{"id":426,"date":"2022-01-23T09:15:23","date_gmt":"2022-01-23T14:15:23","guid":{"rendered":"https:\/\/davidwdrell.net\/wordpress\/?p=426"},"modified":"2023-05-22T06:05:25","modified_gmt":"2023-05-22T11:05:25","slug":"fun-numpy-things","status":"publish","type":"post","link":"https:\/\/davidwdrell.net\/wordpress\/?p=426","title":{"rendered":"Fun numpy things"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Diff two images<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>diff_image = abs(prediction_mask - true_mask)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Count pixels that exactly match between two images<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>diff_image = abs(prediction_mask - true_mask)\nmatches = 1.0 * (diff_image == 0)\nmatches_count = np.sum(matches)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Count prediction pixels that do not match truth-mask pixels<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>diff_image = abs(prediction_mask - true_mask)\nunpaired_pred_msk  = 1.0 * (prediction_mask&gt;0) * (diff_img&gt;0)       \nun_matched_pred_count = np.sum(unpaired_pred_msk)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Diff two images Count pixels that exactly match between two images Count prediction pixels that do not match truth-mask pixels<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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