如何使用 MATLAB 跟踪表面积以及平滑图像中的特定区域 [英] How to trace the surface area as well as smoothen a specific region in an image using MATLAB

问题描述

我有一张图片，有 6 种颜色，每种颜色表示一个值.我得到了如下图所示的图像.

I have an image with 6 colors each indicating a value. I had obtained an image as shown below.

我需要平滑边缘，然后找出该区域的面积和表面积.第二张图显示了在边缘绘制的黑线，这表明我需要以这种方式平滑边缘.

I need to smoothen the edges and then find out the area as well as the surface area of that region. The second image shows a black line drawn in the edges which indicates that I need to smoothen the edges in such a way.

我已经使用分割创建了一个如第三张图片所示的蒙版，然后使用图片后面的代码获得了一个分割的图片.

I had used segmentation to create a mask as shown in the third image, and then obtain a segmented image using the code following the image.

我使用以下代码生成蒙版图像.来源:如何分割

I have used the following code for generating till the masked image. Source : How to segment

 imshow(Out1)  
 str = 'Click to select initial contour location. Double-click to confirm    and proceed.';
 title(str,'Color','b','FontSize',12);
 disp(sprintf('\nNote: Click close to object boundaries for more accurate   result.'));
 mask = roipoly;
 figure, imshow(mask)
 title('Initial MASK');
 maxIterations = 3000; 
 bw = activecontour(Out1, mask, maxIterations, 'Chan-Vese');

 % Display segmented image
 figure, imshow(bw)
 title('Segmented Image');

为了使用activecontour"功能，我的图像需要是灰度图像，我无法将其转换为灰度并返回.还要找出该区域的表面积/面积是否有任何内置功能.请帮忙谢谢.

In order to use the 'activecontour' function my image needs to be a grey-scale image, which I'm not being able to convert to greyscale and back. Also to find out surface area/ area of the region is there any inbuilt function. Please help thanks.

推荐答案

use im2double、im2uint8 等将二进制图像转换为灰度.

use im2double, im2uint8, etc. to convert binary image to grayscale.

使用 bwarea 或 regionprops 以查找区域区域.

use bwarea or regionprops to find the region area.

这篇关于如何使用 MATLAB 跟踪表面积以及平滑图像中的特定区域的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！