How do I overlap 2 images in matlab?

4 次查看（过去 30 天）
jinwoo lee
jinwoo lee 2021-1-26
评论： jinwoo lee 2021-2-1
Hi, all
There are two images of size M X N shown below.
(left image source: https://commons.wikimedia.org/wiki/File:International_10-20_system_for_EEG-MCN.svg)
In fact, my purpose was to create a topomap for the EEG signal, but it was difficult to use a known tool (e.g. EEGLAB), so I made it myself.
How do I make the black part in the right picture transparent and then overwrite the left picture? Or I would like to know how to show them at the same time.
The purpose is to make the following through two images.

请先登录，再回答此问题。

回答（1 个）

David Hill
David Hill 2021-1-26
Assuming the pictures are rgb matrixes.
picture2=reshape(picture2,[],3);
idx=ismember(picture2,[0 0 0],'rows');%find the black (I am assuming your image has no true black in the interior)
picture2(idx,:,:)=255;%change the black to white
picture2=reshape(picture2,size(picture1));%reshape to original matrix size
newPicture=min(picture1,picture2);%since picture1 is just black and white taking the minimum will produce the black of picture 1 overlayed on picture2
  1 个评论
jinwoo lee
jinwoo lee 2021-2-1
Thanks for any help. My one is not an rgb matrix, so I solved it in a different way.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 EEG/MEG/ECoG 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by