| Re: Speed Improvement [message #74582] |
Tue, 25 January 2011 05:03  |
jeanh
Messages: 79
Registered: November 2009
|
Member |
|
|
Hi,
first, you are not using sCount anywhere... remove this loop
Instead of looping through all pixels, look for the needed ones
pixelsToProcess = where(PixelArr eq E_F_ATTNMAP_HIGH_PIXEL,
countPixToProcess)
sXYcol = array_indices(pixelArr, pixelsToProcess) ;get the 2D coords
for i=0L, countPixToProcess -1 do begin
;process
endfor
Jean
On 25/01/2011 4:24 AM, Rony K Varghese wrote:
> ;Processing a picture
> for sCount = 0, 9 do begin
> for sRow = UpperRow, LowerRow do begin
> for sCol = sLeftCol, sRightCol do begin
> ; Check whether high pixels.
> if E_F_ATTNMAP_HIGH_PIXEL eq PixelArr[sCol, sRow] then
> begin
> sXCol = sCol
> sYRow = sRow
> endif
> ; from the center to the left
> for sIndex = 0, sHalfWid do begin
> if HIGH_PIXEL eq vTemp[sXCol - sIndex, sYRow] then
> begin
> PixelArr[sXCol - sIndex, sYRow] = HIGH_PIXEL
> endif else begin
> break ; break from for sIndex
> endelse
> endfor
> ; from the center to the right
> for sIndex = 0, sHalfWid do begin
> if HIGH_PIXEL eq vTemp[sXCol + sIndex, sYRow] then
> begin
> PixelArr[sXCol + sIndex, sYRow] = HIGH_PIXEL
> endif else begin
> break ; break from for sIndex
> endelse
> endfor
> ; from the center to down
> for sIndex = 0, sHalfHght do begin
> if HIGH_PIXEL eq vTemp[sXCol, sYRow+ sIndex] then
> begin
> PixelArr[sXCol, sYRow+ sIndex] = HIGH_PIXEL
> endif else begin
> break ; break from for sIndex
> endelse
> endfor
> ; from the center to up
> for sIndex = 0, sHalfHght do begin
> if HIGH_PIXEL eq vTemp[sXCol, sYRow - sIndex] then
> begin
> PixelArr[sXCol, sYRow - sIndex] = HIGH_PIXEL
> endif else begin
> break ; break from for sIndex
> endelse
> endfor
> endfor; end for sCol
> endfor; end for sRow
> endfor;end for sCount
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
