Issue with image background substraction

1 次查看（过去 30 天）
Turbulence Analysis
评论： Turbulence Analysis 2024-5-3
Hi,
I am trying to perform background substraction. Here I have both the main and background images. I tried imsubstract unfortunately that doesn't performing well.
  1 个评论
Matt J
Matt J 2024-5-2
编辑：Matt J 2024-5-2
Your post doesn't show what you did, so it is difficult to speculate what went wrong.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

DGM
DGM 2024-5-2
编辑：DGM 2024-5-3
Ran in:
First off, don't save images by taking screenshots of figures. Use imwrite().
Second, if you're going to use the IPT arithmetic tools, you need to know what they do. They are still dependent on class and scale, just like using normal arithmetic operators. Subtracting a light gray background region from a dark gray foreground feature in uint8 will still cause all the foreground information to be destroyed, since negative values can't be represented. Either convert to floating-point and use the absolute difference, or if the images are both the same class and scale, you can use imabsdiff().
inpict = imread('main image.jpg');
bg = imread('background.jpg');
outpict = imabsdiff(inpict,bg); % absolute difference
imshow(outpict,'border','tight')
There are other ways to solve the same problem.
outpict = im2double(inpict)./im2double(bg); % division
imshow(outpict,'border','tight')
In either case, you can use imcomplement() to invert the result if you want to change the polarity.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Image Arithmetic 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