Sliding Line Point Regression for Shape Robust Scene Text Detection

30 Jan 2018  ·  Yixing Zhu, Jun Du ·

Traditional text detection methods mostly focus on quadrangle text. In this study we propose a novel method named sliding line point regression (SLPR) in order to detect arbitrary-shape text in natural scene. SLPR regresses multiple points on the edge of text line and then utilizes these points to sketch the outlines of the text. The proposed SLPR can be adapted to many object detection architectures such as Faster R-CNN and R-FCN. Specifically, we first generate the smallest rectangular box including the text with region proposal network (RPN), then isometrically regress the points on the edge of text by using the vertically and horizontally sliding lines. To make full use of information and reduce redundancy, we calculate x-coordinate or y-coordinate of target point by the rectangular box position, and just regress the remaining y-coordinate or x-coordinate. Accordingly we can not only reduce the parameters of system, but also restrain the points which will generate more regular polygon. Our approach achieved competitive results on traditional ICDAR2015 Incidental Scene Text benchmark and curve text detection dataset CTW1500.

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Datasets


Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Scene Text Detection SCUT-CTW1500 SLPR F-Measure 74.8 # 17
Precision 80.1 # 15
Recall 70.1 # 16

Methods