ImageEn, unit imageenproc

TImageEnProc.HSLvar

TImageEnProc.HSLvar


Declaration

procedure HSLvar(Hue, Sat, Lum: Integer);


Description

Adjust the Hue, Saturation and Luminosity 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.
Lum Offset to add to the Luminosity channel, from -100 to +100.

Notes:
- 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

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

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

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


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

  

// Change the Hue, Saturation and Luminosity
ImageEnView1.Proc.HSLvar( 30, 10, 10 );