清空筛选条件
清空筛选条件

How to read and resize and change color image from URL link in our MATLAB commands?

8 次查看（过去 30 天）
Selva Karna
Selva Karna 2017-6-9
评论： Selva Karna 2017-7-4
How to read and resize and change color image from URL link in our MATLAB commands?

请先登录，再回答此问题。

采纳的回答

Gopichandh Danala
I am assuming a few things here and you can modify it to suit your requirement
% read image from url (I took a random image on internet)..
[url_img, map] = imread('https://static.pexels.com/photos/14621/Warsaw-at-night-free-license-CC0.jpg');
figure, imshow(url_img), title('Image from url')
% resize it..
resized_img1 = imresize(url_img, 0.2); % resize by a factor here 0.2
resized_img2 = imresize(url_img, [600 500]); % resize to a specifiv dimensions
% there are many ways of interpolation to perform resizing
resized_img3 = imresize(url_img, 0.2,'method','nearest'); % rsize by a specific interpolation method
figure, imshow(resized_img1), title('Resized image')
% change color did you mean from RGB to grayscale
gray_img = rgb2gray(resized_img1);
figure, imshow(gray_img), title ('Grayscale image')
  3 个评论
显示 1更早的评论
Gopichandh Danala
Gopichandh Danala 2017-6-13
编辑：Gopichandh Danala 2017-6-13
Are u asking for choosing filename/url_link on runtime even without knowing which URL you want to find or do you just want to check if a URL exists or not?
In the first case, I don't think it's possible for Matlab to go and randomly work as a Google to browse an HTML link.
In the second case, If you have a URL and want to check if its exists or not, this is more practical by try and catch block..
[str,status] = urlread('https://static.pexels.com/photos/14621/Warsaw-at-night-free-license-CC0.jpg');
try
IMG = imread('https://static.pexels.com/photos/14621/Warsaw-at-night-free-license-CC0.jpg');
catch
disp('URL link not available or broken')
end
If you have an idea of what you are looking for like some parameters you can construct the URL like this LINK

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 Read, Write, and Modify Image 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by