/*
Functions?and?structures?for?dealing?with?image?features

Copyright?（C）?2006-2010??Rob?Hess?

@version?1.1.2-20100521
*/

#include?“utils.h“
#include?“imgfeatures.h“

#include?

#include?

static?int?import_oxfd_features（?char*?struct?feature**?）;
static?int?export_oxfd_features（?char*?struct?feature*?int?）;
static?void?draw_oxfd_features（?IplImage*?struct?feature*?int?）;
static?void?draw_oxfd_feature（?IplImage*?struct?feature*?CvScalar?）;

static?int?import_lowe_features（?char*?struct?feature**?）;
static?int?export_lowe_features（?char*?struct?feature*?int?）;
static?void?draw_lowe_features（?IplImage*?struct?feature*?int?）;
static?void?draw_lowe_feature（?IplImage*?struct?feature*?CvScalar?）;


/*
Reads?image?features?from?file.??The?file?should?be?formatted?as?from
the?code?provided?by?the?Visual?Geometry?Group?at?Oxford:


@param?filename?location?of?a?file?containing?image?features
@param?type?determines?how?features?are?input.??If?\a?type?is?FEATURE_OXFD
	the?input?file?is?treated?as?if?it?is?from?the?code?provided?by?the?VGG
	at?Oxford:

	http://www.robots.ox.ac.uk:5000/~vgg/research/affine/index.html

	If?\a?type?is?FEATURE_LOWE?the?input?file?is?treated?as?if?it?is?from
	David?Lowe‘s?SIFT?code:

	http://www.cs.ubc.ca/~lowe/keypoints??
@param?features?pointer?to?an?array?in?which?to?store?features

@return?Returns?the?number?of?features?imported?from?filename?or?-1?on?error
*/
int?import_features（?char*?filename?int?type?struct?feature**?feat?）
{
	int?n;

	switch（?type?）
	{
	case?FEATURE_OXFD:
		n?=?import_oxfd_features（?filename?feat?）;
		break;
	case?FEATURE_LOWE:
		n?=?import_lowe_features（?filename?feat?）;
		break;
	default:
		fprintf（?stderr?“Warning:?import_features（）:?unrecognized?feature“?\
				“type?%s?line?%d\n“?__FILE__?__LINE__?）;
		return?-1;
	}

	if（?n?==?-1?）
		fprintf（?stderr?“Warning:?unable?to?import?features?from?%s“	\
			“?%s?line?%d\n“?filename?__FILE__?__LINE__?）;
	return?n;
}



/*
Exports?a?feature?set?to?a?file?formatted?depending?on?the?type?of
features?as?specified?in?the?feature?struct‘s?type?field.

@param?filename?name?of?file?to?which?to?export?features
@param?feat?feature?array
@param?n?number?of?features?

@return?Returns?0?on?success?or?1?on?error
*/
int?export_features（?char*?filename?struct?feature*?feat?int?n?）
{
	int?r?type;

	if（?n?<=?0??||??!?feat?）
	{
		fprintf（?stderr?“Warning:?no?features?to?export?%s?line?%d\n“
				__FILE__?__LINE__?）;
		return?1;
	}
	type?=?feat[0].type;
	switch（?type?）
	{
	case?FEATURE_OXFD:
		r?=?export_oxfd_features（?filename?feat?n?）;
		break;
	case?FEATURE_LOWE:
		r?=?export_lowe_features（?filename?feat?n?）;
		break;
	default:
		fprintf（?stderr?“Warning:?export_features（）:?unrecognized?feature“?\
				“type?%s?line?%d\n“?__FILE__?__LINE__?）;
		return?-1;
	}

	if（?r?）
		fprintf（

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-03-19?22:17??SIFT_RANSAC_RobHess\
?????目錄???????????0??2017-03-19?21:07??SIFT_RANSAC_RobHess\Debug\
?????文件??????110080??2017-03-19?21:09??SIFT_RANSAC_RobHess\Debug\SIFT_RANSAC_RobHess.exe
?????文件??????653724??2017-03-19?21:09??SIFT_RANSAC_RobHess\Debug\SIFT_RANSAC_RobHess.ilk
?????文件?????1739776??2017-03-19?21:09??SIFT_RANSAC_RobHess\Debug\SIFT_RANSAC_RobHess.pdb
?????目錄???????????0??2017-03-19?15:55??SIFT_RANSAC_RobHess\ipch\
?????目錄???????????0??2017-03-19?19:12??SIFT_RANSAC_RobHess\ipch\sift_ransac_robhess-85cf73db\
?????文件?????2752512??2017-03-19?19:12??SIFT_RANSAC_RobHess\ipch\sift_ransac_robhess-85cf73db\sift_ransac_robhess-e547a7ee.ipch
?????目錄???????????0??2017-03-19?21:08??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\
?????文件????16797696??2017-03-19?22:17??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess.sdf
?????文件?????????924??2017-03-19?15:55??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess.sln
?????文件???????34304??2017-03-19?22:17??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess.suo
?????文件???????48824??2010-05-21?12:48??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\beaver.png
?????文件???????39513??2010-05-21?12:48??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\beaver_xform.png
?????目錄???????????0??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\
?????文件???????16094??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\cl.command.1.tlog
?????文件??????106662??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\CL.read.1.tlog
?????文件???????20516??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\CL.write.1.tlog
?????文件???????45462??2017-03-19?20:22??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\imgfeatures.obj
?????文件???????30662??2017-03-19?20:22??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\kdtree.obj
?????文件???????????2??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link-cvtres.read.1.tlog
?????文件???????????2??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link-cvtres.write.1.tlog
?????文件???????????2??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.192240-cvtres.read.1.tlog
?????文件???????????2??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.192240-cvtres.write.1.tlog
?????文件???????????2??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.192240.read.1.tlog
?????文件???????????2??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.192240.write.1.tlog
?????文件????????5748??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.command.1.tlog
?????文件???????12102??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.read.1.tlog
?????文件????????3200??2017-03-19?21:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\link.write.1.tlog
?????文件???????17959??2017-03-19?17:09??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\match.obj
?????文件???????16190??2017-03-19?20:22??SIFT_RANSAC_RobHess\SIFT_RANSAC_RobHess\Debug\minpq.obj
............此處省略44個文件信息