Proper picture display for 16 bits/ 24 bits image

Hi,
I want to use 24 bits bits display for data that is saved as 8 bits. I also want to display image which is stored as 16 bits.
Please open the attached word document, if you are willing to help me.
This document would contain the detail of what I am trying to do.
I have also attached two codes; "PD_Display_From_Spreadsheet" is the main vi and the other one is subvie.
Thanks,
DK
Attachments:
Display Coord to Motor Coord_XY.vi ‏47 KB
Labview Help.doc ‏52 KB
PD_Display_From_Spreadsheet.vi ‏186 KB

Ok, here is what I am seeing. You have a file that contains an image. The data in that file seems to be 10-bit greyscale format (from the data and what you have described it as). The image is approximatily 100x300 pixels in size.
Now, some background. The graphic VIs expect that color data is going to be in the format of 0x00RRGGBB (in hex) in a 32-bit word. Each color gets 8 bits of that word and there are 8 bits unused.
If you try to display your image which fills 0x00000XXX you will get a mostly blue/black image (which you have already observed). If you copy the XX data up to the other red and green bits you will get a grey scale image (actually a color image with only grey pixels). See the attached image. The down side of this is that you will lose data because you have a 10-bit image (greyscale). It may be benifical to copy the most significant bits of the image (i.e. bits 9:2, not 7:0). Using the flatten pixmap VI and using the 8-bit option will also loose the extra 2 bits.
If this doesn't satisfy you, you may have to look into finding a different way to display this 10-bit greyscale image. Of the top of my head I know that the Visions software would do this quick and easily.
Hope this helps
Message Edited by paulmw on 11-14-2006 07:46 AM
Attachments:
grVScl.JPG ‏21 KB

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