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https://issues.apache.org/jira/browse/IMAGING-251?focusedWorklogId=425069&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-425069
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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
[](https://coveralls.io/builds/30175806)
Coverage increased (+0.7%) to 75.82% when pulling
**22cd21b2692ff9a1311f8f10ceb9fe29073903f3 on gwlucastrig:master** into
**1397ca92cd3268b434ad8a18529ee3544bbcf3c5 on apache:master**.
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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.
>
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