Class Optimizer.MonoImageSettings
A class that stores image downsampling/recompression settings for monochrome images.
Inherited Members
Namespace: pdftron.PDF
Assembly: PDFNet.dll
Syntax
public class Optimizer.MonoImageSettingsConstructors
MonoImageSettings()
create an MonoImageSettings object with default options
Declaration
public MonoImageSettings()Methods
ForceChanges(bool)
Sets whether image changes that grow the PDF file should be kept. This is off by default.
Declaration
public void ForceChanges(bool force)Parameters
| Type | Name | Description |
|---|---|---|
| bool | force | if true all image changes will be kept. |
ForceRecompression(bool)
Sets whether recompression to the specified compression method should be forced when the image is not downsampled. By default the compression method for these images
Declaration
public void ForceRecompression(bool force)Parameters
| Type | Name | Description |
|---|---|---|
| bool | force | if true the compression method for all images will be changed to the specified compression mode |
SetCompressionMode(CompressionMode)
Sets the output compression mode for monochrome images The default value is e_ccitt (CCITT group 4 compression)
Declaration
public void SetCompressionMode(Optimizer.MonoImageSettings.CompressionMode mode)Parameters
| Type | Name | Description |
|---|---|---|
| Optimizer.MonoImageSettings.CompressionMode | mode | the compression mode to set |
SetDownsampleMode(DownsampleMode)
Sets the downsample mode for monochrome images The default value is e_default
Declaration
public void SetDownsampleMode(Optimizer.MonoImageSettings.DownsampleMode mode)Parameters
| Type | Name | Description |
|---|---|---|
| Optimizer.MonoImageSettings.DownsampleMode | mode | the compression mode to set |
SetImageDPI(double, double)
Sets the maximum and resampling dpi for monochrome images. By default these are set to 144 and 96 respectively.
Declaration
public void SetImageDPI(double maximum, double resampling)Parameters
| Type | Name | Description |
|---|---|---|
| double | maximum | the highest dpi of an image before it will be resampled |
| double | resampling | the image dpi to resample to if an image is encountered over the maximum dpi |
SetJBIG2Threshold(double)
Sets the quality for lossy JBIG2Decode compression mode. The threshold is a floating point number in the range from 4 to 9 The default value for JBIG2 is 8.5. The setting is ignored for FLATE.
Declaration
public void SetJBIG2Threshold(double jbig2_threshold)Parameters
| Type | Name | Description |
|---|---|---|
| double | jbig2_threshold | The jbig2 threshold value |