کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
527488 869328 2015 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Matching-constrained active contours with affine-invariant shape prior
ترجمه فارسی عنوان
خطوط فعال با محدودیت سازگار با شکل غیر خطی قبل از آن؟
کلمات کلیدی
تقسیم خودکار خودکار، کنتور فعال، تطبیق شیء، انحراف معیار، تطبیق محدود کنتور فعال، رابطه بین نقاط به شکل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر چشم انداز کامپیوتر و تشخیص الگو
چکیده انگلیسی


• Object matching and active contour is combined for achieving automatic object segmentation.
• The key technique is a novel affine-invariant interior-points-to-shape relation.
• A constrained optimization model is proposed to unify the computational framework.
• A projected-gradient decent algorithm is derived to solve the proposed model.

In the object segmentation by active contours, an initial contour provided by user is often required. This paper extends the conventional active contour model by incorporating feature matching in the formulation for automatic object segmentation, yielding a novel matching-constrained active contour. The key to our formulation is a mathematical model of the relationship between interior feature points and object shape, called the interior-points-to-shape relation. According to this interior-points-to-shape relation, we are able to achieve the automatic object segmentation in two steps. Specifically, we are able to estimate the object boundary position given the matched interior feature points. Afterwards, we are able to further optimize the boundary position in the active contour framework. To obtain a unified optimization model for this task, we additionally formulate the matching score as a constraint to active contour model, resulting in our matching-constrained active contour. We also derive the projected-gradient descent equations to solve the constrained optimization. In the experiments, we show that our method achieves automatic object segmentation, and it clearly outperforms the related methods.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Vision and Image Understanding - Volume 132, March 2015, Pages 39–55
نویسندگان
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