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GD script for web/server creation of images

Douglas Rhiner

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  • »Douglas Rhiner« ist der Autor dieses Themas

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Wohnort: San Anselmo, CA

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Freitag, 4. März 2011, 04:48

GD script for web/server creation of images

What would be really cool is if we had the ability to have a web-based set of krpano Tools / scripts.

Upload an image, leverage the scripting, and out comes the 6 faces and preview.

Zephyr

Profi

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Wohnort: Netherlands

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Freitag, 4. März 2011, 13:37

you could use php exec function? http://php.net/manual/en/function.exec.php
that droplets of krpano support command line

ahoeben

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Freitag, 8. April 2011, 11:33

I experimented with using imagemagick to convert from spherical to cubic, but found that the performance was severely lacking in comparison to the krpano tools. Here's an example, extracting the top face from an equirectangular:

Quellcode

 
1

convert equirectangular.jpg ( +clone -set option:distort:viewport %%[fx:w/PI]x%%[fx:w/PI]+%%[fx:(w-w/PI)/2]+%%[fx:(h-w/PI)/2] -distort SRT 0 ) +swap -interpolate bicubic -fx "xx=i/w-.5;yy=j/h-.5;ofs=(xx<0)?.5:1.5;pan=(yy==0)?ofs*pi:atan((xx)/(yy))+2*pi;pan=mod((yy>0)?pan+pi:pan,2*pi);tlt=(xx==0&&yy==0)?0:mod(-atan(.5/hypot(xx,yy))+pi/2,pi);v.p{ pan*v.h/pi, tlt*v.h/pi}" out.png

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