CN101990045A - 数字图像检测系统及方法 - Google Patents

数字图像检测系统及方法 Download PDF

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CN101990045A
CN101990045A CN200910304970XA CN200910304970A CN101990045A CN 101990045 A CN101990045 A CN 101990045A CN 200910304970X A CN200910304970X A CN 200910304970XA CN 200910304970 A CN200910304970 A CN 200910304970A CN 101990045 A CN101990045 A CN 101990045A
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伍文一
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ChunAn Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Abstract

一种数字图像检测方法,用于检测一具有照相功能的电子设备所拍摄的图片,包括以下步骤:读取所述电子设备拍摄的图片;检测所述图片是否有黑边;如果没有黑边,则输出无黑边的测试结果;如果有黑边,检测所述黑边内各个像素点的值;如果黑边内各个像素点的值相同,则输出是成像软件原因导致黑边的测试结果;及如果黑边内各个像素点的值不同,则输出是机构原因导致黑边的测试结果。本发明数字图像检测方法可检测出电子图像的黑边的产生原因,测试准确度高。

Description

数字图像检测系统及方法
技术领域
本发明涉及一种检测系统及方法,特别是一种数字图像检测系统及方法。
背景技术
目前带有照相功能的移动电子设备(如手机、个人数位助理、笔记本电脑等)越来越多,像素越来越高,所以对上述电子设备的照相功能的检测精度要求也越来越高。在检测上述电子设备的照相功能时,发现某些照相功能不佳的电子设备拍摄的电子图像存在黑边,经分析,黑边的形成原因大致有如下两种:
一、因为机构设计的问题导致固定照相模组的治具、外壳或其他机构件挡住了相机的镜头边缘;或者由于组装时的操作不当,将机构件挡在了镜头上。机构问题导致的黑边内各个像素点的RGB值(Red,Green,blue,红绿蓝,RGB值又称颜色值)十分接近黑色的RGB值,但是黑边内的各个像素点的RGB值并不相同。
二、拍摄图像后软件处理时对图像的尺寸计算错误。由于成像软件计算错误造成的黑边内的每个像素点的RGB值相同,并十分接近黑色的RGB值。
但是现在并没有一种专门检测黑边的方法,而是通过其他的如污点测试、阴影测试等来测试,但是这样做漏检率非常大,而且不能准确的检测出是何种原因导致的黑边。
发明内容
鉴于以上内容,有必要提供一种能检测出是否有黑以及产生黑边原因的电子图像检测系统及方法。
一种数字图像检测方法,用于检测一具有照相功能的电子设备所拍摄的图片,包括以下步骤:读取所述电子设备拍摄的图片;检测所述图片是否有黑边;如果没有黑边,则输出无黑边的测试结果;如果有黑边,检测所述黑边内各个像素点的值;如果黑边内各个像素点的值相同,则输出是成像软件原因导致黑边的测试结果;及如果黑边内各个像素点的值不同,则输出是机构原因导致黑边的测试结果。
一种数字图像检测系统,包括一检测设备及一具照相功能的电子设备,所述检测设备包括一图片读取模组、一像素点值读取模组、一比较模组及一测试结果输出模组,所述图片读取模组读取所述电子设备拍摄的图片,所述像素点值读取模组读取所述图片边缘的像素点值,所述比较模组将所述图片边缘的像素点值与一参考值作比较从而检测出图片是否有黑边,如果有黑边,所述比较模组比较黑边内的各个像素点的值是否相同从而检测出产生黑边的原因,所述检测结果输出模组输出是否有黑边及产生黑边原因的测试结果。根据各像素点的值的情况输出对应的导致黑边成因的测试结果。
相较于现有技术,本发明数字图像检测系统及方法利用可以检测出是否有黑边,并检测出产生黑边的原因,测试准确率提高,以便于根据正确原因改善图片质量。
附图说明
图1是本发明较佳实施方式数字图像检测系统的组成图。
图2及是本发明较佳实施方式数字图像检测方法的流程图。
图3是图2中步骤S03的流程图。
具体实施方式
请参阅图1,本发明较佳实施方式数字图像检测系统包括一电子设备10及一检测设备20。所述电子设备10包括一照相模组12及一可存储所述照相模组12拍摄的图片的存储模组14。所述检测设备20可读取所述电子设备10拍摄的图片并检测该图片是否有黑边以及产生黑边的原因。
所述检测设备20包括一图片读取模组21,一像素点值读取模组22(像素点值包括像素点的RGB值及灰度值)、一运算模组23、一图片转化模组24、一比较模组25及一测试结果输出模组26。
检测所述图片时,所述图片读取模组21读取所述电子设备10拍摄的图片,所述像素点值读取模组22读取所述图片各像素点的RGB值,所述运算模组23将所述RGB值换算为灰度值,所述图片转化模组24在所述运算模组23将RGB值换算为灰度值后将所述图片转化成灰度图。
下面介绍灰度值的计算方法,任何颜色都由红、绿、蓝三原色(RGB)组成,如某像素点的RGB值为RGB(R,G,B),可以通过下面几种方法,将其转换为灰度值(Gray):
浮点算法:Gray=R*0.3+G*0.59+B*0.11;
整数方法:Gray=(R*30+G*59+B*11)/100;
平均值法:Gray=(R+G+B)/3;
仅取绿色:Gray=G。
通过上述任一种方法求得灰度值后,将原来像素点的RGB值换算成灰度值(Gray),而后形成新的RGB值RGB(Gray,Gray,Gray),用新的RGB值RGB(Gray,Gray,Gray)替换原来的RGB值RGB(R,G,B)就是灰度图了。在此,将所述图片转化为灰度图,可加快后继运算速度。
所述比较模组25可将所述灰度图各边缘(上下左右)的各像素点的灰度值的平均值与一参考值作比较,该参考值为一接近0的灰度值(黑色的灰度值为(0,0,0)),当所述灰度图各边缘的各像素点的灰度值的平均值小于所述参考值时,表示图片的边缘可能为黑色(灰度值越小越接近黑色),则继续检测该边缘的相邻边的灰度值的平均值,直到灰度值的平均值大于所述参考值为止,该处与灰度图的边界处的距离即为黑边的宽度
所述比较模组25将黑边内的各个像素点的灰度值作比较,如果各个像素点的灰度值相同,所述测试结果输出模组26输出是成像软件原因导致黑边的测试结果。如果各个像素点的灰度值不同,则所述测试结果输出模组26输出是机构原因导致黑边的测试结果。测试人员可根据测试结果修改成像软件或改正电子设备10的机构,以消除图像黑边,改善图片质量。
请参阅图2,一种数字图像检测方法,利用所述检测设备20检测所述电子设备10所拍摄的图片,包括以下步骤:
S01:所述电子设备10的照相模组12拍摄照片并存储于其存储模组14内;
S02:所述检测设备20的图片读取模组21从所述电子设备10的存储模组14内读取所述图片;
S03:检测所述图片是否有黑边;
S04:如果有黑边,所述检测设备20的比较模组25比较所述黑边内的各个像素点值(RGB值或灰度值)是否相同;
S05:如果黑边内的各个像素点值相同,所述检测设备20的测试结果输出模组26输出是成像软件原因导致黑边的测试结果;
S06:如果黑边内各个像素点值不同,所述检测设备20的测试结果输出模组26输出是机构原因导致黑边的测试结果;及
S07:如果在步骤S03,检测到没有黑边,则输出无黑边的测试结果。
请参阅图3,所述检测图片是否有黑边的步骤(S03)进而包括以下步骤:
S31:将待测图片转化为灰度图;
S32:分别检测所述灰度图上下左右边缘的灰度值的平均值;
S33:所述比较模组25将所述灰度值的平均值与一参考值(接近0)作比较,以判断所述图片边缘的灰度平均值是否小于所述参考值;
S34:如果小于所述参考值,则继续检测所述边缘的相邻边的灰度值的平均值,然后返回步骤S33,直到检测到的灰度值的平均值大于所述参考值为止;
S35:当所述灰度值的平均值大于所述参考值时,计算黑边的宽度;
S36:判断所述黑边的宽度是否为0;
S37:如果所述黑边的宽度为0,则表示图片黑边测试通过(无黑边)。
S38:如果所述黑边的宽度大于0,则表示图片黑边测试不通过(有黑边)。

Claims (11)

1.一种数字图像检测方法,用于检测一具有照相功能的电子设备所拍摄的图片,包括以下步骤:
读取所述电子设备拍摄的图片;
检测所述图片是否有黑边;
如果没有黑边,则输出无黑边的测试结果;
如果有黑边,检测所述黑边内各个像素点的值;
如果黑边内各个像素点的值相同,则输出是成像软件原因导致黑边的测试结果;及
如果黑边内各个像素点的值不同,则输出是机构原因导致黑边的测试结果。
2.如权利要求1所述的数字图像检测方法,其特征在于:所述像素点的值为颜色值或灰度值。
3.如权利要求1所述的数字图像检测方法,其特征在于:所述检测图片是否有黑边的步骤包括将检测图片边缘各像素点值的平均值是否小于一参考值的步骤。
4.如权利要求3所述的数字图像检测方法,其特征在于:所述各像素点值为各像素点的灰度值。
5.如权利要求4所述的数字图像检测方法,其特征在于:所述检测图片是否有黑边的步骤还包括在检测图片边缘各像素点值的平均值是否小于一参考值的步骤之前将图片转换为灰度图的步骤。
6.如权利要求5所述的数字图像检测方法,其特征在于:如果所述图片边缘的各像素点值的平均值小于所述参考值,则检测所述图片边缘的相邻边的各像素点值的平均值;如果检测到所述平均值大于所述参考值,则读取黑边的宽度。
7.如权利要求6所述的数字图像检测方法,其特征在于:如果所述黑边的宽度大于0,则检测所述黑边的各个像素点的灰度值是否相等;如果所述黑边的宽度为0,则输出无黑边的测试结果。
8.一种数字图像检测系统,包括一检测设备及一具照相功能的电子设备,其特征在于:所述检测设备包括一图片读取模组、一像素点值读取模组、一比较模组及一测试结果输出模组,所述图片读取模组读取所述电子设备拍摄的图片,所述像素点值读取模组读取所述图片边缘的像素点值,所述比较模组将所述图片边缘的像素点值与一参考值作比较从而检测出图片是否有黑边,如果有黑边,所述比较模组比较黑边内的各个像素点的值是否相同从而检测出产生黑边的原因,所述检测结果输出模组输出是否有黑边及产生黑边原因的测试结果。根据各像素点的值的情况输出对应的导致黑边成因的测试结果。
9.如权利要求8所述的数字图像检测系统,其特征在于:所述检测设备还包括一运算模组,所述运算模组计算出图片像素点的颜色值所对应的灰度值。
10.如权利要求9所述的数字图像检测系统,其特征在于:所述检测设备还包括一图片转化模组,所述图片转化模组在所述运算模组计算出图片各像素点的灰度值之后将所述图片转化为灰度图。
11.如权利要求8所述的数字图像检测系统,其特征在于:如果所述比较模组检测出所述黑边内的各个像素点的值相同,所述检测结果输出模组输出是成像软件问题导致黑边的测试结果,如果所述黑边内的各个像素点的值不相同,所述检测结果输出模组输出是机构问题导致黑边的测试结果。
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CN105430382A (zh) * 2015-12-02 2016-03-23 厦门雅迅网络股份有限公司 一种视频图像检测黑边的方法和装置
CN109212792A (zh) * 2018-07-26 2019-01-15 深圳同兴达科技股份有限公司 一种全贴合二合一模组防止贴合偏位检测方法

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