A Study on the Effects of Noise Level, Cleaning Method, and Vectorization Software on the Quality of Vector Data. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Rosalina Abdul Salam (GREC, 2007)

Removing salt-and-pepper noise from binary images of engineering drawings. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Rosalina Abdul Salam (ICPR, 2008)

GREC'09 Arc Segmentation Contest: Performance Evaluation on Old Documents. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Mohd Azam Osman; Poh Lee Wong (GREC, 2009)

Salt and Pepper Noise Removal from Document Images. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Rosalina Abdul Salam (IVIC, 2009)

Enhancing Salt-and-Pepper Noise Removal in Binary Images of Engineering Drawing. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Rosalina Abdul Salam (IEICE Trans. Inf. Syst., 2009)

Final Report of GREC'11 Arc Segmentation Contest: Performance Evaluation on Multi-resolution Scanned Documents. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Mohd Azam Osman (GREC, 2011)

Crowd Parameter Extraction from Video at the Main Gates of Masjid al-Haram. - Hasan S. M. Al-Khaffaf; Fazilah Haron; Siamak Sarmady; Abdullah Zawawi Talib; Ibtesam M. Abu-Sulyman (ICFCE, 2011)

Empirical Performance Evaluation of Raster to Vector Conversion with Different Scanning Resolutions. - Bilal Abdulrahman T. Al-Douri; Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib (IVIC (1), 2011)

Empirical Performance Evaluation of Raster-to-Vector Conversion Methods: A Study on Multi-Level Interactions between Different Factors. - Hasan S. M. Al-Khaffaf; Abdullah Zawawi Talib; Rosalina Abdul Salam (IEICE Trans. Inf. Syst., 2011)

On the performance of Decapod's digital font reconstruction. - Hasan S. M. Al-Khaffaf; Faisal Shafait; Michael Patrick Cutter; Thomas M. Breuel (ICPR, 2012)

Final Report of GREC'13 Arc and Line Segmentation Contest. - Syed Saqib Bukhari; Hasan S. M. Al-Khaffaf; Faisal Shafait; Mohd Azam Osman; Abdullah Zawawi Talib; Thomas M. Breuel (GREC, 2013)