Interpolative three-level block truncation coding algorithm
E. Oshri, N. Shelly, Harvey B. Mitchell · Electronics Letters · 1993
Zeng has described an interpolative two-level block truncation coding (BTC) image compression algorithm. The Letter extends the work of Zeng to a three-level interpolative BTC algorithm. Compared to Zeng, the new algorithm gives reconstructed images with substantially higher image quality with no increase in bit rate.