LibTiff Mailing List

I'm about to upload new new update to Tiffcrop which fixes some bugs 
discovered in the previous release and I am looking for testers.  Please 
send me an email if you are willing to test my code which is based on 
the current 3.9 CVS release downloaded a couple of weeks ago.

In the previous version, some combinations of command line options did 
not work correctly, in particular the use of margins with fixed size 
regions and/or rotations. It should now be possible to do all of the 
above at the same time.  eg -E left -U in -m0.5,0.25,0,0 -X 7.5 -Y 4.0 
-R 90 to extract a region 7.5 inches wide by 4.0 inches beginning 1/2 
inch from the top edge and 1/4 inch from the left edge and then rotate 
it by 90 degrees.

The one known item remaining to be done is to allow the proper combining 
of multiple horizontal zones side by side instead of one above the 
other. eg -Z 1:4,4:4 now appends the second zone below the first one 
instead of to its right.

I am also entertaining feature requests for the next version.  The 
following possibilities are under consideration so let me know what is 
off interest to the user community. These functions would not 
necessarily work on all color space and bit depths as I don't have any 
knowledge of YCbCr or similar color models.

1)  Add an "Edge reference" value of Center to allow fixed sized regions 
to be specified relative to the center of the image.
2)  Specifying one or more regions for extraction using x1,y1,x2,y2  
coordinates, possibly to individual pages instead of to a single output 
page.
3)  Rotation by an arbitrary angle instead of just multiples of 90%.
4)  Image resizing by resampling/interpolation
5)  Image filters for cleaning up scanned images (aimed mainly at 
bilevel text processing images), eg smoothing, sharpening, 
despeckle/noise reduction, etc.
6)  Automatic deskewing

Others?

If anyone can recommend good references for algorithms for bicubic 
interpolation, deskewing, and filtering, please send them to me.

Richard Nolde
Tiffcrop author


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive April 2008 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	2008.04.11 19:29 "Testers wanted for new release of Tiffcrop", by Richard Nolde I'm about to upload new new update to Tiffcrop which fixes some bugs discovered in the previous release and I am looking for testers. Please send me an email if you are willing to test my code which is based on the current 3.9 CVS release downloaded a couple of weeks ago. In the previous version, some combinations of command line options did not work correctly, in particular the use of margins with fixed size regions and/or rotations. It should now be possible to do all of the above at the same time. eg -E left -U in -m0.5,0.25,0,0 -X 7.5 -Y 4.0 -R 90 to extract a region 7.5 inches wide by 4.0 inches beginning 1/2 inch from the top edge and 1/4 inch from the left edge and then rotate it by 90 degrees. The one known item remaining to be done is to allow the proper combining of multiple horizontal zones side by side instead of one above the other. eg -Z 1:4,4:4 now appends the second zone below the first one instead of to its right. I am also entertaining feature requests for the next version. The following possibilities are under consideration so let me know what is off interest to the user community. These functions would not necessarily work on all color space and bit depths as I don't have any knowledge of YCbCr or similar color models. 1) Add an "Edge reference" value of Center to allow fixed sized regions to be specified relative to the center of the image. 2) Specifying one or more regions for extraction using x1,y1,x2,y2 coordinates, possibly to individual pages instead of to a single output page. 3) Rotation by an arbitrary angle instead of just multiples of 90%. 4) Image resizing by resampling/interpolation 5) Image filters for cleaning up scanned images (aimed mainly at bilevel text processing images), eg smoothing, sharpening, despeckle/noise reduction, etc. 6) Automatic deskewing Others? If anyone can recommend good references for algorithms for bicubic interpolation, deskewing, and filtering, please send them to me. Richard Nolde Tiffcrop author

LibTiff Mailing List

2008.04.11 19:29 "Testers wanted for new release of Tiffcrop", by Richard Nolde