ViTexOCR; a script to extract text overlays from digital video

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Metadata:

Identification_Information
Data_Quality_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Evan T. Dailey
Publication_Date: 2017
Title: ViTexOCR; a script to extract text overlays from digital video
Geospatial_Data_Presentation_Form: Python script, PDF documentation
Series_Information:

Series_Name: software release
Issue_Identification: DOI:10.5066/F7833Q56

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7833Q56
Online_Linkage:

https://www.sciencebase.gov/catalog/file/get/58dd56ace4b02ff32c685954

Description:

Abstract:

The ViTexOCR script presents a new method for extracting navigation data from videos with text overlays using optical character recognition (OCR) software. Over the past few decades, it was common for videos recorded during surveys to be overlaid with real-time geographic positioning satellite chyrons including latitude, longitude, date and time, as well as other ancillary data (such as speed, heading, or user input identifying fields). Embedding these data into videos provides them with utility and accuracy, but using the location data for other purposes, such as analysis in a geographic information system, is not possible when only available on the video display. Extracting the text data from imagery using software allows these videos to be located and analyzed in a geospatial context.
The script allows a user to select a video, specify the text data types (e.g. latitude, longitude, date, time, or other), text color, and the pixel locations of overlay text data on a sample video frame. The script’s output is a data file containing the retrieved geospatial and temporal data. All functionality is bundled in a Python script that incorporates a graphical user interface and several other software dependencies.

Purpose:

The ViTexOCR script was developed to geospatially locate videos, primarily for the purpose of including videos collected through the USGS Coastal and Marine Geology Program in the USGS Video and Photograph Portal.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2017

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: 180.0
North_Bounding_Coordinate: 90.0
South_Bounding_Coordinate: -90.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:58dd56ace4b02ff32c685954

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: computer science

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: scientific software
Theme_Keyword: software development

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Access_Constraints: none
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of this script.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Evan T. Dailey
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States

Contact_Voice_Telephone: 831-460-7591
Contact_Electronic_Mail_Address: edailey@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/58dd56ace4b02ff32c685954?name=DisplayImage.png&allowOpen=true

Browse_Graphic_File_Description:

Top: example of image from digital video with portions of text overlays outlined; Bottom: example of extracted results of navigation data from digital video displayed on a map

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment:

The python script, filename ViTexOCR.py, was developed using Python version 2.7.11 on Mac OS X version 10.10.4 and Windows 7 64-bit. The python script file is 34 kb.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

No formal attribute accuracy tests were conducted, nor are they applicable for this data.

Logical_Consistency_Report:

No formal logical accuracy tests were conducted, nor are they applicable for this data.

Completeness_Report:

Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record and accompanying documentation carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

No formal positional accuracy tests were conducted, nor are they applicable for this data.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

No formal positional accuracy tests were conducted, nor are they applicable for this data.

Lineage:

Process_Step:

Process_Description:

Python script was developed to incorporate optical character recognition software to geospatially locate videos collected by the USGS Coastal and Marine Geology Program.

Process_Date: 2017

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: Mailing and Physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

The ViTexOCR script is available in Python format. The script and associated files, including a PDF file documenting the use and installation of the script and CSGDM FGDC-compliant metadata, is contained in a single zip file.

Distribution_Liability:

This script has been approved for release by the U.S. Geological Survey (USGS). Although the script has been subjected to rigorous review, the USGS reserves the right to update the script as needed pursuant to further analysis and review. No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the script and related material nor shall the fact of release constitute any such warranty. Furthermore, the script is released on condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: PY
Format_Version_Number: Python 2.7.11
Format_Specification: Python script
Format_Information_Content:

Zip file contains the Python script, two system files containing language data, a PDF file documenting the script, two sample videos in MPEG-4 format, an optional training script written in Python, and CSGDM FGDC-compliant metadata.

File_Decompression_Technique: 7-Zip, WinZip, or Archive Utility
Transfer_Size: 9.4

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/58dd56ace4b02ff32c685954

Network_Resource_Name: https://doi.org/10.5066/F7833Q56

Access_Instructions: Data can be downloaded via the Internet

Fees: None.

Technical_Prerequisites:

The script was written to run with Python version 2.7 and requires FFmepg, ImageMagick, Tesseract OCR and several Python dependencies. See the ViTexOCR script documentation (ViTexOCR_Documentation.pdf) for full explanation of software requirements.

Metadata_Reference_Information:

Metadata_Date: 20201019
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Evan T. Dailey
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Position: Contractor
Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States

Contact_Voice_Telephone: 831-460-7591
Contact_Electronic_Mail_Address: edailey@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_F7833Q56/ViTexOCR_metadata.html>