By default, the preview image is output at the display size (size of the PreviewImageEnView) to improve performance. For a full size preview, enabled PreviewFullSize.
Note: ◼Performance may be slow for large images ◼The preview image is actually the final result, so you do not need to call ApplyCurve
// Display a full size preview of curve effect in ImageEnView1 IEColorCurve1.PreviewFullSize := True; IEColorCurve1.PreviewImageEnView := ImageEnView1;