arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.12337cs.CV
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显著图像抠图

Salient Image Matting

Fynd(芬德科技);University of Michigan(密歇根大学)

Rahul Deora, Rishab Sharma, Dinesh Samuel Sathia Raj

摘要:

在本文中,我们提出了一个图像抠图框架,称为显着图像抠图估计每像素的不透明度值的最显着前景的图像。为了处理图像中大量的语义多样性,通常需要三重图,因为它为抠图过程提供了关于对象语义的重要指导。然而,创建一个好的trimap通常是昂贵和耗时的。SIM框架同时处理以全自动和端到端的方式学习各种语义和突出对象类型的挑战。具体而言,我们的框架能够为各种前景对象和前景类(例如人类)出现在与直接来自RGB输入的训练数据非常不同的上下文中的情况下产生准确的alpha蒙版。这是通过采用显著性目标检测模型来产生图像中最显著的对象的三重图以引导关于更高级别的对象语义的抠图模型来完成的。我们的框架利用大量的粗注释加上启发式trimap生成方案来训练trimap预测网络,以便它可以为任意前景生成trimap。此外,我们引入了一个多尺度融合架构的任务,抠图,以更好地捕捉更精细,低层次的不透明度语义。通过trimap网络提供的高级指导,与其他自动方法相比,我们的框架只需要一小部分昂贵的抠图数据,同时能够为各种输入生成alpha抠图。我们展示了我们的框架在一系列不同的图像和实验结果表明,我们的框架相比,有利的最先进的抠图方法,而不需要一个trimap

英文摘要:

In this paper, we propose an image matting framework called Salient Image Matting to estimate the per-pixel opacity value of the most salient foreground in an image. To deal with a large amount of semantic diversity in images, a trimap is conventionally required as it provides important guidance about object semantics to the matting process. However, creating a good trimap is often expensive and timeconsuming. The SIM framework simultaneously deals with the challenge of learning a wide range of semantics and salient object types in a fully automatic and an end to end manner. Specifically, our framework is able to produce accurate alpha mattes for a wide range of foreground objects and cases where the foreground class, such as human, appears in a very different context than the train data directly from an RGB input. This is done by employing a salient object detection model to produce a trimap of the most salient object in the image in order to guide the matting model about higher-level object semantics. Our framework leverages large amounts of coarse annotations coupled with a heuristic trimap generation scheme to train the trimap prediction network so it can produce trimaps for arbitrary foregrounds. Moreover, we introduce a multi-scale fusion architecture for the task of matting to better capture finer, low-level opacity semantics. With high-level guidance provided by the trimap network, our framework requires only a fraction of expensive matting data as compared to other automatic methods while being able to produce alpha mattes for a diverse range of inputs. We demonstrate our framework on a range of diverse images and experimental results show our framework compares favourably against state of art matting methods without the need for a trimap

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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