ImageEn, unit imageenproc

TImageEnProc.IntensityRGBAll

TImageEnProc.IntensityRGBAll


Declaration

procedure IntensityRGBAll(R, G, B: Integer);


Description

Adjust the RGB channels of the current image or the selected region.
R, G and B are the channel offsets, from -255 to +255.
Negative values darken all the pixels in the image. Positive values lighten all pixels in the image. To darken colors use IntensityRGBAll (-10, -10, -10). To lighten colors use IntensityRGBAll (10, 10, 10).
Also see AdjustBrightnessContrastSaturation which uses a non-linear LUT to adjust the pixel colors. IntensityRGBAll adjusts the pixel colors by adding or subtracting the R, G, B values to each pixel in the image.

Note:
- A UI for this is available to your users in the Image Processing dialog
- Also available as a RetouchTool by setting MouseInteractGeneral to [miRetouchTool] and RetouchMode to iermBrightness
- 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:
- TImageEnProc.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)


Example

// Remove the Red channel
ImageEnView1.Proc.IntensityRGBAll( -255, 0, 0 );


// Apply a Red filter (subtracts the Green and Blue channels)
ImageEnView1.Proc.IntensityRGBAll( 0, -255, -255 );


// Apply a darken filter (subtracts the same value from all channels)
ImageEnView1.Proc.IntensityRGBAll( -10, -10, -10 );


// Apply a lighten filter (adds the same value to all channels)
ImageEnView1.Proc.IntensityRGBAll( 10, 10, 10 );


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

  

// Adjust the RGB channel
ImageEnView1.Proc.IntensityRGBAll( 5, 10, 15 );