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POFinding the height above water level of rocks
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Id
4735650
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AnswerCount
3
ClosedDate
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CreationDate
2011-01-19T13:14:39.253
FavoriteCount
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2011-01-20T17:21:31.397
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2011-01-19T14:47:31.517
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Score
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ViewCount
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LastEditorDisplayName
text
Body
I am currently helping a friend working on a geo-physical project, I'm not by any means a image processing pro, but its fun to play around with these kinds of problems. =) The aim is to estimate the height of small rocks sticking out of water, from surface to top. The experimental equipment will be a ~10MP camera mounted on a distance meter with a built in laser pointer. The "operator" will point this at a rock, press a trigger which will register a distance along of a photo of the rock, which will be in the center of the image. The eqipment can be assumed to always be held at a fixed distance above the water. As I see it there are a number of problems to overcome: <ol> <li>Lighting conditions <ul> <li>Depending on the time of day etc., the rock might be brighter then the water or opposite.</li> <li>Sometimes the rock will have a color very close to the water.</li> <li>The position of the shade will move throughout the day. </li> <li>Depending on how rough the water is, there might sometimes be a reflection of the rock in the water.</li> </ul></li> <li>Diversity <ul> <li>The rock is not evenly shaped. </li> <li>Depending on the rock type, growth of lichen etc., changes the look of the rock.</li> </ul></li> </ol> Fortunateness, there is no shortage of test data. Pictures of rocks in water is easy to come by. Here are some sample images: <img src="https://i.stack.imgur.com/zrXpj.jpg" alt="alt text"> I've run a edge detector on the images, and esp. in the fourth picture the poor contrast makes it hard to see the edges: <img src="https://i.stack.imgur.com/8W8oB.png" alt="alt text"> Any ideas would be greatly appreciated!
Tags
<image-processing><computer-vision>
Title
Finding the height above water level of rocks
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1. PO
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PostTypePostTypeId
1. PTQuestion
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1. USTheodor
UserOwnerUserId
1. USTheodor
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 POFinding the height above water level of rocks
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 POFinding the height above water level of rocks
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