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how can I remove irrelevant points that they have been extracted with vl_sift from an image?
2019 Community Moderator ElectionHow to remove outliers?Neighbors of specific segment in a segmented imageHow to estimate/determine surface normals and tangent planes at points of a depth image?Finding Local peaks and troughs in a Time Series using MatlabHow to compute Gibbs energy in 2D image from a clear exampleUsing the “find” command to accumulate values “without for loops”How to extract desired points from graph and calculate distance between them in MATLAB?How to indicate different groups of connected points/nodes(2D plane)?How to use GPU for extracting patches from imagesMatlab: Find next lesser floating point number
-2
I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5.
I = single(imread('cameraman.tif'));
[f,d] = vl_sift(I);
for r =1:size(f,2)
x = abs(round(f(1,r)-f(1,:)));
y = abs(round(f(2,r)- f(2,:)));
[xx,indxx] = find(x<=20 & y<=20)
end
matlab for-loop vlfeat
asked yesterday
soloistsoloist
23
add a comment |
-2
I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5.
I = single(imread('cameraman.tif'));
[f,d] = vl_sift(I);
for r =1:size(f,2)
x = abs(round(f(1,r)-f(1,:)));
y = abs(round(f(2,r)- f(2,:)));
[xx,indxx] = find(x<=20 & y<=20)
end
matlab for-loop vlfeat
asked yesterday
soloistsoloist
23
This can probably be done without a loop. Please provide a complete example in code, with actual inputs and desired output (and then I will happily remove my downvote)
– Luis Mendo
yesterday
Each iteration of your loop overwritesx,y,xx, andindxx, thus after finishing you'll only have the results forr = 150. If you want to have all results persistent, save them properly in a cell array as you'll encounter varying lengths forxxandindxx,
– HansHirse
yesterday
add a comment |
-2
-2
-2
I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5.
I = single(imread('cameraman.tif'));
[f,d] = vl_sift(I);
for r =1:size(f,2)
x = abs(round(f(1,r)-f(1,:)));
y = abs(round(f(2,r)- f(2,:)));
[xx,indxx] = find(x<=20 & y<=20)
end
matlab for-loop vlfeat
asked yesterday
soloistsoloist
23
I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5.
I = single(imread('cameraman.tif'));
[f,d] = vl_sift(I);
for r =1:size(f,2)
x = abs(round(f(1,r)-f(1,:)));
y = abs(round(f(2,r)- f(2,:)));
[xx,indxx] = find(x<=20 & y<=20)
end
matlab for-loop vlfeat
matlab for-loop vlfeat
asked yesterday
soloistsoloist
23
asked yesterday
soloistsoloist
23
edited yesterday
soloist
asked yesterday
soloistsoloist
23
asked yesterday
soloistsoloist
23
asked yesterday
soloistsoloist
23
23
This can probably be done without a loop. Please provide a complete example in code, with actual inputs and desired output (and then I will happily remove my downvote)
– Luis Mendo
yesterday
Each iteration of your loop overwritesx,y,xx, andindxx, thus after finishing you'll only have the results forr = 150. If you want to have all results persistent, save them properly in a cell array as you'll encounter varying lengths forxxandindxx,
– HansHirse
yesterday
add a comment |
This can probably be done without a loop. Please provide a complete example in code, with actual inputs and desired output (and then I will happily remove my downvote)
– Luis Mendo
yesterday
Each iteration of your loop overwritesx,y,xx, andindxx, thus after finishing you'll only have the results forr = 150. If you want to have all results persistent, save them properly in a cell array as you'll encounter varying lengths forxxandindxx,
– HansHirse
yesterday
This can probably be done without a loop. Please provide a complete example in code, with actual inputs and desired output (and then I will happily remove my downvote)
– Luis Mendo
yesterday
This can probably be done without a loop. Please provide a complete example in code, with actual inputs and desired output (and then I will happily remove my downvote)
– Luis Mendo
yesterday
Each iteration of your loop overwrites
x, y, xx, and indxx, thus after finishing you'll only have the results for r = 150. If you want to have all results persistent, save them properly in a cell array as you'll encounter varying lengths for xx and indxx,– HansHirse
yesterday
Each iteration of your loop overwrites
x, y, xx, and indxx, thus after finishing you'll only have the results for r = 150. If you want to have all results persistent, save them properly in a cell array as you'll encounter varying lengths for xx and indxx,– HansHirse
yesterday
add a comment |
1 Answer
1
active
oldest
votes
0
Try this:
% Input.
f = 50 * rand(2, 150);
% Initialize output.
xx = cell(1, size(f, 2));
indxx = cell(1, size(f, 2));
% Calculate output.
for r = 1:size(f, 2);
x = abs(round(f(1, r) - f(1, :)));
y = abs(round(f(2, r) - f(2, :)));
[xxr, indxxr] = find(x <= 20 & y <= 20);
end
answered yesterday
HansHirseHansHirse
34312
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
@soloist I'm afraid, I don't understand your question.indxxrwill store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are severalindxxrwithnumel(indxxr) > 5.
– HansHirse
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
.I edited my question
– soloist
yesterday
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Try this:
% Input.
f = 50 * rand(2, 150);
% Initialize output.
xx = cell(1, size(f, 2));
indxx = cell(1, size(f, 2));
% Calculate output.
for r = 1:size(f, 2);
x = abs(round(f(1, r) - f(1, :)));
y = abs(round(f(2, r) - f(2, :)));
[xxr, indxxr] = find(x <= 20 & y <= 20);
end
answered yesterday
HansHirseHansHirse
34312
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
@soloist I'm afraid, I don't understand your question.indxxrwill store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are severalindxxrwithnumel(indxxr) > 5.
– HansHirse
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
.I edited my question
– soloist
yesterday
add a comment |
0
Try this:
% Input.
f = 50 * rand(2, 150);
% Initialize output.
xx = cell(1, size(f, 2));
indxx = cell(1, size(f, 2));
% Calculate output.
for r = 1:size(f, 2);
x = abs(round(f(1, r) - f(1, :)));
y = abs(round(f(2, r) - f(2, :)));
[xxr, indxxr] = find(x <= 20 & y <= 20);
end
answered yesterday
HansHirseHansHirse
34312
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
@soloist I'm afraid, I don't understand your question.indxxrwill store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are severalindxxrwithnumel(indxxr) > 5.
– HansHirse
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
.I edited my question
– soloist
yesterday
add a comment |
0
0
0
Try this:
% Input.
f = 50 * rand(2, 150);
% Initialize output.
xx = cell(1, size(f, 2));
indxx = cell(1, size(f, 2));
% Calculate output.
for r = 1:size(f, 2);
x = abs(round(f(1, r) - f(1, :)));
y = abs(round(f(2, r) - f(2, :)));
[xxr, indxxr] = find(x <= 20 & y <= 20);
end
answered yesterday
HansHirseHansHirse
34312
Try this:
% Input.
f = 50 * rand(2, 150);
% Initialize output.
xx = cell(1, size(f, 2));
indxx = cell(1, size(f, 2));
% Calculate output.
for r = 1:size(f, 2);
x = abs(round(f(1, r) - f(1, :)));
y = abs(round(f(2, r) - f(2, :)));
[xxr, indxxr] = find(x <= 20 & y <= 20);
end
answered yesterday
HansHirseHansHirse
34312
answered yesterday
HansHirseHansHirse
34312
answered yesterday
HansHirseHansHirse
34312
answered yesterday
HansHirseHansHirse
34312
34312
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
@soloist I'm afraid, I don't understand your question.indxxrwill store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are severalindxxrwithnumel(indxxr) > 5.
– HansHirse
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
.I edited my question
– soloist
yesterday
add a comment |
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
@soloist I'm afraid, I don't understand your question.indxxrwill store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are severalindxxrwithnumel(indxxr) > 5.
– HansHirse
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
.I edited my question
– soloist
yesterday
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
thank for your help.if Iwant to store indxx with numel > 5,how can do this?
– soloist
yesterday
@soloist I'm afraid, I don't understand your question.
indxxr will store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are several indxxr with numel(indxxr) > 5.– HansHirse
yesterday
@soloist I'm afraid, I don't understand your question.
indxxr will store vectors (or whatever) of arbitrary size since it's a cell array. In my artificial example, there are several indxxr with numel(indxxr) > 5.– HansHirse
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
In order to better understand, I will briefly explain what I want to do.I have an image and extract from it a number of points by using vl_sift function.I want to remove irrelevant points.To do this, I want to first calculate the distance from each point of all points And then the point where the number of neighbors in the interval considered as a condition, if more than 5 is considered as a suitable point and remove points with a neighborhood of less than 5
– soloist
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
@soloist For me, it's still hard to understand, what you want to achieve. If this is still related to your original question, please update, and provide sample images. Otherwise, you should post a new question, and provide further details and sample images there.
– HansHirse
yesterday
.I edited my question
– soloist
yesterday
.I edited my question
– soloist
yesterday
add a comment |
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This can probably be done without a loop. Please provide a complete example in code, with actual inputs and desired output (and then I will happily remove my downvote)
– Luis Mendo
yesterday
Each iteration of your loop overwrites
x,y,xx, andindxx, thus after finishing you'll only have the results forr = 150. If you want to have all results persistent, save them properly in a cell array as you'll encounter varying lengths forxxandindxx,– HansHirse
yesterday