清空筛选条件
清空筛选条件

how to find the area of black region in image....?

2 次查看（过去 30 天）
Meena
Meena 2012-5-15
I have to find the blank area in the image...ie its value is 0..how to find the area..help me out...

请先登录，再回答此问题。

回答（3 个）

Andrei Bobrov
Andrei Bobrov 2012-5-15
s = regionprops(YourImage == 0,'Area','PixelIdxList')
add
I = imread('44298455.png');
i0 = im2bw(I,graythresh(I));
s = regionprops(i0 == 0,'Area','PixelIdxList')
  4 个评论
显示 2更早的评论
Meena
Meena 2012-5-15
http://imageshack.us/photo/my-images/528/44298455.png/
this is image
Walter Roberson
Walter Roberson 2012-5-15
Is it the portion outside of the oval whose area you are trying to find?

请先登录，再进行评论。

Walter Roberson
Walter Roberson 2012-5-15
sum(YourImage(:) == 0)
  2 个评论
Meena
Meena 2012-5-15
not for whole image sir..I have to find the blank region first i.e segment the parts alone and then the area sir
Walter Roberson
Walter Roberson 2012-5-15
Are there parts of the image which contain blank areas that you do _not_ wish to have included? The code I gave does not give the area of the whole image, only of the blank area.

请先登录，再进行评论。

Image Analyst
Image Analyst 2012-5-15
Try this:
binaryImage = grayScaleImage == 0;
measurements = regionprops(binaryImage, 'Area');
allAreas = [measurements.Area]
allAreas will be an array of areas. Each physically separated, isolated, black region will have its own area in the array.
  4 个评论
显示 2更早的评论
Meena
Meena 2012-5-16
pls tell me is there any otherway to find the no of blank or the area of blank spaces

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Video Formats and Interfaces 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