Working with Images

Extract Images from a OneNote Document

All images are stored inside image nodes in a OneNote document.

Extract Images

To extract all images or from a OneNote document, follow these steps:

1. Use the Document.getChildNodes method to select all Image nodes.
2. Iterate through the resulting Image node collections.
3. Extract image bytes array using the Image.Bytes property.
4. Save image bytes to a file.

This example shows how to extract images from a OneNote document and save them as files.

String dataDir = Utils.getSharedDataDir(ExtractImages.class) + "images/";

// Load the document into Aspose.Note
Document doc = new Document(dataDir + "Sample1.one");

// Get all images
List<Image> list = doc.getChildNodes(Image.class);
System.out.printf("Total Images: %s\n\n", list.size());

// Traverse the list
for (int i = 0; i < list.size(); i++) {
	Image image = list.get(i);

	String outputFile = "ExtractImages_out" + i + "_" + image.getFileName();

	byte[] buffer = image.getBytes();
	Files.write(Paths.get(dataDir + outputFile), buffer);
	System.out.printf("File saved: %s\n", dataDir);
}

Get Information of Each Image from the OneNote Document

The Image class provides all the image properties for images in OneNote documents. All the images of the OneNote file are contained by image nodes in the Document object.

Get Information

String dataDir = Utils.getSharedDataDir(GetImageInfo.class) + "images/";

// Load the document into Aspose.Note
Document doc = new Document(dataDir + "Sample1.one");

// Get all images
List<Image> list = doc.getChildNodes(Image.class);
System.out.printf("Total Images: %s\n\n", list.size());

// Traverse the list
for (Image image : list) {
	System.out.println("Width: " + image.getWidth());
	System.out.println("Height: " + image.getHeight());
	System.out.println("OriginalWidth: " + image.getOriginalWidth());
	System.out.println("OriginalHeight: " + image.getOriginalHeight());
	System.out.println("FileName: " + image.getFileName());
	System.out.println("LastModifiedTime: " + image.getLastModifiedTime());
	System.out.println();
}

Adding Image to a OneNote Document Page and Saving as PDF

Aspose.Diagram for JAVA APIs now allows inserting an image anywhere on the OneNote document.

These examples show how to:

• Insert an Image in an Existing OneNote Document.
• Build a OneNote Document from Scratch and Insert an Image.
• Build a OneNote Document from Scratch and Insert an Image using an image stream

Insert an Image in an Existing OneNote Document

To insert an image on a OneNote document, follow these steps:

1. Use the Document.getFirstChild() property to get the first page.
2. Use the Image class constructor to load the image.
3. Use the Image.getWidth() and Image.getHeight() properties to adjust size of the image.
4. Use the Image.getVerticalOffset() and Image.getHorizontalOffset() properties to set location of the image.
5. Use the Page.appendChild() property to insert the image.
6. Save a OneNote document.

This example shows how to insert an image on a OneNote document and save them as files.

// load document from the stream.
LoadOptions options = new LoadOptions();

String dataDir = Utils.getSharedDataDir(InsertanImage.class) + "images/";
		
Document oneFile = new Document(dataDir + "Sample1.one", options);

// get the first page of the document.
Page page = oneFile.getFirstChild();

// load an image from the file.
Image image = new Image(oneFile, dataDir + "Input.jpg");
// change the image's size according to your needs (optional).
image.setWidth(100);
image.setHeight(100);
// set the image's location in the page (optional).
image.setVerticalOffset(400);
image.setHorizontalOffset(100);
// set image alignment
image.setAlignment(HorizontalAlignment.Right);
// add the image to the page.
page.appendChildLast(image);

// save the document in the *.one format.
try {
	// oneFile.save("D://Aspose_JavaProjects//OneNote//out.one");//NOT
	// working
	oneFile.save(dataDir + "InsertanImage_out.pdf", SaveFormat.Pdf);// WORKING
} catch (IOException e) {
	e.printStackTrace();
}

Build a OneNote Document from the Scratch and Insert an Image

This example shows how to build a new OneNote document and insert an image by file path.

String dataDir = Utils.getSharedDataDir(BuildDocAndInsertImage.class) + "images/";
// create an object of the Document class
Document doc = new Document();
// initialize Page class object
Page page = new Page(doc);
// initialize Outline class object and set offset properties
Outline outline = new Outline(doc);
outline.setVerticalOffset(0);
outline.setHorizontalOffset(0);
// initialize OutlineElement class object
OutlineElement outlineElem = new OutlineElement(doc);
// load an image by the file path.
Image image = new Image(doc, dataDir + "Input.jpg");
// set image alignment
image.setAlignment(HorizontalAlignment.Right);
// add image
outlineElem.appendChildLast(image);
// add outline elements
outline.appendChildLast(outlineElem);
// add Outline node
page.appendChildLast(outline);
// add Page node
doc.appendChildLast(page);
// save OneNote document
// save the document in the *.one format.
try {
	// oneFile.save("D://Aspose_JavaProjects//OneNote//out.one");//NOT
	// working
	doc.save(dataDir + "NewOneNotedocument_out", SaveFormat.Pdf);// WORKING
} catch (IOException e) {
	e.printStackTrace();
}

Build a OneNote Document from the Scratch and Insert an Image using an Image Stream

This example shows how to build a new OneNote document and insert an image using the image stream.

String dataDir = Utils.getSharedDataDir(BuildDocAndInsertImageUsingImageStream.class) + "images/";

// create an object of the Document class
Document doc = new Document();
// initialize Page class object
Page page = new Page(doc);

Outline outline1 = new Outline(doc);
outline1.setVerticalOffset(600);
outline1.setHorizontalOffset(0);
OutlineElement outlineElem1 = new OutlineElement(doc);
InputStream fs = null;
try {
	fs = new FileInputStream(dataDir + "image.jpg");
} catch (FileNotFoundException e) {
	e.printStackTrace();
}

// Load the second image using the image name, extension and stream.
Image image = new Image(doc, dataDir + "image1.jpg");
// set image alignment
image.setAlignment(HorizontalAlignment.Right);

outlineElem1.appendChildLast(image);
outline1.appendChildLast(outlineElem1);
page.appendChildLast(outline1);

doc.appendChildLast(page);
// save OneNote document
try {
	doc.save("D://Aspose_JavaProjects//OneNote//out3.pdf",SaveFormat.Pdf);
} catch (IOException e) {
	e.printStackTrace();
}

Support for Image Alternative Text

String dataDir = Utils.getSharedDataDir(AlternativeText.class) + "images/";

Document document = new Document();

Page page = new Page(document);

Image image = new Image(document, dataDir + "image.jpg");

image.setAlternativeTextTitle("ImageAlternativeText Title");
		
image.setAlternativeTextDescription("ImageAlternativeText Description");

page.appendChildLast(image);

document.appendChildLast(page);

document.save(dataDir + "AlternativeText_out.one");

Link an Image to Hyperlink

Document document = new Document();
Page page = new Page(document);
Image image = new Image(document, dataDir + "image1.jpg");
image.setHyperlinkUrl( "http://www.aspose.com");
page.appendChildLast(image);
document.appendChildLast(page);
document.save(dataDir + "HyperlinkToImage_out.one");