This page is under development. Comments are welcome, but please load any comments in the comments section at the middle of the page. Thanks,gold
gold Here is an eTCL script to estimate timing photo image loading under pixane. This script was largely derived from posting of Eric Hassold on The comp.lang.tcl newsgroup The timing statements were pulled from the program below after the timing info was calculated. The impetus for the script was an ask9 question about time of "loading single image ...". My solution to a different application on Unix some grey hairs ago was creating batch thumbnails with Image Magick, before loading the application script. If one can work with thumbnails, a tcl or perl script can use Image Magick to thumbnail every image in a directory or tailor to specific megabyte size. Since now, I'm using etcl and pixane on an Acer Aspire pc notepad, it might be desirable to establish some peg points or timing results with the pixane image library. The timing results with pixane are similar to those reported for Image Magick on a Pentium, Fast image resizing
In planning any software, there is a need to develop testcases.
Testcase 1. Output of timing statements.
quantity | number | units |
---|---|---|
photo size of bird.jpg | 1.6 | m |
loading | 1595970 | microseconds per iteration |
Scaling | (1944 x 2592) => (180 x 240) | pixels |
resizex | 68 | microseconds per iteration |
blanking | 4283 | microseconds per iteration |
rescale | 230934 | microseconds per iteration |
saving | 14458 | microseconds per iteration |
proc time | 1863222 | microseconds per iteration |
Comments Section
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# Pretty print version from autoindent # and ased editor # program of image load under pixane # written on Windowws XP on eTCL # working under TCL version 8.5.6 and eTCL 1.0.1 # gold on TCL WIKI , 25may2011 package require Tk package require pixane console show global targetpix photox proc jackpix {} { global targetpix photox set fin [file join [file dirname [info script]] bird6.jpg] set fout [file rootname $fin]_new[file extension $fin] set p [pixane create] pixane load $p -file $fin set w [pixane width $p] set h [pixane height $p] set maximumwidth 240 set maximumheight 240 set ratiopicture 1 if {$ratiopicture} { set sourcewidth [pixane width $p] set sourceheight [pixane height $p] if {$maximumwidth*$sourceheight<$maximumheight*$sourcewidth} { set virtualwidth $maximumwidth set virtualheight [expr {($sourceheight*$maximumwidth)/$sourcewidth}] } else { set virtualwidth [expr {($sourcewidth*$maximumheight)/$sourceheight}] set virtualheight $maximumheight } } else { set virtualwidth $maximumwidth set virtualheight $maximumheight } set targetpix [pixane create] pixane resize $targetpix $virtualwidth $virtualheight pixane blank $targetpix pixane scale $targetpix $p pixane save $targetpix -file $fout -format jpg set photox [pixane create] } jackpix set tkpicturex [pixcopy $targetpix] pack [button .pixanes -image $tkpicturex -bd 30 -bg tan] -fill both -expand true wm title . "Timing Photo Image Loading under Pixane " tkwait window . exit
puts " loading [time {pixane load $p -file $fin} ]" puts "Scaling ($sourcewidth x $sourceheight) => ($virtualwidth x $virtualheight)" puts " resizex [time {pixane resize $targetpix $virtualwidth $virtualheight } ]" puts " blanking [time {pixane blank $targetpix } ]" puts " rescale [time {pixane scale $targetpix $p } ]" puts " saving [time {pixane save $targetpix -file $fout -format jpg } ]" puts " proc time [time { jackpix } ]"
http://linux.about.com/od/commands/l/blcmdl1_convert.htm $ convert *.png images.jpg $ convert '*.jpg' -resize 120x120 thumbnail%03d.png find *.jpg -maxdepth 0 -print -exec convert "{}" -resize 120x160 "thumbnails/{}" \;