Re: Re: image opacity/image overlaying?
- To: mathgroup at smc.vnet.net
- Subject: [mg80210] Re: [mg80165] Re: image opacity/image overlaying?
- From: Murray Eisenberg <murray at math.umass.edu>
- Date: Wed, 15 Aug 2007 04:08:29 -0400 (EDT)
- Organization: Mathematics & Statistics, Univ. of Mass./Amherst
- References: <f9p5ut$rm2$1@smc.vnet.net> <200708141058.GAA08636@smc.vnet.net>
- Reply-to: murray at math.umass.edu
And one can show a nice "fade" transitional effect with:
Manipulate[
Show[{
Graphics[{Opacity[1-c],img1[[1]]}],
Graphics[{Opacity[c],img2[[1]]}]
}],{c,0.01,1}
]
Mariusz Jankowski wrote:
> This doesn't use ArrayPlot, but works for 2D image arrays. Given two images,
> for example,
>
>
> img1 = Import[
> "http://www.ee.usm.maine.edu/courses/ele489/data/cameraman.tif"; ] ;
>
> img2 = Import[
> "http://www.ee.usm.maine.edu/courses/ele489/data/face.tif"; ] ;
>
>
> then this gives the desired result
>
>
> Show[{img1, Graphics[{Opacity[0.5], img2[[1]]}] }]
>
>
>
> Bye, Mariusz
>
>
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>
>>>> On 8/13/2007 at 4:49 AM, in message <f9p5ut$rm2$1 at smc.vnet.net>,
> AV<akvelu at gmail.com> wrote:
>> Is there a way of overlaying a partially transparent 2D image array on
>> another 2D image array using ArrayPlot or ListDensityPlot? I am
>> currently using a workaround by making an array of transparent points
>> and showing this on top of a ListDensityPlot graphics but I wanted to
>> check if there was a better way since this is very slow.
>>
>> AV
>
--
Murray Eisenberg murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower phone 413 549-1020 (H)
University of Massachusetts 413 545-2859 (W)
710 North Pleasant Street fax 413 545-1801
Amherst, MA 01003-9305
- References:
- Re: image opacity/image overlaying?
- From: "Mariusz Jankowski" <mjankowski@usm.maine.edu>
- Re: image opacity/image overlaying?