Hi,

I think the title says it all. I'm programing in c++ and I have and double array of floatingpoint values, like so; What is the best way of convering this in to an grayvalue Image? Any help will be appreciated

How the float values is used in this case? A single value cannot probably cannot capture a RGB model or a HSV model, right?

Well like I said, it's gray value, so every element represents a certain amount of "grayness". I could transform this matrix so that the highest value is a 1 an lowest is a zero. The values in between can be streched accordingly. The zero could be completly black and one white. And the values in between shades of gray.

You did not said it is already in gray value. You said you want to convert the array into a gray value image.

So, is it actually a question about an image format ? You want to know what structure to represent a gary value image?

No the thing is I have never done any thing like this, so I bearly know what I'm talking about
Anyway, to put it very simply, I have a matrix with floating point values. I want to generate an image in which the element with the highest value is an white in the corresponding pixel in the image. In the same way, I want the element with the lowest value to be an black in the image.
Knowing how to represent a grayvalue image would be a good place to start. How for example to I make an grayvalue bitmap with such an floatingpoint array?

So, I guess we can break down the issue in two part:
1) how to normalise the float value into gary value in integer
2) how to use this values in a particular image format

The first one is not too hard.
Set a scale of gary value says 0 - 255
then find the lowest and highest float value in the array and then

res = (float value - lowest)/(highest - lowest) * (255)

Then you have to know about the target image format. Since I use Qt, so QImage can be used as an example. (http://doc.trolltech.com/3.3/qimage.html) But afterall you must choose which format you wanna use.

Unfortunately I have to step out now, so let's see how far you got when I'm back.

Thanks dude!