Strange in Intensity Graph

[Feng-Yin Chang]

Hi all,

I'm trying to review our image data grabed by CCD camera.
The image data is a 2D array and each value stands for the gray value
read on the pixel.
I use both mathematica and LabVIEW to see the same image data, but the
results are different. LabVIEW seems to give a result with rotated
graph(90 degree). Does anyone know what happened to my program?


Regards,
F.Y.Chang

[C.A.H.]

Are you using Labview to read in the 2D array from a spreadsheet program or is it connected directly to the camera? If you are reading it from a spreadsheet you might try transposing the array.

[Marco Tedaldi]

Feng-Yin Chang wrote:

> Hi all,
>
> I'm trying to review our image data grabed by CCD camera.
> The image data is a 2D array and each value stands for the gray value
> read on the pixel.
> I use both mathematica and LabVIEW to see the same image data, but the
> results are different. LabVIEW seems to give a result with rotated
> graph(90 degree). Does anyone know what happened to my program?

The Intensity-Graph is a Graph. The coordinate-system of this starts in
the lower, left corner with 0,0, while Images normaly start with 0,0 in
the upper, left corner. This normally flipps your image vertically.
2-D Array can be transposed, so that the axes are changed. You can solve
this by just right-clicking on the graph on the frontpanel and select
"tra
nspose array" in the context-menu.

I hope this helps

Marco

[Feng-Yin Chang]

Hi,
The 2D array was read from a spreadsheet.
But I want to know why the result shows the transposing one. 🙂



Feng-Yin Chang,
Institute of Physics,NCTU,Taiwan


On Tue, 13 Jul 2004, C.A.H. wrote:

> Are you using Labview to read in the 2D array from a spreadsheet
> program or is it connected directly to the camera? If you are reading
> it from a spreadsheet you might try transposing the array.
>