TImageEnProc.HSVvar

Declaration

procedure HSVvar(Hue, Sat, Val: Integer);

Description

Adjust the Hue, Saturation and Value of the selected region.

Parameter	Description
Hue	Offset to add to the Hue channel, from -180 to +180
Sat	Offset to add to the Saturation channel, from -100 to +100
Val	Offset to add to the Value channel, from -100 to +100

Note:
◼ A UI for this is available to your users in the Image Processing dialog
◼ If the image PixelFormat is not ie24RGB or ie32RGB, it will be converted

Demo

Demos\ImageEditing\EveryMethod\EveryMethod.dpr

Alternative Methods

There are multiple methods that will be adjust the brightness (luminosity) of an image:
◼ IntensityRGBAll:
  ImageEnView1.Proc.IntensityRGBall(20, 20, 20); // Increase luminosity by 20 (the fastest)

◼ AdjustBrightnessContrastSaturation:
  ImageEnView1.Proc.AdjustBrightnessContrastSaturation(20, 0, 0); // Increase luminosity by 20

◼ HSLvar:
  ImageEnView1.Proc.HSLvar(0, 0, 20); // Increase luminosity of by (slow but more accurate)

◼ HSVvar:
  ImageEnView1.Proc.HSVvar(0, 0, 20); // Increase luminosity of by (slow but more accurate)

Examples

// Increase luminosity/brightness
ImageEnView1.Proc.HSVvar(0, 0, 30);

// Convert to gray
ImageEnView1.Proc.HSVvar(0, -100, 0);

// Load test image
ImageEnView1.IO.LoadFromFile( 'D:\TestImage.jpg' );

// Change the Hue, Saturation and Value
ImageEnView1.Proc.HSVvar( 30, 10, 10 );

TImageEnProc.HSVvar