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  • Overview
  • Administration
    • Archive Management
      • Using the plugin
      • Configuration of the plugin
    • Configuration editor
    • Copy Master-Anchor
    • Data Poller
    • Goobi-to-Goobi
      • Installation and configuration
      • Creation of the export directories
      • Transfer of the export directories
      • Importing the export directories
    • Reset pagination
    • Restoring archived image folders
    • Ruleset Compatibility
    • Ruleset editor
  • Dashboards
    • Barcode scanner Dashboard
    • Extended Dashboard
  • Exports
    • Customised export for the DMS Imagen Media Archive Management
    • Single Page Export
    • Configurable export
    • Fedora Export
    • Fedora Export PROV
    • Heris Export
    • Export for newspapers to the portal of the German Digital Library
    • PDF export to the NLI directory structure
    • Export of selected images
    • Stanford Export
    • VLM Export
    • HAAB Export
    • ZOP Export
  • Generic
    • Barcode Scanner
  • Imports
    • Legacy data import for the Austrian Federal Monuments Authority
    • Archive data import
    • Data import without catalogue query for ETH Zurich
    • Importing records from an Excel file
    • Import of card catalogues from KatZoom
    • Importing MAB Files
    • Import of Sisis SunRise Files
    • Import for journal articles from an Endnote Export
    • Data import with ALMA catalogue query for Zurich Central Library
    • Data import with CMI catalogue query for Zurich Central Library
    • Data import without catalogue query for the Zentralbibliothek Zurich
  • Metadata
    • Change Publication Type
    • Metadata extension for the creation of structural elements per image
  • OPAC
    • Ariadne Import
    • EAD data transfer
    • Generic XML Import
    • Generic JSON Import
    • Kalliope Import
    • MARC Import
    • PICA Import
    • Soutron Import
  • Repeated Jobs
    • Data import for the Austrian Housing Promotion Fund
    • HERIS Vocabulary Update
  • Statistics
    • Sudan Memory Translations
    • Visualisation of the throughput per user
  • Steps
    • ALMA API Plugin
    • Automatic pagination based on file names
    • Archiving image folders
    • Generating Archival Resource Keys (ARK)
    • Libsafe Integration
    • Assign batch
    • Batch Progress Plugin
    • Catalogue Request
    • Changing the workflow based on process properties
    • Generation of PDF files
    • Plugin for registering DOI via the DataCite API
    • Delay Workflow
    • Conditional workflow status delay
    • Delete Content
    • Display of metadata in a task
    • Plugin for DOI registration
    • Downloading and verifying files
    • Duplication of work steps
    • ePIC PID Registration (Handle & DOI)
    • EWIG Long term archiving
    • Metadata enrichment via Excel file
    • Package Export
    • Copying files from metadata fields
    • Upload files
    • File validation
    • Flex Editor
    • Generate ALTO IDs
    • Generate Identifier
    • Geonames Annotation
    • GeoNames Correction
    • Automatic Handle Assignment
    • Heris data import
    • Extraction of image metadata
    • Image scaling and watermarking
    • Selection of images
    • Quality control of images
    • Metadata transfer from a directory
    • Metadata Cleaning
    • Layout Wizzard
      • Using the plugin
        • Preview
          • Image area
          • Display and navigation options
        • Single page view
          • Folder and file options
          • Current image
          • General settings
          • File list
          • Save view
          • Working steps
          • Selected analysis step
          • Global cutting options
      • Technical details
        • Installation
        • Configuration of the LayoutWizzard
        • Configuration of the user interface
        • Workflow
    • Metadata edition
    • Capture metadata per image
    • Automatic enrichment of metadata from own vocabularies
    • Structure data import from an Excel file
    • Update Metadata Fields
    • Automatic METS enrichment with image files and pagination
    • Enrich METS file
    • Data migration from Visual Library
    • MIX Metadata Enrichment Plugin
    • OCR execution with mixed fonts
    • OCR page selection
    • Transfer OCR result to metadata field
    • Object Identifier Generation
    • Correction of tables of contents after an OLR
    • Data import for Book Interchange files
    • Split PDFs, extract full text and read table of contents
    • Electronic Publications
    • Generation of placeholder images
    • Process folder migration
    • Renaming files
    • Renaming files before the Rosetta ingest
    • Renaming Processes
    • Reorder Images
    • Replace images
    • Automatic setting of the representative
    • Reverse Image Order
    • Generation of docket files
    • Sending emails
    • Import of ECHO files as TEI
    • Tif-Validation
    • Transcription of image content
    • OCR using Transkribus
    • Import and download from Transkribus Collections
    • Creation of Uniform Resource Names (URN)
    • User Assignment
    • Vocabulary enrichment
    • Writing XMP metadata to image files
    • Metadata validation within a task
    • Invoices and delivery notes for user orders
  • Workflow
    • AEON data transfer
    • Barcode Generator
    • Close steps
    • Entity Editor - Artist Dictionary
    • Generic import plugin for excel files including validation
    • Process creation through file upload
    • Mass import from Excel data with EAD enrichment
    • Generic import plugin for JSON files
    • LayoutWizzard workflow plugin
    • Create process relationships
    • Mass upload
    • Import of newspaper issues as single pages
    • Project export as folder with images and Excel file
    • Mass import for brand studies and advertising material
    • Data transfer from AIM25
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  • Overview
  • Introduction
  • Mode of operation
  • Details on image analysis
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  1. Steps

Layout Wizzard

This is the technical documentation for the Goobi plugin LayoutWizzard for automated cropping of book page scans.

PreviousMetadata CleaningNextUsing the plugin

Last updated 8 months ago

Overview

Name
Wert

Identifier

intranda_step_layoutwizzard

Repository

Licence

Proprietary commercial

Last change

27.07.2024 13:42:51

Introduction

The LayoutWizzard is a tool for the analysis of digitized book pages and similar materials, which recognizes the position of the physical page in the digitized image and can align and crop the image accordingly.

Mode of operation

The analysis in LayoutWizzard is semi-automatic. It usually starts with an automatic step in which all images are analyzed according to fixed algorithms. The results are then checked in a manual step and corrected if necessary. Finally, in a further automatic step, cropped derivatives of the source images are generated, usually within the derivatives folder in the corresponding Goobi process.

The automatic work steps (Automatic Image Analysis and Automatic Cropping) are generally outsourced in a TaskManager plug-in so that other work within Goobi is not restricted by a high computing load on the Goobi server. However, it is also possible to run them without the TaskManager plug-in, so that these automatic steps within Goobi Step plug-ins without their own user interface are carried out directly within Goobi workflow.

Manual control of the analysis results with the suggested cropping is carried out within a standalone Goobi Step plug-in with a user interface so that its operation is fully integrated into Goobi workflow.

Depending on the individual installation of Goobi workflow and the respective workflows, the individual work steps can of course be named individually. In the following screenshot, for example, the three successive work steps have been given different names:

Details on image analysis

LayoutWizzard's image analysis works in several phases in order to arrive at the desired image derivative starting from the original image. For this purpose, each image goes through an image analysis in which the pages are aligned, the object is recognized and the book fold is determined. Accordingly, the image analysis usually consists of the following phases:

Sample
Phase

Start

The original image (master scan) is often slightly distorted and often contains a visible area of the opposite page of the book.

1. Phase: Deskew Page

In the first phase, the alignment of the page and its rotation relative to a horizontal reading direction is detected. This rotation is deducted during saving, so that the page is ideally aligned horizontally. This phase is often referred to as deskewing.

2. Phase: Crop Page

In the second phase, the recognition of the detected object takes place, usually e.g. the book. A rectangular cropping frame is calculated around the detected object, which contains the object completely with as little additional margin as possible. In order for this frame to fit as exactly as possible on a rectangular object such as a book, the page orientation (phase 1) should be applied beforehand. This phase is often referred to as trimming, because it removes the mostly dark edges of the image.

3. Phase: Detect Book Spine

In the third phase the book fold is determined. This is only necessary if the book fold is actually part of the image and should be cut along the fold to hide the part of the opposite page. This analysis phase is highly dependent on the determined orientation of the page, that is, whether it is a right or left page in the book or a double page. In the latter case, the image is divided into two single images when saved, one each to the right and left of the determined fold.

End

The LayoutWizzard's suggestion is handed over to the user for review after all analysis phases have been completed, where it is adapted if necessary.

https://github.com/intranda/goobi-plugin-step-layoutwizzard
How the LayoutWizzard works within Goobi workflow
Individual naming of the individual work steps that belong to the LayoutWizzard
Analysis phases of the LayoutWizzard