How to view z axis of 3d image cube with cursor

You could program it. You could make a panel with two subwindows separated by a frame guide down the middle. Subwindow one will show a 2D XY image at a specified wavelength and subwindow two your 1D spectrum. Use Ctrl+i to place a cursor on the image and make a button which updates the 1D spectrum, or if you want the fancy version a hook function that runs when the cursor is moved.

Have you done any programming in Igor already?

The Image Processing Demo experiment has a 3-views panel for visualizing 3D volumes.

File->Examples->Imaging->Image Processing Demo.

Hello JimProuty,

Thank you for your suggestions. I have tried your method, but I found these three Line profiles are still in the horizontal direction, none of them are showing the z profile.

For example, I made a 3d wave, test, and define the values equal r. Then if one of the profile are showing z axis, it should not be a horizontal line.

Please let me know if I can change the direction of the red line. Thank you.

Hello olelytken,

Thank you very much! I will try your method today.

I have some experience on programming in Igor. I was trying to find if the Igor have build in function can achieve this, now I think maybe I should make it myself. Thanks.

Here is something that might help.

function DisplaySumImage(cube)
	wave cube
	
	// create image from cube, e.g. using sumBeams
	MatrixOP/O M_SumImage = sumBeams(cube)
	
	DoWindow/F CubeImage
	if (V_flag == 0)
		NewImage/K=1/N=CubeImage M_SumImage
		SetWindow CubeImage,hook(s)=HookFunc	
	endif
end

Function HookFunc(s)
	STRUCT WMWinHookStruct &s
	
	wave/Z cube
	wave/Z M_SumImage 
	if(!WaveExists(cube) || !WaveExists(M_SumImage))
		return 0
	endif
	
	// where is the mouse?
	variable xx = round(AxisValFromPixel("", "Bottom", s.mouseLoc.h))
	variable yy = round(AxisValFromPixel("", "Left", s.mouseLoc.v))
	variable maxX = DimSize(cube, 0)
	variable maxY = DimSize(cube, 1)
	
	switch(s.eventCode)		
		case 3: 	// handle left mouse click 			
			// prevent error when clicking outside of image
			if (xx >= maxX || yy >= maxY || xx < 0  || yy < 0)
				break
			endif
			
			// extract spectrm	
			MatrixOp/O CrsSpec = beam(cube, xx, yy)	
			DoWindow/F Spectrum
			if (V_flag==0)
				Display/K=1/N=Spectrum CrsSpec	
			endif
			break			
	endswitch
	
	return 1
End

If you execute "DisplaySumImage(cube)", where cube represents your spectral image wave, you'll get a "sum-image" as 2D representation, then clicking into it will show the spectrum at that location. Note that the spectrum is not yet scaled to energy.

Hello ChrLie,

Many thanks to your help! I found I was repeating the question already posted (https://www.wavemetrics.com/node/21126).

Best

Jiang