ImageEn, unit imageenproc |
|
TImageEnProc.CompareHistogramWith
Declaration
function CompareHistogramWith(SecondImage: TIEBitmap; Mode: TIECmpMode; GrayScale: Boolean): Double;
Description
Compare histograms of the current image with another image and return a floating point value.
For iecmpRMSE the result will be in the range 0 to 1 indicating the percentage of equality. Otherwise it will be a distance or covariance value.
Note: If the image
PixelFormat is not ie24RGB, it will be converted
Parameter | Description |
SecondImage | Another image to compare with |
Mode | The algorithm used for comparison |
GrayScale | If True, only a gray scale histogram is compared |
| Demos\ImageAnalysis\ImagesDiff\ImagesDiff.dpr |
| Demos\ImageEditing\EveryMethod\EveryMethod.dpr |
rmse := ImageEnView1.Proc.CompareHistogramWith( ImageEnView2.IEBitmap, iecmpRMSE, chkChwGray.Checked );
hamm := ImageEnView1.Proc.CompareHistogramWith( ImageEnView2.IEBitmap, iecmpHamming, chkChwGray.Checked );
cova := ImageEnView1.Proc.CompareHistogramWith( ImageEnView2.IEBitmap, iecmpCovariance, chkChwGray.Checked );
lblRmse2.Caption := IEFloatToFormatString( rmse, 2, True );
lblHamming.Caption := IEFloatToFormatString( hamm, 2, True );
lblCovariance.Caption := IEFloatToFormatString( cova, 2, True );
Example Images
Result: GrayScale = FalseRoot mean squared error: 0.93
Hamming distance: 0.02
Covariance: -31,047.26
Result: GrayScale = TrueRoot mean squared error: 0.92
Hamming distance: 0.019
Covariance: -21,072.6
See Also
◼CompareWith◼ComputeImageEquality