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Moment and XROI [message #93345]

Mon, 20 June 2016 11:04

roconnor
Messages: 2
Registered: June 2016

Junior Member

Hi everyone,

I'm stumped on this one. My aim is to "cut out" a region of an image (fits) and analyze only the data in that region. That works great when I use XROI and the statistics keyword. However, I would also like to use MOMENT to further analyze the data contained within the ROI. When I use MOMENT, however, the mean returned is very different than the mean returned by Statistics. Does anyone know why this is/how I could get MOMENT to analyze the data within the ROI?

Relevant snippet of code is below.

XROI, data, regions_out = thisROI, statistics=S, /block

mask = thisROI ->computemask(dimensions=size(data, /dimensions), mask_rule=2)

roiImage = data*(mask GT 0)
M = moment(roiImage)
tv, roiImage

PRINT, 'Count Min Max Mean StdDev'
PRINT, S
print, '*********************************************************** ****'
PRINT, 'Mean: ', M[0] & PRINT, 'Variance: ', M[1] & $
PRINT, 'Skewness: ', M[2] & PRINT, 'Kurtosis: ', M[3]

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[Message index]

		Moment and XROI By: roconnor on Mon, 20 June 2016 11:04
		Re: Moment and XROI By: wlandsman on Mon, 20 June 2016 12:27
		Re: Moment and XROI By: roconnor on Mon, 20 June 2016 12:47

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