1 line
30 KiB
HTML
1 line
30 KiB
HTML
<!DOCTYPE html> <html lang=en data-content_root="./"> <meta charset=utf-8 /> <meta name=viewport content="width=device-width, initial-scale=1.0" /><meta name=viewport content="width=device-width, initial-scale=1" /> <meta name=viewport content="width=device-width,initial-scale=1"> <meta http-equiv=x-ua-compatible content="ie=edge"> <meta name="lang:clipboard.copy" content="Copy to clipboard"> <meta name="lang:clipboard.copied" content="Copied to clipboard"> <meta name="lang:search.language" content=en > <meta name="lang:search.pipeline.stopwords" content=True > <meta name="lang:search.pipeline.trimmer" content=True > <meta name="lang:search.result.none" content="No matching documents"> <meta name="lang:search.result.one" content="1 matching document"> <meta name="lang:search.result.other" content="# matching documents"> <meta name="lang:search.tokenizer" content="[\s\-]+"> <link href="https://fonts.gstatic.com/" rel=preconnect crossorigin> <link href="https://fonts.googleapis.com/css?family=Roboto+Mono:400,500,700|Roboto:300,400,400i,700&display=fallback" rel=stylesheet > <style> body, input { font-family: "Roboto", "Helvetica Neue", Helvetica, Arial, sans-serif } code, kbd, pre { font-family: "Roboto Mono", "Courier New", Courier, monospace } </style> <link rel=stylesheet href="_static/stylesheets/application.css"/> <link rel=stylesheet href="_static/stylesheets/application-palette.css"/> <link rel=stylesheet href="_static/stylesheets/application-fixes.css"/> <link rel=stylesheet href="_static/fonts/material-icons.css"/> <meta name=theme-color content="#3f51b5"> <script src="_static/javascripts/modernizr.js"></script> <title>FPGA data analysis — Jungfraujoch 1.0.0-rc.122 documentation</title> <link rel=stylesheet type="text/css" href="_static/pygments.css?v=83e35b93" /> <link rel=stylesheet type="text/css" href="_static/material.css?v=79c92029" /> <script src="_static/documentation_options.js?v=7ebc78e1"></script> <script src="_static/doctools.js?v=9bcbadda"></script> <script src="_static/sphinx_highlight.js?v=dc90522c"></script> <link rel=icon href="_static/jfjoch.png"/> <link rel=index title=Index href=genindex.html /> <link rel=search title=Search href=search.html /> <link rel=next title="Detector geometry" href=DETECTOR_GEOMETRY.html /> <link rel=prev title="FPGA advanced reference" href=FPGA_SETTINGS.html /> <body dir=ltr data-md-color-primary=indigo data-md-color-accent=lime> <svg class=md-svg > <defs data-children-count=0 > <svg xmlns="http://www.w3.org/2000/svg" width=500 height=500 viewBox="0 0 500 500" id=__gitlab ><path fill=currentColor d="M93.667 473.347l90.684-279.097H2.983l90.684 279.097z" transform="translate(156.198 1.16)"/><path fill=currentColor d="M221.333 473.345L130.649 194.25H3.557l217.776 279.095z" transform="translate(28.531 1.16)" opacity=.7 /><path fill=currentColor d="M32 195.155L4.441 279.97a18.773 18.773 0 0 0 6.821 20.99l238.514 173.29L32 195.155z" transform="translate(.089 .256)" opacity=.5 /><path fill=currentColor d="M2.667-84.844h127.092L75.14-252.942c-2.811-8.649-15.047-8.649-17.856 0L2.667-84.844z" transform="translate(29.422 280.256)"/><path fill=currentColor d="M2.667 473.345L93.351 194.25h127.092L2.667 473.345z" transform="translate(247.198 1.16)" opacity=.7 /><path fill=currentColor d="M221.334 195.155l27.559 84.815a18.772 18.772 0 0 1-6.821 20.99L3.557 474.25l217.777-279.095z" transform="translate(246.307 .256)" opacity=.5 /><path fill=currentColor d="M130.667-84.844H3.575l54.618-168.098c2.811-8.649 15.047-8.649 17.856 0l54.618 168.098z" transform="translate(336.974 280.256)"/></svg> </defs> </svg> <input class=md-toggle data-md-toggle=drawer type=checkbox id=__drawer > <input class=md-toggle data-md-toggle=search type=checkbox id=__search > <label class=md-overlay data-md-component=overlay for=__drawer ></label> <a href="#FPGA_DATA_ANALYSIS" tabindex=1 class=md-skip > Skip to content </a> <header class=md-header data-md-component=header > <nav class="md-header-nav md-grid"> <div class="md-flex navheader"> <div class="md-flex__cell md-flex__cell--shrink"> <a href=index.html title="Jungfraujoch 1.0.0-rc.122 documentation" class="md-header-nav__button md-logo"> <i class=md-icon ></i> </a> </div> <div class="md-flex__cell md-flex__cell--shrink"> <label class="md-icon md-icon--menu md-header-nav__button" for=__drawer ></label> </div> <div class="md-flex__cell md-flex__cell--stretch"> <div class="md-flex__ellipsis md-header-nav__title" data-md-component=title > <span class=md-header-nav__topic >PSI Jungfraujoch</span> <span class=md-header-nav__topic > FPGA data analysis </span> </div> </div> <div class="md-flex__cell md-flex__cell--shrink"> <label class="md-icon md-icon--search md-header-nav__button" for=__search ></label> <div class=md-search data-md-component=search role=dialog > <label class=md-search__overlay for=__search ></label> <div class=md-search__inner role=search > <form class=md-search__form action=search.html method=get name=search > <input type=text class=md-search__input name=q placeholder=""Search"" autocapitalize=off autocomplete=off spellcheck=false data-md-component=query data-md-state=active > <label class="md-icon md-search__icon" for=__search ></label> <button type=reset class="md-icon md-search__icon" data-md-component=reset tabindex=-1 >  </button> </form> <div class=md-search__output > <div class=md-search__scrollwrap data-md-scrollfix> <div class=md-search-result data-md-component=result > <div class=md-search-result__meta > Type to start searching </div> <ol class=md-search-result__list ></ol> </div> </div> </div> </div> </div> </div> <div class="md-flex__cell md-flex__cell--shrink"> <div class=md-header-nav__source > <a href="https://gitea.psi.ch/mx/jungfraujoch" title="Go to repository" class=md-source data-md-source=github > <div class=md-source__icon > <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width=28 height=28 > <use xlink:href="#__gitlab" width=24 height=24 ></use> </svg> </div> <div class=md-source__repository > Jungfraujoch </div> </a> </div> </div> <script src="_static/javascripts/version_dropdown.js"></script> <script> var json_loc = ""versions.json"", target_loc = "../", text = "Versions"; $( document ).ready( add_version_dropdown(json_loc, target_loc, text)); </script> </div> </nav> </header> <div class=md-container > <nav class=md-tabs data-md-component=tabs > <div class="md-tabs__inner md-grid"> <ul class=md-tabs__list > <li class=md-tabs__item ><a href=index.html class=md-tabs__link >Jungfraujoch 1.0.0-rc.122 documentation</a> </ul> </div> </nav> <main class=md-main > <div class="md-main__inner md-grid" data-md-component=container > <div class="md-sidebar md-sidebar--primary" data-md-component=navigation > <div class=md-sidebar__scrollwrap > <div class=md-sidebar__inner > <nav class="md-nav md-nav--primary" data-md-level=0 > <label class="md-nav__title md-nav__title--site" for=__drawer > <a href=index.html title="Jungfraujoch 1.0.0-rc.122 documentation" class="md-nav__button md-logo"> <i class=md-icon ></i> </a> <a href=index.html title="Jungfraujoch 1.0.0-rc.122 documentation">PSI Jungfraujoch</a> </label> <div class=md-nav__source > <a href="https://gitea.psi.ch/mx/jungfraujoch" title="Go to repository" class=md-source data-md-source=github > <div class=md-source__icon > <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width=28 height=28 > <use xlink:href="#__gitlab" width=24 height=24 ></use> </svg> </div> <div class=md-source__repository > Jungfraujoch </div> </a> </div> <ul class=md-nav__list > <li class=md-nav__item > <span class="md-nav__link caption"><span class=caption-text >General</span></span> <li class=md-nav__item > <a href=ACKNOWLEDGEMENT.html class=md-nav__link >Acknowledgements</a> <li class=md-nav__item > <a href=LICENSE.html class=md-nav__link >License</a> <li class=md-nav__item > <a href=DETECTORS.html class=md-nav__link >Supported detectors</a> <li class=md-nav__item > <a href="DETECTORS.html#dectris-detectors" class=md-nav__link >DECTRIS detectors</a> <li class=md-nav__item > <a href=HARDWARE.html class=md-nav__link >Hardware requirements</a> <li class=md-nav__item > <a href=SOFTWARE.html class=md-nav__link >Software requirements</a> <li class=md-nav__item > <a href=VERSIONING.html class=md-nav__link >Semantic versioning</a> <li class=md-nav__item > <a href=DEPLOYMENT.html class=md-nav__link >Deployment</a> <li class=md-nav__item > <a href=CHANGELOG.html class=md-nav__link >Changelog</a> <li class=md-nav__item > <span class="md-nav__link caption"><span class=caption-text >Software</span></span> <li class=md-nav__item > <a href=JFJOCH_BROKER.html class=md-nav__link >jfjoch_broker</a> <li class=md-nav__item > <a href=JFJOCH_WRITER.html class=md-nav__link >jfjoch_writer</a> <li class=md-nav__item > <a href=TOOLS.html class=md-nav__link >Tools</a> <li class=md-nav__item > <span class="md-nav__link caption"><span class=caption-text >FPGA</span></span> <li class=md-nav__item > <a href=FPGA.html class=md-nav__link >FPGA smartNIC</a> <li class=md-nav__item > <a href=FPGA_LICENSE.html class=md-nav__link >FPGA license</a> <li class=md-nav__item > <a href=FPGA_DESIGN.html class=md-nav__link >FPGA data flow</a> <li class=md-nav__item > <a href=FPGA_NETWORK.html class=md-nav__link >FPGA network</a> <li class=md-nav__item > <a href=FPGA_PCIE_DRIVER.html class=md-nav__link >FPGA PCIe driver</a> <li class=md-nav__item > <a href=FPGA_SETTINGS.html class=md-nav__link >FPGA advanced reference</a> <li class=md-nav__item > <input class="md-toggle md-nav__toggle" data-md-toggle=toc type=checkbox id=__toc > <label class="md-nav__link md-nav__link--active" for=__toc > FPGA data analysis </label> <a href="#" class="md-nav__link md-nav__link--active">FPGA data analysis</a> <nav class="md-nav md-nav--secondary"> <ul class=md-nav__list data-md-scrollfix=""> </ul> </nav> <ul class=md-nav__list > <li class=md-nav__item > <a href="#pixel-mask" class=md-nav__link >Pixel mask</a> <li class=md-nav__item > <a href="#adu-histogram" class=md-nav__link >ADU histogram</a> <li class=md-nav__item > <a href="#jungfrau-conversion" class=md-nav__link >JUNGFRAU conversion</a> <li class=md-nav__item > <a href="#pixel-thresholding" class=md-nav__link >Pixel thresholding</a> <li class=md-nav__item > <a href="#frame-summation" class=md-nav__link >Frame summation</a> <li class=md-nav__item > <a href="#azimuthal-integration" class=md-nav__link >Azimuthal integration</a> <li class=md-nav__item > <a href="#spot-finding" class=md-nav__link >Spot finding</a> <li class=md-nav__item > <a href="#region-of-interest-roi-integration" class=md-nav__link >Region-of-interest (ROI) integration</a> <li class=md-nav__item > <a href="#pixel-statisitics" class=md-nav__link >Pixel statisitics</a> <li class=md-nav__item > <a href="#square-root-compression" class=md-nav__link >Square root compression</a> </ul> <li class=md-nav__item > <span class="md-nav__link caption"><span class=caption-text >Reference</span></span> <li class=md-nav__item > <a href=DETECTOR_GEOMETRY.html class=md-nav__link >Detector geometry</a> <li class=md-nav__item > <a href=CPU_DATA_ANALYSIS.html class=md-nav__link >Algorithms for data analysis</a> <li class=md-nav__item > <a href=OPENAPI.html class=md-nav__link >OpenAPI</a> <li class=md-nav__item > <a href=OPENAPI_SPECS.html class=md-nav__link >OpenAPI specification</a> <li class=md-nav__item > <a href=CBOR.html class=md-nav__link >CBOR messages</a> <li class=md-nav__item > <a href=ZEROMQ_STREAM.html class=md-nav__link >ZeroMQ socket</a> <li class=md-nav__item > <a href=PIXEL_MASK.html class=md-nav__link >Pixel mask</a> <li class=md-nav__item > <a href=WEB_FRONTEND.html class=md-nav__link >Web frontend</a> <li class=md-nav__item > <a href=TESTS.html class=md-nav__link >Tests</a> <li class=md-nav__item > <span class="md-nav__link caption"><span class=caption-text >OpenAPI Python client</span></span> <li class=md-nav__item > <a href="python_client/README.html" class=md-nav__link >jfjoch-client</a> <li class=md-nav__item > <a href="python_client/README.html#license-clarification" class=md-nav__link >License Clarification</a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html" class=md-nav__link >jfjoch_client.DefaultApi</a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#cancel-post" class=md-nav__link ><strong>cancel_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-azim-int-get" class=md-nav__link ><strong>config_azim_int_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-azim-int-put" class=md-nav__link ><strong>config_azim_int_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-dark-mask-get" class=md-nav__link ><strong>config_dark_mask_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-dark-mask-put" class=md-nav__link ><strong>config_dark_mask_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-detector-get" class=md-nav__link ><strong>config_detector_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-detector-put" class=md-nav__link ><strong>config_detector_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-file-writer-get" class=md-nav__link ><strong>config_file_writer_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-file-writer-put" class=md-nav__link ><strong>config_file_writer_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-image-format-conversion-post" class=md-nav__link ><strong>config_image_format_conversion_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-image-format-get" class=md-nav__link ><strong>config_image_format_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-image-format-put" class=md-nav__link ><strong>config_image_format_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-image-format-raw-post" class=md-nav__link ><strong>config_image_format_raw_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-indexing-get" class=md-nav__link ><strong>config_indexing_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-indexing-put" class=md-nav__link ><strong>config_indexing_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-instrument-get" class=md-nav__link ><strong>config_instrument_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-instrument-put" class=md-nav__link ><strong>config_instrument_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-internal-generator-image-put" class=md-nav__link ><strong>config_internal_generator_image_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-internal-generator-image-tiff-put" class=md-nav__link ><strong>config_internal_generator_image_tiff_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-mask-get" class=md-nav__link ><strong>config_mask_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-mask-tiff-get" class=md-nav__link ><strong>config_mask_tiff_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-roi-get" class=md-nav__link ><strong>config_roi_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-roi-put" class=md-nav__link ><strong>config_roi_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-select-detector-get" class=md-nav__link ><strong>config_select_detector_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-select-detector-put" class=md-nav__link ><strong>config_select_detector_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-spot-finding-get" class=md-nav__link ><strong>config_spot_finding_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-spot-finding-put" class=md-nav__link ><strong>config_spot_finding_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-user-mask-get" class=md-nav__link ><strong>config_user_mask_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-user-mask-put" class=md-nav__link ><strong>config_user_mask_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-user-mask-tiff-get" class=md-nav__link ><strong>config_user_mask_tiff_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-user-mask-tiff-put" class=md-nav__link ><strong>config_user_mask_tiff_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-zeromq-metadata-get" class=md-nav__link ><strong>config_zeromq_metadata_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-zeromq-metadata-put" class=md-nav__link ><strong>config_zeromq_metadata_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-zeromq-preview-get" class=md-nav__link ><strong>config_zeromq_preview_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#config-zeromq-preview-put" class=md-nav__link ><strong>config_zeromq_preview_put</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#deactivate-post" class=md-nav__link ><strong>deactivate_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#detector-status-get" class=md-nav__link ><strong>detector_status_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#fpga-status-get" class=md-nav__link ><strong>fpga_status_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#image-buffer-clear-post" class=md-nav__link ><strong>image_buffer_clear_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#image-buffer-image-cbor-get" class=md-nav__link ><strong>image_buffer_image_cbor_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#image-buffer-image-jpeg-get" class=md-nav__link ><strong>image_buffer_image_jpeg_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#image-buffer-image-tiff-get" class=md-nav__link ><strong>image_buffer_image_tiff_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#image-buffer-start-cbor-get" class=md-nav__link ><strong>image_buffer_start_cbor_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#image-buffer-status-get" class=md-nav__link ><strong>image_buffer_status_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#initialize-post" class=md-nav__link ><strong>initialize_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#pedestal-post" class=md-nav__link ><strong>pedestal_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#preview-pedestal-tiff-get" class=md-nav__link ><strong>preview_pedestal_tiff_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#preview-plot-bin-get" class=md-nav__link ><strong>preview_plot_bin_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#preview-plot-get" class=md-nav__link ><strong>preview_plot_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#result-scan-get" class=md-nav__link ><strong>result_scan_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#start-post" class=md-nav__link ><strong>start_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#statistics-calibration-get" class=md-nav__link ><strong>statistics_calibration_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#statistics-data-collection-get" class=md-nav__link ><strong>statistics_data_collection_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#statistics-get" class=md-nav__link ><strong>statistics_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#status-get" class=md-nav__link ><strong>status_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#trigger-post" class=md-nav__link ><strong>trigger_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#version-get" class=md-nav__link ><strong>version_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#wait-till-done-post" class=md-nav__link ><strong>wait_till_done_post</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#xfel-event-code-get" class=md-nav__link ><strong>xfel_event_code_get</strong></a> <li class=md-nav__item > <a href="python_client/docs/DefaultApi.html#xfel-pulse-id-get" class=md-nav__link ><strong>xfel_pulse_id_get</strong></a> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=toc > <div class=md-sidebar__scrollwrap > <div class=md-sidebar__inner > <nav class="md-nav md-nav--secondary"> <ul class=md-nav__list data-md-scrollfix=""> </ul> </nav> </div> </div> </div> <div class=md-content > <article class="md-content__inner md-typeset" role=main > <section id=fpga-data-analysis > <h1 id=fpga-data-analysis--page-root >FPGA data analysis<a class=headerlink href="#fpga-data-analysis--page-root" title="Link to this heading">¶</a></h1> <p>Jungfraujoch FPGA design has incorporated X-ray diffraction image analysis capabilities.</p> <section id=pixel-mask > <h2 id=pixel-mask >Pixel mask<a class=headerlink href="#pixel-mask" title="Link to this heading">¶</a></h2> <p>Pixels can be masked. For each module a 32-bit map of pixels is loaded to FPGA, with non-zero value meaning masked pixels. According to this map, pixels will be assigned a special value (minimum number for signed types and maximum number for non-signed types) and will be excluded from a subsequent analysis.</p> </section> <section id=adu-histogram > <h2 id=adu-histogram >ADU histogram<a class=headerlink href="#adu-histogram" title="Link to this heading">¶</a></h2> <p>Before conversion to photons/energy, an ADU histogram can be calculated for a module. This allows to preserve some signature of unconverted values. This is done on a module-basis and works with bins with 32 ADU width.</p> <p>For EIGER this can be used as just a histogram procedure.</p> </section> <section id=jungfrau-conversion > <h2 id=jungfrau-conversion >JUNGFRAU conversion<a class=headerlink href="#jungfrau-conversion" title="Link to this heading">¶</a></h2> <p>For JUNGFRAU module images are converted from ADUs to energy value and divided by a given number to keV units. Result of the operation is rounded to integers.</p> </section> <section id=pixel-thresholding > <h2 id=pixel-thresholding >Pixel thresholding<a class=headerlink href="#pixel-thresholding" title="Link to this heading">¶</a></h2> <p>Pixel range can be specified. Pixels below a minimum threshold will be assigned zero. Pixels above a maximum threshold will be assigned saturated pixel value (the largest number for a given bit-width and sign type). This is specifically designed to operate on unsummed frames, so frame-specific parameters (overload/noise) can be handled.</p> </section> <section id=frame-summation > <h2 id=frame-summation >Frame summation<a class=headerlink href="#frame-summation" title="Link to this heading">¶</a></h2> <p>Frames can be summed together (on a per-module basis) in Jungfraujoch, with a limit of 256 frames added together.</p> </section> <section id=azimuthal-integration > <h2 id=azimuthal-integration >Azimuthal integration<a class=headerlink href="#azimuthal-integration" title="Link to this heading">¶</a></h2> <p>To implement azimuthal integration, FPGA is able to sum pixels based on a provided integration map and per-pixel corrections. This way Jungfraujoch implements azimuthal integration with solid angle and polarization corrections. Corrections were implemented according to formulas developed by <a class="reference external" href="https://journals.iucr.org/s/issues/2022/06/00/fv5148/">Jensen et al. (J. Synchr. Rad., 29, 1420-1428, 2022)</a>.</p> <p>Given FPGA limitations, split-pixels cannot be implemented and number of bins is limited as 1024 per detector module. This way 2D azimuthal integration, as needed for example by SAS-TT, cannot be currently implemented with the FPGA card and needs to be done on a CPU. One needs to be careful with per-pixel corrections - their acceptable range is constrained by 16-bit pixed point integer implementation and is tuned for standard SAXS/WAXS range.</p> </section> <section id=spot-finding > <h2 id=spot-finding >Spot finding<a class=headerlink href="#spot-finding" title="Link to this heading">¶</a></h2> <p>Jungfraujoch FPGA implements a built-in spot finder. Spot finder allows to apply the following criteria for finding strong pixels:</p> <ol class="arabic simple"> <li><p>Resolution criterion - pixels only within a provided resolution range can be considered as strong pixels (calculating resolution map needs to happen on CPU before data collection run).</p> <li><p>Bad pixels - pixels marked as bad, as well as chip edges and module edges are excluded from spot finding,</p> <li><p>Overloads - pixels marked as overloads on JUNGFRAU are always included in the strong pixel output, but are excluded for signal-to-noise ratio calculation,</p> <li><p>Pixel value - pixels above certain threshold value can be marked as strong,</p> <li><p>Signal-to-noise (SNR) ratio - pixels with SNR above a threshold can be marked as strong,</p> <li><p>Connected pixels - strong pixels can be discarded if they are “alone”, so their 8 directly neighboring pixels are not counted as strong pixels.</p> </ol> <p>While besides bad pixels criterion, all the above are optional (can be turned off), only pixels that fulfill all enabled criteria are selected as strong pixels.</p> <section id=snr-ratio-calculation > <h3 id=snr-ratio-calculation >SNR ratio calculation<a class=headerlink href="#snr-ratio-calculation" title="Link to this heading">¶</a></h3> <p>Signal-to-noise ratio is calculated for a rectangular area. In horizontal direction the area is fixed - line of 1024 pixels is divided into 32 areas each of 32 pixels. This is dictated by the data flow within the FPGA. In vertical direction the area is flexible - it is 15 lines above and below of the given pixel. Given very large box size, approximation are made, for example that <code class="docutils literal notranslate"><span class=pre >N</span> <span class=pre >≈</span> <span class=pre >N-1</span></code> in calculating standard deviation.</p> </section> </section> <section id=region-of-interest-roi-integration > <h2 id=region-of-interest-roi-integration >Region-of-interest (ROI) integration<a class=headerlink href="#region-of-interest-roi-integration" title="Link to this heading">¶</a></h2> <p>Each pixel in a module can be assigned to one of 64 ROIs. For each ROIs, sum, sum of squares, max count, and number of valid pixels will be calculated. Jungfraujoch also calculates X and Y values weighted by pixel values, though this feature is not properly tested at the moment and not integrated in downstream analysis.</p> </section> <section id=pixel-statisitics > <h2 id=pixel-statisitics >Pixel statisitics<a class=headerlink href="#pixel-statisitics" title="Link to this heading">¶</a></h2> <p>The following statistics are collected for each module:</p> <ul class=simple > <li><p>Number of masked pixels</p> <li><p>Number of saturated pixels (excl.masked)</p> <li><p>Number of error pixels (excl. masked)</p> <li><p>Sum of valid pixels in the module</p> <li><p>Minimum value of valid pixels in the module</p> <li><p>Maximum value of valid pixels in the module Valid pixels are not masked, not saturated, not error pixels.</p> </ul> </section> <section id=square-root-compression > <h2 id=square-root-compression >Square root compression<a class=headerlink href="#square-root-compression" title="Link to this heading">¶</a></h2> <p>Jungfraujoch FPGA includes lossy compression preserving counting statistic properties of X-ray image, while reducing bit width of an image. Scheme was described in <a class="reference external" href="https://doi.org/10.1107/S1600576720001776">Wakonig et al., J. Appl. Cryst., 53, 574-586, 2020</a>. Pixel value <code class="docutils literal notranslate"><span class=pre >X</span></code> is replaced with <code class="docutils literal notranslate"><span class=pre >sqrt(N*X)</span></code>, where <code class="docutils literal notranslate"><span class=pre >N</span></code> is integer constant in range 1 to 16.</p> </section> </section> </article> </div> </div> </main> </div> <footer class=md-footer > <div class=md-footer-nav > <nav class="md-footer-nav__inner md-grid"> <a href=FPGA_SETTINGS.html title="FPGA advanced reference" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel=prev > <div class="md-flex__cell md-flex__cell--shrink"> <i class="md-icon md-icon--arrow-back md-footer-nav__button"></i> </div> <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"> <span class=md-flex__ellipsis > <span class=md-footer-nav__direction > "Previous" </span> FPGA advanced reference </span> </div> </a> <a href=DETECTOR_GEOMETRY.html title="Detector geometry" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel=next > <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"><span class=md-flex__ellipsis > <span class=md-footer-nav__direction > "Next" </span> Detector geometry </span> </div> <div class="md-flex__cell md-flex__cell--shrink"><i class="md-icon md-icon--arrow-forward md-footer-nav__button"></i> </div> </a> </nav> </div> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-footer-copyright > <div class=md-footer-copyright__highlight > © Copyright 2024, Paul Scherrer Institute. </div> Created using <a href="http://www.sphinx-doc.org/">Sphinx</a> 8.1.3. and <a href="https://github.com/bashtage/sphinx-material/">Material for Sphinx</a> </div> </div> </div> </footer> <script src="_static/javascripts/application.js"></script> <script>app.initialize({version: "1.0.4", url: {base: ".."}})</script> |