Pseudocolor Coding of Medical Images Based on Gradient
Pseudocolor coding is a common method in medical images enhancement and display. The key technology is gray- tocolor mapping functions. According to the features of medical images and human visual system, this paper develops a new nonlinear pseudocolor coding method based on gradient value.Firstly, we get the gradient image and define a threshold according to the gradient operator. Then, compared to the threshold, if the gradient is bigger than it, we code pixels with red on the basis of their gradient values. Otherwise, we define two thresholds to delimit the different extents according to gray values, again. And design nonlinear, sine transformation functions to code them. Due to the choice of three parameters k1,k2 and k3 in the mapping functions, this method adds the flexibility. This method is tested and compared by many experiments. It can make the outline of the medical images clearer and effectively highlight the disease areas, so the results improve doctors diagnoses.
medical images gradient pseudocolor coding filter
Li Jinxiu Li Junli Wei Ping
Institute of DSP and Software Techniques Ningbo University Ningbo, China
国际会议
武汉
英文
946-949
2007-07-06（万方平台首次上网日期，不代表论文的发表时间）