Description

Stores all the parameters of a particular image effect or editing operation, e.g. rotating 90 deg. or increasing contast by 20%

This class provides read/write access to the parameters of the Image Processing Dialog (displayed by calling DoPreviews).
It can also be used to build a chain of a effects to apply to an image.

General Fields

Effect Fields

Auto Enhancement (peAutoEnhance)
Uses one of: AutoImageEnhance1, AutoImageEnhance3, AdjustGainOffset, WallisFilter, WhiteBalance_AutoWhite

Bump Map (peBumpMap)
Uses BumpMapping

Color Curve (peColorCurve)
Uses ApplyCurve

Contrast and Brightness (peContrast)
Uses Contrast, or IntensityRGBAll for brightness

Cropping (peCrop)
Uses Crop, or ImageResize if Crop values are negative

Equalization (peEqualize)
Uses Threshold, HistEqualize and HistAutoEqualize (if Equalization_AutoEqualize is true)

Fourier Transformation (peFFT)
Uses FTConvertFrom

Gamma Correction (peGamma)
Uses GammaCorrect

HSL (peHSL)
Uses HSLvar

HSV (peHSV)
Uses HSVvar

Lens Effect (peLens)
Uses Lens

Level Adjustment (peLevels)
Uses AdjustLevels

Morph Filter (peMorph)
Uses Minimum, Maximum, Opening and Closing

Pixelization (pePixelize)
Uses Pixelize

Resampling/Scaling (peResize)
Uses Resample. Resize_ByPercent determines whether Resize_* values specify a percentage, such as 50, or a fixed pixel size, such as 1000.

RGB (peRGB)
Uses IntensityRGBAll

Rotate and Flip (peRotate)
Uses Rotate, RotateAndCrop or Flip

Sharpen (peSharpen)
Uses Sharpen, or AutoSharp if Sharpen_AutoSharp = true

Soft Shadow (peSoftShadow)
Uses AddSoftShadow, or AddInnerShadow if Shadow_Position = iespInner

Smooth (peSmoothing)
Uses one of: SymmetricNearestNeighbour, Blur, UnsharpMask, fastNlMeansDenoisingColored, smooth

User Filter (peUserFilt)
Uses ApplyFilter

Transparency (peTransparency)
Uses one of: CastAlpha, SetTransparentColors, RemoveChromaKey

Other Color Methods (peOtherColor)
Uses one of: ConvertToGray, ConvertToSepia, Colorize, Negative, WhiteBalance_GrayWorld

Other Effects (peOtherEffects)
Uses one of: Wave, Reflection, PencilSketch, Swirl, Cartoonify

Other

Demos

Examples

Auto-Enhance - AutoImageEnhance1 Example
// Improve the contrast and colors in the image
// Same as: ImageEnView1.Proc.AutoImageEnhance1( 64, 20, 25, 2 );
Effect.Add( peAutoEnhance );
Effect.CurrentItem.AutoEnhance_Method   := AutoEnhanceMethod_AutoImageEnhance1;
Effect.CurrentItem.AutoEnhance1_Slope   := 20;
Effect.CurrentItem.AutoEnhance1_Range   := 25;
Effect.CurrentItem.AutoEnhance1_Quality := 5;  // Which affects SubsampledSize and Neighbour
Effect.Apply();

See also: AutoImageEnhance1

Auto-Enhance - AutoImageEnhance3 Example

// Enhance luminosity by applying a local adaptation tone mapping algorithm
// Same as: ImageEnView1.Proc.AutoImageEnhance3( 0.35, 80 );
Effect.Add( peAutoEnhance );
Effect.CurrentItem.AutoEnhance_Method      := AutoEnhanceMethod_AutoImageEnhance3;
Effect.CurrentItem.AutoEnhance3_Gamma      := 0.35;
Effect.CurrentItem.AutoEnhance3_Saturation := 80;
Effect.Apply();

See also: AutoImageEnhance3

Auto-Enhance - WallisFilter Example

// Apply a Wallis Filter to the image
// Same as: ImageEnView1.Proc.WallisFilter();
Effect.Add( peAutoEnhance );
Effect.CurrentItem.AutoEnhance_Method := AutoEnhanceMethod_WallisFilter;
// Only default parameters used for: AutoEnhanceMethod_WallisFilter, AutoEnhanceMethod_AdjustGainOffset, AutoEnhanceMethod_WhiteBalance_AutoWhite
Effect.Apply();

See also: WallisFilter, AdjustGainOffset, WhiteBalance_AutoWhite

Bump Map Example

// Apply a bump mapping effect to the image
// Same as: ImageEnView1.Proc.BumpMapping( 800, 600, 40, 30, 10, CreateRGB(255, 255, 255) );
Effect.Add( peBumpMap );
Effect.CurrentItem.BumpMap_Left   := 800;
Effect.CurrentItem.BumpMap_Top    := 400;
Effect.CurrentItem.BumpMap_Width  := 40;
Effect.CurrentItem.BumpMap_Height := 30;
Effect.CurrentItem.BumpMap_Col    := CreateRGB( 255, 255, 255 );
Effect.CurrentItem.BumpMap_Src    := 10;
Effect.CurrentItem.BumpMap_Auto   := False;
Effect.Apply();

See also: BumpMapping

Brightness Example

// Apply a darken filter
// Same as: ImageEnView1.Proc.IntensityRGBAll( -10, -10, -10 );
Effect.Add( peContrast );
Effect.CurrentItem.Contrast_Brightness := -10;
Effect.Apply();

See also: IntensityRGBAll

Contrast Example

// Increase the contrast
// Same as: ImageEnView1.Proc.Contrast( 50 );
Effect.Add( peContrast );
Effect.CurrentItem.Contrast_Contrast := 50;
Effect.Apply();

See also: Contrast

Color Curve Example

// Apply a color curve to the image
Effect.Add( peColorCurve );
Effect.CurrentItem.ColorCurve_CurvePoints := '0,0,112,73,255,255|0,0,255,255|0,0,255,255|0,0,255,255';
Effect.CurrentItem.ColorCurve_Channel     := ieccRGB
Effect.Apply();

See also: ApplyCurve

Cropping Example

// Crop 25% of all sides of the image
// Same as: ImageEnView1.Proc.Crop( bmp.Width div 4, bmp.Height div 4, MulDiv( bmp.Width, 3, 4 ), MulDiv( bmp, 3, 4 ));
Effect.Add( peCrop );
Effect.CurrentItem.Crop_Left   := bmp.Width div 4;
Effect.CurrentItem.Crop_Top    := bmp.Height div 4;
Effect.CurrentItem.Crop_Right  := bmp.Width div 4;
Effect.CurrentItem.Crop_Bottom := bmp.Height div 4;
Effect.Apply();

See also: Crop

Border Example

// Add a black border to the image
// Same as: ImageEnView1.Proc.ImageResize( 10, 10, 10, 10, 255, clBlack );
Effect.Add( peCrop );
Effect.CurrentItem.Crop_Left   := -10;
Effect.CurrentItem.Crop_Top    := -10;
Effect.CurrentItem.Crop_Right  := -10;
Effect.CurrentItem.Crop_Bottom := -10;
Effect.CurrentItem.Crop_BackgroundColor := clBlack;
Effect.Apply();

See also: ImageResize

Equalization Example

// Compress the color histogram
// Same as: ImageEnView1.Proc.HistEqualize( CreateRGB(50, 50, 50), CreateRGB(150, 150, 150) );
Effect.Add( peEqualize );
Effect.CurrentItem.Equalization_EqDown := CreateRGB( 50, 50, 50 );
Effect.CurrentItem.Equalization_EqUp := CreateRGB( 150, 150, 150 );
Effect.CurrentItem.Equalization_AutoEqualize := True;
Effect.Apply();

See also: HistEqualize

Equalization - AutoEqualize Example

// Equalizes the color histogram of the selected region
// Same as: ImageEnView1.Proc.HistAutoEqualize();
Effect.Add( peEqualize );
Effect.CurrentItem.Equalization_AutoEqualize := True;
Effect.Apply();

See also: HistAutoEqualize

Equalization - Threshold Example

// Change all values less than R/G/B of 64 to black
// Same as: ImageEnView1.Proc.Threshold( CreateRGB(64, 64, 64), CreateRGB(255, 255, 255), CreateRGB(0, 0, 0), CreateRGB(255, 255, 255) );
Effect.Add( peEqualize );
Effect.CurrentItem.Equalization_ThresholdDown := CreateRGB( 64, 64, 64 );
Effect.CurrentItem.Equalization_ThresholdUp := CreateRGB( 255, 255, 255 );
Effect.CurrentItem.Equalization_Gray  := True;
Effect.CurrentItem.Equalization_Blue  := False;
Effect.CurrentItem.Equalization_Green := False;
Effect.CurrentItem.Equalization_Red   := False;
Effect.Apply();

See also: Threshold

Gamma Correction Example

// Apply gamma correction over all channels (RGB)
// Same as: ImageEnView1.Proc.GammaCorrect( 2, [iecRed, iecGreen, iecBlue] );
Effect.Add( peGamma );
Effect.CurrentItem.GammaCorrection_Red   := True;
Effect.CurrentItem.GammaCorrection_Green := True;
Effect.CurrentItem.GammaCorrection_Blue  := True;
Effect.CurrentItem.GammaCorrection_Value := 2.0;
Effect.Apply();

See also: GammaCorrect

HSL Example

// Convert to gray
// Same as: ImageEnView1.Proc.HSLVar( 0, 100, 0 );
Effect.Add( peHSL );
Effect.CurrentItem.HSL_H := 0;
Effect.CurrentItem.HSL_S := -100;
Effect.CurrentItem.HSL_L := 0;
Effect.Apply();

See also: HSLvar

HSV Example

// Increase luminosity/brightness
// Same as: ImageEnView1.Proc.HSVvar(0, 0, 30);
Effect.Add( peHSV );
Effect.CurrentItem.HSV_H := 0;
Effect.CurrentItem.HSV_S := 0;
Effect.CurrentItem.HSV_V := 30;
Effect.Apply();

See also: HSVvar

Lens Effects Example

// Apply a lens effect to the center of the image
// Same as: ImageEnView1.Proc.Lens( bmp.Width div 2, bmp.Height div 2, bmp.Width, bmp.Height, 6 );
Effect.Add( peLens );
Effect.CurrentItem.Lens_Left   := bmp.Width,div 2;
Effect.CurrentItem.Lens_Top    := bmp.Height div 2;
Effect.CurrentItem.Lens_Width  := bmp.Width;
Effect.CurrentItem.Lens_Height := bmp.Height;
Effect.CurrentItem.Lens_Ref    := 6.0;
Effect.CurrentItem.Lens_Auto   := False;
Effect.Apply();

See also: Lens

Level Adjustment Example

// Shift the midpoint of the image to brighten it
// Same as: ImageEnView1.Proc.AdjustLevels( 0, 102, 201, 0, 255 );
Effect.Add( peLevels );
Effect.CurrentItem.Levels_Shadow       := 0;
Effect.CurrentItem.Levels_MidTone      := 102;
Effect.CurrentItem.Levels_Highlight    := 201;
Effect.CurrentItem.Levels_OutShadow    := 0;
Effect.CurrentItem.Levels_OutHighlight := 255;
Effect.Apply();

See also: AdjustLevels

Morphing - Opening Example

// Perform an erosion followed by a dilation
// Same as: ImageEnView1.Proc.Opening( 1 );
Effect.Add( peMorph );
Effect.CurrentItem.Morph_Filter  := MorphFilter_Opening;
Effect.CurrentItem.Morph_WinSize := 1;
Effect.Apply();

See also: Opening

Morphing - Closing Example

// Perform a dilation followed by an erosion
// Same as: ImageEnView1.Proc.Closing( 1 );
Effect.Add( peMorph );
Effect.CurrentItem.Morph_Filter  := MorphFilter_Closing;
Effect.CurrentItem.Morph_WinSize := 1;
Effect.Apply();

See also: Closing

Morphing - Minimum Example

// Set each pixel to the minimum value of all pixel values in the neighborhood
// Same as: ImageEnView1.Proc.Minimum( 1 );
Effect.Add( peMorph );
Effect.CurrentItem.Morph_Filter  := MorphFilter_Minimum;
Effect.CurrentItem.Morph_WinSize := 1;
Effect.Apply();

See also: Minimum

Morphing - Maximum Example

// Set each pixel to the maximum value of all pixel values in the neighborhood
// Same as: ImageEnView1.Proc.Maximum( 1 );
Effect.Add( peMorph );
Effect.CurrentItem.Morph_Filter  := MorphFilter_Maximum;
Effect.CurrentItem.Morph_WinSize := 1;
Effect.Apply();

See also: Maximum

Pixelization Example

// Apply pixelation to the selection (with blocks of 2% of image width+height)
// Same as: ImageEnView1.Proc.Pixelize( 0.02 );
Effect.Add( pePixelize );
Effect.CurrentItem.Pixelize_BlockSize := 0.02;
Effect.Apply();

See also: Pixelize

Resampling Example

// Resize the image so that it is no higher or wider than 100, but maintains the original aspect ratio
// Same as: ImageEnView1.Proc.Resample( 100, 100, rfLanczos3, True );
Effect.Add( peResize );
Effect.CurrentItem.Resize_ByPercent := False;
Effect.CurrentItem.Resize_Width  := 100;
Effect.CurrentItem.Resize_Height := 100;
Effect.CurrentItem.Resize_MaintainAR := True;
Effect.CurrentItem.Resize_QualityFilter := rfLanczos3;
Effect.Apply();

See also: Resample

Scaling Example

// Scale to half size
// Same as: ImageEnView1.Proc.Resample( 0.5, rfLanczos3 );
Effect.Add( peResize );
Effect.CurrentItem.Resize_ByPercent := True;
Effect.CurrentItem.Resize_Width  := 0.5;
Effect.CurrentItem.Resize_Height := 0.5;
Effect.CurrentItem.Resize_MaintainAR := True;
Effect.CurrentItem.Resize_QualityFilter := rfLanczos3;
Effect.Apply();

See also: Resample

RGB Example

// Apply a Red filter (subtracts the Green and Blue channels)
// Same as: ImageEnView1.Proc.IntensityRGBAll( 0, -255, -255 );
Effect.Add( peRGB );
Effect.CurrentItem.RGB_R := 0;
Effect.CurrentItem.RGB_G := -255;
Effect.CurrentItem.RGB_B := -255;
Effect.Apply();

See also: IntensityRGBAll

Rotate Example

// Rotate the image 45° clockwise at highest quality and make the non-image area transparent
// Same as: ImageEnView1.Proc.Rotate( -45, ierBicubic, clNone );
Effect.Add( peRotate );
Effect.CurrentItem.Rotate_Angle   := -45;
Effect.CurrentItem.Rotate_AndCrop := False;
Effect.CurrentItem.Rotate_BackgroundColor := clNone;
Effect.CurrentItem.Rotate_AntiAlias := ierBicubic;
Effect.Apply();

See also: Rotate

RotateAndCrop Example

// Rotate and crop a digital photo by 5 degrees
// Same as: ImageEnView1.Proc.RotateAndCrop( 5, ierBicubic, 0, iecaAngledPhoto );
Effect.Add( peRotate );
Effect.CurrentItem.Rotate_Angle   := 5;
Effect.CurrentItem.Rotate_AndCrop := True;
Effect.CurrentItem.Rotate_CropAlgorithm := iecaAngledPhoto;
Effect.CurrentItem.Rotate_AntiAlias := ierBicubic;
Effect.Apply();

See also: RotateAndCrop

Flip Example

// Flip horizontally
// Same as: ImageEnView1.Proc.Flip( fdHorizontal );
Effect.Add( peRotate );
Effect.CurrentItem.Flip_Horz := True;
Effect.CurrentItem.Flip_Vert := False;
Effect.Apply();

See also: Flip

Sharpen Example

// Apply a sharpening filter to the image
// Same as: ImageEnView1.Proc.Sharpen( 10, 4 );
Effect.Add( peSharpen );
Effect.CurrentItem.Sharpen_Sharpen := 10;
Effect.CurrentItem.Sharpen_Size    := 4;
Effect.Apply();

See also: Sharpen

Auto-Sharpen Example

// Automatically increase image sharpness by enhancing the contours of detected objects
// Same as: ImageEnView1.Proc.AutoSharp();
Effect.Add( peSharpen );
Effect.CurrentItem.Sharpen_Sharpen := 68;
Effect.CurrentItem.Sharpen_AutoSharp := True;
Effect.Apply();

See also: AutoSharp

Smoothing - SymmetricNearestNeighbour Example

// Apply a "Symmetric Nearest Neighbour" smoothing filter to the image
// Same as: ImageEnView1.Proc.SymmetricNearestNeighbour(6);
Effect.Add( peSmoothing );
Effect.CurrentItem.Smooth_Method := SmoothMethod_SymmetricNearestNeighbour;
Effect.CurrentItem.Smooth_Strength := 6;
Effect.Apply();

See also: SymmetricNearestNeighbour

Smoothing - Blur Example

// Apply a Gaussian Blur filter to reduce detail and noise
// Same as: ImageEnView1.Proc.Blur( 4 );
Effect.Add( peSmoothing );
Effect.CurrentItem.Smooth_Method := SmoothMethod_Blur;
Effect.CurrentItem.Smooth_Strength := 4;
Effect.Apply();

See also: Blur

Smoothing - UnsharpMask Example

// Apply a gaussian blur to the image
// Same as: ImageEnView1.Proc.UnsharpMask( 4 );
Effect.Add( peSmoothing );
Effect.CurrentItem.Smooth_Method:  := SmoothMethod_Unsharp;
Effect.CurrentItem.Smooth_Strength := 4;
Effect.Apply();

See also UnsharpMask

Smoothing - Denoising Example

// Perform image denoising using the Non-local Means Denoising algorithm
// Same as: ImageEnView1.IEBitmap.GetIEVisionImage().fastNlMeansDenoisingColored( 3, 3 );
Effect.Add( peSmoothing );
Effect.CurrentItem.Smooth_Method := SmoothMethod_fastNlMeansDenoisingColored;
Effect.CurrentItem.Smooth_Strength := 3;
Effect.Apply();

See also: fastNlMeansDenoisingColored

Smoothing - Bilateral Example

// Smooth image using Bilateral
// Same as: ImageEnView1.IEBitmap.GetIEVisionImage().smooth( ievBILATERAL, 5, 0, 30, 30 );
Effect.Add( peSmoothing );
Effect.CurrentItem.Smooth_Method := SmoothMethod_Smooth_Bilateral;
Effect.CurrentItem.Smooth_Strength := 3; // Smooth_Strength*10 is used for param3 and param4. Param1 is 5 for ievBILATERAL
Effect.Apply();

See also: smooth

Smoothing - Median Example

// Smooth image using Median
// Same as: ImageEnView1.IEBitmap.GetIEVisionImage().smooth( ievMEDIAN, 3 );
Effect.Add( peSmoothing );
Effect.CurrentItem.Smooth_Method := SmoothMethod_Smooth_Bilateral;
Effect.CurrentItem.Smooth_Strength := 3; // Smooth_Strength is used for param1 for ievBLUR, ievGAUSSIAN and ievMEDIAN. param2/3/4 are the default
Effect.Apply();

See also: smooth

Soft Shadow Example

// Add a shadow to the bottom-right of the image
// Same as: ImageEnView1.Proc.AddSoftShadow( 5, 4, iespBottomRight );
Effect.Add( peSoftShadow );
Effect.CurrentItem.Shadow_Color    := clBlack;
Effect.CurrentItem.Shadow_Position := iespBottomRight;  // or iespAll for Glow
Effect.CurrentItem.Shadow_Radius := 5;
Effect.CurrentItem.Shadow_Offset := 4;
Effect.Apply();

See also: AddSoftShadow

Inner Shadow Example

// Add a red shadow to the inner border of the image
// Same as: ImageEnView1.Proc.AddInnerShadow( 10, 0, 0, clRed );
Effect.Add( peSoftShadow );
Effect.CurrentItem.Shadow_Color    := clRed;
Effect.CurrentItem.Shadow_Position := iespInner;
Effect.CurrentItem.Shadow_Radius := 10;
Effect.CurrentItem.Shadow_Offset := 0;  // All sides
Effect.Apply();

See also: AddInnerShadow

User Filter Example

// Apply emboss filter
Const
  filter: TGraphFilter = ( Values: (( -1, 0, 1 ),
                                    ( -1, 1, 1 ),
                                    ( -1, 0, 1 ));
                           Divisor: 1 );
begin
  Effect.Add( peUserFilt );
  Effect.CurrentItem.UserFilter_Values := filter;
  Effect.Apply();
end;

See also: ApplyFilter

Other Color Methods - Colorize Example

// Colorize the image with a sepia look
// Same as: ImageEnView1.Proc.Colorize( 40, 50, 1.1 );
Effect.Add( peOtherColor );
Effect.CurrentItem.OtherColor_Method   := OtherColor_Colorize;
Effect.CurrentItem.Colorize_Hue        := 40;
Effect.CurrentItem.Colorize_Saturation := 50;
Effect.CurrentItem.Colorize_Luminosity := 1.1;
Effect.Apply();

See also: Colorize

Other Color Methods - Colorise Example

// Convert to gray levels
// Same as: ImageEnView1.Proc.ConvertToGray();
Effect.Add( peOtherColor );
Effect.CurrentItem.OtherColor_Method := OtherColor_ConvertToGray;
// Only default parameters used for: OtherColor_ConvertToGray, OtherColor_ConvertToSepia, OtherColor_Negative, OtherColor_WhiteBalance_GrayWorld
Effect.Apply();

See also: ConvertToGray, ConvertToSepia, Negative, WhiteBalance_GrayWorld

Other Effects - Wave Example

// Apply a wave effect to the image
// Same as: ImageEnView1.Proc.Wave( 10, 12, 0, false );
Effect.Add( peOtherEffects );
Effect.CurrentItem.OtherEffect_Method := OtherEffect_Wave;
Effect.CurrentItem.Wave_Amplitude  := 10;
Effect.CurrentItem.Wave_WaveLength := 12;
Effect.CurrentItem.Wave_Phase      := 0;
Effect.CurrentItem.Wave_Reflect    := False;
Effect.Apply();

See also: Wave

Other Effects - Pencil Sketch Example

// Transform image into a monochrome pencil sketch
// Same as: ImageEnView1.Proc.PencilSketch( True );
Effect.Add( peOtherEffects );
Effect.CurrentItem.OtherEffect_Method := OtherEffect_PencilSketch_Gray;
// Only default parameters used for: OtherEffect_PencilSketch_Gray, OtherEffect_PencilSketch_Color, OtherEffect_Reflection
Effect.Apply();

See also: PencilSketch, Reflection, Swirl, Cartoonify

Other Examples
// Display Effects Dialog with state saved between sessions
if FileExists( 'D:\State.dat' ) then
  ImageEnView1.Proc.IPDialogParams.LoadFromFile( 'D:\State.dat' );
ImageEnView1.Proc.DoPreviews( ppeSpecialEffects );
ImageEnView1.Proc.IPDialogParams.SaveToFile( 'D:\State.dat' );

// Default to the Rotate page
ImageEnView1.Proc.IPDialogParams.Operation := peRotate;
ImageEnView1.Proc.IPDialogParams.Rotate_Angle := 45;
ImageEnView1.Proc.DoPreviews( ppeEditingFunctions );

// Display the operation performed in the Previews dialog
if ImageEnView1.Proc.DoPreviews( ppeEditingFunctions ) then
  Caption := ImageEnView1.Proc.IPDialogParams.Description();

// Apply chain of editing operations to an image
var
  op: TIEImageEffect;
begin
  ImageEnView1.IO.LoadFromFile( 'D:\image.jpg' );
  ImageEnView1.IEBitmap.EffectsChain.Enabled := True;

  op := TIEImageEffect.Create();
  try
    // Reduce size by half
    op.Operation            := peResize;
    op.Resize_Width         := 50;
    op.Resize_Height        := 50;
    op.Resize_ByPercent     := True;
    op.Resize_QualityFilter := rfLanczos3;
    ImageEnView1.IEBitmap.EffectsChain.Add( op );

    // Enhance contrast
    op.Operation         := peContrast;
    op.Contrast_Contrast := 20;
    ImageEnView1.IEBitmap.EffectsChain.Add( op );

    // Rotate 45 deg. clockwise
    op.Operation              := peRotate;
    op.Rotate_Angle           := -45;
    op.Rotate_BackgroundColor := clBlack;
    op.Rotate_Antialias       := ierFast;
    ImageEnView1.IEBitmap.EffectsChain.Add( op );

    // Apply effects
    ImageEnView1.IEBitmap.EffectsChain.Apply();

    ImageEnView1.IO.SaveToFile( 'D:\image-Edit.jpg' );
  finally
    op.Free;
  end;
end;

// Prompt the user for an image editing effect and add it to our Effects Chain (TIEImageEffectsList)
op := TIEImageEffect.Create();
try
  if ImageEnView1.Proc.DoPreviews( ppeEditingFunctions, op ) then
  begin
    EffectsChain.Add( op );
    ListBox1.Items.Add( op.Description() );
  end;
finally
  op.Free;
end;

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