Peaks above the threshold

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• remove the threshold values of table

  Hello

  I would like to get help to complete my program where I am removing values above a threshold in a table and establish the curve according to the values above the threshold (from-45 in this case) is deleted.  I still seem to have a few values greater than the threshold that appears in the desired graphic.  Any help is greatly appreciated.

  Thank you

  hiNi.

  Your VI is extremely complicated. All you need is a conditional tunnel.

• Average of all values between (above first and last above) a threshold value.

  Currently I have a VI where I programmed a year or more ago, takes any value of a set of data that exceeds a certain threshold. It is used to capture the average of all values above a threshold when there is a peak of the values that exceed this threshold. However, when there are two or more peaks that exceed this threshold, only values greater than this value are averaged, so the final result is the average of the two or more.

  What I need is for each value that occurs after the threshold is reached, and before that the threshold fell below for the last time. Imagine a set of data whose graph looks like the letter "M" for example with the threshold being to halfway to the top of the M, I want to show the average (the first bump, the fall below the bumps, as well as the last bump) but what I'm saying now is the average of (the first bump, over the last bump). What I get now cut the data between the two summits.

  Any help would be appreciated of course.

  Here's a method, perhaps not the best.

  

• How the LED lights up when a threshold is reached, then turns off only when the value does not reach the threshold for a while?

  Hi, I want to write a program that can turn on the LED when a range of value, this is the threshold and only when the value does not reach the threshold for a period of time, say 5 seconds, then the LED will turn off, otherwise it will remain. How can I achieve this in labview? Can someone help me? Really thanks!

  I assume that you use a while loop to keep the updated value.

  Add a record to offset to your looping it initialize with a U32 (time in ms)

  Add the registry to offset to your loop that keeps the previous value of your bool

  When your reaches the threshold value => the light and set the current time in your shift register.

  In the next iteration of the loop weather check value is still above threshold

  => Y-online previous set to true?

  => Y-online the next iteration

  -Online N => turn switch on and set the current time in your shift register.

  -Online N => subtract the time current less time shift record-online more then 5 seconds?

  => Is => keep turning on

  -Online N => turn given

• Using the thresholds the in Vision Assistant Image calibration

  

  I would like to form images of calibration with some images of 1280 x 720 of grids that I take with a fisheye lens. Usually, when I raise Calibration training Vision Assistant interface, I have some tools really powerful local thresholding as in the screenshot above.

  But with images that I put in now, I'm threshold options that aren't really my needs. These are shown in the screenshot below. Is it possible to manually choose the local threshold options?

  

  Hello

  You got this window because it seems that you have a 32 bit image instead of an image of grayscale 16 or 8-bit.

  Convert your image into 8-bit, and you'll have the threshold parameters you need.

  Hope this helps

  Agress

• detection of peak with two thresholds

  Dear colleagues!

  Excuse me, but I need example or any help for the detection of peaks with two thresholds. Namely two adjustable thresholds with detector standard Ridge for the creation of a detection bandwidth or range.

  Detector of crete have only one threshold of... But why only one...

  
  

• How to determine the threshold for an LED voltage

  A density of current over voltage that is generated by one of my Labview OLED measurement systems is attached.  I'm trying to programmatically determine the threshold voltage.  When the data is displayed in the logarithmic scale it is possible to observe a charge injection clear (0.8, 0.000203).  The problem is that I can visually observe this value, but I'm not able to solve by program for her.  I tried to take the derivative to observe the changes of slope, but only to determine the operating voltage.  Any ideas how I could solve this value?

  Thank you

  E

  You are on the right track, you just have to do deeper. Try to take the 2nd derivative and find the points where it is larger. This will show you where the log graph is concave upward and where is your ve. I've included a plot of Log (data), D (Log (data) and D (Log (Data), 2).) I also have zoomed in on the area of interest, then pay attention to the balance.

  You may need to make some good assumptions. For example, with exactly what I posted above, you get Vth = - 0.4 or so. If you assume Ve > 0, then you get Vth = 0.8.

  In addition, you probably want to do other fancy stuff such as: interpolate the data to get more points, smooth interpolation, trim the ends of the derived data (they want 0 according to your derived method).

  

  

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