Generated scientific reader contract

Scientific format and benchmark reference.

This page is generated from capabilities/manifest.json, the current package metrics, and the indexed scientific benchmark artifacts. It distinguishes package support from the smaller set in the live explorer.

33 readers6 format familiesNative precisionDirect-range evidence

Coverage scope

The reader surface includes common raster and whole-slide data; DM3 and DM4; TIA SER and EMI; NCEM and Velox EMD; 4D-STEM detector data; AFM, SPM, and surface metrology; NIfTI, NRRD, MRC, and MetaImage volumes; OME-TIFF and Aperio SVS; spectroscopy and detector interchange; and raw NumPy arrays. “Direct range” means the reader can request selected source spans through the scientific source abstraction; it does not promise that every operation avoids all metadata or companion-resource reads.

The OME-Zarr WSI viewer is the measured browser proof for remote, sharded OME-NGFF pyramids; the general scientific explorer remains local-file focused.

Live explorer boundary. The browser explorer currently wires only its five generated demo reader IDs. Package readers below require explicit application registration unless and until their UI integration lands.

Common raster and whole-slide

9 explicit reader exports.

PNG

purejsimage/png

Range reads: No
single
image
baseline only

Extensions: .png
Dataset kinds: image
Direct-range support: No
Native precision: Canonical uint8 adapter (uint8)
Package import: purejsimage/scientific/readers/png

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Low-confidence codec adapter exposing canonical uint8 image datasets.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: Image codec adapter exposes a uint8 plane.

JPEG

purejsimage/jpeg

Range reads: No
single
image
baseline only

Extensions: .jpg, .jpeg, .jpe
Dataset kinds: image
Direct-range support: No
Native precision: Canonical uint8 adapter (uint8)
Package import: purejsimage/scientific/readers/jpeg

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Low-confidence codec adapter exposing canonical uint8 image datasets.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: Image codec adapter exposes a uint8 plane.

WebP

purejsimage/webp

Range reads: No
single
image
baseline only

Extensions: .webp
Dataset kinds: image
Direct-range support: No
Native precision: Canonical uint8 adapter (uint8)
Package import: purejsimage/scientific/readers/webp

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Low-confidence codec adapter exposing canonical uint8 image datasets; animated WebP remains outside the codec boundary.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: Image codec adapter exposes a uint8 plane.

BMP

purejsimage/bmp

Range reads: No
single
image
baseline only

Extensions: .bmp, .dib
Dataset kinds: image
Direct-range support: No
Native precision: Canonical uint8 adapter (uint8)
Package import: purejsimage/scientific/readers/bmp

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Low-confidence codec adapter exposing canonical uint8 image datasets.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: Image codec adapter exposes a uint8 plane.

JPEG 2000 / JP2

purejsimage/jp2

Range reads: No
single
image
baseline only

Extensions: .jp2
Dataset kinds: image
Direct-range support: No
Native precision: Canonical uint8 adapter (uint8)
Package import: purejsimage/scientific/readers/jp2

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Low-confidence codec adapter exposing canonical uint8 image datasets within the first-party JP2 decoder subset.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: Image codec adapter exposes a uint8 plane after canonical decode.

TIFF

purejsimage/tiff

Range reads: Yes
single
image
volume
pyramid
range tested

Extensions: .tif, .tiff
Dataset kinds: image, volume, pyramid
Direct-range support: Yes
Native precision: Native numeric samples (metadata-only, uint8)
Package import: purejsimage/scientific/readers/tiff

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Native-precision compatible page series, separate incompatible series, and SubIFD or chained reduced-resolution levels with typed GeoTIFF CRS, affine, inverse, bounds, pixel interpretation, nodata, and JSON-safe source metadata; deterministic tiled Classic TIFF, BigTIFF, Deflate, LZW, PackBits, RGB/RGBA, three-band YCbCr JPEG, four-band photometric-RGB ExtraSamples=0 JPEG, and overview COG fixtures prove the applicable native-raster paths. JPEG compression 7 native samples are YCbCr-converted RGB, preserved RGB+unspecified extra components, or grayscale; four-band sources are not routed through the RGB display decoder. Old-style JPEG remains display-only. Pixel reads remain in raster coordinates without invented axis semantics.
Benchmark coverage: 3 baseline supported; 4/4 range rows supported
Reference / oracle: First TIFF dataset exposes x/y axes and a readable region.

OME-TIFF

purejsimage/ome-tiff

Range reads: Yes
single
image
volume
range tested

Extensions: .tif, .tiff
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (uint8)
Package import: purejsimage/scientific/readers/ome-tiff

Resource model, support boundary, and evidence

Resource model: single
Support boundary: OME-XML-backed X/Y/Z/C/T datasets on supported TIFF sample and compression layouts; detection follows the first TIFF IFD and bounded tag-270 ranges instead of scanning a fixed file prefix.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: OME metadata selects the OME reader and exposes x/y/z/channel/time axes.

OME-Zarr

purejsimage/ome-zarr

Range reads: Yes
directory like
image
volume
pyramid
baseline only

Extensions: .zarr, .ozx
Dataset kinds: image, volume, pyramid
Direct-range support: Yes
Native precision: Native numeric samples
Package import: purejsimage/scientific/readers/ome-zarr

Resource model, support boundary, and evidence

Resource model: directory like
Support boundary: OME-NGFF 0.4 and 0.5 image multiscales, required 0.5 OMERO channel windows/colors and plate layout/version metadata, image-label colors/properties/source with 0.5 associated-pyramid parity, path-backed scale/translation, preserved pyramid-generation metadata, and rich plates/wells/acquisitions on Zarr v2 and v3 directory stores, range-first bounded public HTTP contexts with v2/v3 root discovery, or a ZIP archive with root-level or a single nested zarr.json/.zgroup (including *.zarr / *.ome.zarr names and ignored __MACOSX/ sidecars), plus explicit OME.series and consecutive bioformats2raw.layout fallback roots. Integer arrays include exact signed/unsigned 64-bit canonical bytes and BigInt access. Regular and sharding_indexed chunk grids; bytes, gzip, zlib, zstd, crc32c, transpose, shuffle, and Blosc 1 with byte shuffle or 8-element-aligned bitshuffle and LZ4/zlib/zstd or memcpy; missing chunks become fill values; selected planes fetch only intersecting chunks. BloscLZ, Snappy, malformed bitshuffle blocks, complex/boolean/structured dtypes, tables, storage_transformers, non-regular chunk grids, RFC-9 zip-comment/jsonFirst requirements, multi-root ZIPs, and writers are rejected.
Benchmark coverage: 0 baseline supported; no range profile row
Reference / oracle: Manifest and fixture assertions only

Aperio SVS

purejsimage/aperio-svs

Range reads: Yes
single
pyramid
image
range tested

Extensions: .svs
Dataset kinds: pyramid, image
Direct-range support: Yes
Native precision: Native numeric samples (uint8)
Package import: purejsimage/scientific/readers/aperio-svs

Resource model, support boundary, and evidence

Resource model: single
Support boundary: One bounded calibrated whole-slide pyramid plus separate supported associated images.
Benchmark coverage: 2 baseline supported; 4/4 range rows supported
Reference / oracle: Pyramid dataset exposes a bounded readable region without full-source materialization.

Electron microscopy

7 explicit reader exports.

Gatan DigitalMicrograph

purejsimage/digital-micrograph

Range reads: Yes
single
image
volume
spectrum image
range tested

Extensions: .dm3, .dm4
Dataset kinds: image, volume, spectrum image
Direct-range support: Yes
Native precision: Native numeric samples (uint16, uint8)
Package import: purejsimage/scientific/readers/digital-micrograph

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Rank-2 images, rank-3 X/Y/Z volumes, evidence-gated X/Y/energy EELS spectrum images, evidence-gated C-ordered 4D-STEM diffraction planes, and otherwise neutral rank-4 axes, plus fixture-proven little-endian packed BGRA; no rank-1, complex, encrypted, external, big-endian packed color, or undocumented packed content.
Benchmark coverage: 2 baseline supported; 8/8 range rows supported
Reference / oracle: First supported image dataset exposes a readable 2D plane. When the fixture is 4D STEM, kx/ky is readable with fixed scan axes.

FEI/Thermo TIA SER

purejsimage/tia-ser

Range reads: Yes
single
image
volume
spectrum image
spectrum
range tested

Extensions: .ser
Dataset kinds: image, volume, spectrum image, spectrum
Direct-range support: Yes
Native precision: Native numeric samples (float32, int32)
Package import: purejsimage/scientific/readers/tia-ser

Resource model, support boundary, and evidence

Resource model: single
Support boundary: TIA SER versions 0x0210 and 0x0220 with scalar element types 1 through 8, request-bounded batched metadata indexing, lazy payload reads, compatible image or spectrum collections, native calibrated series reads, and explicit valid or invalid element metadata; no complex elements or companion EMI metadata.
Benchmark coverage: 2 baseline supported; 8/8 range rows supported
Reference / oracle: Image dataset exposes x/y with one fixed element index. Spectra dataset exposes x/y/energy and a bounded energy series.

FEI/Thermo TIA EMI

purejsimage/tia-emi

Range reads: Yes
companion set
image
volume
spectrum image
spectrum
range tested

Extensions: .emi
Dataset kinds: image, volume, spectrum image, spectrum
Direct-range support: Yes
Native precision: Native numeric samples (float32)
Package import: purejsimage/scientific/readers/tia-emi

Resource model, support boundary, and evidence

Resource model: companion set
Support boundary: Bounded ObjectInfo XML from the TIA EMI binary envelope plus consecutively numbered sibling SER resources resolved through ScientificCompanionResolver; EMI acquisition metadata enriches SER-backed datasets, strongly corroborated diffraction calibration is interpreted as reciprocal space, contradictory mode hints preserve SER facts, and every dataset identity includes its EMI and contributing SER resource.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: At least one ser-* dataset opens and retains EMI metadata/calibration evidence.

NCEM EMD 0.2

purejsimage/ncem-emd

Range reads: Yes
single
image
volume
spectrum image
spectrum
range tested

Extensions: .emd
Dataset kinds: image, volume, spectrum image, spectrum
Direct-range support: Yes
Native precision: Native numeric samples (int32)
Package import: purejsimage/scientific/readers/ncem-emd

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Berkeley/openNCEM EMD 0.2 numeric groups below /data or /signals with scalar integer or decimal-string version attributes, exact labeled coordinates, bounded scalar or array acquisition attributes, and selected HDF5 hyperslab reads; Direct Electron .de5 and later EMD revisions remain unsupported.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: First image dataset exposes a readable plane or series according to rank.

FEI/Thermo Velox EMD

purejsimage/velox-emd

Range reads: Yes
single
image
volume
range tested

Extensions: .emd
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (float32, int16)
Package import: purejsimage/scientific/readers/velox-emd

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Velox HDF5 image hierarchy with rank-3 numeric image, diffraction, dense-map, DPC complex, or positive-half FFT arrays; bounded per-frame JSON metadata, explicit detector datasets and frame axes, exact native samples, and specific pruned-spectrum-image errors. Sparse SpectrumStream data and dense Spectrum entries remain outside this E2 boundary.
Benchmark coverage: 2 baseline supported; 8/8 range rows supported
Reference / oracle: First image dataset exposes a readable plane. Complex dataset preserves two output components and a readable plane.

NanoMegas ASTAR blockfile

purejsimage/blockfile

Range reads: Yes
single
image
spectrum image
range tested

Extensions: .blo
Dataset kinds: image, spectrum image
Direct-range support: Yes
Native precision: Native numeric samples (uint8)
Package import: purejsimage/scientific/readers/blockfile

Resource model, support boundary, and evidence

Resource model: single
Support boundary: NanoMegas ASTAR blockfiles with bounded square uint8 diffraction frames, per-frame ID validation, a virtual-bright-field navigator, scan calibration, diffraction scale, and acquisition metadata.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: A fixed navigation position exposes a readable diffraction plane.

Quantum Detectors Merlin MIB

purejsimage/mib

Range reads: Yes
companion pair
image
spectrum image
range tested

Extensions: .mib
Dataset kinds: image, spectrum image
Direct-range support: Yes
Native precision: Native numeric samples (uint8)
Package import: purejsimage/scientific/readers/mib

Resource model, support boundary, and evidence

Resource model: companion pair
Support boundary: Processed Merlin U08, U16, or U32 frame sequences with 384- or 768-byte per-frame headers, vertical normalization, optional acquisition HDR metadata, and optional rectangular scan navigation; raw packed R64 detector words are explicitly rejected.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: MIB frame dataset exposes a readable diffraction plane.

AFM, SPM, and surface metrology

5 explicit reader exports.

Gwyddion Simple Field

purejsimage/gsf

Range reads: Yes
single
surface
baseline only

Extensions: .gsf
Dataset kinds: surface
Direct-range support: Yes
Native precision: Native numeric samples (float32)
Package import: purejsimage/scientific/readers/gsf

Resource model, support boundary, and evidence

Resource model: single
Support boundary: One scalar 2D field with exact X/Y calibration and bounded metadata.
Benchmark coverage: 2 baseline supported; no range profile row
Reference / oracle: Descriptor and first selected surface samples must be finite float64 values.

Nanonis SXM

purejsimage/nanonis-sxm

Range reads: Yes
single
surface
range tested

Extensions: .sxm
Dataset kinds: surface
Direct-range support: Yes
Native precision: Native numeric samples (float32)
Package import: purejsimage/scientific/readers/nanonis-sxm

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Nanonis SXM v2 FLOAT MSBFIRST images; every recorded channel and direction is separate, binary values retain declared channel units, and Y remains in top-to-bottom file order with a negative calibrated step.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: First dataset exposes calibrated x/y axes and a readable bounded plane.

Igor Binary Wave v5

purejsimage/igor-binary-wave

Range reads: Yes
single
image
volume
range tested

Extensions: .ibw
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (float32)
Package import: purejsimage/scientific/readers/igor-binary-wave

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Numeric IBW v5 waves with two through four contiguous dimensions, endian and checksum validation, linear axes, units, notes, labels, and selected XY regions; complex, text, formula-dependent, and private-option waves are rejected.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: First dataset exposes at least two axes and a readable plane.

Digital Surf SUR/PRO

purejsimage/digital-surf

Range reads: No
single
surface
baseline only

Extensions: .sur, .pro
Dataset kinds: surface
Direct-range support: No
Native precision: Native numeric samples (float64)
Package import: purejsimage/scientific/readers/digital-surf

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Digital Surf integer surface, multilayer, and profile records with bounded stored or zlib-stream payloads, exact scale/offset conversion, special-point masks, physical axes, units, object enumeration, comments, and private-zone bounds; spectral maps are rejected.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: First surface descriptor is calibrated and a bounded plane is readable.

X3P surface exchange

purejsimage/x3p

Range reads: Yes
single
surface
range tested

Extensions: .x3p
Dataset kinds: surface
Direct-range support: Yes
Native precision: Native numeric samples (float64)
Package import: purejsimage/scientific/readers/x3p

Resource model, support boundary, and evidence

Resource model: single
Support boundary: ISO 5436-2 SUR matrices with incremental X/Y axes, one Z layer, numeric binary point data, optional validity masks, exact Z increment/offset conversion, bounded ZIP/ZIP64 indexing, and stored-member range views.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: First dataset exposes a 4x4 calibrated plane.

Medical and volume interchange

5 explicit reader exports.

MRC/CCP4

purejsimage/mrc

Range reads: Yes
single
image
volume
range tested

Extensions: .mrc, .map, .ccp4
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (int16)
Package import: purejsimage/scientific/readers/mrc

Resource model, support boundary, and evidence

Resource model: single
Support boundary: One scalar image or volume for the documented MRC/CCP4 modes and axis mappings.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: 2x2 int16 plane values are finite and metadata includes cell dimensions.

NRRD

purejsimage/nrrd

Range reads: No
companion pair
image
volume
baseline only

Extensions: .nrrd, .nhdr
Dataset kinds: image, volume
Direct-range support: No
Native precision: Native numeric samples (uint8)
Package import: purejsimage/scientific/readers/nrrd

Resource model, support boundary, and evidence

Resource model: companion pair
Support boundary: NRRD0001 through NRRD0005 scalar numeric arrays with attached or one-file detached raw data, bounded gzip data, endian conversion, linear spacing or direction-vector calibration, origin, units, labels, kinds, and key/value metadata; ASCII, bzip2, and multi-file sequences are rejected.
Benchmark coverage: 2 baseline supported; no range profile row
Reference / oracle: 2x2 raw NRRD plane is readable. 2x2 gzip NRRD plane is readable.

MetaImage MHD/MHA

purejsimage/meta-image

Range reads: Yes
companion pair
image
volume
range tested

Extensions: .mhd, .mha
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (uint16, uint8)
Package import: purejsimage/scientific/readers/meta-image

Resource model, support boundary, and evidence

Resource model: companion pair
Support boundary: Binary numeric MHA LOCAL or MHD plus one raw companion, with scalar or bounded interleaved components, endian conversion, spacing, origin, and preserved direction; compressed, ASCII, HeaderSize -1, and multi-file series are rejected.
Benchmark coverage: 2 baseline supported; 8/8 range rows supported
Reference / oracle: 2x2 local MetaImage plane is readable. Detached 2x1 uint16 plane resolves the RAW companion and is readable.

NIfTI-1/2

purejsimage/nifti

Range reads: No
single
image
volume
baseline only

Extensions: .nii, .gz
Dataset kinds: image, volume
Direct-range support: No
Native precision: Native numeric samples (float64)
Package import: purejsimage/scientific/readers/nifti

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Single-file NIfTI-1 and NIfTI-2 scalar numeric arrays, optionally bounded whole-file gzip, with endian conversion, scl_slope/inter transformation, voxel spacing and units, and preserved qform/sform metadata; paired hdr/img and complex, RGB, binary, and extension payloads are outside this subset.
Benchmark coverage: 2 baseline supported; no range profile row
Reference / oracle: Scaled output is readable and spatial calibration is retained. Gzip source opens and returns the same selected plane semantics.

DICOM Part 10 Image

purejsimage/dicom

Range reads: Yes
single
image
volume
baseline only

Extensions: .dcm, .dicom
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples
Package import: purejsimage/scientific/readers/dicom

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Local DICOM Part 10 image instances using Implicit or Explicit VR Little Endian native uncompressed MONOCHROME1/2 pixels, Encapsulated Uncompressed Explicit VR Little Endian, RLE Lossless, JPEG Baseline 8-bit, JPEG Lossless Process 14 Selection Value 1, JPEG 2000 Lossless, and JPEG 2000, with 8-bit or 16-bit allocation as the transfer syntax permits, signed or unsigned stored values, 12-bit-in-16 normalization, homogeneous multi-frame selection, Pixel Spacing, linear rescale slope/intercept metadata, and Window Center/Width presets. Stored samples are not rescaled, windowed, or inverted. Selected encapsulated frames read only their offset table and fragments. Encapsulated Uncompressed and RLE require one fragment per frame. JPEG families may split a frame across fragments only with a valid Basic Offset Table. Empty offset tables with ambiguous multi-fragment frame boundaries remain unsupported; the reader does not scan for JPEG EOI markers to guess frames. Color, LUT-based presentation, DICOMweb, series discovery, private-tag interpretation, JPEG Lossless Process 14 other selection values, JPEG-LS, HTJ2K, and other compressed transfer syntaxes remain unsupported. Not validated for diagnostic use.
Benchmark coverage: 0 baseline supported; no range profile row
Reference / oracle: Manifest and fixture assertions only

Spectroscopy and detector interchange

6 explicit reader exports.

ENVI

purejsimage/envi

Range reads: Yes
companion pair
image
volume
spectrum image
range tested

Extensions: .hdr, .img, .dat, .raw
Dataset kinds: image, volume, spectrum image
Direct-range support: Yes
Native precision: Native numeric samples (uint16)
Package import: purejsimage/scientific/readers/envi

Resource model, support boundary, and evidence

Resource model: companion pair
Support boundary: Header-plus-binary scalar cubes with BSQ, BIL, or BIP layout and exact selected-region reads.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: Header and binary resolve as one dataset with a readable band plane.

FITS

purejsimage/fits

Range reads: Yes
single
image
volume
range tested

Extensions: .fits, .fit, .fts
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (float64)
Package import: purejsimage/scientific/readers/fits

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Supported image HDUs with ranked axes, native numeric samples, and linear physical coordinates.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: Primary image dataset exposes x/y axes and a readable plane.

CBF/imgCIF

purejsimage/cbf

Range reads: No
single
image
baseline only

Extensions: .cbf
Dataset kinds: image
Direct-range support: No
Native precision: Native numeric samples (int32)
Package import: purejsimage/scientific/readers/cbf

Resource model, support boundary, and evidence

Resource model: single
Support boundary: One 2D detector image using the documented byte-offset encoding subset.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: 2x2 detector plane decodes to four finite samples.

Lispix RPL/RAW

purejsimage/rpl

Range reads: Yes
companion pair
image
spectrum image
range tested

Extensions: .rpl, .raw
Dataset kinds: image, spectrum image
Direct-range support: Yes
Native precision: Native numeric samples (uint8)
Package import: purejsimage/scientific/readers/rpl

Resource model, support boundary, and evidence

Resource model: companion pair
Support boundary: One numeric header-plus-RAW array in image, vector, or depth-one order with exact declared endian, offset, dimensions, axis calibration, and selected plane or series reads.
Benchmark coverage: 1 baseline supported; 4/4 range rows supported
Reference / oracle: Depth-fixed x/y plane is readable and the companion is resolved.

EMSA/MAS spectrum

purejsimage/emsa

Range reads: No
single
spectrum
baseline only

Extensions: .msa, .emsa
Dataset kinds: spectrum
Direct-range support: No
Native precision: Native numeric samples (float64)
Package import: purejsimage/scientific/readers/emsa

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Bounded EMSA/MAS text spectra using Y or XY data, with exact point counts, native float64 series values, calibrated or lookup spectral coordinates, units, and preserved header fields.
Benchmark coverage: 1 baseline supported; no range profile row
Reference / oracle: Spectral axis calibration is present and a bounded series is readable.

ANG/CTF orientation map

purejsimage/ebsd-text

Range reads: No
single
orientation map
baseline only

Extensions: .ang, .ctf
Dataset kinds: orientation map
Direct-range support: No
Native precision: Native numeric samples (float64)
Package import: purejsimage/scientific/readers/ebsd-text

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Bounded UTF-8 ANG square-grid and CTF rectangular orientation maps with validated row-major positions, physical scan axes, Euler angles, phase, and quality columns; staggered and hexagonal grids are rejected instead of silently reshaped.
Benchmark coverage: 2 baseline supported; no range profile row
Reference / oracle: ANG map exposes a readable x/y plane. CTF map exposes a readable x/y plane.

Raw numeric interchange

1 explicit reader export.

NumPy NPY

purejsimage/npy

Range reads: Yes
single
image
volume
range tested

Extensions: .npy
Dataset kinds: image, volume
Direct-range support: Yes
Native precision: Native numeric samples (uint16)
Package import: purejsimage/scientific/readers/npy

Resource model, support boundary, and evidence

Resource model: single
Support boundary: Exactly one NPY v1, v2, or v3 C- or Fortran-contiguous scalar boolean, integer, float16, float32, or float64 array with generic index axes and selected plane or series reads; scalar, structured, object, complex, datetime, Unicode, and NPZ arrays are rejected.
Benchmark coverage: 2 baseline supported; 8/8 range rows supported
Reference / oracle: C-order axes are preserved and a plane is readable. Fortran-order axes are preserved and a plane is readable.

Methods and artifacts

Baseline rows validate descriptor identity, selected shapes, native sample type, calibration assertions, sample hashes, and output bytes before admitting timing. Range rows additionally record request count, returned and unique source bytes, overfetch, and resource completeness.

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