PIVLab Warning?

[Vikram]

Dear Sir, I get this message when I run PIVLab from within MATLAB:

Image Processing Toolbox not accessible! PIVlab won't work like this.
A license has been found, but the toolbox could not be accessed.
This is not a PIVlab related issue. Before you can use PIVlab, you need to make sure that the following command can be run without error message from the MATLAB command line:
"J = adapthisteq(rand(8,8))" (enter this without quotes)
 
Press any key to continue... (but remember, PIVlab won't work like this...)
-> Running without parallelization (no distributed computing toolbox installed).
-> Start up path: C:\Users\v\Desktop\PIV DATA\SampleImages\SampleImages
-> Got default settings from: C:\Users\v\AppData\Roaming\MathWorks\MATLAB Add-Ons\Apps\PIVlab\PIVlab_settings_default.mat
-> You have the latest PIVlab version.

But I am able to access the software and it runs.

Is this an error, such that I must reinstall the Add-On, or can I continue working?

Thank you!

[William Thielicke (Shrediquette)]

Have you done what the warning message tells you? What is the result?

[Vikram]

Hello, Yes I was able to download the Image Processing Toolbox, and the issue didn't appear.
I was confused as it was the first time I opened the software after months, and I didn't recall that issue last time.

Thank you.

[Vikram]

Hello Dr Thielicke,

I tried using the settings you mentioned in your videos, for a 2D Planar PIV of a UAV model.

I notice a lot of unnecessary vectors (in red) that appear as I post process the image.

I remember filtering them by refining the velocity limits, and only the black vectors were present after that.

But after I post process them, I can see a lot of those red ones. 
Can you suggest if I am doing something incorrect?

Thank you very much,

Vikram

On Monday, August 21, 2023 at 3:05:14 PM UTC+1 tras...@gmx.com wrote:

[Vikram]

Never mind, I was able to correct it using the auto scale vectors option!

Dr Thielicke, could you please let me know if this is image data of vectors is of good resolution ?

[William Thielicke (Shrediquette)]

Hi, without seeing the raw image data it is hard to judge. But this looks a bit like it is only noise and measurement artifacts instead of flow velocities.

[Vikram]

Hello Sir, 

Thank you for the reply.

I understand. I have mounted the UAV model inverted, and I am interested in the left (UAV's wake ) and bottom (UAV's top surface) flow characteristics.
I have attached a raw image (left), and one with image parameters set (right) for  reference.

I can see the particle density is concentrated in one region, and this is where I mainly want to measure the flow.