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題 名 | Automated Quality Inspection of Surface Defects on Touch Panels=觸控面板表面瑕疵之自動化品質檢測 |
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作 者 | 林宏達; 蔡環樺; | 書刊名 | 工業工程學刊 |
卷 期 | 29:5 2012.07[民101.07] |
頁 次 | 頁291-302 |
分類號 | 494.56 |
關鍵詞 | 觸控面板; 品質檢測; 結構性紋路; 傅立葉轉換; 米形濾波; Touch panel; Quality inspection; Structural texture; Fourier domain; Multi-crisscross filtering; |
語 文 | 英文(English) |
英文摘要 | Capacitive touch panels (CTPs) with advantages of water-proof, stain-proof, scratch-proof, and fast response are widely used in various electronic products built in touch technology functions. It is a difficult inspection task when defects imbedded on surfaces of CTPs with structural textures. This research proposes a Fourier transform-based approach to inspect surface defects of CTPs. When a CTP image with four directional and periodic lines of texture is transformed to Fourier domain, four principal bands with high-energy frequency components crisscross at the center of Fourier spectrum. A multi-crisscross filter is designed to filter out the frequency components of the principal band regions. The filtered image is then transformed back to spatial domain. Finally, the restored image is segmented by a simple threshold method and defects are located. Experimental results show the proposed method achieves a high defect detection rate and a low false alarm rate on defect inspection of touch panels. |
本系統中英文摘要資訊取自各篇刊載內容。