和非投影区域的平均亮度值; 步骤4),将投影区域的平均亮度值除以非投影区域的平均亮度值,取得其对比度; 步骤5),将投影画面图像中投影区域和非投影区域之间的对比度与预先设定的第一阈值进行比较; 步骤5.1),若投影画面图像中投影区域和非投影区域之间的对比度小于预先设定的第一阈值,则调大投影仪的投影亮度,直至投影画面图像中投影区域和非投影区域之间的对比度等于预设的第一阈值或投影仪的投影亮度达到最大值; 步骤5.2),若投影画面图像中投影区域和非投影区域之间的对比度大于预先设定的第一阈 CLAIMS 1. A method of brightness adjustment based on the projection image analysis, characterized in that it comprises the following specific steps: Step 1), the projector disposed on the camera to capture the projection screen of the projector; step 2), to extract from the projection screen non-projection region and the projection region; step 3), calculates the average luminance value and the average luminance value of the projection area of ​​non-projection region; step 4), the average luminance value of the projected area divided by the average luminance value non-projection region acquires the contrast; step 5), the contrast between the image projection screen and the projection area of ​​non-projection region and the first threshold value set in advance; step 5.1), when the projection screen between the projection area of ​​the image and the non-projection region contrast than the first threshold value set in advance, the large projection brightness adjusting a projector, a projection screen until the contrast between the image area and the non-projection area is equal to a first predetermined threshold value luminance projector or a projector maximum value; step 5.2), if the contrast between the image projection screen and the projection area of ​​non-projection area is larger than a first predetermined threshold 值,则调小投影仪的投影亮度,直至投影画面图像中投影区域和非投影区域之间的对比度等于预设的第一阈值或投影仪的投影亮度达到最小值。 Value, then adjust the brightness of the projector small projector, the projection screen until the contrast between the image area and the non-projection area is equal to a first predetermined threshold value luminance projector or a projector reaches a minimum.
  2. 2.根据权利要求1所述的基于图像分析的投影亮度调节方法,其特征在于,所述摄像头采用针孔摄像头。 The brightness adjustment based on the projected image analysis method according to claim 1, wherein said camera uses a pinhole camera.
  3. 3.根据权利要求2所述的基于图像分析的投影亮度调节方法,其特征在于,所述针孔摄像头的型号为SN-319W2。 The brightness adjustment based on the projected image analysis method according to claim 2, characterized in that the pinhole camera model SN-319W2.
  4. 4.根据权利要求1所述的基于图像分析的投影亮度调节方法,其特征在于,所述第一阈值的范围为500至3000。 The brightness adjustment based on the projected image analysis method according to claim 1, wherein the first threshold range is 500-3000.
  5. 5.根据权利要求4所述的基于图像分析的投影亮度调节方法,其特征在于,所述第一阈值为1500。 The brightness adjustment based on the projected image analysis method according to claim 4, wherein the first threshold is 1500.
CN 201510353722 2015-06-25 2015-06-25 Projection brightness adjusting method based on image analysis CN104935851A (en)

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CN101507286A (en) * 2006-08-17 2009-08-12 索尼爱立信移动通讯股份有限公司 Projector adaptation
CN104243881A (en) * 2014-09-08 2014-12-24 陆俊 Projection control method and system of projector
CN104363399A (en) * 2014-10-11 2015-02-18 苏州合欣美电子科技有限公司 Projection angle adjustment method of adaptive projection system
CN204302648U (en) * 2014-12-01 2015-04-29 苏州芯创智汇电子科技有限公司 Projector brightness and color automatic adjusting system based on camera
CN104618671A (en) * 2015-01-26 2015-05-13 联想(北京)有限公司 Information processing method and electronic device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101507286A (en) * 2006-08-17 2009-08-12 索尼爱立信移动通讯股份有限公司 Projector adaptation
CN104243881A (en) * 2014-09-08 2014-12-24 陆俊 Projection control method and system of projector
CN104363399A (en) * 2014-10-11 2015-02-18 苏州合欣美电子科技有限公司 Projection angle adjustment method of adaptive projection system
CN204302648U (en) * 2014-12-01 2015-04-29 苏州芯创智汇电子科技有限公司 Projector brightness and color automatic adjusting system based on camera
CN104618671A (en) * 2015-01-26 2015-05-13 联想(北京)有限公司 Information processing method and electronic device

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