I need to convert analog In to gray scale. How?

[ChillyWilly]

Hello,

I have a program that controls some steppers and collects analog signal (0 to 1 volt dc).  I would like to convert the signal to a picture by using the (x,y) position of the steppers and the analog signal.  How do I map the analog in to grayscale and what image sub-vi's can I use to make the image.

Thanks,

[mfitzsimons]

Use the picture controls.  You can add points at any X,Y location, control the size and the color.  You will need to use some method to map the voltage to a color.  Should work fine for your application.

[ChillyWilly]

I've used the draw a point sub VI.  Its the maping of my signal to grayscale that I need some tips on.  I've tried to do a defined table mapping bu it did not work as expected the defined values were the equivalent RGB values betwen 0 0 0  and 255 255 255 in 25 increments.  I think that for gray scale the R, G and B values should be the same bu I ended up with color pixels I think its due to the interpolation between points. 

Well needless to say I still need help, if anyone knows a simpler way I would appreciate it.

[mfitzsimons]

See attached example on how to do grayscale.

[ChillyWilly]

FINALLY FIGURE OUT A WAY TO DO WHAT I WAS TRYING TO DO.

HERE IT IS I HOPE THIS HELPS OTHERS IN THE FUTURE.

[ChillyWilly]

THANK YOU Matthew Fitzsimons

SEEMS LIKE WE WERE WORKING ON THIS AT THE SAME TIME.  I WILL STUDY YOUR VI AND SEE WHAT YOU HAVE DONE.

THANKS AGAIN.

[mfitzsimons]

I would of sent it sooner but internet connection went down.  We will call it a tie.

[ChillyWilly]

IF YOU HAVE A WAY TO GET RID OF THE FLICKER WHEN UPDATING THE PICTURE PLEASE LET ME KNOW.  THIS IS MINOR, BUT COULD BE ANOYING IN LARGE IMAGES.