RoboRealm Forum

No Title

Tue, 30 Nov 1999 00:11:00 EST

Thanks STeven--that's exactly what I needed. As for the ANN stuff, for the moment I am just using a Perceptron with the Delta Rule but I have Backprop waiting in the wings in case I need a multi-layered network. I've been using the open source AForge.NET package from http://www.aforgenet.com/ which is really nicely written and easy to use (as you may already know!).

--patrick

No Title

Tue, 30 Nov 1999 00:11:00 EST

The a and b values are scaled to a range of 255 and moved to 128. I.e if the value you get from a or b channel is 128 that is actually 0, 120 would then be -8 and 135 would be +7. Thus you can just do a - 128 to get the negative value back.

What kind of ANN are you using? Backprop?

STeven.

A question about the LAB_Channel module

Tue, 30 Nov 1999 00:11:00 EST

Hello,

I need to use the L, a and b values from the LAB_Channel module as inputs to an artificial neural network. As I understand it, the a and b values can take on both negative and positive values. Does the RoboRealm API return the negative values if I do a getImage() after applying the LAB_Channel module? Putting it another way, how can I get the negative values as well as the positive values?

Thanks!
patrick