Author Topic: what's the small horirontal line on picture  (Read 3185 times)

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Offline abraquelebout

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what's the small horirontal line on picture
« on: September 18, 2010, 04:03:27 AM »
hi
i join a picture take on river for a survey
there's lot of horizontal small line on it and i don't know why
i hope a small vibration...
this picture is at 800 khz
i join the same in 455
rickard do you have an idea?
this picture is take by a 898 si


Offline Humminbird_Greg

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Re: what's the small horirontal line on picture
« Reply #1 on: September 18, 2010, 08:50:21 AM »
Question: do these horizontal lines show up when viewed on the unit or is this only when viewed with the DeepView software?

Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline Rickard

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Re: what's the small horirontal line on picture
« Reply #2 on: September 18, 2010, 11:11:29 AM »
I think the lines are difficult to see. If this is your main interference problem, I think you are lucky. My images usually show a lot of various sorts of defects, most of them are interference caused by the engine. Did you use the towfish and the long cable at this occasion?

Rickard

Offline abraquelebout

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Re: what's the small horizontal line on picture
« Reply #3 on: September 18, 2010, 02:58:22 PM »
hi every body
in this sequence i use towfish , 60 meter of cable .
there is only 6 m over the boat and the rest in large   buckle on a aluminium boat.
i don't see the interference on the 898, the sreen is smaller than the 1197. i just remark them on deepview. i havent see this small line before
may be electric or eletromagnétic ?

Offline RGecy

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Re: what's the small horirontal line on picture
« Reply #4 on: September 19, 2010, 06:59:24 PM »
It may be from using the HBSI converter.  I use a filter in the program to clear up the center water column and that may be what you are seeing in your images.

I can eleiminate it, but there is a lot of clutter.

Robert
Humminbird Guru and Forum Administrator

Offline abraquelebout

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Re: what's the small horirontal line on picture
« Reply #5 on: September 20, 2010, 04:42:14 AM »
thank's a lot
yes in deepview this lines come when i use "Color mapping wizard"
but i think there's propeller noise or motor.
in the next archological survey i take care of this.


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