Register plugin 32033 - #282
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August 7, 2026 23:49
t20100
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Thanks to have registered the filter!
Here are some suggestions and updates for the description of the filter.
Co-authored-by: Thomas VINCENT <thomas.vincent@esrf.fr>
Co-authored-by: Thomas VINCENT <thomas.vincent@esrf.fr>
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Thanks @t20100. I accepted your suggestions. |
t20100
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| #### Plugin ID `32033` <a name="htj2k"></a> | ||
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| [High Throughput JPEG 2000 (HTJ2K)](https://jpeg.org/jpeg2000/htj2k.html) is an addition to the JPEG 2000 family of International Standards developed by JPEG Committee (ISO/IEC JTC 1/SC 29/WG 1). | ||
| HTJ2K brings an order of magnitude increase in throughput to JPEG 2000 at the expense of slightly reduced coding efficiency. | ||
| Plugin features: | ||
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| * Bare high-throughput JPEG2000 codestream. | ||
| * Lossless compression only. For lossy compression use an HTJ2K library and write the chunk directly with `H5Dwrite_chunk`. | ||
| * Limited support of datatypes to ensure different HTJ2K libraries can read the chunks: `int8`, `uint8`, `int16`, `uint16`. | ||
| * Chunk shapes with at most 3 non-unity dimensions. | ||
| * Limited JPEG2000 "components": For chunks with 3 non-unity dimensions, the last non-unity dimension must be 3. | ||
| * Not limited to a particular HTJ2K implementation. | ||
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| Plugin's `cd_values[]` are described at https://github.com/silx-kit/h5z-htj2k#filter-cd_values. | ||
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| Repository: https://github.com/silx-kit/h5z-htj2k. | ||
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| ##### Contact | ||
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| https://github.com/silx-kit/h5z-htj2k | ||
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I just realized this is added before filter ID 32032 while all the other filters are ordered by ID: maybe best to move the htj2k description after BitRound to avoid adding ID 32033 for the next new filter.
| * Lossless compression only. For lossy compression use an HTJ2K library and write the chunk directly with `H5Dwrite_chunk`. | ||
| * Limited support of datatypes to ensure different HTJ2K libraries can read the chunks: `int8`, `uint8`, `int16`, `uint16`. | ||
| * Chunk shapes with at most 3 non-unity dimensions. | ||
| * Limited JPEG2000 "components": For chunks with 3 non-unity dimensions, the last non-unity dimension must be 3. |
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Suggested change
| * Limited JPEG2000 "components": For chunks with 3 non-unity dimensions, the last non-unity dimension must be 3. | |
| * Limited JPEG2000 "components" support: For chunks with 3 non-unity dimensions, the last non-unity dimension must be 3. |
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Register plugin ID 32033 for HTJ2K compression.