Image

类：Image

Properties: aspose.note Properties: from aspose.note import Image Properties: CompositeNode

Image 表示存储在 OneNote 中的嵌入式图像 .one 文件。它公开原始图像字节、原始文件名、渲染尺寸、替代文本、超链接 URL（如果有），以及附加到图像的任何 OneNote 标签。.

Properties

Name	Type	Access	Description
`FileName`	`str	None`	Read
`FilePath`	`str	None`	Read
`Format`	`str	None`	Read
`Bytes`	`bytes`	Read	Gets the bytes.
`OriginalWidth`	`float	None`	Read
`OriginalHeight`	`float	None`	Read
`Tags`	`list[NoteTag]`	Read	Gets the tags.
`Alignment`	`HorizontalAlignment	None`	Read/Write
`Width`	``	Read	Gets the width.
`Height`	``	Read	Gets the height.
`HorizontalOffset`	``	Read	Gets the horizontal offset.
`VerticalOffset`	``	Read	Gets the vertical offset.
`IsBackground`	``	Read	Gets the is background.
`LastModifiedTime`	``	Read	Gets the last modified time.
`AlternativeTextTitle`	``	Read	Gets the alternative text title.
`AlternativeTextDescription`	``	Read	Gets the alternative text description.
`HyperlinkUrl`	``	Read	Gets the hyperlink url.
`FirstChild`	`Node	None`	Read
`LastChild`	`Node	None`	Read
`ParentNode`	`Node	None`	Read
`Document`	`Document	None`	Read

继承自 CompositeNode / Node

Signature	Description
`init(FileName: str	None, FilePath: str
`Replace(image: Image)`	Replaces the current image data with the provided Image instance
`AppendChildLast(node: TNode)` → `TNode`
`AppendChildFirst(node: TNode)` → `TNode`
`InsertChild(index: int, node: TNode)` → `TNode`
`RemoveChild(node: Node)`
`GetEnumerator()` → `Iterator[Node]`
`GetChildNodes(node_type: type[TNode])` → `list[TNode]`
`Accept(visitor: DocumentVisitor)`

Properties

Replace(image)

img.Replace(image: Image) -> None

替换此 Image 节点的内容为另一个 Image 节点，内存中。保存回 .one 不受支持。.

Accept(visitor)

img.Accept(visitor: DocumentVisitor) -> None

Properties VisitImageStart(img) 和 VisitImageEnd(img) 在访客上。.

使用示例

将所有图像保存到磁盘

from aspose.note import Document, Image

doc = Document("MyNotes.one")
for i, img in enumerate(doc.GetChildNodes(Image), start=1):
    filename = img.FileName or f"image_{i}.bin"
    with open(filename, "wb") as f:
        f.write(img.Bytes)
    print(f"Saved: {filename}  ({img.Width} x {img.Height} pts)")

从字节检测图像格式

doc = Document("MyNotes.one")
for img in doc.GetChildNodes(Image):
    b = img.Bytes
    if b[:4] == b'\x89PNG':
        fmt = "png"
    elif b[:2] == b'\xff\xd8':
        fmt = "jpeg"
    elif b[:4] == b'GIF8':
        fmt = "gif"
    else:
        fmt = "bin"
    print(f"  {img.FileName!r} detected as {fmt}")

查找所有已链接的图像

doc = Document("MyNotes.one")
for img in doc.GetChildNodes(Image):
    if img.HyperlinkUrl:
        print(f"  Linked image: {img.FileName!r} -> {img.HyperlinkUrl}")

读取替代文本

doc = Document("MyNotes.one")
for img in doc.GetChildNodes(Image):
    if img.AlternativeTextTitle or img.AlternativeTextDescription:
        print(f"  Alt title: {img.AlternativeTextTitle!r}")
        print(f"  Alt desc:  {img.AlternativeTextDescription!r}")

检查图像上的标签

doc = Document("MyNotes.one")
for img in doc.GetChildNodes(Image):
    for tag in img.Tags:
        print(f"  Image tag: Label={tag.Label!r}  CompletedTime={tag.CompletedTime}")

每页图像数

from aspose.note import Document, Page, Image

doc = Document("MyNotes.one")
for page_num, page in enumerate(doc.GetChildNodes(Page), start=1):
    images = page.GetChildNodes(Image)
    print(f"Page {page_num}: {len(images)} image(s)")

None 安全性

FileName 是 None 当未存储文件名时：写入磁盘时始终提供后备方案。.
Bytes 始终是一个 bytes 对象且永不 None.
Width 和 Height 是 None 用于没有尺寸元数据的图像。.
AlternativeTextTitle, AlternativeTextDescription,，并且 HyperlinkUrl 是 None 当未设置时。.

另见

AttachedFile: 嵌入式文件附件
NoteTag: 图像标签
Properties: Image 的祖先
图像和附件开发者指南
How-to: 遍历 DOM（KB）