ImagesDifference

Overview

ImagesDifference is a class in Aspose.PDF FOSS for .NET. Inherits from: IDisposable.

Result of a graphical comparison of two rendered PDF pages: the first (source) page rasterised to a 24bpp bitmap, plus a per-pixel record of where the second (destination) page differs from it.

This class provides 3 methods for working with ImagesDifference objects in .NET programs. Available methods include: DifferenceToImage, Dispose, GetDestinationImage. All public members are accessible to any .NET application after installing the Aspose.PDF FOSS for .NET package. Properties: Difference, Height, SourceImage, Stride.

Properties

Name	Type	Access	Description
`SourceImage`	`Bitmap`	Read	The first (source) page rendered to a 24bpp RGB bitmap.
`Difference`	`int[]`	Read	Per-pixel difference record, row-major (index = y * Width + x).
`Stride`	`int`	Read	Row stride (in bytes) of SourceImage at 24bpp.
`Height`	`int`	Read	Pixel height of the compared images.

Methods

Signature	Description
`GetDestinationImage()`	Reconstruct the second (destination) page image: identical pixels are copied from the source, differing pixels take their recorded destination colour.
`DifferenceToImage(color: Color, backgroundColor: Color)`	Produce a difference mask: color where the two pages differ and backgroundColor where they are identical.
`Dispose()`	Calls Dispose on this ImagesDifference instance.