I have a transparent .png picture when I add it to the current figure the background of it changes to black!

31 ビュー (過去 30 日間)
Hey all, I wanted to add a picture of my current figure. The picture is transparent png but when I added to my figure a black background appears with it. please see the picture below (in this picture the 2 png pictures are 2 small colorful circles and the current figure is a map of country:
This happening while my circle is png and transparent:
I don't know what is this black background, I want to delete it. The code that I used is:
%read map (tif file)
[A,R] = readgeoraster('DEM_30s.tif', 'OutputType', 'double');
low_single = typecast(uint8([255 255 127 255]), 'single');
mask = low_single==A;
A = A - min(A(~mask), [], 'all');
% creating colormap changing from white to brown as shown in image in the question
brown_color = [0.8 0.2 0.1];
light_brown = [0.95 0.9 0.8];
t = linspace(0, 1, max(A,[],'all'))';
cmap = t.*brown_color + (1-t).*light_brown;
% plot tif file
gs = geoshow(A, cmap, R);
gs.CData(repmat(mask,1,1,3)) = 255;
axis equal
box on
hold on
% read small circle
img = imread('filename1.png');
image('CData',img,'XData',[50 52],'YData',[30 32])
hold off

採用された回答

Ameer Hamza
Ameer Hamza 2020 年 4 月 13 日
編集済み: Ameer Hamza 2020 年 4 月 13 日
Read the transperancy map and use it to make the background transparent.
% read small circle
[img, ~, tr] = imread('test.png');
im = image('CData',img,'XData',[50 52],'YData',[30 32]);
im.AlphaData = tr;
hold off
  2 件のコメント
BN
BN 2020 年 4 月 13 日
編集済み: BN 2020 年 4 月 13 日
Really Thank you it's fixed now.
Just one thing, the circle rotated! because in the main png is:
But after adding it to figure it is rotated!

サインインしてコメントする。

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeImages についてさらに検索

製品


リリース

R2020a

Community Treasure Hunt

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

Start Hunting!

Translated by