How to extract data from image figure?

36 次查看（过去 30 天）
moose
moose 2015-11-15
回答： John 2021-4-26
Hello, I am using "imcontrast" to adjust contrast of figure. Then I press "adjust data". Now, my question is, how can I get a matrix variable in my work space with values of the new adjusted figure?
Thank you.

请先登录，再回答此问题。

回答（2 个）

Stephen23
Stephen23 2015-11-15
You can use getimage
  3 个评论
显示 1更早的评论
Stephen23
Stephen23 2015-11-15
编辑：Stephen23 2015-11-15
@moose: I notice that you have asked multiple questions on this forum and sometimes received quite comprehensive answers, but you have never accepted any answer. It is considered polite on this forum to accept an answer that helped resolve your query.
Image Analyst
Image Analyst 2015-11-15
True, getimage() will extract the image from the axes, but he had to put it in there in the first place, so the contrast-adjusted image array is still in memory, or at least it was at some time. An alternative is to pass the array around in memory using some of the techniques in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F, though admittedly getimage() is probably easier. Though there's other good stuff in the FAQ so it's worth checking out. One thing to note is that getimage() retains the bit depth of the original image so that if you put a 16 bit image into your 8/32 bit display, you will get the original 16 bits out, not 8, which is good.

请先登录，再进行评论。

John
John 2021-4-26
If in imcontrast, your min value is mn, and your max value is mx, and fn = the number of the figure window you're interested in:
h = figure(fn);
img = max(mn, min(mx, getimage(h)));

类别

在 Help Center 和 File Exchange 中查找有关 Call C from MATLAB 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