{"name": "ImageQualityToolset", "package_name": "image_quality_toolset", "description": "Computes MTF and SNR image quality metrics from satellite imagery using Knife Edge, Bridge (Pulse), and Variogram methods.", "about": "The Image Quality Toolset is a QGIS plugin developed in the context of the ESA AI4QC project. It targets remote sensing Calibration/Validation users as a supporting tool for Quality Control (QC) of satellite imagery.\n\nIt integrates into the QGIS Processing Toolbox and provides a command-line interface to perform image quality assessments from Regions of Interest (ROIs) defined on an input raster. ROIs are processed to derive Modulation Transfer Function (MTF) and Signal-to-Noise Ratio (SNR) image quality measures. Results are exported as diagnostic PNG figures and cumulative GeoPackage reports.\n\nThree methods are available:\n- MTF Knife Edge Method: estimates MTF from a sharp contrast transition between two uniform areas. Derived metrics include MTF@Nyquist, MTF30, MTF50, FWHM, RER, HEE, and R\u00b2.\n- MTF Bridge (Pulse) Method: estimates MTF from a narrow pulse target (bridge structure).\n- SNR Variogram Method: computes SNR by combining a Histogram method and a Variogram method, with per-pixel local SNR estimation.\n\nEach method requires an input raster and a polygon ROI (shapefile). Radiometric scale and offset parameters allow conversion from raw DN to radiance. Results are accumulated across runs in a GeoPackage report, one feature per analysis, with full metadata and geometry.\n\nThe plugin uses a dual-license model: the QGIS integration layer is released under GPL v3; the core signal-processing algorithms (MTF, SNR, ESF models, variogram) are released under Apache 2.0.", "homepage": "https://github.com/telespazio-tim/qgis-image-quality-toolset", "repository": "https://github.com/telespazio-tim/qgis-image-quality-toolset", "tracker": "https://github.com/telespazio-tim/qgis-image-quality-toolset/issues", "author": "Telespazio TIM", "tags": ["raster", "remote sensing", "validation", "satellite", "calibration", "mtf", "esf", "snr", "sharpness", "image quality", "knife edge", "lsf"], "downloads": 25, "latest_version": "1.0", "versions": [{"version": "1.0", "experimental": false, "qgis_min": "3.0.0", "qgis_max": "3.99.0", "downloads": 25, "uploaded_by": "rdegoul", "upload_datetime": "2026-06-25T10:49:05.967524"}]}