{"id":1708,"date":"2017-10-13T22:44:17","date_gmt":"2017-10-13T20:44:17","guid":{"rendered":"https:\/\/www.adimec.com\/new-cmos-image-sensors-with-smaller-pixel-size-can-replace-older-cameras-with-no-change-in-optics\/"},"modified":"2018-07-30T08:46:24","modified_gmt":"2018-07-30T06:46:24","slug":"new-cmos-image-sensors-with-smaller-pixel-size-can-replace-older-cameras-with-no-change-in-optics","status":"publish","type":"post","link":"https:\/\/www.adimec.com\/ja\/new-cmos-image-sensors-with-smaller-pixel-size-can-replace-older-cameras-with-no-change-in-optics\/","title":{"rendered":"New CMOS image sensors with smaller pixel size can replace older cameras with no change in optics"},"content":{"rendered":"<p>For many global security systems, the optical format was decided by the initial choice of the image sensor, for instance a 1\/3\u201d VGA sensor or 2\/3\u201d HD CCD image sensors with pixel sizes of 6 or 7 \u00b5m. These legacy systems are now due for upgrades to take advantage of the sensitivity, lower read noise and higher pixel throughput of the latest CMOS image sensors. &nbsp;CMOS process technology improvements have allowed for shrinking of pixels while preserving important imaging parameters: (QE, charge handling capacity per square \u00b5m, and more). BUT much smaller pixel sizes can result in a much bigger overhaul of the system than is desired such as a change in optics and displays. &nbsp;<\/p>\n<p><!--more--><\/p>\n<p>There is now a way for any new camera to fit on existing optics and on the existing interface\/displays; for example, using a state-of-the-art Quad HD CMOS image sensor to replace an older VGA CCD with larger pixels on VGA displays.<\/p>\n<p>Adimec\u2019s proprietary Adaptive Resolution\u2122 provides the option to emulate the original optical format using programmable digital image down-scaling.<\/p>\n<p>Adaptive Resolution (Adimec proprietary) allows the system architect or designer to select a new CMOS image sensor without changing optics and losing dynamic range.&nbsp;<\/p>\n<p id=\"last\">Adaptive Resolution can be used with a CMOS image sensor with more pixels and with the same (or larger) optical format than the existing cameras. Advanced interpolation algorithms for cropping and scaling in the camera create virtual pixels of the required size (same image format at output).<\/p>\n<p>This results in the <em>same<\/em> FOV, combined with a better system performance (new CMOS pixels outperform CCD pixels of the same size):<\/p>\n<ul>\n<li>Higher sensitivity<\/li>\n<li>Higher dynamic range<\/li>\n<li>Higher MTF (especially for Bayer RGB color)<\/li>\n<\/ul>\n<p>To verify the results, we compare Adimec\u2019s TMX7-DHD camera using the ICX674 CCD sensor with 4.54 \u00b5m square pixel size, with the TMX50 camera using Sony\u2019s IMX250 CMOS image sensor with 3.45 \u00b5m square pixel size using Adaptive Resolution technology to run at a virtual pixel size of 4.54 \u00b5m.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cdn2.hubspot.net\/hubfs\/20421\/images\/TMX7-ccd-camera-low-light_color.jpg\" alt=\"TMX7-ccd-camera-low-light_color.jpg\" title=\"TMX7-ccd-camera-low-light_color.jpg\" width=\"702\" height=\"404\"><\/p>\n<p>Figure 1a. TMX7-DHD CCD Camera (4.54 um pixels)<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cdn2.hubspot.net\/hubfs\/20421\/images\/TMX50-low-light-color-adaptive-resolution.jpg\" alt=\"TMX50-low-light-color-adaptive-resolution.jpg\" title=\"TMX50-low-light-color-adaptive-resolution.jpg\" width=\"702\" height=\"404\"><\/p>\n<p>Figure 1b. TMX50 CMOS (4.54um Adaptive Resolution)<\/p>\n<p>&nbsp;<\/p>\n<p>No difference is readily visible in the images.&nbsp; With zooming in, small sharpness improvements can be detected such as looking at the \u201cNieuw recept\u201d lettering.<\/p>\n<p>&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cdn2.hubspot.net\/hubfs\/20421\/images\/ccd-cmos-comparison.jpg\" alt=\"ccd-cmos-comparison.jpg\" title=\"ccd-cmos-comparison.jpg\" width=\"702\" height=\"347\"><\/p>\n<p>Figure 2. &nbsp; TMX7-DHD &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; TMX50 with Adaptive Resolution<\/p>\n<p>&nbsp;<\/p>\n<div id=\"slidebox\"><a class=\"close\">&nbsp;<\/a><a href=\"https:\/\/www.adimec.com\/blogs\/\" target=\"_blank\"><img decoding=\"async\" class=\"shadow alignCenter\" style=\"width: 90%; height: auto;\" src=\"http:\/\/info.adimec.com\/hubfs\/CTA_for_subscribe_landing_page.jpg\"><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>For many global security systems, the optical format was decided by the initial choice of the image sensor, fo&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1708","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-1","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3 - 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