{"id":67,"date":"2022-09-25T22:16:49","date_gmt":"2022-09-25T22:16:49","guid":{"rendered":"http:\/\/localhost\/?p=67"},"modified":"2023-12-06T11:30:31","modified_gmt":"2023-12-06T11:30:31","slug":"colorstamps-2d-colormaps","status":"publish","type":"post","link":"http:\/\/bentus\/colorstamps-2d-colormaps\/","title":{"rendered":"Colorstamps \u2013 2d colormaps"},"content":{"rendered":"\n<p>Colorstamps is a python package hosted on <a href=\"https:\/\/github.com\/trygvrad\/colorstamps\/\">github<\/a> and <a href=\"https:\/\/pypi.org\/project\/colorstamps\/\">pypi<\/a> for 2d colorstamps in defined as geometric shapes in the CAM02-LCD <a href=\"https:\/\/github.com\/njsmith\/colorspacious\">colorspace<\/a>. Documentation at <a href=\"https:\/\/colorstamps.readthedocs.io\/en\/latest\/\">readthedocs<\/a>. The package is inspired by the uniform colormaps in <a href=\"https:\/\/matplotlib.org\/stable\/tutorials\/colors\/colormaps.html\">matplotlib<\/a>, which has has greatly improved the visualization of scalar scientific image data.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>The project contains a number of 2d colormaps (stamps), suitable for different data types, it is useful to distinguish between data of like-type, and data of different type, and also unimodal (only positive) and bimodal (positive and negative) data.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"425\" height=\"1024\" src=\"http:\/\/localhost\/wp-content\/uploads\/2023\/06\/colormaps-425x1024.png\" alt=\"\" class=\"wp-image-68\" srcset=\"http:\/\/bentus\/wp-content\/uploads\/2023\/06\/colormaps-425x1024.png 425w, http:\/\/bentus\/wp-content\/uploads\/2023\/06\/colormaps-125x300.png 125w, http:\/\/bentus\/wp-content\/uploads\/2023\/06\/colormaps-600x1445.png 600w, http:\/\/bentus\/wp-content\/uploads\/2023\/06\/colormaps.png 615w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><\/figure>\n\n\n\n<p>\u2022 If both axes are bimodal, and of like type, the axis should have a round shape with an origin in the middle, and \u2018disk\u2019\/\u2019cone\u2019\/\u2019funnel\u2019 are suitable.<br>\u2022 With one unimodal and one bimodal axis (i.e. intensity + phase shift etc.) \u2018cut\u2019 is a suitable colormap, and this exists in mulitple variations. If one axis is circular, \u2018barrel\u2019 loops on the x-axis.<br>\u2022 With two unimodal axis, \u2018orangeBlue\u2019 is recommended.<\/p>\n\n\n\n<p>Data outside the colormap must be projected into the valid space, and there are multiple options.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"455\" height=\"208\" src=\"http:\/\/localhost\/wp-content\/uploads\/2023\/06\/point_outside_colormap.webp\" alt=\"\" class=\"wp-image-72\" srcset=\"http:\/\/bentus\/wp-content\/uploads\/2023\/06\/point_outside_colormap.webp 455w, http:\/\/bentus\/wp-content\/uploads\/2023\/06\/point_outside_colormap-300x137.webp 300w\" sizes=\"(max-width: 455px) 100vw, 455px\" \/><\/figure>\n\n\n\n<p>Finally, the RGB colorspace on a computer can only represent a fraction of the CAM02-LCD colorspace, and colorstamps will limit the colors in the colormap to fit the RGB colorspace. A tool for evaluation of 2d colormaps are included.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"589\" height=\"130\" src=\"http:\/\/localhost\/wp-content\/uploads\/2023\/06\/eval_peak.png\" alt=\"\" class=\"wp-image-71\" srcset=\"http:\/\/bentus\/wp-content\/uploads\/2023\/06\/eval_peak.png 589w, http:\/\/bentus\/wp-content\/uploads\/2023\/06\/eval_peak-300x66.png 300w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"589\" height=\"130\" src=\"http:\/\/localhost\/wp-content\/uploads\/2023\/06\/eval_hsv-1.png\" alt=\"\" class=\"wp-image-70\" srcset=\"http:\/\/bentus\/wp-content\/uploads\/2023\/06\/eval_hsv-1.png 589w, http:\/\/bentus\/wp-content\/uploads\/2023\/06\/eval_hsv-1-300x66.png 300w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Colorstamps is a python package hosted on github and pypi for 2d colorstamps in defined as geometric shapes in the CAM02-LCD colorspace. Documentation at readthedocs. The package is inspired by the uniform colormaps in matplotlib, which has has greatly improved the visualization of scalar scientific image data.<\/p>\n","protected":false},"author":1,"featured_media":69,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/bentus\/wp-json\/wp\/v2\/posts\/67"}],"collection":[{"href":"http:\/\/bentus\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bentus\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/comments?post=67"}],"version-history":[{"count":3,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/posts\/67\/revisions"}],"predecessor-version":[{"id":83,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/posts\/67\/revisions\/83"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/media\/69"}],"wp:attachment":[{"href":"http:\/\/bentus\/wp-json\/wp\/v2\/media?parent=67"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/categories?post=67"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bentus\/wp-json\/wp\/v2\/tags?post=67"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}