Re: RGB to 32 Bit Gray

> I tried your Macro (IJ 1.35g, Windows XP). It worked however the 
> resulting 32 bit gray image turned out to be inverted,a matter of byte 
> order??

The newImage() function was creating an image with an inverting lookup 
table. Adding 'black' (fill with black) to the second argument fixes 
the problem. Here is the updated macro.

   if (bitDepth!=24)
       exit("RGB image required");
   setBatchMode(true);
   w = getWidth;
   h = getHeight;
   rgb = getImageID;
   newImage("32-bit", "32-bit black", w, h, 1);
   float = getImageID;
   for (y=0; y<h; y++) {
       showProgress(y, h);
       for (x=0; x<w; x++) {
           selectImage(rgb);
           v = getPixel(x,y)&0xffffff;
           selectImage(float);
           setPixel(x, y, v);
       }
   }
   resetMinAndMax;
   setBatchMode(false);
   //run("16-bit");

-wayne