Application of Quad Tree for low bitrate compression
K. C. Ravi Chandra Varma, Sudharsan Parthasarathy, Praveen Sankaran · 2012
Quad Tree algorithm is an efficient method for image compression at lower bit rates. It divides the image into four equal quadrants based on a threshold. The threshold is chosen from image characteristics using Otsu thresholding method. The image regions obtained from the Quad Tree decomposition are approximated by using a first order polynomial. Polynomial approximation coefficients now represent the pixel values. Its performance is better than JPEG at lower bitrates.