how to make an image over some background picture?

Question

Mark Golberg 2016-2-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/266979-how-to-make-an-image-over-some-background-picture

评论： Mark Golberg 2016-2-10

采纳的回答： Mayank Dwivedi

在 MATLAB Online 中打开

Hello,

I am gradually drawing an image on axes (creating the effect of image "slides in"), using

set(gca,'xlim',[0 120*fps],'ylim',[0 25],'nextplot','add','ydir','reverse');

Question is, the default background is a a simple white plane. How can I change it to my own picture?

I mean, if I place my picture on that axes, then the xlim and ylim becomes the size of the picture and I loose the settings I've made in an earlier command.

THANK YOU

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Mayank Dwivedi 2016-2-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/266979-how-to-make-an-image-over-some-background-picture#answer_209181

在 MATLAB Online 中打开

Hi Mark,

The link below describes how to add an image to the axis:

http://www.mathworks.com/matlabcentral/answers/96023-how-do-i-add-a-background-image-to-my-gui-or-figure-window

The answer mentioned in the link above plots an axis then uses a custom image as it's background. This axes is then made invisible and to plot again a new axes is used.

When you plot again, the new axis will also have a white background. To make the axis transparent and make the background picture visible you need to set the axis 'Color' property to 'None' after you have plotted the data. For example, after making the first axis invisible as described in the link above you do the following to plot the data with background image visible-

>> set(ha,'handlevisibility','off', ...
            'visible','off')
>> ha2 = axes('position',[0.3,0.35,0.4,0.4]) 
>> plot(rand(4))
>> set(gca, 'Color', 'None')

You can try implementing the "slide in" effect as you mentioned with the new axis. If you still face the issue please share the script that you are using.

Thanks,

Mayank