- Volume 4 Issue 4
A Method for Estimating Local Intelligibility for Adaptive Digital Image Decimation
적응형 디지털 영상 축소를 위한 국부 가해성 추정 기법
- 곽노윤 (천안대학교 정보통신학부)
- Published : 2003.12.01
This paper is about the digital image decimation algorithm which generates a value of decimated element by an average of a target pixel value and a value of neighbor intelligible element to adaptively reflect the merits of ZOD method and FOD method on the decimated image. First, a target pixel located at the center of sliding window is selected, then the gradient amplitudes of its right neighbor pixel and its lower neighbor pixel are calculated using first order derivative operator respectively. Secondly, each gradient amplitude is divided by the summation result of two gradient amplitudes to generate each intelligible weight. Next, a value of neighbor intelligible element is obtained by adding a value of the right neighbor pixel times its intelligible weight to a value of the lower neighbor pixel times its intelligible weight. The decimated image can be acquired by applying the process repetitively to all pixels in input image which generates the value of decimated element by calculating the average of the target pixel value and the value of neighbor intelligible element.
digital image decimation;intelligible weight;adaptive image decimation;FOD;ZOD