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文档模板Lastupdated:1/4/20204:58AMPage1of10Copyright@2011-2015,天津铂创国茂电子科技发展有限公司版权所有.Thematerialinthisdocumentconstitutesanunpublishedworkcreatedin2011.TheuseofthiscopyrightnoticeisintendedtoprovidenoticethatTianjinBotroownsacopyrightinthisunpublishedwork.Thecopyrightnoticeisnotanadmissionthatpublicationhasoccurred.Thisworkcontainsconfidential,proprietaryinformationandtradesecretsofTianjinBotro.Nopartofthisdocumentmaybeused,reproduced,ortransmittedinanyformorbyanymeanswithoutthepriorwrittenpermissionofTianjinBotro。基于区域匹配的图像白平衡调整ZhouMiRevision1.0错误!未找到引用源。WARNINGThisdocumentcontainsconfidentialinformationthatcouldbesubstantiallydetrimentaltotheinterestofTianjinBotroElectronicalTechCo.,Ltdthroughunauthorizeduseordisclose.文档模板Lastupdated:1/4/20204:58AMPage2of10Copyright@2011-2015,天津铂创国茂电子科技发展有限公司版权所有.Thematerialinthisdocumentconstitutesanunpublishedworkcreatedin2011.TheuseofthiscopyrightnoticeisintendedtoprovidenoticethatTianjinBotroownsacopyrightinthisunpublishedwork.Thecopyrightnoticeisnotanadmissionthatpublicationhasoccurred.Thisworkcontainsconfidential,proprietaryinformationandtradesecretsofTianjinBotro.Nopartofthisdocumentmaybeused,reproduced,ortransmittedinanyformorbyanymeanswithoutthepriorwrittenpermissionofTianjinBotro。TableOfContents1OpenIssues.................................................................................................................31.1OpenFeatureIssues...............................................................................................31.2OpenImplementationIssues...................................................................................32引言...............................................................................................................................43需求分析........................................................................................................................53.1子区域匹配...............................................................................................................53.2白平衡调整..............................................................................................................84附录.............................................................................................................................105RevisionChanges.....................................................................................................11文档模板Lastupdated:1/4/20204:58AMPage3of10Copyright@2011-2015,天津铂创国茂电子科技发展有限公司版权所有.Thematerialinthisdocumentconstitutesanunpublishedworkcreatedin2011.TheuseofthiscopyrightnoticeisintendedtoprovidenoticethatTianjinBotroownsacopyrightinthisunpublishedwork.Thecopyrightnoticeisnotanadmissionthatpublicationhasoccurred.Thisworkcontainsconfidential,proprietaryinformationandtradesecretsofTianjinBotro.Nopartofthisdocumentmaybeused,reproduced,ortransmittedinanyformorbyanymeanswithoutthepriorwrittenpermissionofTianjinBotro。1OpenIssuesListallopenissues.Includeshortdescriptionofresolutionwhenclosed.Thisshouldnotbedetailed.1.1OpenFeatureIssues1)Issue:Resolution:2)Issue:Resolution:3)Issue:Resolution:1.2OpenImplementationIssues1)Issue:Resolution:2)Issue:Resolution:文档模板Lastupdated:1/4/20204:58AMPage4of10Copyright@2011-2015,天津铂创国茂电子科技发展有限公司版权所有.Thematerialinthisdocumentconstitutesanunpublishedworkcreatedin2011.TheuseofthiscopyrightnoticeisintendedtoprovidenoticethatTianjinBotroownsacopyrightinthisunpublishedwork.Thecopyrightnoticeisnotanadmissionthatpublicationhasoccurred.Thisworkcontainsconfidential,proprietaryinformationandtradesecretsofTianjinBotro.Nopartofthisdocumentmaybeused,reproduced,ortransmittedinanyformorbyanymeanswithoutthepriorwrittenpermissionofTianjinBotro。2引言数字视频在LCD、LCOS和大屏电视墙显示时,由于液晶分子本身固有的物理性质所造成的特殊光电效应、荧光管亮度不足、数模转换存在噪声、子屏幕显示特性不同以及屏幕老化等因素会造成图像误差和扭曲,加上用户的视觉调节和测试需求,往往需要对图像颜色加以校正。本课题根据数字视频显示原理,提出了一种对彩色图像分区域匹配后进行白平衡调整的方法。文档模板Lastupdated:1/4/20204:58AMPage5of10Copyright@2011-2015,天津铂创国茂电子科技发展有限公司版权所有.Thematerialinthisdocumentconstitutesanunpublishedworkcreatedin2011.TheuseofthiscopyrightnoticeisintendedtoprovidenoticethatTianjinBotroownsacopyrightinthisunpublishedwork.Thecopyrightnoticeisnotanadmissionthatpublicationhasoccurred.Thisworkcontainsconfidential,proprietaryinformationandtradesecretsofTianjinBotro.Nopartofthisdocumentmaybeused,reproduced,ortransmittedinanyformorbyanymeanswithoutthepriorwrittenpermissionofTianjinBotro。3需求分析基于区域匹配的图像白平衡调整根据颜色调节需要将一帧图像分为多个不同的子区域,并对这些子区域执行不同的调整方法。要求子区域形状为矩形且可相互重叠,大小和数目可以根据用户需要而改变,只要这些子区域大小没有超过当前显示屏幕最大尺寸,数目没有超过系统存储器数目所支持的最大校正数目,对同一子区域R、G、B各个颜色通道的校正相互独立、方法相同,并充分考虑各个子区域不同的白平衡调整参数。调整后的图像在在空间上彼此衔接,形成一幅稳定、完整的图像。3.1子区域匹配颜色校正方法通常可以分为两类:1)基于图像设备的校正方法,通过确定源颜色空间到目标颜色空间的映射关系实现颜色空间转换,其中的代表方法是矩阵法、查表法、多项式回归法和人工神经网络法,这类方法常用于确定图像输入输出设备的前提下;2)基于图像分析的校正方法,一方面可以利用色度均值和分布特性根据自身需要进行自校正,另一方面可以指定参考图像,其他待校正图像的颜色风格都要与其一致,通常采用统计信息或区域信息作为校正信息进行准确的校正。本课题采用用户根据自己视觉调节需求指定的子区域信息作为校正信息,进行准确的白平衡调整,主要需要完成子区域位置信息存储以及子区域匹配。根据数字视频显示的原理,首先将用户需要调整的子区域,按照其在视频显示过程中出现顺序,由先到后排列,然后将这些子区域各自的起始、终止位置信息,按照其排列顺序由先到后依次存储在对应的起始、终止位置存储器中。在视频显示过程中,利用场信号(f_in)、行扫描信号(h_in)、列扫描信号(v_in)以及行(col)、列(row)计数信号,很容易得到屏幕中各行、列信息col、row
本文标题:基于区域匹配的图像白平衡调整
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