清空筛选条件
清空筛选条件

How to measure the distances in a binarized image

1 次查看（过去 30 天）
Rohit Thokala
Rohit Thokala 2022-1-4
评论： yanqi liu 2022-1-6
I want to measure some distance on a binarized image and automate the process to all other images. imdistline command works for individual images on output window but, I want to measure this distance for almost 500 images. I am attaching original and binarized image of the same here for reference. In the binarized image I have mentioned the distances (i.e., X and Y) that I want to measure in the red arrows. Thanks in advance.
  1 个评论
Matt Gaidica
Matt Gaidica 2022-1-4
How stereotyped is the splash pattern? Could you provide a larger set of images? My instict would be to clean up the binary version, limit a blob analysis to 2 blobs, then measure their bounding boxes.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

yanqi liu
yanqi liu 2022-1-5
Ran in:
yes，sir，may be upload 5 image to debug，such as
clc; clear all; close all;
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/852995/original%20image.jpg');
im = rgb2gray(img);
bw = imbinarize(im,'adaptive','ForegroundPolarity','dark','Sensitivity',0.5);
bw2 = imopen(bw, strel('line', round(size(bw,2)*0.5), 0));
bw2 = imdilate(bw2, strel('square', 7));
bw(bw2) = 0;
bw = bwareafilt(imclearborder(bw), 1);
bwt = bw;
bw2 = imopen(bw, strel('line', round(size(bw,2)*0.05), 0));
bw2 = imdilate(bw2, strel('square', 5));
bw(~bw2) = 0;
bw = bwareafilt(bw, 2);
stats = regionprops(bw);
figure; imshow(bwt,[]);
hold on;
for i = 1 : length(stats)
rectangle('Position', stats(i).BoundingBox, 'EdgeColor', 'r', 'LineWidth', 2);
end
  4 个评论
显示 2更早的评论
Rohit Thokala
Rohit Thokala 2022-1-5
编辑：Rohit Thokala 2022-1-5
ok thank you. above code is working properly for small spray clouds but not bigger clouds. I am attaching a figure for reference. Could you help something with this. thanks in advance
yanqi liu
yanqi liu 2022-1-6
Ran in:
yes，sir，the image area segment may be confuse as one block
clc; clear all; close all;
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/853490/original_image.jpg');
im = rgb2gray(img);
bw = imbinarize(im,'adaptive','ForegroundPolarity','dark','Sensitivity',0.5);
bw2 = imopen(bw, strel('line', round(size(bw,2)*0.5), 0));
bw2 = imdilate(bw2, strel('square', 7));
bw(bw2) = 0;
bw = bwareafilt(imclearborder(bw), 1);
bwt = bw;
bw2 = imopen(bw, strel('line', round(size(bw,2)*0.05), 0));
bw2 = imdilate(bw2, strel('square', 5));
bw(~bw2) = 0;
bw = bwareafilt(bw, 2);
Warning: One or more ties for n-th place occurred when selecting objects. Some objects were not selected.
stats = regionprops(bw);
figure; imshow(bwt,[]);
hold on;
k = 0;
rects = [];
for i = 1 : length(stats)
if stats(i).Area < 1e4
continue;
end
k = k + 1;
rectangle('Position', stats(i).BoundingBox, 'EdgeColor', 'r', 'LineWidth', 2);
rects = [rects; stats(i).BoundingBox];
end
if size(rects, 1) < 2
wh = rects(1,:);
rect1 = [rects(1:2) wh(3)*0.5-10 wh(4)];
rect2 = [rects(1)+wh(3)*0.5+10 rects(2) wh(3)*0.5-10 wh(4)];
rectangle('Position', rect1, 'EdgeColor', 'y', 'LineWidth', 2);
rectangle('Position', rect2, 'EdgeColor', 'y', 'LineWidth', 2);
end

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Semantic Segmentation 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by