about image processing

[PKIM]

Hi there,

  I am looking for a way to render an image in pseudocolor image like that plotted by pcolor in matlab. But in labview 2013 I installed, I only see the Graph toolbox to plot the 2D graph. Is there any way I could plot that image (in ASCII format). Thanks.

[GerdW]

Hi PKIM,

what is an "image in ASCII format"?

Anyway you could use IntensityGraphs to show images in pseudocolor…

[PKIM]

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@GerdW wrote:

Hi PKIM,

what is an "image in ASCII format"?

Anyway you could use IntensityGraphs to show images in pseudocolor…

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Sorry for the confusing. Some camera will save the image with each pixel stored as an ASCII code. Or in other case, the each pixel (inlcuding info for R, G, B) could be stored as a number separated with a delimiter. In matlab, we use dlmread to  read the file.

[PKIM]

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@GerdW wrote:

Hi PKIM,

what is an "image in ASCII format"?

Anyway you could use IntensityGraphs to show images in pseudocolor…

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By the way, I just try IntensityGraphs and it does show me some graph but the color map is plain. How can I change the color map so to show different color scales? Thanks.

[GerdW]

Hi PKIM,

to change the colors (aka z axis) of the IntensityGraph you use property nodes of the graph…

[PKIM]

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@GerdW wrote:

Hi PKIM,

to change the colors (aka z axis) of the IntensityGraph you use property nodes of the graph…

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I try to change the scale on the z axis but that's only change the brightness or the color. I am looking for a way to change the interploate color mapping. As default, it make the maximum value close to white and the minimum value close to black. But how can I make it arbritary color mapping like make the maximum one red and the minimum value black?

[0utlaw]

Hello PKIM,

I believe this KnowledgeBase article has the information you're looking for:

KnowledgeBase 386GKQGP: How Can I Change the Color on an Intensity Graph or Chart?

http://digital.ni.com/public.nsf/allkb/1ADFF221E27F5B5886256E6F007C7B58

A little searching can get you pretty far!

Regards,