ResolutionThreshold

DownsampleOptions.ResolutionThreshold property

Specifies the threshold resolution in pixels per inch. If resolution of an image in the document is less than threshold value, the downsampling algorithm will not be applied. A value of 0 means the threshold check is not used and all images that can be reduced in size are downsampled.

public int ResolutionThreshold { get; set; }

Remarks

The default value is 0.

Examples

Shows how to change the resolution of images in the PDF document.

Document doc = new Document(MyDir + "Images.docx");

// Create a "PdfSaveOptions" object that we can pass to the document's "Save" method
// to modify how that method converts the document to .PDF.
PdfSaveOptions options = new PdfSaveOptions();

// By default, Aspose.Words downsample all images in a document that we save to PDF to 220 ppi.
Assert.True(options.DownsampleOptions.DownsampleImages);
Assert.AreEqual(220, options.DownsampleOptions.Resolution);
Assert.AreEqual(0, options.DownsampleOptions.ResolutionThreshold);

doc.Save(ArtifactsDir + "PdfSaveOptions.DownsampleOptions.Default.pdf", options);

// Set the "Resolution" property to "36" to downsample all images to 36 ppi.
options.DownsampleOptions.Resolution = 36;

// Set the "ResolutionThreshold" property to only apply the downsampling to
// images with a resolution that is above 128 ppi.
options.DownsampleOptions.ResolutionThreshold = 128;

// Only the first two images from the document will be downsampled at this stage.
doc.Save(ArtifactsDir + "PdfSaveOptions.DownsampleOptions.LowerResolution.pdf", options);

See Also

DownsampleOptions.Resolution