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ASF GitHub Bot logged work on IMAGING-251: ------------------------------------------ Author: ASF GitHub Bot Created on: 19/Apr/20 13:25 Start Date: 19/Apr/20 13:25 Worklog Time Spent: 10m Work Description: coveralls commented on issue #72: IMAGING-251 support for TIFF floating-point formats URL: https://github.com/apache/commons-imaging/pull/72#issuecomment-610094475 [![Coverage Status](https://coveralls.io/builds/30175806/badge)](https://coveralls.io/builds/30175806) Coverage increased (+0.7%) to 75.82% when pulling **22cd21b2692ff9a1311f8f10ceb9fe29073903f3 on gwlucastrig:master** into **1397ca92cd3268b434ad8a18529ee3544bbcf3c5 on apache:master**. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 425069) Time Spent: 6.5h (was: 6h 20m) > Support TIFF standard floating point data > ----------------------------------------- > > Key: IMAGING-251 > URL: https://issues.apache.org/jira/browse/IMAGING-251 > Project: Commons Imaging > Issue Type: New Feature > Components: Format: TIFF > Affects Versions: 1.x > Reporter: Gary Lucas > Priority: Major > Fix For: 1.x > > Attachments: Imaging252_USGS_n38w077.jpg > > Time Spent: 6.5h > Remaining Estimate: 0h > > Commons Imaging does not support the floating-point format included in the > TIFF specification. There are prominent data sources that issue products in > this format. The ability to support this information would open up new > application areas for Commons Imaging. > TIFF is often used as a mechanism for distributing data from geophysical > applications in the form of GeoTIFF files. Some of this is not imagery, but > data. For example, the US Geological Survey is currently releasing > high-resolution elevation data grids for the 3DEP program under the name > Cloud-Optimized GeoTIFF (COG). It is a substantial data set with significant > potential commercial and academic applications. > To access this data means modifying the TIFF DataReaderStrips and > DataReaderTile classes to recognize floating point data (which is typically > indicated using TIFF tag #339, SampleFormat). Also, returning the data in the > form of a BufferedImage makes no sense at all, so the API on the > TiffImageParser and supporting classes would need additional methods to > return arrays of floats. The good news here is that that requirement would > mean adding new methods to the classes rather than making significant changes > to existing classes. So the probability of unintended consequences or new > bugs in existing code would be minimized. > Specification details for floating-point are given in the main TIFF-6 > documentations and Adobe Photoshop TIFF Technical Note 3. > > I am willing to volunteer to make these changes provided that there is > interest and a high probability that my contributions would be evaluated and, > if suitable, integrated into the Commons Imaging code base. > Thank you for your attention in this matter. > -- This message was sent by Atlassian Jira (v8.3.4#803005)