03-12-2007
Quote:
Originally Posted by Perderabo
Are the two files guaranteed to have the same number of lines? So if a bob line is in one file it is also in the other? Are the records in the same sequence in both files?
Yes, they have same number of lines and also on same sequece.
I dont have a python so I cant use the code given by ghostdog74.
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LEARN ABOUT DEBIAN
imager::largesamples
Imager::LargeSamples(3pm) User Contributed Perl Documentation Imager::LargeSamples(3pm)
NAME
Imager::LargeSamples - track/document large sample support
SYNOPSIS
# make a large sample image
my $im = Imager->new(..., bits => 16);
# call some method
my $result = $im->$method(...);
# was the image modified at its full sample size
DESCRIPTION
Imager has had in-memory support for large samples for years now, but many methods still don't work at the higher sample size when supplied
with a large sample image.
This document will track which methods support large samples and which don't, for future improvements.
Support by method
Method Support Notes
------ ------- -----
arc Partial [1]
box Partial [2]
circle Partial [1]
convert Full
copy Full
crop Full
difference Full
filter Partial Depends on the filter.
flip Full
flood_fill Partial [1]
getpixel Full
getsamples Full
getscanline Full
map None
masked Full
matrix_transform
Full
paste Full
polygon Partial [1]
polyline None
read Partial See L<File format large sample support>
read_multi Partial See L<File format large sample support>
rotate Full
rubthrough Full
scale Partial Some qtypes support large samples
scaleX None
scaleY None
setpixel Full
setscanline Full
string Full Preserves large samples, but most font drivers
generate 8 or fewer bits of levels of coverage.
transform None
transform2 None
write Partial See L<File format large sample support>
write_multi Partial See L<File format large sample support>
[1] filling an area using the fill parameter works at the full depth of the image, using filled => 1 and color works at 8-bits/sample
[2] box() will fill the area at the supplied color, but outline at 8-bits/sample.
File format large sample support
Format Format samples Imager support
------ -------------- --------------
BMP 8 8
GIF 8 8
ICO 8 8
JPEG 8, 12 8
PBM 1 1
PGM/PPM 1-16 read any, writes 8, 16
PNG 1, 2, 4, 8, 16 8
RAW 8
SGI 8, 16 8, 16
TGA 8 8
TIFF (many) read/write 8, 16, 32 contig rgb/grey images
read/write bi-level
read/write 4/8 paletted images
Filter larger sample support
Filter Large sample support
------ --------------------
autolevels No
bumpmap No
bumpmap_complex No
contrast No
conv Yes
fountain Yes
gaussian Yes
gradgen No
hardinvert Yes
mosaic No
postlevels No
radnoise No
turbnoise No
unsharpmask Yes
watermark No
AUTHOR
Tony Cook <tonyc@cpan.org>
perl v5.14.2 2011-06-06 Imager::LargeSamples(3pm)