bwboundaries获取图像边框

Question

我使用bwboundaries获取图像边框。它返回整数值。但我需要浮点像素。（空间像素）我该如何解决？

clc
clear all
close all
grayImage= dicomread('diz');

subplot(1, 1, 1);
imshow(grayImage, []);

hFH = imfreehand();

binaryImage = hFH.createMask();

subplot(1, 1, 1);
imshow(binaryImage);

structBoundaries = bwboundaries(binaryImage);
arrayBoundaries=cell2mat(structBoundaries);

Answer 1

试试interparc function on the MATLAB Files Exchange。对于structBoundaries中的第一个结构，bwboundaries的输出：

px = structBoundaries{1}(:,2);
py = structBoundaries{1}(:,1);
N = 100;
pt = interparc(N,px,py,'spline');
plot(px,py,'r*',pt(:,1),pt(:,2),'b-o')