[CinCV TNG] [impr] FindObject

Sam cinelerra at posteo.de
Fri Apr 13 19:49:10 CEST 2018

That's a good explanation, it makes sense.


On 13.04.2018 19:14, Phyllis Smith wrote:
>     I noticed that the FindObj plugin is much smaller. Before it was
>     about 46 MiB and now it is about 6 MiB. Maybe that's why the file
>     got smaller. GG seems to have cleaned up the plugin a bit.
> He found the issue with the size and reported a Gaussian SEGV to the 
> OpenCV website which was related to the size because he removed the 
> library causing the SEGV but not being used in findobject.
>     The problem with the thickness of the line still exists. I made a
>     short video, you can see that the frame disappears completely
>     again and again.
> Now we know specifically which line algorithm is giving you the 
> problem.  I don't know why it is not an issue for us as we have fairly 
> decent monitors - just not 4K.  At one time the Motion plugins when 
> "Draw vectors" was turned on, had disappearing lines even on our 
> monitors but I will have to check to see if that is still true.  If I 
> understand gg correctly, the lines you show are only 1 pixel and they 
> get "aliased/anti-aliased" so can become invisible.  Apparently, the 
> fix is not as simple as making the line wider.
>     A small suggestion, if it were technically feasible. If the check
>     mark at the scene option (Drag) is set and I set the check mark at
>     object box (Drag), then the check mark at scene disappears
>     automatically. It's just an idea, if the implementation isn't too
>     complicated. I can well imagine that some users might be confused
>     if they realize that they can't check the box because they don't
>     have the background information for this feature.
> I don't think I stressed this enough earlier -- there is ONLY ONE drag 
> box.  So I do not think turning off the other one which is on, is what 
> a user would necessarily want and might lead to even more confusion.  
> For example, you have the Title plugin in a small section of the video 
> with Drag turned on.  Now you have Findobject plugin on the whole 
> track and you try to turn Drag on, but it flashes at you to let you 
> know Drag is already on somewhere else.  Either way It is going to be 
> confusing. I will make a big warning about it in Features5.pdf in the 
> Title and Findobject descriptions.  The moral of the story is DO NOT 
> LEAVE DRAG BOXES CHECKED when you are done with them.  Furthermore, we 
> expect future use of Drag boxes elsewhere.  I think the convenience is 
> more than worth the confusion (at least I hope so).
> BTW, before if you accidentally left the Drag box checked in the Title 
> plugin and did a render, the ugly box would show.  A good side effect 
> of the draw box widget is that if you forget to turn it off, it no 
> longer shows up in the render (much better).
> gg/phyllis (we will catch up with other recent issues from the last 
> week soon).
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