Figure 13From: Region-of-interest determination and bit-rate conversion for H.264 video transcoding The subjective comparison for the 72nd frame of Foreman sequence with bit-rate 900 Kbps. (a) Pre-encoded frame. The pre-encoded bit-stream with bit-rate 1Mbps (b) ROI map detected by [23] (c) Partial frame of pre-encoded sequence (d) Partial frame of CPDT method, PSNRROI: 42.45dB, SSIMROI: 0.97, and (e) Partial frame of ROI-based transcoder. PSNRROI: 45.81dB, SSIMROI: 0.98.Back to article page