Trimap generation for digital matting using camera exposure  

作　　者：WANG Lu OUYANG Binlin LI Chengrong 

机构地区：[1]Engineering College, Northeast Agricultural University, Harbin 150030, China [2]Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Journal of Northeast Agricultural University(English Edition)》2007年第2期176-179,共4页东北农业大学学报（英文版）

基　　金：Supported by the National Key Techenology Innovation Program of China under Grant(02BK-029);National Natural Science Foundation of China Under Grant(60105002)

摘　　要：This paper proposed a method to automatically generate the trimap for digital matting. Camera parameters of aperture and shutter speed are used to control its exposure, and accordingly to take pictures of stationary foreground with blurred background. Our method was inspired by color difference matting, both of which require a pre-record background image. In our method, only one image was required. Upon this input image, the process of blurring-deblurring, subtraction, thresholding and dilation were applied to finally generate the trimap. No user＇ s direct interface with the image was needed, and the user only needed to adjust the threshold or width of dilation for some input images. It reduces users＇ conservative interaction, and results are reliable for most of the pictures.This paper proposed a method to automatically generate the trimap for digital matting. Camera parameters of aperture and shutter speed are used to control its exposure, and accordingly to take pictures of stationary foreground with blurred background. Our method was inspired by color difference matting, both of which require a pre-record background image. In our method, only one image was required. Upon this input image, the process of blurring-deblurring, subtraction, thresholding and dilation were applied to finally generate the trimap. No user＇ s direct interface with the image was needed, and the user only needed to adjust the threshold or width of dilation for some input images. It reduces users＇ conservative interaction, and results are reliable for most of the pictures.

关 键 词：image processing digital matte trimap EXPOSURE SEGMENT 

分 类 号：TN911.73[电子电信—通信与信息系统]