libvips/cplusplus/examples/avg.cpp

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/*
* compile with:
*
* g++ -g -Wall avg.cpp `pkg-config vips-cpp --cflags --libs`
*
*/
#define DEBUG
#include <vips/vips8>
using namespace vips;
int
main( int argc, char **argv )
{
if( vips_init( argv[0] ) )
vips_error_exit( NULL );
VImage in = VImage::new_from_file( argv[1],
VImage::option()->set( "access", VIPS_ACCESS_SEQUENTIAL ) );
double avg;
avg = in.avg();
printf( "avg = %g\n", avg );
vips_shutdown();
return( 0 );
}