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sufian ahmed


Active since 2017

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Question


How can i extract green rectangle area from the rgb image ?
I have two image. one i take in night and another take in daylight. So i only mask the region where green pixels exists. but pro...

ongeveer 7 jaar ago | 1 answer | 0

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answer

Question


How can i find the both endpoints coordinates for a particular label number ?
First I label the image. so if i want to find the endpoints coordinates for a specific label then what i need to do ?

ongeveer 7 jaar ago | 1 answer | 0

1

answer

Question


how can i apply the canny operator in horizontal direction?
how can i apply the canny operator in horizontal direction in 2016a Matlab?

ongeveer 7 jaar ago | 0 answers | 0

0

answers

Question


What are the ways to achieve good accuracy in support vector machine ? (MATLAB)
Recently I works on depth values of an image. Basically those images are stairs [up & down].I draw a vertical line upon those im...

ongeveer 7 jaar ago | 0 answers | 0

0

answers

Question


How can i draw a line using only starting point ?
I want to draw a line on an image. But i only know the [x1 y1] or starting co-ordinates. I already attached an image. Here, a r...

ongeveer 7 jaar ago | 0 answers | 0

0

answers

Question


How can I remove the border line from the image ?
I have an image with some character. After the canny edge detection i get the digits with some border line. so I want to remove ...

ongeveer 7 jaar ago | 1 answer | 0

1

answer

Question


what is the mechanism of intersection between two lines ?
I got this code from internet, It works for intersection of two lines. but i dont understand how it works ? Please anyone explai...

ongeveer 7 jaar ago | 2 answers | 0

2

answers

Question


How can i find the intersection point between two lines ?
I have some horizontal images and i draw a vertical line upon them. But There are some angle exists among the horizontal lines a...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can I find the optimize value of 'C' or ' Boxconstraint' for linear SVM ?
I work with linear svm. but it not gives better output as I required.But when I change BoxConstraint it gives good output. now i...

meer dan 7 jaar ago | 0 answers | 0

0

answers

Question


How much value predict function returns ?
I trained a set of image and then pass only one image in a test and then pass it in predict function like: predictedLabels1...

meer dan 7 jaar ago | 0 answers | 0

0

answers

Question


How to solve Index exceeds matrix dimensions probelm ?
I am using ind2sub for connected component.but problem is that when i run multiple images and pass on each connected component ...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can I implement the depth feature in matlab?
Recently I works on Kinect v2. I read some paper . Most of the papers used depth feature for classification through svm. but i d...

meer dan 7 jaar ago | 0 answers | 0

0

answers

Question


How can I link the edges whose are in horizontal direction ?
I can find the endpoints of a edge. now i want to link the broken edges in the horizontal direction only. I already got a code w...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can I link the edges without using Imline ?
I can find the endpoints of a edge. now i want to link the broken edges. I already got a code where did something like this. bu...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


What modification should i do for these broken edges (red arrow) ?
I don't know why this marked edges are broken. but u see that all other edges are good. After median filtering i applied canny....

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can I modify this code so that canny edge detector can detect this red mark line ?
I take image using Microsoft kinect. But all time canny edge detector missed that line. I dont know why ?how can i detect this l...

meer dan 7 jaar ago | 0 answers | 0

0

answers

Question


How can i merge this purple color marked line and remove the line outside of green marked area ?
After canny edge detection i got this following image. but how can I merge this purple marked line so that other lines will not ...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can I manage dynamic array size ?
I face a problem. I call a function but function returns different number of values for ex: sometimes return 9 or 8 or 7 etc. b...

meer dan 7 jaar ago | 4 answers | 0

4

answers

Question


How can i use the extracted feature vector in support vector machine for image classification?
I extracted the depth feature from a depth image.Now i want to use this feature to recognize stair using svm. In math-works i sa...

meer dan 7 jaar ago | 0 answers | 0

0

answers

Question


How can I do this TOF calibration for kinect v2 and extract the RGB images by considering same resolution & position so that co-ordinates are exactly same for both depth & rgb images ?
Recently i found this link. They did some calibration in kinect v2 and then map it so that both depth and rgb frame have the sam...

meer dan 7 jaar ago | 0 answers | 0

0

answers

Question


How can i detect the green region(meter display) & crop it out using matlab?
I want to extract the green region(meter display).Here i attached a image which is digital electric meter. I want to extract...

meer dan 7 jaar ago | 2 answers | 0

2

answers

Question


how can i extract only this green region ?
<</matlabcentral/answers/uploaded_files/82954/1.jpg>> I want to extract those region which has the only green channels value....

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can i increase the size of * or star in this case ?
plot(P(1),P(2),'*r'); i want to increase the size of star(*). how can i ?

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How mat2gray work in matlab and How can I scale image using mat2gray as the format, 0 for max value and 255 for min value?
first of all i want to know how mat2gray works ?. i mean back end work and formula etc. then i want scale the image using it so ...

meer dan 7 jaar ago | 2 answers | 0

2

answers

Question


How can i convert kinect depth data in a range [0 255] or can say calculate in intensity format
How can I find out the intensity value from depth image within a range [0 255] since depth image represents distances in mm of e...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How can I change the resolution of kinect V2 in matlab?
Kinect V2 color stream supported format is : 1920x1080. But kinect V2 depth stream format is : 512x424. Now when I start live st...

meer dan 7 jaar ago | 1 answer | 0

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answer

Question


How to convert kinect color image resolution in 512x424 format ?
<https://www.mathworks.com/help/supportpkg/kinectforwindowsruntime/examples/plot-colored-point-cloud-from-kinect-for-windows-v2....

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


How to extract a specific region in matlab ?
I know the four coordinates of a trapezium or rectangle.Now i want to only extract this region and other things should be black....

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


Saving kinect depth frame(uint16) but Why it is too dark ?
Recently I works on kinect using matlab. I take depth frame which is in uint16 format. But when I display it or save it using ma...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


Sort pixelIdxList Array as descending order based on their number of pixels.
numPixels = cellfun(@numel,CC.PixelIdxList); numPixels = 1015 951 719 852 ...

meer dan 7 jaar ago | 1 answer | 0

1

answer

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