{"id":1831,"date":"2014-01-15T22:44:38","date_gmt":"2014-01-15T21:44:38","guid":{"rendered":"https:\/\/www.adimec.com\/binning-to-increase-snr-and-frame-rate-with-ccd-and-cmos-industrial-cameras\/"},"modified":"2018-08-03T15:34:30","modified_gmt":"2018-08-03T13:34:30","slug":"binning-to-increase-snr-and-frame-rate-with-ccd-and-cmos-industrial-cameras","status":"publish","type":"post","link":"https:\/\/www.adimec.com\/ja\/binning-to-increase-snr-and-frame-rate-with-ccd-and-cmos-industrial-cameras\/","title":{"rendered":"Binning to increase SNR and frame rate with CCD and CMOS industrial cameras"},"content":{"rendered":"
\n

There are always small changes (at no additional product cost) that can be made to increase the performance of your machine vision camera and thus to your overall inspection or metrology system.\u00a0 Binning is one example.\u00a0 There has been a trend with latest generation image sensors to increase resolution while also reducing the pixel size<\/a> at the expense of some other performance parameters. If you do not need all of the resolution provided, but require better signal to noise ratio for instance, then binning is an easy solution.\u00a0 Here we will discuss binning with CCD cameras (interline transfer image sensor technology).\u00a0 For more information on binning with CMOS cameras<\/a>, please see a previous post.<\/p>\n

<\/p>\n

Binning is the same as adding the charge of 2 or more pixels together. The charge in the target pixel then represents the illumination of 2 (or more) pixels.\u00a0 It is possible to bin pixels vertically by shifting two image rows into the horizontal register without reading it after the first shift. \u00a0\u00a0It is also possible to bin pixels horizontally by shifting the horizontal register two times into output node without resetting it after the first shift. Horizontal binning cannot be done on the image sensor; this is done in the digital domain in the image processing. \u00a0Vertical binning, however, can be done on the sensor level.<\/p>\n

With vertical binning, the charge of multiple lines is combined in the HCCD before they are readout. For binning of 4 lines this means vertical transport of 4 lines and after that the horizontal transport of this binned line takes place. \u00a0After that the cycle of vertical transport of 4 lines and horizontal readout starts again.<\/p>\n

Combining of both vertical and horizontal binning leads to square (or rectangular) image binning. For example 2\u00a0\u00d7\u00a02 binning is a combination of 2\u00d7 vertical and 2\u00d7 horizontal binning.<\/p>\n

The primary benefit of binning is higher signal-to-noise ratio (SNR) due to reduced read noise contributions and increased signal combinations. \u00a0CCD read noise is added during each readout event and in normal operation, read noise will be added to each pixel. However, in binning mode, read noise is added to each super pixel, which has the combined signal from multiple pixels. In the ideal case, this produces SNR improvement equal to the binning factors.<\/p>\n

With binning you can increase pixel size arbitrarily (but reduce the spatial resolution). In the limit we could even read out the CCD as a single large pixel.<\/p>\n

Another use of binning is to increase the frame rate. Since the slowest step in the readout sequence is the digitization of a given pixel, binning can be used to increase the effective total frame rate of a given system. Thus, highly binned, low-resolution images can be obtained when high speed is required.<\/p>\n

\"machine<\/a><\/p>\n

Example of 2×2 binning with a CCD camera<\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

There are always small changes (at no additional product cost) that can be made to increase the performance of…<\/p>\n","protected":false},"author":3,"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-1831","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-1","description-off"],"yoast_head":"\nBinning to increase SNR and frame rate with CCD and CMOS industrial cameras - Adimec JA<\/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.adimec.com\/ja\/binning-to-increase-snr-and-frame-rate-with-ccd-and-cmos-industrial-cameras\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Binning to increase SNR and frame rate with CCD and CMOS industrial cameras - 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