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Which filter ladder to use with noisey grey-image for Finger(tip) detection

asked 2015-12-08 01:57:06 -0500

Massis gravatar image

Hi there,

Attached you will find a picture shot with my camera system. I would like to detect the finger (right hand side of the picture), therefore I think I need to ramp up that picture quality.

->Image which has to be improved!<-

I got best results with Bilateral Blure + Threshold, although best doesn't mean a good or satisfying one. Does someone have an working idea for a filter ladder to get an better image for finger detection out of the given picture? (C/C++ prefered :) )

Sidenote: It has to be running in real time on a Laptop, due to it being a camera stream.

Thanks for your time & help!

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If this is a depth image, it seems that your finger is close to the maximum range of your camera and thus not that easy seperable? How about looking for the min and max depth value and rescaling it between 0-255 to get better contrast?

StevenPuttemans gravatar imageStevenPuttemans ( 2015-12-08 03:28:13 -0500 )edit

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answered 2015-12-16 08:41:08 -0500

Massis gravatar image

I used an Gaussian 5x5 followed by an adaptive OTSU Threshold filter, works like a charm now! :) Rescaling didnt help besides the picture beeing easier to interpret for human eyes.

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Asked: 2015-12-08 01:57:06 -0500

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Last updated: Dec 16 '15