Leadtools.Codecs Namespace > RasterCodecs Class > Save Method : Save(RasterImage,String,RasterImageFormat,Int32,Int32,Int32,Int32,CodecsSavePageMode) Method |
Determines how to handle the page when saving to multipage formats. This can be one of the following:
Value | Meaning |
---|---|
CodecsSavePageMode.Append | Append the new page(s) to the end of the file. If the file does not exist, this option will create the file and add the pages to it. firstSavePageNumber is not used. |
CodecsSavePageMode.Insert | Insert the new page(s) at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Replace | Replace the page(s) starting at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Overwrite | Overwrite the page(s) starting at the index specified by firstSavePageNumber. |
public void Save( RasterImage image, string fileName, RasterImageFormat format, int bitsPerPixel, int firstPage, int lastPage, int firstSavePageNumber, CodecsSavePageMode pageMode )
'Declaration Public Overloads Sub Save( _ ByVal image As RasterImage, _ ByVal fileName As String, _ ByVal format As RasterImageFormat, _ ByVal bitsPerPixel As Integer, _ ByVal firstPage As Integer, _ ByVal lastPage As Integer, _ ByVal firstSavePageNumber As Integer, _ ByVal pageMode As CodecsSavePageMode _ )
'Usage Dim instance As RasterCodecs Dim image As RasterImage Dim fileName As String Dim format As RasterImageFormat Dim bitsPerPixel As Integer Dim firstPage As Integer Dim lastPage As Integer Dim firstSavePageNumber As Integer Dim pageMode As CodecsSavePageMode instance.Save(image, fileName, format, bitsPerPixel, firstPage, lastPage, firstSavePageNumber, pageMode)
public void Save( RasterImage image, string fileName, RasterImageFormat format, int bitsPerPixel, int firstPage, int lastPage, int firstSavePageNumber, CodecsSavePageMode pageMode )
function Leadtools.Codecs.RasterCodecs.Save(RasterImage,String,RasterImageFormat,Int32,Int32,Int32,Int32,CodecsSavePageMode)( image , fileName , format , bitsPerPixel , firstPage , lastPage , firstSavePageNumber , pageMode )
public: void Save( RasterImage^ image, String^ fileName, RasterImageFormat format, int bitsPerPixel, int firstPage, int lastPage, int firstSavePageNumber, CodecsSavePageMode pageMode )
Determines how to handle the page when saving to multipage formats. This can be one of the following:
Value | Meaning |
---|---|
CodecsSavePageMode.Append | Append the new page(s) to the end of the file. If the file does not exist, this option will create the file and add the pages to it. firstSavePageNumber is not used. |
CodecsSavePageMode.Insert | Insert the new page(s) at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Replace | Replace the page(s) starting at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Overwrite | Overwrite the page(s) starting at the index specified by firstSavePageNumber. |
If the image is 8 bits per pixel or greater, use the LEAD CMP format or one of the JPEG (JTIF or JFIF) formats to save disk space.
If the image is 1-bit per pixel, use the LEAD 1-bit format or a CCITT Group 3 or 4 format to save disk space.
If the image has a region, the region stored in the image will be saved, if the image is saved as one of the TIFF file formats. For more information, refer to Saving A Region. Note, however, that the ability to save a region inside a TIFF file must be unlocked. This requires a Document Imaging or Medical Imaging toolkit.
Only TIFF and DICOM file formats are capable of saving images that have been window-leveled. Images can be window-leveled by calling RasterImage.WindowLevel and specifying RasterWindowLevelMode.PaintAndProcessing, by using the Leadtools.ImageProcessing.Core.WindowLevelCommand or by loading an image from a file format that supports Window Leveling. If a window-leveled image is saved as any other file format, the image data will be converted before being saved. For more information, refer to Saving Window-Leveled Images.
Use the CodecsSaveOptions class to set up other save options parameters before calling this method.
Use FormatSupportsMultipageSave to determine if the format supports saving into a multi-page file.
Use to the SaveImage event to provide progress feedback or to set or modify the saved image data.
This method supports signed data images, but only DICOM and TIFF formats support signed data. This method will throw an exception if you attempt to save a signed image to a format other than DICOM or TIFF.
In LEADTOOLS version 17 and up, when saving a colored image (such as a 24-bits per pixel image) to bitonal (1-bit per pixel), the RasterCodecs object will not use any dithering when converting the image data. This is done because dithering is not the recommended when converting colored images containing text for document processing such as OCR and Barcode. The resulting text will be fuzzy and hard for a recognition engine to process. To save a colored image as bitonal with Floyd-Stein dithering (the behavior of LEADTOOLS 16.5 and earlier) use CodecsSaveOptions.UseImageDitheringMethod along with RasterImage.DitheringMethod as illustrated below:
// 'codecs' is the RasterCodecs to use when saving
// 'image' is a colored RasterImage object
// Setup FloydStein dithering:
codecs.Options.Save.UseImageDitheringMethod = true;
image.DitheringMethod = RasterDitheringMethod.FloydStein;
// Save the image as 1-bpp with auto-dithering:
codecs.Save(image, fileName, RasterImageFormat.Tif, 1);
For information about quality factors, refer to Compression Quality Factors.
Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.ImageProcessing Imports Leadtools.ImageProcessing.Color Imports Leadtools.Drawing Public Sub SaveFile2Example() Dim codecs As RasterCodecs = New RasterCodecs() Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_SaveFile2.tif") ' Create a RasterImage with 4 pages containing text showing the page number Dim image As RasterImage = Nothing Const pageCount As Integer = 4 Using f As New System.Drawing.Font("Arial", 36, System.Drawing.FontStyle.Bold) Using btmp As New System.Drawing.Bitmap(320, 200) Using sf As New System.Drawing.StringFormat() Dim rc As New System.Drawing.Rectangle(0, 0, btmp.Width, btmp.Height) sf.Alignment = System.Drawing.StringAlignment.Center sf.LineAlignment = System.Drawing.StringAlignment.Center For i As Integer = 1 To pageCount ' Create a GDI+ bitmap with the text Dim text As String = "Page " + i.ToString() Using g As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(btmp) g.FillRectangle(System.Drawing.Brushes.White, rc) g.DrawString(text, f, System.Drawing.Brushes.Black, rc, sf) End Using Dim tempImage As RasterImage = RasterImageConverter.ConvertFromImage(btmp, ConvertFromImageOptions.None) If image Is Nothing Then image = tempImage Else image.AddPage(tempImage) End If Next End Using End Using End Using ' Save all the pages to the file ' The file should have 4 pages now: 1, 2, 3, 4 codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, pageCount, 1, CodecsSavePageMode.Overwrite) image.Dispose() ' Load the 3rd page and insert it as the second ' The file should have 5 pages now: 1, 3, 2, 3, 4 image = codecs.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 3, 3) codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, 1, 2, CodecsSavePageMode.Insert) image.Dispose() ' Load the last page, and insert it as the first ' The file should have 5 pages now: 4, 1, 3, 2, 3, 4 image = codecs.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 5, 5) codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, 1, 1, CodecsSavePageMode.Insert) image.Dispose() ' Replace the 5th page with the 2nd ' The file should have 5 pages now: 4, 1, 3, 2, 1, 4 image = codecs.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 2, 2) codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, 1, 5, CodecsSavePageMode.Replace) image.Dispose() ' Delete the 2nd and 6th pages ' The file should have 5 pages now: 4, 3, 2, 1 codecs.DeletePage(destFileName, 2) ' Notice, -1 because we already deleted a page, so 6th page is not 5th codecs.DeletePage(destFileName, 6 - 1) ' Clean up codecs.Dispose() End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class
using Leadtools; using Leadtools.Codecs; using Leadtools.ImageProcessing; using Leadtools.ImageProcessing.Color; public void SaveFile2Example() { RasterCodecs codecs = new RasterCodecs(); string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_SaveFile2.tif"); // Use GDI+ to create a RasterImage with 4 pages containing text showing the page number RasterImage image = null; const int pageCount = 4; using (System.Drawing.Font f = new System.Drawing.Font("Arial", 36, System.Drawing.FontStyle.Bold)) using (System.Drawing.Bitmap btmp = new System.Drawing.Bitmap(320, 200)) using (System.Drawing.StringFormat sf = new System.Drawing.StringFormat()) { System.Drawing.Rectangle rc = new System.Drawing.Rectangle(0, 0, btmp.Width, btmp.Height); sf.Alignment = System.Drawing.StringAlignment.Center; sf.LineAlignment = System.Drawing.StringAlignment.Center; for (int i = 1; i <= pageCount; i++) { // Create a GDI+ bitmap with the text string text = "Page " + i; using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(btmp)) { g.FillRectangle(System.Drawing.Brushes.White, rc); g.DrawString(text, f, System.Drawing.Brushes.Black, rc, sf); } RasterImage tempImage = Leadtools.Drawing.RasterImageConverter.ConvertFromImage(btmp, Leadtools.Drawing.ConvertFromImageOptions.None); if (image == null) image = tempImage; else image.AddPage(tempImage); } } // Save all the pages to the file // The file should have 4 pages now: 1, 2, 3, 4 codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, pageCount, 1, CodecsSavePageMode.Overwrite); image.Dispose(); // Load the 3rd page and insert it as the second // The file should have 5 pages now: 1, 3, 2, 3, 4 image = codecs.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 3, 3); codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, 1, 2, CodecsSavePageMode.Insert); image.Dispose(); // Load the last page, and insert it as the first // The file should have 5 pages now: 4, 1, 3, 2, 3, 4 image = codecs.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 5, 5); codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, 1, 1, CodecsSavePageMode.Insert); image.Dispose(); // Replace the 5th page with the 2nd // The file should have 5 pages now: 4, 1, 3, 2, 1, 4 image = codecs.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 2, 2); codecs.Save(image, destFileName, RasterImageFormat.Tif, 1, 1, 1, 5, CodecsSavePageMode.Replace); image.Dispose(); // Delete the 2nd and 6th pages // The file should have 5 pages now: 4, 3, 2, 1 codecs.DeletePage(destFileName, 2); // Notice, -1 because we already deleted a page, so 6th page is not 5th codecs.DeletePage(destFileName, 6 - 1); // Clean up codecs.Dispose(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; }
using Leadtools; using Leadtools.Codecs; using Leadtools.Examples; using Leadtools.ImageProcessing; using Leadtools.ImageProcessing.Color; using Leadtools.Windows.Media; public void SaveStream2Example(int width, int height, int pageCount, Stream outStreamTif) { RasterCodecs codecs = new RasterCodecs(); // Create a RasterImage with 4 pages containing text showing the page number RasterImage image = null; // The white background canvas Canvas canvas = new Canvas(); canvas.Width = width; canvas.Height = height; canvas.Background = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255)); // The black text block TextBlock textBlock = new TextBlock(); textBlock.FontFamily = new FontFamily("Arial"); textBlock.FontSize = 36; textBlock.Foreground = new SolidColorBrush(Color.FromArgb(255, 0, 0, 0)); canvas.Children.Add(textBlock); for (int i = 1; i <= pageCount; i++) { // The text we want on the page string text = "Page " + i; textBlock.Text = text; // Center the text double left = (canvas.Width - textBlock.ActualWidth) / 2; double top = (canvas.Height - textBlock.ActualHeight) / 2; textBlock.SetValue(Canvas.LeftProperty, left); textBlock.SetValue(Canvas.TopProperty, top); // Create a Writeable bitmap with the text WriteableBitmap wb = new WriteableBitmap(width, height); wb.Render(canvas, null); wb.Invalidate(); // Convert it to a RasterImage RasterImage pageImage = RasterImageConverter.ConvertFromSource(wb, ConvertFromSourceOptions.None); // Add it as a page to our main raster image if (image == null) image = pageImage; else image.AddPage(pageImage); } // Save all the pages to the file // The file should have 4 pages now: 1, 2, 3, 4 codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, pageCount, 1, CodecsSavePageMode.Overwrite); image.Dispose(); // Load the 3rd page and insert it as the second // The file should have 5 pages now: 1, 3, 2, 3, 4 image = codecs.Load(outStreamTif, 0, CodecsLoadByteOrder.BgrOrGray, 3, 3); codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, 1, 2, CodecsSavePageMode.Insert); image.Dispose(); // Load the last page, and insert it as the first // The file should have 5 pages now: 4, 1, 3, 2, 3, 4 image = codecs.Load(outStreamTif, 0, CodecsLoadByteOrder.BgrOrGray, 5, 5); codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, 1, 1, CodecsSavePageMode.Insert); image.Dispose(); // Replace the 5th page with the 2nd // The file should have 5 pages now: 4, 1, 3, 2, 1, 4 image = codecs.Load(outStreamTif, 0, CodecsLoadByteOrder.BgrOrGray, 2, 2); codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, 1, 5, CodecsSavePageMode.Replace); image.Dispose(); // Delete the 2nd and 6th pages // The file should have 5 pages now: 4, 3, 2, 1 codecs.DeletePage(outStreamTif, 2); // Notice, -1 because we already deleted a page, so 6th page is not 5th codecs.DeletePage(outStreamTif, 6 - 1); }
Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.ImageProcessing Imports Leadtools.ImageProcessing.Color Imports Leadtools.Windows.Media Public Sub SaveStream2Example(ByVal width As Integer, ByVal height As Integer, ByVal pageCount As Integer, ByVal outStreamTif As Stream) Dim codecs As RasterCodecs = New RasterCodecs() ' Create a RasterImage with 4 pages containing text showing the page number Dim image As RasterImage = Nothing ' The white background canvas Dim canvas As Canvas = New Canvas() canvas.Width = width canvas.Height = height canvas.Background = New SolidColorBrush(Color.FromArgb(255, 255, 255, 255)) ' The black text block Dim textBlock As TextBlock = New TextBlock() textBlock.FontFamily = New FontFamily("Arial") textBlock.FontSize = 36 textBlock.Foreground = New SolidColorBrush(Color.FromArgb(255, 0, 0, 0)) canvas.Children.Add(textBlock) Dim i As Integer = 1 Do While i <= pageCount ' The text we want on the page Dim text As String = "Page " & i textBlock.Text = text ' Center the text Dim left As Double = (canvas.Width - textBlock.ActualWidth) / 2 Dim top As Double = (canvas.Height - textBlock.ActualHeight) / 2 textBlock.SetValue(Canvas.LeftProperty, left) textBlock.SetValue(Canvas.TopProperty, top) ' Create a Writeable bitmap with the text Dim wb As WriteableBitmap = New WriteableBitmap(width, height) wb.Render(canvas, Nothing) wb.Invalidate() ' Convert it to a RasterImage Dim pageImage As RasterImage = RasterImageConverter.ConvertFromSource(wb, ConvertFromSourceOptions.None) ' Add it as a page to our main raster image If image Is Nothing Then image = pageImage Else image.AddPage(pageImage) End If i += 1 Loop ' Save all the pages to the file ' The file should have 4 pages now: 1, 2, 3, 4 codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, pageCount, 1, CodecsSavePageMode.Overwrite) image.Dispose() ' Load the 3rd page and insert it as the second ' The file should have 5 pages now: 1, 3, 2, 3, 4 image = codecs.Load(outStreamTif, 0, CodecsLoadByteOrder.BgrOrGray, 3, 3) codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, 1, 2, CodecsSavePageMode.Insert) image.Dispose() ' Load the last page, and insert it as the first ' The file should have 5 pages now: 4, 1, 3, 2, 3, 4 image = codecs.Load(outStreamTif, 0, CodecsLoadByteOrder.BgrOrGray, 5, 5) codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, 1, 1, CodecsSavePageMode.Insert) image.Dispose() ' Replace the 5th page with the 2nd ' The file should have 5 pages now: 4, 1, 3, 2, 1, 4 image = codecs.Load(outStreamTif, 0, CodecsLoadByteOrder.BgrOrGray, 2, 2) codecs.Save(image, outStreamTif, RasterImageFormat.Tif, 1, 1, 1, 5, CodecsSavePageMode.Replace) image.Dispose() ' Delete the 2nd and 6th pages ' The file should have 5 pages now: 4, 3, 2, 1 codecs.DeletePage(outStreamTif, 2) ' Notice, -1 because we already deleted a page, so 6th page is not 5th codecs.DeletePage(outStreamTif, 6 - 1) End Sub