Localizing slab identification numbers in factory scene images
- 作者：SungHoo Choi ; Jong Pil Yun ; Keunhwi Koo ; Sang Woo Kim ; swkim@postech.edu
- 关键词：Text detection ; Text localization ; Text extraction ; Text-finder ; Character location ; Character segmentation ; Optical character recognition (OCR)
- 刊名：Expert Systems with Applications
- 出版年：2012
- 期刊代码：62_09574174
- 类别：et
- 出版时间：July, 2012
- 卷：39
- 期：9
- 页码：7621-7636
- 文件大小：3834 K
摘要
This paper deals with algorithms for text localization and character segmentation in images for process automation in the steel-making industry. Each character which comprises slab identification numbers may be corrupted severely before it is captured by network cameras. Therefore, proper processing is required to localize the target texts successfully. In this paper, we propose (1) a method to evaluate the closeness of an edge patch to the form of a closed contour, (2) an edge inspection method to determine character colors and estimate font thickness, and (3) three reasonable binarization methods to increase the performance of the algorithm for the detection of the left and right boundaries of the text rectangle. The experimental results show that the proposed algorithms are reliable.