How can I eliminate ghost detection?

rrv
2018 8 28
2 个回答
更新时间：2018 8 29
1 次查看（30 天）

0 个投票

I am tracking an object but I got a problem because my program detects a ghost object. How can I eliminate this? A screenshot is shown.

3 个评论
显示 1更早的评论 隐藏 1更早的评论

KSSV
KSSV 2018-8-28
How we can comment/ help with out knowing code?
rrv
rrv 2018-8-29
im = (abs(input_image(:,:,1)-background(:,:,1)) > threshold) | (abs(input_image(:,:,2) - background(:,:,2)) > threshold) ...
| (abs(input_image(:,:,3) - background(:,:,3)) > threshold);
b = bwmorph(im,'close');
im = bwmorph(b,'open');
im = bwmorph(im,'erode',2);
biggest_object = bwlabel(im,8);
object = regionprops(biggest_object);
N = size(object,1);
if N < 1||isempty(object)
return
end
s=find([object.Area]<200);
if ~isempty(s)
object(s)=[ ];
end
N=size(object,1);
if N < 1 || isempty(object)
return
end
for n=1:N
hold on
centroid = object(n).Centroid;
C_X = centroid(1);
C_Y = centroid(2);
end
Walter Roberson
Walter Roberson 2018-8-29
编辑：Walter Roberson 2018-8-29
The above code loops over the number of centroids but does nothing with them, and does not display anything.
It would help if we had the original image to test with. And the value of threshold .

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2018-8-28

1 个投票

You have attempted to index your image array as (X, Y) . That is incorrect: images arrays need to be indexed as (Y, X) in MATLAB. The first index in MATLAB, the row index, is considered to be the vertical distance (so the Y) and the second index in MATLAB, the column index, is considered to be the horizontal distance (so the X)
Image Analyst
Image Analyst 2018-8-29

1 个投票

You can get rid of half that program just by using bwareafilt():
biggest_object = bwareafilt(im, 1); % Extract largest blob only.
props = regionprops(biggest_object, 'Centroid');
if length(props) == 0 % If nothing is there, bail out.
return;
end
% Get centroid and plot it.
xCentroid = props.Centroid(1);
yCentroid = props.Centroid(2);
hold on;
plot(xCentroid, yCentroid, 'r+', 'MarkerSize', 30);
No need for the for loop, calls to size(), and other things you have there.

类别

在 帮助中心 和 File Exchange 中查找有关 Lidar Toolbox 的更多信息

产品

标签

提问:

rrv
rrv
2018-8-28

回答：

Image Analyst
Image Analyst
2018-8-29

Community Treasure Hunt

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

Start Hunting!

Translated by