Metadata View¶
All information and properties related to the images or files stored by digiKam are referred to as metadata. Metadata fields include file properties such as file size and creation date, the camera settings when the image was taken, author info, copyrights, keywords, captions, and the coordinates of the location where the image was taken.
The metadata sidebar is composed of five sub tabs Exif, Makernote, IPTC, XMP, and ExifTool. While the metadata sidebar is primarily designed to display information, digiKam has multiple tools for setting and editing metadata:
A Área de Meta-Dados na Barra Lateral Direita a Mostrar Informações do EXIF¶
For each section of the metadata sidebar, a bar is available on the top of the view containing:
A left button
that pops up a menu to filter the metadata list to only display some metadata fields:No Filter: displays all metadata fields.
Photograph: displays only the most important metadata fields for photographs.
Custom: displays a customized selection of metadata fields.
Settings: selects the specific metadata fields to display in a custom display.
A live search box in the middle of the bar. As you type in a keyword, the metadata list will be successively filtered. This is a quick way of accessing specific information.
A right button
that pops up a menu to export contents:Copy to clipboard: copies the metadata text to the clipboard, so it can be pasted into another application.
Save to file: saves the metadata text to a data file.
Print data: exports the metadata text to a printer or PDF file.
Nota
The metadata view preserves the filter settings while the file selection is changed. This allows you to quickly identify differences in the metadata contents of various items by stepping through files.
Marcas de Notas do Fabricante¶
The Exif standard defines a Makernote tag, which allows camera manufacturers to store custom metadata fields in the file. This is used by many camera manufacturers to store a myriad of camera settings not listed in the Exif standard, such as shooting modes, post-processing settings, serial number, focusing modes, etc. But the specifications of these custom fields is often proprietary and manufacturer specific.
You can review manufacturer-specific metadata for the selected image in the Makernote sidebar tab. The Makernote Viewer is purely informational – it cannot be used to change any of the Makernote data.
The Metadata View from the Right Sidebar Displaying Markernote Information¶
Marcas de IPTC¶
O International Press Telecommunications Council, é um consórcio das agências noticiosas e fabricantes de notícias mais importantes. Ele desenvolve e mantém normas técnicas para um intercâmbio de notícias melhorado, o qual é usado por praticamente todas as organizações de notícias mais importantes no mundo.
O IPTC estabeleceu-se em 1965 com um grupo de organizações noticiosas para salvaguardar os interesses de telecomunicações da imprensa mundial. Desde o fim dos anos 70, as actividades do IPTC focaram-se principalmente no desenvolvimento e publicação de normas industriais para o intercâmbio de dados noticiosos.
Em particular, o IPTC definiu um conjunto de atributos de meta-dados que poderão ser aplicados às imagens. Estes foram definidos originalmente em 1979, e foram bastante revistos em 1991 para serem o Modelo de Intercâmbio de Informação (IIM), se bem que o conceito avançou realmente em 1994, quando a Adobe definiu uma especificação para incorporar de facto os meta-dados nos ficheiros de imagens digitais - conhecidos como cabeçalhos de IPTC.
You can review embedded IPTC information for the selected image in the IPTC sidebar tab. The IPTC Viewer is purely informational – it cannot be used to change any of the IPTC data.
The Metadata View from the Right Sidebar Displaying IPTC Information¶
Marcas de XMP¶
A Extensible Metadata Platform (XMP) é uma norma ISO, criada originalmente pela Adobe Systems Inc. para a criação, processamento e intercâmbio de meta-dados padronizados e personalizados para os documentos digitais e conjuntos de dados.
XMP standardizes a data model, a serialization format and core properties for the definition and processing of extensible metadata. It also provides guidelines for embedding XMP information into popular image, video and document file formats, without breaking the ability of applications that do not support XMP to read the files.
Although metadata can alternatively be stored in a sidecar file, embedding metadata avoids problems that occur when the metadata is stored separately and separated from the original image file.
XMP offers an enriched alternative method of storing IPTC fields.
You can review embedded XMP information for the selected image in the XMP sidebar tab. The XMP Viewer is purely informational – it cannot be used to change any of the XMP data.
The Metadata View from the Right Sidebar Displaying XMP Information¶
Área da ExifTool¶
ExifTool is a free and open-source program for reading, writing, and manipulating image, audio, video, and PDF metadata. It is a platform independent, command-line Perl application. Prior versions of digiKam used the Exiv2 library to read and write metadata, but digiKam can now use the ExifTool as an alternative that supports a wider variety of file types and metadata fields than Exiv2.
ExifTool supports many types of metadata including Exif, IPTC, XMP, JFIF, GeoTIFF, ICC Profile, Photoshop IRB, FlashPix, AFCP and ID3, as well as the manufacturer-specific metadata formats for many digital cameras.
You can review information decoded by ExifTool for the selected image in the ExifTool sidebar tab. The ExifTool Viewer is purely informational – it cannot be used to change any of the file’s metadata.
The Metadata View from the Right Sidebar Displaying ExifTool Information¶