Problems with a digital slide switch.

Hi all

First off thank you in advance for your help.  Here's a description of my problem.

I try to use a digital slide switch to adjust my z-scale on a graph of intensity.  I use several images to create a high dynamic range (HDR) image and having a slide for my z-scale to adjust it on the fly is much easier to use then manually punching in numbers.  My problem is that I'm covering about 7 or 8 orders of magnitude from min to max in my z scale.  So I need, in order to see all the data in the HDR, the slide image to cover the range of the min max value of the image.

When I put the mapping scale logarithmic slide, so I can more separation in the values and see and scale through the easier lower end, scaling is automatically truncated to onle 3 orders of magnitude.  This does not work for me, is there a way to fix this?

Example:

When I put the scale to be the minimum and the maximum of z on the graph of the intensity scale in the slide.  I have values of z scale 2.47E + 7 to the max and the min 0.  The maximum value on the scale of the slide = 2.47E + 7 and the min value = 2.47E + 4.  I need the minimum value is 0.

Thank you once again,
~ Daniel DeWitte

Daniel,

Log (0) =?  Exercise left for student.

Try to set the property Z Scale.Minimum a small positive value such as 0.1 or 0.001.

I created a slider and a digital control.  The minimum slider is set to zero. The CNC is an integer ranging from 0 to 20. The maximum cursor is 10 ^ (numeric). The cursor is wired for the graphic intensity ZScale.Maximum property node.

Works very well.

Of course, I would put the changes in a structure of the event instead of writing to the nodes property on each iteration of the loop.

Lynn

Tags: NI Software

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