needing help in algorithm
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I know this way but it is a lot of noise in image and the plus isn't like this : ------------o-------- -----------ooo------- ------------o-------- it is like this : -----------------------o----------- -----------------------o----------- -----------------------o----------- ---------------o o o o O --- o o o o ---------------------o------------ ----------------------o----------- ----------------------o----------- ----------------------o----------- and the most important is that it may rotate . and i dont want to rotate it in a ( for ) I want it to be a speedy algorithm . and i also want to use the long tail of plus , I mean it isn't one pixel . thanks -- modified at 10:19 Thursday 11th May, 2006
You can use 2D-fft (or 2D convolution/correlation). It will work also if there is a rotation on the plus (i.e. there is only a phase rotation) or if there is a scale factor (i.e. the ratio between frequency amplitudes remains constant),..... but they aren't
V_shr wrote:
speedy algorithm
If you want a good and fast way ,probally, your work will be very hard! Try also something using some pre-processing operation, like noise filters and/or colors thresholds(-> RED plus) Hope it helps
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hello all I need to find a red " + " in a image and i want a good algorithm . thank you -- modified at 9:48 Thursday 11th May, 2006
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hello all I need to find a red " + " in a image and i want a good algorithm . thank you -- modified at 9:48 Thursday 11th May, 2006
Good luck; you'll need it. That's a sophisticated algorithm you're after. I suggest you get a good book on digital processing and don't expect results too quickly. Steve
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You can use 2D-fft (or 2D convolution/correlation). It will work also if there is a rotation on the plus (i.e. there is only a phase rotation) or if there is a scale factor (i.e. the ratio between frequency amplitudes remains constant),..... but they aren't
V_shr wrote:
speedy algorithm
If you want a good and fast way ,probally, your work will be very hard! Try also something using some pre-processing operation, like noise filters and/or colors thresholds(-> RED plus) Hope it helps
_Russell_ wrote:
Try also something using some pre-processing operation, like noise filters and/or colors thresholds(-> RED plus)
Good!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers, Alok Gupta VC Forum Q&A :- I/ IV
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Humm...
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers, Alok Gupta VC Forum Q&A :- I/ IV
ThatsAlok wrote:
Humm...
pardon dear ? what's up ?
TOXCCT >>> GEII power
[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]
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ThatsAlok wrote:
Humm...
pardon dear ? what's up ?
TOXCCT >>> GEII power
[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]
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toxcct wrote:
pardon dear ?what's up ?
oops sorry! wrong person :)
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers, Alok Gupta VC Forum Q&A :- I/ IV