Not work MagickCompareImages, need help

[deomonstore2]

In console:

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C:\Program Files\ImageMagick-6.3.6-Q8>compare.exe -metric PSNR C:\1.bmp C:\2.bmp C:\Result.bmp
9.86553

In my application:

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D:\Test>Test.exe
Status = 1
Status = 1
Distortion =  0.00000000000000E+0000
Distortion =  6.70699291666667E+0003

Source code:

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program Test;

{$APPTYPE CONSOLE}

uses
SysUtils,
ImageMagick in 'PascalMagick\magick\ImageMagick.pas',
magick_wand in 'PascalMagick\wand\magick_wand.pas';

var
Img1, Img2, ImgResult: PMagickWand;
Status: MagickBooleanType;
Distortion: Double;

begin
MagickWandGenesis;

Img2 := NewMagickWand;
Img1 := NewMagickWand;

Status := MagickReadImage(Img1, PChar('C:\1.bmp'));
Writeln('Status = ', Status);

Status := MagickReadImage(Img2, PChar('C:\2.bmp'));
Writeln('Status = ', Status);

Writeln('Distortion = ', Distortion);
ImgResult := MagickCompareImages(Img1, Img2, PeakSignalToNoiseRatioMetric, @Distortion);
Writeln('Distortion = ', Distortion);

Img1 := DestroyMagickWand(Img1);
Img2 := DestroyMagickWand(Img2);
DestroyMagickWand(ImgResult);

MagickWandTerminus;
end.

Why 6.70699291666667E+0003 (but not 9.86553)? I don't understand, where is my trouble?

[el_supremo]

FYI: I tried this sort of thing in C using the rose: image.
First, I did this from the command line:

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convert rose: rose.jpg
convert rose.jpg -sharpen 0x1 reconstruct.jpg
compare -metric PSNR rose.jpg reconstruct.jpg difference.png

Which printed the result 27.0375

I then wrote and compiled a C program to compare rose.jpg and reconstruct.jpg using MagickWand's MagickCompareImages function and it prints exactly the same result.

Pete

[deomonstore2]

el_supremo
can i see source code of your C programm?

[el_supremo]

Code: Select all

#include <windows.h>
#include <wand/magick_wand.h>

void test_wand(void)
{
	MagickWand *img1 = NULL,*img2 = NULL,*m_wand = NULL;
	double distortion = 0.0;
	char info[128];

	MagickWandGenesis();
	img1 = NewMagickWand();
	img2 = NewMagickWand();
	MagickReadImage(img1, "rose.jpg");
	MagickReadImage(img2,"reconstruct.jpg");
	m_wand = MagickCompareImages(img1,img2,PeakSignalToNoiseRatioMetric,&distortion);

	sprintf(info,"%12.4f",distortion);
	MessageBox(NULL,info,"",MB_OK);

	/* Tidy up */
	m_wand = DestroyMagickWand(m_wand);
	img1 = DestroyMagickWand(img1);
	img2 = DestroyMagickWand(img2);
	MagickWandTerminus();
}

Pete