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Re: Low pass filter - Problem with kernel [message #50534 is a reply to message #50402]

Wed, 04 October 2006 02:44

Vidhya
Messages: 6
Registered: October 2006

Junior Member

Dear All,
Sorry for not giving a detailed description of the program. The
following is the program, which tries to apply a low pass filter to an
image of size, 766*374 with 62 bands.

PRO vnoise
filename='image.hdf'
hdfid=hdf_sd_start(filename, /READ)

varid=hdf_sd_select(hdfid, 0)
hdf_sd_getdata, varid, image

varid=hdf_sd_select(hdfid, 1)
hdf_sd_getdata, varid, mask

hdf_sd_end_access, varid

hdf_sd_end, hdfid

column_average=rebin(image, 1, 374, 62)

;applying the log to the average radiance of the image
column_log = alog10(column_average)

ksize = [3,3]

kernel = replicate((1.0/(ksize[0]*ksize[1])), ksize[0], ksize[1])

filtered_image = convol(float(column_log), kernel, /CENTER,
/EDGE_TRUNCATE)

;filtered_image = convol(float(column_log), kernel, /CENTER,
/EDGE_TRUNCATE)
;% CONVOL: Incompatible dimensions for Array and Kernel.
;% Execution halted at: $MAIN$

And this is where I get the error message about the dimensions.

What I am trying to do is to rebin the image column-wise, apply a log
to the average, and then apply the kernel to the image.

Let me know where I go wrong!

Thank you
Vidhya

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[Message index]

		Re: Low pass filter - Problem with kernel By: James Kuyper on Tue, 03 October 2006 07:41
		Re: Low pass filter - Problem with kernel By: David Fanning on Tue, 03 October 2006 05:52
		Re: Low pass filter - Problem with kernel By: Vidhya on Wed, 04 October 2006 02:44

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