HSL to RGB in LV

[thevoiceover]

I am curious on if anyone has anything that could convert HSL to RGB for me that I could run in some LabVIEW code.. I could have sworn I had a .dll way back that did this, but I can't find it... I couldn't find anything in LV that did this either... I am running 7.1.1

[siva]

QUOTE(thevoiceover @ Oct 4 2007, 12:48 AM)

I am curious on if anyone has anything that could convert HSL to RGB for me that I could run in some LabVIEW code.. I could have sworn I had a .dll way back that did this, but I can't find it... I couldn't find anything in LV that did this either... I am running 7.1.1

You could build your own .dll or SubVI using the standard conversion formula available at, http://en.wikipedia.org/wiki/HSL_color_space

[Neville D]

There are functions in the IMAQ Vision tool-kit from NI that allow you to do that and much more. It is expensive, though.

Neville.

[Thang Nguyen]

[thevoiceover]

QUOTE(Neville D @ Oct 4 2007, 10:54 AM)

There are functions in the IMAQ Vision tool-kit from NI that allow you to do that and much more. It is expensive, though.

Neville.

Yes and I am broke.... Oh well..

[PJM_labview]

QUOTE(thevoiceover @ Oct 30 2007, 03:51 PM)

Yes and I am broke.... Oh well..

Use the following code to write your own "HSL to RGB.vi" in LabVIEW. It does not take that long.

/******************************************************************************   FUNCTION: HLStoRGB   PURPOSE:	 Convert from HSL to RGB   IN:		 Hue, Saturation, Luminance from 0 to 1   RETURN:	 RGB color (0xRRGGBB)   COPYRIGHT:1995-1997 Robert Mashlan			 Modified for LabWindows/CVI, 1999 Guillaume Dargaud ******************************************************************************/ typedef unsigned char  BYTE;		// 8-bit unsigned entity  COLORREF HLStoRGB(const double H, const double L, const double S ) {	 double r,g,b;	 double m1, m2; 	 if (S==0) r=g=b=L;	 else {		 if (L <=0.5) m2 = L*(1.0+S);		 else		 m2 = L+S-L*S;		 m1 = 2.0*L-m2;		 r = HueToRGB(m1,m2,H+1.0/3.0);		 g = HueToRGB(m1,m2,H);		 b = HueToRGB(m1,m2,H-1.0/3.0);	 }   return MakeRGB((BYTE)(r*255),(BYTE)(g*255),(BYTE)(b*255)); }/******************************************************************************  FUNCTION: HueToRGB  PURPOSE: 	Convert a hue (color) to RGB  COPYRIGHT:1995-1997 Robert Mashlan			Modified for LabWindows/CVI, 1999 Guillaume Dargaud******************************************************************************/static double HueToRGB(const double m1, const double m2, double h ) {	if (h<0) h+=1.0;	if (h>1) h-=1.0;	if (6.0*h < 1  ) return (m1+(m2-m1)*h*6.0);	if (2.0*h < 1  ) return m2;	if (3.0*h < 2.0) return (m1+(m2-m1)*((2.0/3.0)-h)*6.0);	return m1;}

PJM

[Tim_S]

This what you're looking for?

QUOTE(thevoiceover @ Oct 3 2007, 02:18 PM)

I am curious on if anyone has anything that could convert HSL to RGB for me that I could run in some LabVIEW code.. I could have sworn I had a .dll way back that did this, but I can't find it... I couldn't find anything in LV that did this either... I am running 7.1.1