Class TBGRAContourScanner

Unit

BGRAFilterScanner

Declaration

type TBGRAContourScanner = class(TBGRA3X3FilterScanner)

Description

Scanner that computes the contour of the elements of an image.

It computes a grayscale image, then for each pixel calculates the difference with surrounding pixels (in intensity and alpha) and draw black pixels when there is a difference.

Hierarchy

• IInterface
• IBGRAScanner
• TBGRACustomScanner
• TBGRAFilterScanner
• TBGRAFilterScannerMultipixel
• TBGRA3X3FilterScanner
• TBGRAContourScanner

Overview

Fields

	FGammaCorrection: boolean;
	FOpacity: byte;

Methods

	constructor Create(ASource: TBGRACustomBitmap; AGammaCorrection: boolean = False); overload;
	constructor Create(ASource: IBGRAScanner; ABounds: TRect; AGammaCorrection: boolean = False); overload;
	function DoFilter3X3(PTop,PMiddle,PBottom: PBGRAPixel): TBGRAPixel; override;

Properties

property Opacity: Byte read FOpacity write FOpacity;

Description

Fields

	FGammaCorrection: boolean;
This item has no description.

	FOpacity: byte;
This item has no description.

Methods

	constructor Create(ASource: TBGRACustomBitmap; AGammaCorrection: boolean = False); overload;
This item has no description.

	constructor Create(ASource: IBGRAScanner; ABounds: TRect; AGammaCorrection: boolean = False); overload;
This item has no description.

	function DoFilter3X3(PTop,PMiddle,PBottom: PBGRAPixel): TBGRAPixel; override;
This item has no description.

Properties

	property Opacity: Byte read FOpacity write FOpacity;
This item has no description.