deletions | additions       diff --git a/In_citet_deng2013kinect_s_study__.tex b/In_citet_deng2013kinect_s_study__.tex  index ab559fb..653a9cc 100644  --- a/In_citet_deng2013kinect_s_study__.tex  +++ b/In_citet_deng2013kinect_s_study__.tex 
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In \citet{deng2013kinect}'s study, they consider three types of shadows in Kinect depth maps: attached shadows, detached shadows and alignment shadows. The Kinect has the IR projector positioned to the left of the IR camera (see Fig. 2(a)), 8(a)),  it is clear that the shadows in the original depth map will always be located to the left of any occluding foreground objects. This arrangement allows for the detection of shadows by scanning each horizontal line in the unaligned depth map. As a result, specific patterns of the shadows can be retrieved, as shown in Fig. 2(b). 8(b).