Author Topic: SI interpretation...in 3d  (Read 7321 times)

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Offline rnvinc

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SI interpretation...in 3d
« on: July 07, 2012, 04:59:32 PM »
SI interpretation is sometimes difficult for new users...this is basically because the visual perspective of the SI image is different from any sonar display we've ever seen before...

The difficulty in SI display interpretation lies in the fact that the SI display image is a 2 dimensional aspect image of a 3 dimensional underwater world...

Sonar displays are incapable of rendering a true 3 dimensional image.... (well I guess just about any display in incapable of rendering a "true" 3 dimensional image)...

So,.... the SI techno-developers decided to "bend the rules of 2 dimensional displays" and take 1 of the 3  dimensions of the physical underwater world and display it in the same "visual" plane in the SI image as the other 2 dimensions in the sonar display....

There are "3" dimension planes in the actual physical underwater world:
- 1. "Horizontal width"- (rendered into the SI image by the SI Range width that shows as "left and right" on the SI image)...
- 2. "Horizontal length"- (rendered into the SI image by the sonar history that shows as "top to bottom" of the SI image)...
- 3. "Vertical depth"- (rendered into the SI image by taking the actual vertical plane of the "water column" and laying it flat down in the same 2 dimensional plane on the sonar display as the 2 horizontal planes mentioned above...

What I have tried to do with this 3d rendering program is show how the SI unit processor takes the actual vertical "water column" in the underwater world .... and morphs that actual vertical plane data into a 2 dimensional sonar display...

It is my goal to shorten the "learning curve" of SI interpretation for new users that are having difficulty understanding the "3 dimensional underwater world" as seen on the "2 dimensional sonar display's SI image"...

As you watch this video... Keep your eyes trained on the sunken barge in the right SI beam as the "water column" morphs from the 2 dimensional sonar display image to the actual vertical plane of "water depth" in a 3 dimensional visual aspect ....and then the morphs back into the 2 dimensional SI image...

si 2 Copy


Rickie
« Last Edit: July 07, 2012, 05:01:20 PM by rnvinc »


Offline newkid4si

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Re: SI interpretation...in 3d
« Reply #1 on: July 08, 2012, 12:19:26 AM »
Rickie

  Very nicely done. You are very talented.
  The link to the YouTube video is easy to miss in the blue color.
  It's about an inch above Rickie's name if your looking and can't spot it.

              Mike

Offline sonar2000

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Re: SI interpretation...in 3d
« Reply #2 on: July 08, 2012, 08:38:12 AM »
Great work Rickie.  This tells a great story.....
You might post the video as an Article and Tutorial subject..

chuck

Offline rnvinc

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Re: SI interpretation...in 3d
« Reply #3 on: July 08, 2012, 07:16:07 PM »
Rickie

  Very nicely done. You are very talented.
  The link to the YouTube video is easy to miss in the blue color.
  It's about an inch above Rickie's name if your looking and can't spot it.

              Mike

Now that's odd... I could have sworn I embedded that youtube video correctly...

Chuck ... You got any idea why it's not showing the embed in the forum..??
(It posted and viewed correctly several times after I first posted it)...

Rickie

Offline sonar2000

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Re: SI interpretation...in 3d
« Reply #4 on: July 08, 2012, 07:28:35 PM »
Rickie, let me look and see.

Chuck

Offline sonar2000

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Re: SI interpretation...in 3d
« Reply #5 on: July 08, 2012, 07:31:20 PM »
Rickie, on your picture here on the forum, which runs ok take a look at the picture and on the bottom right corner where it says YouTube double click on that little icon and it will take you to the youtube and then run.

Chuck. 

Offline newkid4si

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Re: SI interpretation...in 3d
« Reply #6 on: July 08, 2012, 10:12:43 PM »
Rickie &  Chuck

          I'm sorry. My error. On my computer I have the NoScript program.
          I apparently had the YouTube link blocked. Where the link is was blank on my computer. I only saw a small--- si 2 Copy --- in blue above his name.
          Enabling  googleapis.com  corrected it. I can now see the link.

                            Mike

         

Offline sonar2000

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Re: SI interpretation...in 3d
« Reply #7 on: July 09, 2012, 11:37:41 AM »
OK, you are da man.   I could get to the youtube with the double click but that may be an alternate way. 
Glad you figured it out. And for adding the comment here.

Chuck

Offline rnvinc

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Re: SI interpretation...in 3d
« Reply #8 on: July 09, 2012, 02:35:03 PM »
I will get this OP into the "Articles and Tutorials" as soon as I get the updated video ...

A user on another forum pointed out to me that the "Dark water column" rectangles should create a smaller gap between the the 2 outer "SI bottom coverage" rectangles when the 2 "Dark water column" rectangles end in the 3d vertical visual aspect...(giving the watcher a deceiving interpretation of the distance between the 2 "SI bottom coverage" rectangles)...

I will be reworking the video so that the 3d vertical visual aspect will "almost" look like "Contour Mode On"....

I am reworking the video to hopely eliminate this possible deceiving aspect of the 3d visual aspect when the water column is vertical....

Rickie 
« Last Edit: July 09, 2012, 02:40:53 PM by rnvinc »

Offline sonar2000

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Re: SI interpretation...in 3d
« Reply #9 on: July 09, 2012, 02:50:32 PM »
The water column can be a bit deceiving at times and yet at another time is helps.
We were on a search last week and we used both displays to locate.
It was interesting.

Chuck

Offline ClemsonBloz

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Re: SI interpretation...in 3d
« Reply #10 on: July 15, 2012, 08:39:00 AM »


When you smash the two images together and push the water colum up(to where it represents the actual water under the boat,, it does make way more sense..


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