LibTiff Mailing List

Thank you Richard.
Yes, i want to combine several images of different size onto a bigger 
one, so pointing me to tiffcrop was
a good idea. After getting a bit deeper into libtiff i guess it would be 
ok to read (or create) the background image
(i call it "the pasteboard") into memory, so it does not matter if the 
TIFF organization was tiled or striped.
Then read one image after the other an paste the lines at the location 
given.
Therefore i need to access the image raster pixel in memory, calc the 
offset and overwrite the background image data with the read data from 
each image. The order i read the images is equal to their layer in the 
pasteboard.
After that i can write out the pasteboard image as a new file.

Now, is it ok (in question of speed) to use TIFFReadScanline or should i 
use some lower level functions?

Oliver


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive May 2010 Previous Thread Next Thread Previous by Thread Next by Thread Previous by Date Next by Date Contact The TIFF Mailing List Homepage This list is run by Frank Warmerdam Archive maintained by AWare Systems	Thread 2010.05.08 18:39 "Merge several TIFFG4 images", by Oliver Geisen 2010.05.10 04:04 "Merging multiple Group4 compressed TIFF files", by Richard Nolde 2010.05.11 07:00 "Merging multiple Group4 compressed TIFF files", by Oliver Geisen 2010.05.11 15:22 "Re: Merging multiple Group4 compressed TIFF files", by Bob Friesenhahn 2010.05.11 16:59 "Combining multiple G4 images into a single output image", by Richard Nolde 2010.05.11 17:33 "Re: Combining multiple G4 images into a single output image", by Oliver Geisen 2010.05.11 19:15 "Re: Combining multiple G4 images into a single output image", by Olivier Paquet 2010.05.12 16:47 "Re: Combining multiple G4 images into a single output image", by Bob Friesenhahn 2010.05.11 07:00 "Merging multiple Group4 compressed TIFF files", by Oliver Geisen Thank you Richard. Yes, i want to combine several images of different size onto a bigger one, so pointing me to tiffcrop was a good idea. After getting a bit deeper into libtiff i guess it would be ok to read (or create) the background image (i call it "the pasteboard") into memory, so it does not matter if the TIFF organization was tiled or striped. Then read one image after the other an paste the lines at the location given. Therefore i need to access the image raster pixel in memory, calc the offset and overwrite the background image data with the read data from each image. The order i read the images is equal to their layer in the pasteboard. After that i can write out the pasteboard image as a new file. Now, is it ok (in question of speed) to use TIFFReadScanline or should i use some lower level functions? Oliver

LibTiff Mailing List

Thread

2010.05.11 07:00 "Merging multiple Group4 compressed TIFF files", by Oliver Geisen