清空筛选条件
清空筛选条件

Eliminating the Border Around a Generated Image

3 次查看（过去 30 天）
Sarah
Sarah 2018-8-27
评论： Sarah 2018-8-27
I am creating images using the rectangle() function with various line and space sizes. I attached an example image to this question. I want to eliminate the border of white that surrounds the black rectangles. (It affects my pixel count calculations.) Currently, I am just using the imcrop() function, but the cropping dimensions have to change according to the line and space sizes. Is there a more efficient way than imcrop()?

请先登录，再回答此问题。

采纳的回答

jonas
jonas 2018-8-27
编辑：jonas 2018-8-27
There is a function that will do this for you in one step, but I forgot what it's called. Here's a primitive solution for you!
[y1,x1]=find(BW==0,1,'first')
[y2,x2]=find(BW==0,1,'last')
BW2=BW(y1:y2,x1:x2)
imshow(BW2)
Basically you find the upper left and bottom right corners, and then crop a rectangle between those.
  5 个评论
显示 3更早的评论
Image Analyst
Image Analyst 2018-8-27
Yep. 3 color channels - it's RGB. Try this first
BW = BW(:, :, 2); % Take green channel.
or else, if you want to keep it as a color image, do this:
BW2 = BW(y1:y2, x1:x2, :)

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Images 的更多信息

标签

产品


版本

R2018a

Community Treasure Hunt

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

Start Hunting!

Translated by