emd_histogram.c

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/*
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//   Copyright (C) 2006-2008  Beijing,  pengzhen ([e-mail])   //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////
*/

#include "emd_histogram_upper_envelope.c"
#include "emd_histogram_lower_envelope.c"

static inline void get_all_histogram( HistogramContext* hc ) 
{

	UINT *hist_mean   = (UINT*)(hc->m_pMean ) ; 
	UINT *hist_residue = (UINT*)(hc->m_pResidue ) ; 

	UINT *hist_upper = (UINT*)hc->m_pUpper ; 
	UINT *hist_lower = (UINT*)hc->m_pLower ; 
	UINT *hist_data  = (UINT*)hc->m_pHistogram  ; 

	int i = HISTTOGRAM_COUNT ;

	/* upper histogram */
	get_upper_histogram( hc ) ; 

	/* lower histogram */
	get_lower_histogram( hc ) ;

	while( i-- )
	{
		// *hist_mean =  *hist_lower ;
		*hist_mean = ( (*hist_upper) + (*hist_lower) ) /2 ;

		*hist_residue = (*hist_data) - (*hist_mean) ;

		hist_mean ++ ; hist_residue ++; hist_data ++; hist_upper ++ ;  hist_lower ++; 
	}

}

static inline void draw_all_histogram( HistogramContext* hc, 
									   BYTE* data , int stride, int width, int height , int off ) 
{

	/*draw histogram */
	draw_histogram( 0x10, hc->m_pHistogram, data, stride, off,0, width-off*2,height-off*2 ) ; 

	/*draw upper histogram */
	//draw_histogram( 0xf0, hc->m_pUpper, data, stride, off,0, width-off*2,height-off*2 ) ; 

	/*draw lower histogram */
	//draw_histogram( 0x80, hc->m_pLower, data, stride, off,0, width-off*2,height-off*2 ) ; 

    /*draw mean histogram */
	draw_histogram( 0xf0, hc->m_pMean, data, stride, off,0, width-off*2,height-off*2 ) ; 

	/*draw residue histogram */
	draw_histogram( 0x80, hc->m_pResidue, data, stride, off,0, width-off*2,height-off*2 ) ; 

}

int dvp_emd_analysis_histogram( dvp_ctx *dvpctx, void* data, int width, int height, int stride )
{

	HistogramContext* hc = &(m_pHistogramContext) ;

    /* histogram */
	get_histogram(  hc, data, width, height, stride ) ;
	
	// get energy 
	energy_histogram( hc->m_pHistogram ) ; 

#define Hist_H_Off height/8 

	/* norm histogram */
	norm_histogram( hc->m_pHistogram, height-Hist_H_Off*2) ; 

	/* get histogram */
	get_all_histogram(  hc )  ;

	/*draw histogram */
	draw_all_histogram( hc, (BYTE*)data, stride, width, height , Hist_H_Off ) ;

#undef Hist_H_Off

   return 1 ;

}