کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1783885 1524108 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Active thermography and post-processing image enhancement for recovering of abraded and paint-covered alphanumeric identification marks
ترجمه فارسی عنوان
ترموگرافی فعال و بهبود تصویر بعد از پردازش برای بازیابی علامت های شناسایی الفبایی با رنگ ریز و رنگی
کلمات کلیدی
ترموگرافی پالس، ترموگرافی قفل گام گرمای گرمایشی، تحقیقات قانونی، شماره سریال، برچسب های شناسایی،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک اتمی و مولکولی و اپتیک
چکیده انگلیسی
Alphanumeric marking is a common technique employed in industrial applications for identification of products. However, the realised mark can undergo deterioration, either by extensive use or voluntary deletion (e.g. removal of identification numbers of weapons or vehicles). For recovery of the lost data many destructive or non-destructive techniques have been endeavoured so far, which however present several restrictions. In this paper, active infrared thermography has been exploited for the first time in order to assess its effectiveness in restoring paint covered and abraded labels made by means of different manufacturing processes (laser, dot peen, impact, cold press and scribe). Optical excitation of the target surface has been achieved using pulse (PT), lock-in (LT) and step heating (SHT) thermography. Raw infrared images were analysed with a dedicated image processing software originally developed in Matlab™, exploiting several methods, which include thermographic signal reconstruction (TSR), guided filtering (GF), block guided filtering (BGF) and logarithmic transformation (LN). Proper image processing of the raw infrared images resulted in superior contrast and enhanced readability. In particular, for deeply abraded marks, good outcomes have been obtained by application of logarithmic transformation to raw PT images and block guided filtering to raw phase LT images. With PT and LT it was relatively easy to recover labels covered by paint, with the latter one providing better thermal contrast for all the examined targets. Step heating thermography never led to adequate label identification instead.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 78, September 2016, Pages 24-30
نویسندگان
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