System and process for image rescaling using adaptive interpolation kernel with sharpness and de-ringing control

摘要

A digital video rescaling system is provided. The system includes an image data input configured to receive input support pixels y₁ to y_n and a sharpness control module configured to generate a sharpness control parameter Kshp. The system further includes an interpolated pixel generator configured to use an adaptive interpolation kernel to generate an interpolated pixel y_s based on the input support pixels, and adjust a sharpness of the interpolated pixel y_s based at least partly upon the sharpness control parameter Kshp. The system also includes a de-ringing control unit to adjust the ringing effect of the interpolated pixel based on a local image feature Kfreq, and an output module configured to output the adjusted interpolated pixel for display.