Thanks Josh. I actually would normally do it that way, but I stumbled on this behavior when we were trying to build filters. For example, scale the red channel by 50% via multiplying by (0.5, 1, 1). Just curious what's going on, and why multiplcation by (1,0,0) doesn't work. On Thu, Mar 26, 2015 at 7:31 PM, Adam Hughes <hughesadam87@gmail.com> wrote:

I don't think the image came through. Let me attach it

On Thursday, March 26, 2015 at 7:16:12 PM UTC-4, Adam Hughes wrote:

...

I'm trying to build a filter to show only the red channel in the lena image. I defined two masks:

(1,0,0) (255,0,0)

Oddly, the (255,0,0) gives me the correct plot when doing imshow(), but (1,0,0) doesn't. Why does the (1,0,0) mask lead to light regions being dark and dark regions being light? Here's a working example:

%pylab inline from skimage.data import lena

lena = lena()

f, (ax1, ax2) = plt.subplots(1,2, figsize=(8,6))

ax1.imshow(lena*(1,0,0)) ax2.imshow(lena*(255,0,0))

--

You received this message because you are subscribed to a topic in the Google Groups "scikit-image" group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/scikit-image/JzmfEbBJKYU/unsubscribe. To unsubscribe from this group and all its topics, send an email to scikit-image+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/d/optout.