{"id":56844,"date":"2026-02-18T01:00:08","date_gmt":"2026-02-18T09:00:08","guid":{"rendered":"https:\/\/www.edge-ai-vision.com\/?p=56844"},"modified":"2026-02-17T17:31:39","modified_gmt":"2026-02-18T01:31:39","slug":"pushing-the-limits-of-hdr-with-ubicept","status":"publish","type":"post","link":"https:\/\/www.edge-ai-vision.com\/2026\/02\/pushing-the-limits-of-hdr-with-ubicept\/","title":{"rendered":"Pushing the Limits of HDR with Ubicept"},"content":{"rendered":"<p><em>This blog post was originally published at <a href=\"https:\/\/www.ubicept.com\/blog\/pushing-the-limits-of-hdr-with-ubicept\">Ubicept\u2019s website<\/a>. It is reprinted here with the permission of Ubicept.<\/em><\/p>\n<h2>Executive summary<\/h2>\n<ul>\n<li>Ubicept\u2019s SPAD-based system offers consistent HDR performance in nighttime driving conditions, preserving shadow and highlight detail where conventional cameras fall short.<\/li>\n<li>Unlike traditional HDR techniques which often struggle with motion artifacts, Ubicept Photon Fusion maintains clarity even when both the camera and scene are in motion.<\/li>\n<li>Watch\u00a0<a href=\"https:\/\/www.youtube.com\/watch\">https:\/\/www.youtube.com\/watch?v=KxucJYv63pI<\/a>\u00a0on an HDR-capable display to compare a conventional CMOS camera with in-sensor HDR and a SPAD camera with Ubicept processing<\/li>\n<\/ul>\n<h2>Introduction<\/h2>\n<p>At Ubicept, we often talk about the \u201cimpossible triangle\u201d\u2014low light, fast motion, and high dynamic range\u2014and how our technology enables perception even when all three are present. That said, it\u2019s been a while since we\u2019ve highlighted our HDR capabilities, so we decided to take a spin around town with our new color setup to show them off.<\/p>\n<p>Before we dive in, let\u2019s take a moment to talk about why high dynamic range matters for perception. Our world is full of extreme lighting contrasts. On sunny days, reflections from shiny surfaces can blind both humans and machines. At night, brilliant headlights and streetlamps create intense pools of light that leave surrounding areas in deep shadow. If a perception system can\u2019t resolve detail across both the bright and the dark, it risks missing critical information. That\u2019s why image sensors designed for applications like advanced driver assistance systems (ADAS) often emphasize their ability to handle these challenging scenarios.<\/p>\n<h2>Experimental setup<\/h2>\n<p>For this demo, we rigged up two systems side by side:<\/p>\n<ul>\n<li>Our prototype development kit, featuring a 1-megapixel SPAD sensor and Ubicept processing<\/li>\n<li>A 5-megapixel dash camera, featuring a low-light CMOS sensor with built-in HDR capabilities<\/li>\n<\/ul>\n<p>The development kit camera was mounted outside the vehicle to capture an unobstructed view. Unfortunately, the dash camera had to remain inside due to its physical design, making it more susceptible to glare from the windshield. So, while this isn\u2019t a perfectly fair or scientific comparison, the dramatic differences you\u2019re about to see should still offer meaningful insight into the relative performance of the two systems in real-world scenarios.<\/p>\n<p>Before you press play:<\/p>\n<ul>\n<li><strong>For best results, please view this on an HDR-capable display.\u00a0<\/strong>You can still appreciate the video on a typical SDR desktop or laptop monitor, but the results are truly stunning on an OLED smartphone or television.<\/li>\n<li>We exported the video at half speed to highlight motion detail. The dash camera only outputs at 30 fps in HDR mode, so it will look choppy when slowed down by 50%.<\/li>\n<\/ul>\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe title=\"Pushing the Limits of HDR with Ubicept\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/KxucJYv63pI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<h2><\/h2>\n<h2>Key observations<\/h2>\n<p>We hope the comparison video speaks for itself, but we wanted to highlight a few key moments to observe if you choose to review the footage again.<\/p>\n<p>First, even though the dash camera runs in HDR mode, there are plenty of situations where its dynamic range just isn\u2019t enough. Take this frame at 3:39:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full\" src=\"https:\/\/cdn.prod.website-files.com\/665dcd9b927826d5caa21b0b\/685c9d65cc9571db0ed7c9d4_SyncSelects144060ReimportHighlights-Frame-cem-box.webp\" \/><\/p>\n<p style=\"text-align: center;\"><strong>\u00a0To see this frame in full quality, see 3:39 in the video on an HDR-capable display<\/strong><\/p>\n<p>The outlined area is actually well-lit by the surrounding environment, but the dash camera sacrifices shadow detail to avoid overexposing the bright building. As a consequence, the trees disappear into the noise floor. In contrast, our system preserves both highlights and shadows, revealing the entire scene clearly.<\/p>\n<p>We also noticed some HDR-specific artifacts in the dash camera footage. In the frame at 0:27 below, the outlined region shows a sharp window, while the bright green container (moving at the same speed relative to the car) is blurred beyond recognition:<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter size-full\" src=\"https:\/\/cdn.prod.website-files.com\/665dcd9b927826d5caa21b0b\/685cb220fe26b4c898bf9fec_SyncSelects144060ReimportHighlights-Frame-bin-box.webp\" \/><\/p>\n<p style=\"text-align: center;\"><strong>To see this frame in full quality, see 0:27 in the video on an HDR-capable display<\/strong><\/p>\n<p>This is notable because, under normal conditions, motion blur reflects how much something is moving. With conventional HDR, however, that relationship becomes more complex due to how these systems operate. They blend short exposures for bright regions with longer ones for darker areas, causing motion blur to also vary by brightness. The result is frames that are harder to interpret.<\/p>\n<p>These techniques can also introduce artifacts, as shown in this frame at 3:03:<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter size-full\" src=\"https:\/\/cdn.prod.website-files.com\/665dcd9b927826d5caa21b0b\/685cb7d54c3fa1597b26d4a3_SyncSelects144060ReimportHighlights-Frame-tun-box.webp\" \/><\/p>\n<p style=\"text-align: center;\"><strong>To see this frame in full quality, see 3:03 in the video on an HDR-capable display<\/strong><\/p>\n<p>We can\u2019t say for sure what\u2019s happening here, since we don\u2019t have details about the dash camera\u2019s HDR implementation, but suffice it to say that falsely repeated objects can be confusing for downstream perception systems. The more important point, at least for this demo, is that the SPAD camera with Ubicept processing is able to deliver consistent performance across all the situations we encountered.<\/p>\n<p><em>Please note that the still images above were mapped down to SDR for web display, so some of the shadows and highlights may appear clipped. The video itself should show the full range, so we encourage you to view it on an HDR-capable display.<\/em><\/p>\n<h2>Technical notes<\/h2>\n<p>You might be thinking,\u00a0<em>\u201cWow, SPADs are amazing!\u201d<\/em>\u00a0And they are, but they\u2019re not enough on their own to produce results like this. We addressed this directly in a\u00a0<a href=\"https:\/\/www.ubicept.com\/blog\/what-can-spads-do-alone\">previous blog post<\/a>, as well as on our\u00a0<a href=\"https:\/\/www.ubicept.com\/technology\">Technology<\/a>\u00a0and\u00a0<a href=\"https:\/\/www.ubicept.com\/applications\/passive-vision\">Passive Vision<\/a>\u00a0pages. What we\u2019re showing here isn\u2019t the result of a special \u201cHDR SPAD\u201d or a dedicated HDR algorithm. It\u2019s all part of the same core pipeline. Put simply, HDR is just one of many challenges our system is built to handle.<\/p>\n<p>With that said, achieving the best results isn\u2019t just about the sensor and processing. As we built this demo, we came to appreciate how important it is for all parts of the system to work together. In early tests using standard machine vision lenses, we found that glare significantly reduced contrast. That led us to the\u00a0<a href=\"https:\/\/sunex.com\/2025\/05\/27\/dsl428\/\">Sunex DSL428<\/a>\u2014we were admittedly skeptical at first of its \u201cHDR-optimized\u201d marketing, but it turns out the designation was well-earned!<\/p>\n<p>We also ran into some practical challenges, like condensation forming on the optical components as the night cooled (note to self:\u00a0bring some microfiber cloths next time). That\u2019s something we\u2019ll address in future demos, but the key takeaway is that the sensor and processing weren\u2019t the limiting factors. Either way, we\u2019re looking forward to showing even better results here with continued refinements to the optics and housing. Of course, if you want to see how our technology performs on your most demanding perception tasks,\u00a0<a href=\"https:\/\/www.ubicept.com\/contact-us\">we\u2019d love to hear from you<\/a>!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This blog post was originally published at Ubicept\u2019s website. It is reprinted here with the permission of Ubicept. Executive summary Ubicept\u2019s SPAD-based system offers consistent HDR performance in nighttime driving conditions, preserving shadow and highlight detail where conventional cameras fall short. Unlike traditional HDR techniques which often struggle with motion artifacts, Ubicept Photon Fusion maintains [&hellip;]<\/p>\n","protected":false},"author":15833,"featured_media":56845,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_uag_custom_page_level_css":"","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3,772,4348],"tags":[],"class_list":["post-56844","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-sensors","category-ubicept"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pushing the Limits of HDR with Ubicept - Edge AI and Vision Alliance<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.edge-ai-vision.com\/2026\/02\/pushing-the-limits-of-hdr-with-ubicept\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pushing the Limits of HDR with Ubicept - Edge AI and Vision Alliance\" \/>\n<meta property=\"og:description\" content=\"This blog post was originally published at Ubicept\u2019s website. It is reprinted here with the permission of Ubicept. Executive summary Ubicept\u2019s SPAD-based system offers consistent HDR performance in nighttime driving conditions, preserving shadow and highlight detail where conventional cameras fall short. 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