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General Discussion / Re: Create long exposure images from videos

« Last post by FileRabe on November 05, 2024, 21:31:45 »

if aknyone could send me to a more convenient way to use the align feature https://wiki.panotools.org/Align_image_stack

i hit

Quote

C:\Users\strig\Pictures\102CANON\LRTimelapse\LRT_MVI_0887>"align_image_stack.exe" -a *.jpg

in the terminal but without fine control, i saw align_image_stack.exe running in the task manager, wait more than 30mn (i'm on a 12th Gen Intel(R) Core(TM) i7-12700H 2.70 GHz with64Gb ram and intel irisx and nvidia GF rtx3060 laptop) and had to stop the process a hour after.

General Discussion / Create long exposure images from videos

« Last post by FileRabe on June 04, 2024, 21:49:14 »

With the idea of doing false long exposure as found here:

I have a set of 934 images extracted from a 30-second video at 29 FPS.
I tried the Photoshop method, but it is time consuming and too slow, so i went with method two and three,
I'm not very comfortable with programming, but I know how to use the terminal a little bit.

Normally the commands looks like that:

Code: [Select]

cd C:\Users\strig\Videos\Sequence  
align_image_stack -a *.jpg 
# or
align_image_stack -a 1001.jpg 1002.jpg 1003.jpg ....

With my terminal command, I get this:

So i am a bit confused, hope you can clarify me.

HUGIN GUI Discussion / HUGIN EXPERT 8.5 - Export Beliefs issue

« Last post by Marko Gerbec on January 26, 2024, 15:33:11 »

As a happy user of a rather old 8.5 version, I found that GUI command Export Beliefs visualizes and also exports to .csv file nodes belief data rounded to 0 if figure is bellow about 0.001 % (1e-5) and rounds to 1 of above about 0.99999. That is problem for my models (low probability events) if exporting final results and do a post processing. Is this a bug, or? Any workaround?
Was that solved in later versions?

HUGIN GUI Discussion / Entering different evidence

« Last post by Holly on August 14, 2023, 23:34:40 »

Hi,

I have a set of data that represents information on dams (see attached txt). I am interested in modelling how the dam `Status_ID` and `Raise_ID` affect probabilities of failure, and the type of failure mode (`FM`) if it does fail. I use the EM learning algorithm to add experience data from the csv to all the nodes (see attached network).

I want to incorporate the fact that I know I have an unbalanced dataset (failures are overrepresented) and that a true overall failure rate (for all types of `Status_ID`, `Raise_ID` and `FM`) is 2E-4. How do I best incorporate this knowledge in this network? I've tried 1) entering it as a likelihood in 'Run' mode or 2) entering it as a prior before adding experience data.

This is an example of how I would use Bayes equation by hand:
P(Failure=Yes | Status_ID="Active" & Raise_ID="Upstream") = P(Status_ID="Active" & Raise_ID="Upstream" | Failure="Yes")*P(Failure="Yes") / P(Status_ID="Active" & Raise_ID="Upstream")
where P(Failure="Yes") = 2E-4, and other probabilities come from the data

Appreciate any help!

Thanks

General Discussion / Re: Parameter Selection and Cross-Validation

« Last post by Anders L Madsen on August 02, 2023, 16:49:55 »

Hello Holly,

We do not have a tutorial showing the process for performing feature selection for a Bayesian network.

If we assume that you are considering a classification problem, then one approach is a wrapper search. Start with a model containing only the target variable and iteratively adding the feature which improves the score the most. Stop when there is no further improvement.

You can split the data into train, validate and test sets to measure the performance.

Best regards
Anders

General Discussion / Parameter Selection and Cross-Validation

« Last post by Holly on August 01, 2023, 22:31:51 »

Hello,

Are there any tutorials or examples that outline a process for performing parameter selection for a Bayesian Network? (i.e. test different subsets of potential input variables and find the subset that gives the best model performance evaluated using something like k-fold cross validation, for example).

HUGIN GUI Discussion / Bug with control points zoom

« Last post by PaN00B on June 26, 2023, 07:54:09 »

For circular fisheye lens when adding control points it shows zoom window, in the center of image its okay, but towards the very edge of circular fisheye lens zoom window shows wrong portion than where i click for control point of the image.

Bug only appears if image is set.
Lens Type: Circular Fisheye
Focal length: 1.2
Focal length multiplier: 4.099

2022.0.0.9bb147ae7161 built by Thomas

HUGIN GUI Discussion / Crop window bug

« Last post by PaN00B on June 26, 2023, 06:45:48 »

First problem i create panorama from image, after opening image and going to Masks i see the image loaded, then i create new project without saving previous one and load new image, on the Photos tab i see the new image, however when i go to Masks tab and click on image, it still shows the preview of first image from previous project that is no longer open.

Second problem in Masks > Crop if i click anywhere on the image mask disappears and i have to select image again to show it.

2022.0.0.9bb147ae7161 built by Thomas

General Discussion / Re: Parameter Learning

« Last post by Anders L Madsen on June 17, 2023, 05:19:30 »

Hi Marco,
You can run the EM learning Wizard that has the option to reset all tables and all experience counts.
Best regards
Anders

General Discussion / Parameter Learning

« Last post by MarcoGV on May 19, 2023, 18:25:58 »

I have a rather large model built (using structure learning in Hugin) using a large dataset. I would like to use the same structural model with different data. For this particular case, I would like to ignore all parameter values learnt from the large dataset. EM learning starting from the structure with all 1s in the CPTs and zero experience counts seems to be the way to do it, but I do not want to manually replace all experience counts with zero and all entries in the CPTs with 1. Is there a way to reset CPT entries in bulk?