Details
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Type:
Sub-task
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Status:
Open
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Priority:
Major
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Resolution: Unresolved
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Affects Version/s: 3.07, 3.08, 3.09, 3.10, 3.11, 3.12
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Fix Version/s: None
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Component/s: Coverage
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Labels:
Description
The RAW ImageReader provided in the Image I/O extension for JAI version 1.1 is slow and seems to have bug when reading images with a subsampling different than 1. A custom RAWImageReader has been provided in Geotk 3.07 for different raisons (extensibility, managing NaN values). It provides better performance and does not suffer from the bugs. However it was targeted at one-banded images only. Reading RGB images was out of scope.
However the above-cited bugs are problematic for the generation of a mosaic of tiles, since the mosaic generator caches many images in the RAW format during its operation. In the current situation, it is unable to read back the images cached in the RAW format. We could use an other format like TIFF, but the RAW format has the advantage to garantee that the color model is not transformed.
We should continue the development of the Geotk RawImageReader in order to read images with more than one band, especially RGB images. We could then use it in replacement of the Sun raw image reader in every cases, at least until the bugs are fixed.