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correct PSNR metric

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This commit is contained in:
Cristy
2025-05-24 12:18:24 -04:00
parent d772e3b0f3
commit f591498657
1 changed files with 7 additions and 7 deletions
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MagickCore/compare.c
+7 -7
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@@ -1249,6 +1249,9 @@ static MagickBooleanType GetNormalizedCrossCorrelationDistortion(
beta_variance[k]*=area;
distortion[k]*=PerceptibleReciprocal(sqrt(alpha_variance[k]*
beta_variance[k]));
distortion[k]=1.0-distortion[k];
if (fabs(distortion[k]) < MagickEpsilon)
distortion[k]=0.0;
distortion[CompositePixelChannel]+=distortion[k];
}
distortion[CompositePixelChannel]/=(double) GetImageChannels(image);
@@ -3291,8 +3294,6 @@ static Image *SIMVarianceImage(Image *alpha_image,const Image *beta_image,
static Image *DPCSimilarityImage(const Image *image,const Image *reconstruct,
RectangleInfo *offset,double *similarity_metric,ExceptionInfo *exception)
{
#define CompareImageExtent(columns,rows) \
((((rows) > (columns) ? (rows) : (columns))+7) & ~7)
#define ThrowDPCSimilarityException() \
{ \
if (dot_product_image != (Image *) NULL) \
@@ -3347,7 +3348,7 @@ static Image *DPCSimilarityImage(const Image *image,const Image *reconstruct,
geometry;
size_t
extent = CompareImageExtent(image->columns,image->rows);
extent = MagickMax(image->columns,image->rows);
/*
Dot product correlation-based image similarity using FFT local statistics.
@@ -3554,7 +3555,7 @@ static Image *MSESimilarityImage(const Image *image,const Image *reconstruct,
geometry;
size_t
extent = CompareImageExtent(image->columns,image->rows);
extent = MagickMax(image->columns,image->rows);
/*
MSE correlation-based image similarity using FFT local statistics.
@@ -3572,8 +3573,6 @@ static Image *MSESimilarityImage(const Image *image,const Image *reconstruct,
ThrowMSESimilarityException();
GetPixelInfoRGBA(0,0,0,0,&reconstruct_image->background_color);
(void) ResetImagePage(reconstruct_image,"0x0+0+0");
if ((extent % 2) != 0)
extent++;
status=SetImageExtent(reconstruct_image,extent,extent,exception);
if (status == MagickFalse)
ThrowMSESimilarityException();
@@ -3610,6 +3609,7 @@ static Image *MSESimilarityImage(const Image *image,const Image *reconstruct,
channel_statistics=GetImageStatistics(sum_image,exception);
if (channel_statistics == (ChannelStatistics *) NULL)
ThrowMSESimilarityException();
GetPixelInfoRGBA(0,0,0,0,&sum_image->background_color);
status=SetImageExtent(sum_image,extent,extent,exception);
if (status == MagickFalse)
ThrowMSESimilarityException();
@@ -3862,7 +3862,7 @@ static Image *PhaseSimilarityImage(const Image *image,const Image *reconstruct,
geometry;
size_t
extent = CompareImageExtent(image->columns,image->rows);
extent = MagickMax(image->columns,image->rows);
/*
Phase correlation-based image similarity using FFT local statistics.