api:dk11:delphi:gispixelfilter.tgis_pixelfilterabstract
Table of Contents
TGIS_PixelFilterAbstract class
DK11 for Delphi | GisPixelFilter.TGIS_PixelFilterAbstract | Classes | Constructors | Fields | Methods | Properties | Events
Abstract class for all pixel layer filters.
Syntax
// Delphi type TGIS_PixelFilterAbstract = class( TGIS_Object ) end;
// C++ Builder class PASCALIMPLEMENTATION TGIS_PixelFilterAbstract : public TGIS_Object { };
Inheritance
→ TObject → TGIS_Object
Constructors
Inherited
Overrides
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| Create | public | Creates an instance. | |
Fields
Inherited
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| aBlock | protected | Currently processed block. | |
| bCompound | protected | If True, then the filter is a compound filter. | |
| bPrepare | protected | If True, then the filter must be prepared before execution; False by default. | |
| bProcPixel | protected | If True, then the filter processes pixel-by-bixel instead of blocks; False by default. | |
| dstNoData | protected | NoData value of the destination layer. | |
| iBlockSize | protected | Size of the filter block (row/column length). | |
| iValueCnt | protected | Number of valid values in the current block. | |
| oBounds | protected | Bounds of the source layer. | |
| srcLock | protected | Pixel lock of the source layer. | |
| srcMaxVal | protected | Maximum value of the source layer. | |
| srcMinVal | protected | Minimum value of the source layer. | |
| srcNoData | protected | NoData value of the source layer. | |
| srcValue | protected | Value (or lightness) of the current pixel of the source layer. | |
Methods
Inherited
Overrides
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| Execute | public | Applies the filter on the source layer. | |
| getValue | protected | Gets the pixel value for a given position within the pixel lock bands. | |
| maskToString | protected | Prepares a string representation of a mask array. | |
| prepareMask | protected | Prepares mask array from a string representation(comma-separated integers). | |
| prepFilter | protected | Prepares the filter if necessary (if bPrepare=True). | |
| procBlock | protected | Processes current block (if bSkipBlock=False). | |
| procCompound | protected | Processes image using other filters. | |
| procPixel | protected | Processes current pixel (if bSkipBlock=True). | |
| raiseBusyEvent | protected | Prepares and raises the BusyEvent. | |
Properties
Inherited
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| Band | public | Defines the band to be processed; if set to zero then all bands will be processed; default is 1. | |
| ColorSpace | public | Defines the color space in which the image will be processed; default is HSL. | |
| DestinationLayer | public | Destination layer, pixel (image or grid); if nil then the source layer will be altered. | |
| SourceLayer | public | Source layer, pixel (image or grid). | |
Events
References
2020/05/08 01:12