Create fast intenstiy histogram without Vision toolkit

I am trying to create an intensity histogram from an 8bit gray scale image that is being acquired from a USB camera. Using the drivers that camera that came with the camera I am able to get a 2D array of image data (1021 x 764). What I am doing is concatenate all the columns in the array to create a 1d array. I then use the general histogram function that is set to a max of 256, min of 0 and 100 bins. This approach takes approx. 5 secs. to complete. Attached is my approach.
Is there a better approach that would process much faster?
If I use the Vision functions to convert the image data to an IMAQ image and then using the IMAQ histograph function, it processes almost immediately. However I do not wish to use the Vision functions because I do not wish to pay for a Vision runtime license for each installation of my application.
Thanks
Terry.
Solved!
Go to Solution.
Attachments:
Image Histogram.vi ‏14 KB

This is the simplest way to obtain a histogram. Is it fast enough?
That will give a 256-bin histogram, but I iust noticed that you want 100 bins for some reason. The easiest way to do that is to scale your image from 0-255 to 0-99 (multiply by 99/255) and do the same thing, something like this:

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