Performance Comparison of Digital Watermarking for Scanned Document in RGB and YCbCr Channels. - Narong Mettripun; Thumrongrat Amornraksa (PCM, 2009)

Robust image watermarking based on luminance modification. - Narong Mettripun; Thumrongrat Amornraksa; Edward J. Delp (J. Electronic Imaging, 2013)

Image gradient index for classifying digital camera and scanned images. - Narong Mettripun; Thumrongrat Amornraksa (ISCIT, 2014)

Thai Herb Leaves Classification Based on Properties of Image Regions. - Narong Mettripun (SICE, 2020)