上下文感知显着性检测

Context-AwareSaliencyDetection

Anewtypeofsaliency–context-awaresaliency1.Introduction2.Abstractwepresentadetectionalgorithmwhichisbasedonfourprinciplesobservedinthepsychologicalliteratureevaluatedintwoapplications:imageretargetingandsummarization

2.Principlesofcontext-awaresaliencyfourprinciples

Locallow-levelconsiderations,includingfactorssuchascontrastandcolor.

Globalconsiderations,whichsuppressfrequently-occurringfeatures,whilemaintainingfeaturesthatdeviatefromthenorm.

Visualorganizationrules,whichstatethatvisualformsmaypossessoneorseveralcentersofgravityaboutwhichtheformisorganized.High-levelfactors,suchashumanfaces.

2.Principlesofcontext-awaresaliency(b)没有抑制常见特征(c)未考虑局部对比，抑制太多特征saliency区域太少(d)两者结合(e)还检测到了水珠3.Detectionofcontext-awaresaliencyLocal-globalsingle-scalesaliency:当以pixel

i为中心的patch

i和图片上很多patch

j的距离都很大时，认为pixel

i是saliency的

dcolor:Euclideandistancebetweenthevectorizedpatchespi

andpj

inCIEL*a*bcolorspace——Principle(1)~(2)dposition:Euclideandistancebetweenthevectorizedpatchespi

andpj

inCIEL*a*bcolorspace——Principle(3)3.Detectionofcontext-awaresaliencyLocal-globalsingle-scalesaliency:K=65；r:某种尺度取跟patch

i距离最近的65个patch

q，不需要比较所有的patch，因为如果最近的patch跟patch

i的距离很大，则说明patch

i很显著，显著性公式（2）为单尺度下的显著性值：3.Detectionofcontext-awaresaliencyMulti-scalesaliencyenhancement

rk:多种尺度尺度选择：{100%,80%,50%,30%}计算多个尺度下的显著性值，取平均值

3.Detectionofcontext-awaresaliencyIncludingtheimmediatecontext:修正之前得到的显著性区域：根据阈值，显著性值大于0.8的当作mostattendedlocalizedareas图片上其他的像素，根据公式，重新计算显著性值dfoci(i)为像素i与距离最近的，属于mostattendedlocalizedareas的像素的欧式距离3.Results

对应figure

1的三种情况3.Results

对应figure

1的三种情况3.Results

对应figure

1的三种情况3.Results

量化结果4.Application

Imageretargeting4.Application

Imageretargeting4.Application

summarization5.Conclusion

提出一种新的saliency；提出四张标准局部对比（颜色、图案），具有不同颜色和图