<!-- manual page source format generated by PolyglotMan v3.2, --> <!-- available at http://polyglotman.sourceforge.net/ --> <html> <head> <title>IM_ZEROX(3) manual page</title> </head> <body bgcolor='white'> <a href='#toc'>Table of Contents</a><p> <h2><a name='sect0' href='#toc0'>Name</a></h2> im_zerox - find the zero crossings of an image <h2><a name='sect1' href='#toc1'>Synopsis</a></h2> <b>#include <vips/vips.h></b> <p> int im_zerox(in, out, flag) <br> IMAGE *in, *out; <br> int flag; <p> <h2><a name='sect2' href='#toc2'>Description</a></h2> im_zerox() detects the positive and negative edges of zero crossings of an image held by the image descriptor in, depending on the flag. <p> If flag is -1 the negative zero crossings are returned. If flag is 1 the positive zero crossings are returned. <p> The output image is byte with zero crossing set to 255 and all other values set to zero. Input can have any number of channels, and be any non-complex type. <p> <h2><a name='sect3' href='#toc3'>Return Value</a></h2> The function returns 0 on success and -1 on error. <h2><a name='sect4' href='#toc4'>See Also</a></h2> <a href='im_conv.3.html'>im_conv(3)</a> . <h2><a name='sect5' href='#toc5'>Copyright</a></h2> N. Dessipris <h2><a name='sect6' href='#toc6'>Author</a></h2> N. Dessipris - 14/05/1991 <p> <hr><p> <a name='toc'><b>Table of Contents</b></a><p> <ul> <li><a name='toc0' href='#sect0'>Name</a></li> <li><a name='toc1' href='#sect1'>Synopsis</a></li> <li><a name='toc2' href='#sect2'>Description</a></li> <li><a name='toc3' href='#sect3'>Return Value</a></li> <li><a name='toc4' href='#sect4'>See Also</a></li> <li><a name='toc5' href='#sect5'>Copyright</a></li> <li><a name='toc6' href='#sect6'>Author</a></li> </ul> </body> </html>
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