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Questions tagged [threshold]
645 questions
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How to get correct threshold level for CFAR (Constant False alarm algorithm)?
I have taken fourier transform for a sinusoidal signal (with noise added). I have to pass the values to the CFAR algorithm (a function) and get back the threshold values in my main matlab file.
After getting the values I plot the same and I get a…
Sack11
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cumulative distribution function, threshold, R
I have daily values of runoff over a period of one month and one specific threshold. How can I find out on how many days the probability is more than 50% that the runoff exceeds that threshold?
Am I right to use the CDF here? But how can I integrate…
N_ni
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raster buffering with values within a given condition in R
I have a raster file containing temperature values and a list of coordinate points as centers of my desired buffers, colored in red like in the figure:
How can I extract buffers around the centroids containing all the neighbor cells matching the…
ADM
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Threshold function does not work OpenCV C++
I just want to do convert a gray image to a binary image. But threshold function gives me a totaly black image as a binary image. I want to get dark gray object.
What is wrong here?
Code:
Mat theFrame = imread("C:\\asdsss.png"); // opencv
Mat…
ffttyy
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R values under threshold
I have a daily time series of wind speeds and I would like R to return the average and maximum length of consecutive days beneath a certain threshold.
Example (Threshold = 2 m/s):
df >
date wind_speed
1970-01-01 1
1970-01-02 …
ChrM
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Retaining and identifying elements in an array which satisfy a threshold in MATLAB
I have a matrix (about 342 by 342) denoted by C_{ij} and I want to identify all indices i,j which satisfy the condition C_{ij} > rho where rho is some fixed value. I am using MATLAB
For example, if I have the matrix C_{ij} as:
C = 1 0.7 0.8
…
Ansh
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ANDROID autoCompleteView suggestions
I want to show suggestions not only as starting character but also a containing character... means 's' suggestions should be like tags,pas,also, and so on.
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Matlab - Dynamic Thresholding
I am trying to make a dynamic thresholding, but It is appearing some errors. I am trying to adapt from this code: http://www.inf.ed.ac.uk/teaching/courses/ivr/lectures/ivr5hand.pdf
function [Output ] = dinamicthresh()
[filename,pathname] =…
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Need to count objects on a white background in Python, shadows cause trouble
This question is kind of a follow-up to my 2 previous auestions: Python Image tutorial works, other images behaves differently (showing images with Pylab) and Detect objects on a white background in Python .
What I am trying to achieve is being able…
E. V. d. B.
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plotting from histogram threshold value
% OTSU THRESHOLDING
% X=imread('cameraman.tif')
% a=ones(256,1)*[1:256];
% c2=double(X).*(a/2+50)+(1-double(X)).*a/2;
% c3=uint8(255*mat2gray(c2));
% IDX = otsu(c3,2);
%----------------------------------------------------------
%
% function…
Fleron-X
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How to threshold intensity values for an image in R?
I have written a function in R which reads a text file and generates a color map using the coordinate information and intensity value for each co-ordiante within that file.
Now, I want to apply a specific threshold value for the intensities such…
novicegeek
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NoneType error .convert appear
i would like to do some program by capture image from webcam, then cropped it. after crop, i do some image processing and from the process it will run my robots. Here the full program:
import cv2
from cv2 import *
import numpy as np
import…
timekeeper
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Various Thresholding Methods Implementation in Python Opecv2
I want to compare the performance of various thresholding methods. Literally, I found various thresholding methods are
Histogram shape based methods (Ex:- Otsu Method)
Clustering based methods
Entropy based methods
Attribute similarity methods…
Thamizh
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Threshoding image between certain range
How to Threshold image between certain range?
i have done this but it doesn't work.
for (int i=0;i(j,i));
if (k>6 && k<10)
…
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T-SQL Calculate threshold from a recordset
I have the following result set :
ContentSendId ContentId NewsletterId Position IsConditionMatch SendDate NumberOfSends IsSendValid
------------- ----------- ------------ ----------- ----------------…
Murtaza Mandvi
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