Browsing by Author "Hafizal, Yazid"

Now showing items 1-5 of 5

    • Automated thresholding in radiographic image for welded joints 

      Haniza, Yazid; Hamzah, Arof, Dr.; Hafizal, Yazid (Taylor & Francis, 2012)
      Automated detection of welding defects in radiographic images becomes non-trivial when uneven illumination, contrast and noise are present. In this paper, a new surface thresholding method is introduced to detect defects ...

    • Circular discontinuities detection in welded joints using Circular Hough Transform 

      Hafizal, Yazid; Haniza, Yazid; Mohd Harun; Shukri Mohd; A. Aziz, Mohamed; Mohamed Rizon, Mohamed Juhari; Shaharudin, Sayutia (Elsevier B.V., 2007)
      Conventional radiography is one of the common non-destructive testing which employs manual image interpretation. The interpretation is very subjective and depends much on the inspector experience and working conditions. ...

    • Discontinuities detection in welded joints based on inverse surface thresholding 

      Haniza, Yazid, Dr.; Hamzah, Arof, Dr.; Hafizal, Yazid; Sahrim, Ahmad; Abdul Aziz, Mohamed; Fauzan, Ahmad (Elsevier Ltd., 2011)
      Automated detection of welding defects in radiographic images becomes nontrivial when uneven illumination, contrast and noise are present. In this paper, a new approach using surface thresholding method is proposed to ...

    • Failure investigation on rusty mesh strainer of petrochemical plant 

      Shaiful Rizam, Shamsudin; Harun, Mohd; Mohd Arif Anuar, Mohd Salleh; Hafizal, Yazid; Mazlee, Mohd Noor, Dr. (Trans Tech Publications, 2013)
      The wire material of filter mesh is made of 304 grade stainless steel. The failure to run properly was due to the impact of burst and torn. The client also expects that the failure was due to corrosion problems. A visual ...

    • The root caused analysis of leakaged heat exchanger tube 

      Shaiful Rizam, Shamsudin; Mohd Arif Anuar, Mohd Salleh; Azmi, Rahmat, Assoc. Prof. Dr.; Mazlee, Mohd Noor, Dr.; Mohd Harun; Hafizal, Yazid (Carl Hanser Verlag GmbH & Co., 2015-03)
      AISI type 316L stainless steel was used as a heat exchanger tube material in an inter-cooler column. After less than a year of operation, severe corrosion failures occurred and a transverse opening leakage was observed on ...