mantidproject/mantidimaging
Oct 2024 – Jan 2026
16 Months active
Languages Used
PythonYAMLMakefileMarkdownTOMLXMLNumPySciPy
Technical Skills
Dependency ManagementEnvironment ConfigurationFile HandlingGUI DevelopmentMockingObject-Oriented Programming
Sam Tygier
PROFILE
Sam Tygier
Sam Tygier developed and maintained advanced imaging and fitting workflows for the mantidproject/mantidimaging repository, focusing on robust ROI management, spectrum fitting, and data visualization. Over 16 months, Sam refactored core UI components using Python, PyQt, and C++, introducing modular widgets and improving error handling for NeXus and CIL formats. He enhanced reliability by optimizing backend algorithms, strengthening test coverage, and streamlining CI/CD pipelines. His work included scalable Bragg edge fitting, memory-efficient data models, and dynamic validation, all aimed at improving user experience and maintainability. The depth of engineering addressed both user-facing features and foundational code quality.
Overall Statistics
Feature vs Bugs
78%Features
Repository Contributions
232Total
Bugs
16
Commits
232
Features
57
Lines of code
8,910
Activity Months16
Your Network
102 peopleSame Organization
@stfc.ac.uk95
Work History
January 2026
14 Commits • 2 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for mantidimaging: Delivered a major refactor and UI enhancement of the fitting workflow, improved error handling for NeXus/CIL formats, and strengthened documentation and typing across the spectrum viewer. The work emphasizes business value by making the fitting process more reliable and user-friendly while improving code maintainability and developer onboarding.
14 Commits • 2 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for mantidimaging: Delivered a major refactor and UI enhancement of the fitting workflow, improved error handling for NeXus/CIL formats, and strengthened documentation and typing across the spectrum viewer. The work emphasizes business value by making the fitting process more reliable and user-friendly while improving code maintainability and developer onboarding.
January 2026
December 2025
14 Commits • 5 Features
Dec 1, 2025December 2025 delivered targeted improvements to the mantidimaging ROI/fitting workflow, stabilized dataset naming, and enhanced reconstruction UI, alongside CI/CD and test maintenance improvements. These changes improve reliability, data integrity, and user experience, while reducing build-resource usage.
December 2025
14 Commits • 5 Features
Dec 1, 2025December 2025 delivered targeted improvements to the mantidimaging ROI/fitting workflow, stabilized dataset naming, and enhanced reconstruction UI, alongside CI/CD and test maintenance improvements. These changes improve reliability, data integrity, and user experience, while reducing build-resource usage.
November 2025
9 Commits • 3 Features
Nov 1, 2025November 2025 monthly summary for mantidimaging focusing on delivering user-facing improvements, validation, and reliability enhancements.
9 Commits • 3 Features
Nov 1, 2025November 2025 monthly summary for mantidimaging focusing on delivering user-facing improvements, validation, and reliability enhancements.
November 2025
October 2025
1 Commits
Oct 1, 2025October 2025: Mantid Imaging packaging reliability improvements focused on ensuring packaged builds handle diverse image formats without runtime failures. Delivered a focused fix to include imagecodecs as a PyInstaller hidden import for mantidproject/mantidimaging, enhancing stability and distribution success.
October 2025
1 Commits
Oct 1, 2025October 2025: Mantid Imaging packaging reliability improvements focused on ensuring packaged builds handle diverse image formats without runtime failures. Delivered a focused fix to include imagecodecs as a PyInstaller hidden import for mantidproject/mantidimaging, enhancing stability and distribution success.
September 2025
6 Commits • 3 Features
Sep 1, 2025September 2025: Delivered robust ROI tooling and code quality improvements in mantidimaging, including ROIBinner-based 2D ROI binning, ROI export workflow enhancements, memory-efficient data models, and dependency stabilization to ensure reliable CI and production runs. Focused on business value by improving ROI processing accuracy, throughput, and maintainability.
6 Commits • 3 Features
Sep 1, 2025September 2025: Delivered robust ROI tooling and code quality improvements in mantidimaging, including ROIBinner-based 2D ROI binning, ROI export workflow enhancements, memory-efficient data models, and dependency stabilization to ensure reliable CI and production runs. Focused on business value by improving ROI processing accuracy, throughput, and maintainability.
September 2025
August 2025
18 Commits • 4 Features
Aug 1, 2025August 2025: Focused on reliability, correctness, and developer experience for mantidimaging. Delivered centralized, image-aware operation validation with clearer error messaging; added safeguards to the UI init to ensure previews only run after full setup; ensured summed image is recalculated in refresh when using the SUMMED mode, keeping results up-to-date. Completed broad code quality improvements including tests, typing updates, and release-note enhancements to stabilize the codebase and speed troubleshooting. These changes reduce user errors, prevent flaky previews, maintain current results, and strengthen maintainability for future releases.
August 2025
18 Commits • 4 Features
Aug 1, 2025August 2025: Focused on reliability, correctness, and developer experience for mantidimaging. Delivered centralized, image-aware operation validation with clearer error messaging; added safeguards to the UI init to ensure previews only run after full setup; ensured summed image is recalculated in refresh when using the SUMMED mode, keeping results up-to-date. Completed broad code quality improvements including tests, typing updates, and release-note enhancements to stabilize the codebase and speed troubleshooting. These changes reduce user errors, prevent flaky previews, maintain current results, and strengthen maintainability for future releases.
July 2025
11 Commits • 3 Features
Jul 1, 2025July 2025 focused on enhancing reliability, compatibility, and user experience in mantidimaging (mantidproject/mantidimaging). Delivered three core features: Spectrum Viewer improvements for robust region management and ToF handling; CIL dependency upgrade to 24.3 with data-order constants adaptation; and Welcome Screen UI cleanup with improved title bar behavior. Major fixes include handling zero-valued y-data, hiding the fitting region when no spectrum, catching Fit All errors and surfacing them in the export table, and ToF data test coverage. These changes reduce export failures, improve stability of spectral analyses, and provide a smoother onboarding experience for new users. Technologies demonstrated include Python, C++, Qt, and CIL integration; refactoring for maintainability; robust error handling and testing. Business impact: higher analyst productivity, fewer support tickets due to edge-case handling, and forward compatibility with updated dependencies.
11 Commits • 3 Features
Jul 1, 2025July 2025 focused on enhancing reliability, compatibility, and user experience in mantidimaging (mantidproject/mantidimaging). Delivered three core features: Spectrum Viewer improvements for robust region management and ToF handling; CIL dependency upgrade to 24.3 with data-order constants adaptation; and Welcome Screen UI cleanup with improved title bar behavior. Major fixes include handling zero-valued y-data, hiding the fitting region when no spectrum, catching Fit All errors and surfacing them in the export table, and ToF data test coverage. These changes reduce export failures, improve stability of spectral analyses, and provide a smoother onboarding experience for new users. Technologies demonstrated include Python, C++, Qt, and CIL integration; refactoring for maintainability; robust error handling and testing. Business impact: higher analyst productivity, fewer support tickets due to edge-case handling, and forward compatibility with updated dependencies.
July 2025
June 2025
27 Commits • 7 Features
Jun 1, 2025June 2025 performance summary for mantidimaging: delivered API and data-model refinements for fitting workflow, improved image processing robustness, optimized rendering/update pipeline, expanded test coverage, and strengthened code quality and logging. These changes increased stability, reduced unnecessary computations, and accelerated user-facing interactions with the spectrum fitting UI.
June 2025
27 Commits • 7 Features
Jun 1, 2025June 2025 performance summary for mantidimaging: delivered API and data-model refinements for fitting workflow, improved image processing robustness, optimized rendering/update pipeline, expanded test coverage, and strengthened code quality and logging. These changes increased stability, reduced unnecessary computations, and accelerated user-facing interactions with the spectrum fitting UI.
May 2025
12 Commits • 1 Features
May 1, 2025May 2025 monthly summary focused on delivering a scalable Bragg Edges Fitting System for Time-of-Flight data within mantidimaging, with an emphasis on automated fitting workflows, UI integration, and solid test coverage. The work established a robust foundation for ROI-based and batch fitting, enabling faster, more reliable Bragg edge analyses and improved user workflows.
12 Commits • 1 Features
May 1, 2025May 2025 monthly summary focused on delivering a scalable Bragg Edges Fitting System for Time-of-Flight data within mantidimaging, with an emphasis on automated fitting workflows, UI integration, and solid test coverage. The work established a robust foundation for ROI-based and batch fitting, enabling faster, more reliable Bragg edge analyses and improved user workflows.
May 2025
April 2025
13 Commits • 2 Features
Apr 1, 2025April 2025 delivered targeted enhancements to visualization and fitting workflows in mantidimaging, with a focus on reliability and user efficiency. Key items include: (i) Correlation line visualization improvements in the Recon window, including correct rotation axis positioning, proper tilt updates with set_tilt, removal of redundant update_projection drawing, API renaming (hide_cor_line/show_cor_line), and making the tilt line non-draggable; (ii) ROI-based initial-parameter workflow integrated into the fitting engine (FittingEngine, BaseFittingFunction, ErfStepFunction) with UI support (From ROI button), ROI-derived initial params, model integration, and initial-fit visualization; (iii) Release-note documented fix for incorrect updating of core and tilt tables/lines (issue #2542).
April 2025
13 Commits • 2 Features
Apr 1, 2025April 2025 delivered targeted enhancements to visualization and fitting workflows in mantidimaging, with a focus on reliability and user efficiency. Key items include: (i) Correlation line visualization improvements in the Recon window, including correct rotation axis positioning, proper tilt updates with set_tilt, removal of redundant update_projection drawing, API renaming (hide_cor_line/show_cor_line), and making the tilt line non-draggable; (ii) ROI-based initial-parameter workflow integrated into the fitting engine (FittingEngine, BaseFittingFunction, ErfStepFunction) with UI support (From ROI button), ROI-derived initial params, model integration, and initial-fit visualization; (iii) Release-note documented fix for incorrect updating of core and tilt tables/lines (issue #2542).
March 2025
11 Commits • 1 Features
Mar 1, 2025March 2025 focused on stabilizing and modernizing the ROI/UI layer in Mantid Imaging, delivering a modular ROIFormWidget-driven architecture alongside targeted performance and stability fixes for the Spectrum Viewer. The work improved UI responsiveness, reduced unnecessary redraws, and ensured consistent ROI state, delivering tangible business value through faster user interactions and easier future maintenance. Key work established a foundation for scalable ROI controls, export workflow integration, and clearer code ownership.
11 Commits • 1 Features
Mar 1, 2025March 2025 focused on stabilizing and modernizing the ROI/UI layer in Mantid Imaging, delivering a modular ROIFormWidget-driven architecture alongside targeted performance and stability fixes for the Spectrum Viewer. The work improved UI responsiveness, reduced unnecessary redraws, and ensured consistent ROI state, delivering tangible business value through faster user interactions and easier future maintenance. Key work established a foundation for scalable ROI controls, export workflow integration, and clearer code ownership.
March 2025
February 2025
39 Commits • 9 Features
Feb 1, 2025February 2025 monthly summary for mantidimaging (mantidproject/mantidimaging): Delivered cohesive ROI workflow enhancements, API cleanups, and stability improvements that reduce flaky tests and accelerate feature delivery. Focused on UI/UX for ROI management, safe data handling, and clearer, more maintainable code paths. Result: more reliable ROI operations, easier onboarding for new contributors, and stronger test resilience.
February 2025
39 Commits • 9 Features
Feb 1, 2025February 2025 monthly summary for mantidimaging (mantidproject/mantidimaging): Delivered cohesive ROI workflow enhancements, API cleanups, and stability improvements that reduce flaky tests and accelerate feature delivery. Focused on UI/UX for ROI management, safe data handling, and clearer, more maintainable code paths. Result: more reliable ROI operations, easier onboarding for new contributors, and stronger test resilience.
January 2025
15 Commits • 4 Features
Jan 1, 2025Month: 2025-01; The mantidimaging work focused on delivering user-facing improvements, performance optimizations, and strengthened development tooling. Key outcomes include a redesigned Spectrum Viewer UI with tabbed layout and new fit/export capabilities, convergence plotting improvements for clearer and faster renderings, progress reporting reductions to lower memory usage, and robust CI/Dev tooling enhancements with Ruff integration and standardized release notes. Overall these changes improve user analysis workflows, shorten iteration times for long-running tasks, and raise code quality and release discipline across the project.
15 Commits • 4 Features
Jan 1, 2025Month: 2025-01; The mantidimaging work focused on delivering user-facing improvements, performance optimizations, and strengthened development tooling. Key outcomes include a redesigned Spectrum Viewer UI with tabbed layout and new fit/export capabilities, convergence plotting improvements for clearer and faster renderings, progress reporting reductions to lower memory usage, and robust CI/Dev tooling enhancements with Ruff integration and standardized release notes. Overall these changes improve user analysis workflows, shorten iteration times for long-running tasks, and raise code quality and release discipline across the project.
January 2025
December 2024
9 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for mantidimaging focused on delivering observable business value through improved reconstruction diagnostics, more reliable progress feedback, and stronger code quality. Key outcomes include residuals monitoring in reconstruction workflow with UI visibility enhancements, improved progress accuracy via direct iteration number usage, and targeted robustness improvements to testing and runtime checks. The work supports more reproducible analyses, faster iteration cycles, and reduced maintenance costs.
December 2024
9 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for mantidimaging focused on delivering observable business value through improved reconstruction diagnostics, more reliable progress feedback, and stronger code quality. Key outcomes include residuals monitoring in reconstruction workflow with UI visibility enhancements, improved progress accuracy via direct iteration number usage, and targeted robustness improvements to testing and runtime checks. The work supports more reproducible analyses, faster iteration cycles, and reduced maintenance costs.
November 2024
26 Commits • 10 Features
Nov 1, 2024November 2024 monthly summary for mantidimaging focused on stabilizing core workflows, simplifying the codebase, and strengthening test reliability. Key architectural cleanups tightened interfaces, while dataset loading and legacy types were clarified or removed to reduce maintenance risk. Bug fixes improved user experience and data persistence, and CI/test performance was optimized to speed feedback. Release notes and performance enhancements were published for faster delivery and clearer communication with stakeholders.
26 Commits • 10 Features
Nov 1, 2024November 2024 monthly summary for mantidimaging focused on stabilizing core workflows, simplifying the codebase, and strengthening test reliability. Key architectural cleanups tightened interfaces, while dataset loading and legacy types were clarified or removed to reduce maintenance risk. Bug fixes improved user experience and data persistence, and CI/test performance was optimized to speed feedback. Release notes and performance enhancements were published for faster delivery and clearer communication with stakeholders.
November 2024
October 2024
7 Commits
Oct 1, 2024October 2024 performance summary for mantidimaging: Delivered robustness improvements in dataset loading UX, stabilized builds with explicit dependency pinning and release notes, and simplified SpectrumWidget initialization with a test-friendly refactor. These changes reduced user-facing errors, improved build reliability, and enhanced testability, supporting faster delivery and clearer release history.
October 2024
7 Commits
Oct 1, 2024October 2024 performance summary for mantidimaging: Delivered robustness improvements in dataset loading UX, stabilized builds with explicit dependency pinning and release notes, and simplified SpectrumWidget initialization with a test-friendly refactor. These changes reduced user-facing errors, improved build reliability, and enhanced testability, supporting faster delivery and clearer release history.
Activity
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Quality Metrics
Correctness91.6%
Maintainability92.4%
Architecture88.4%
Performance87.0%
AI Usage20.6%
Skills & Technologies
Programming Languages
BashMakefileMarkdownNumPyPythonRSTSciPyTOMLXMLYAML
Technical Skills
API DesignAbstract Base ClassesAlgorithm DesignAlgorithm DevelopmentAlgorithm OptimizationAlgorithm RobustnessBackend DevelopmentBug FixingC++CI/CDCallback ImplementationCallback PatternClean CodeCode ClarityCode Cleanup
Repositories Contributed To
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