{"id":886,"date":"2018-04-25T19:29:55","date_gmt":"2018-04-25T19:29:55","guid":{"rendered":"https:\/\/www.1stvision.com\/machine-vision-solutions\/?p=886"},"modified":"2018-04-26T16:48:55","modified_gmt":"2018-04-26T16:48:55","slug":"jai-apex-series-3-cmos-machine-vision-cameras","status":"publish","type":"post","link":"https:\/\/www.1stvision.com\/machine-vision-solutions\/2018\/04\/jai-apex-series-3-cmos-machine-vision-cameras.html","title":{"rendered":"3-CMOS machine vision cameras bring color fidelity to the market at half the price as previous models"},"content":{"rendered":"

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

Single sensor machine vision cameras use a mosaic filter placed on the sensor to create color images.\u00a0 This is also called a \u2018Bayer\u2019 filter, named after the person who invented it.\u00a0 However, color images from this filter lose resolution and color fidelity compared to \u2018true\u2019 color images.\u00a0 Spatial resolution is lost due to interpolation, while the Bayer filter pattern reduces true color representation, sensitivity and dynamic range.\u00a0\u00a0 To overcome these issues, multi-sensor\u00a0(3-CCD \/ 3-CMOS)\u00a0 machine vision cameras<\/span><\/strong><\/a>\u00a0<\/span><\/strong>can be used.<\/p>\n

Typically, machine vision 3-CCD cameras were high cost, until now with CMOS sensors becoming the leading image sensor technology.\u00a0 Now, machine vision 3-CMOS machine cameras provide major benefits over Bayer cameras and at more attractive entrance cost.<\/p>\n

CMOS sensor technology has lowered the price of 3 image sensor cameras by 50% providing a better alternative to Bayer color cameras for many applications<\/strong>.\u00a0 JAI’s Apex Series 3-CMOS cameras<\/a> <\/strong><\/span>are the game changer for demanding color applications. \u00a0\u00a0 \"Contact<\/a><\/p>\n

Watch this video to learn more about 3-CCD\/3-CMOS cameras<\/strong><\/span><\/em><\/a><\/p>\n

Machine Vision 3-CMOS cameras Vs Bayer cameras provide major benefits for color applications<\/strong><\/h2>\n

Better color precision<\/strong> \u2013 Accurate RGB values are obtained for each pixel so there is no interpolation\/estimation of colors as found in Bayer cameras. This can be critical for paint\/ink matching, printing inspection systems, digital pathology, or other applications where color values must be extremely accurate.\"comparison<\/a><\/p>\n

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Better spatial resolution \u2013<\/strong>\u00a0 The Bayer interpolation process also tends to blend edges and small details. While this can be pleasing to the eye, it can make spatial measurements or bar code reading imprecise or error prone, causing the use of more expensive high resolution Bayer cameras or requiring a second monochrome camera for imaging these details<\/p>\n

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

Higher sensitivity<\/strong> \u2013 The prism glass in the AP-3200T-USB<\/a> <\/span>and associated cameras, has better light transmission properties than the polymer filters in a standard Bayer sensor.\u00a0 This enables more light to reach the pixels for better overall sensitivity and lower lighting requirements.<\/p>\n

Lower noise, higher dynamic range<\/strong> \u2013 White balancing on a JAI prism camera<\/a> <\/span>can be done on individual channels with shutter adjustments instead of adding gain to the image. This results in lower noise and higher usable dynamic range.<\/p>\n

\"3ccd<\/a><\/p>\n

What about \u201cimproved\u201d Bayer capabilities like 5×5 interpolation?<\/strong><\/p>\n

Several camera manufacturers claim vastly improved capabilities for color imaging, including 5×5 de-Bayering, color-anti-aliasing, denoising
\nand improved sharpness.\u00a0 But consider the following:\u00a0 5×5 interpolation
\nmeans you are using an even larger area within the image to estimate each pixel\u2019s color value. So while this can do a better job of \u201csmoothing\u201d color transitions to the eye, it can actually result in less-precise color values for image processing, especially where color variation is high.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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This is illustrated in the following images, under identical conditions, by a camera with 5 x 5 debayering and a JAI Apex 3-CMOS camera<\/a><\/span>.\u00a0 The CIE L*a*b* reference chart provides a set of exact color values when expected under specified lighting conditions.\u00a0\u00a0 The result:\u00a0 5×5 debayering results in 40%\u00a0 out of match to the expected colors vs 13% for the JAI Apex 3-CMOS camera!<\/div>\n
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\"JAI<\/a>More advanced color imaging features<\/strong><\/p>\n

JAI’s Apex 3-CMOS machine vision cameras provide additional advanced features aside from excellent color fidelity and highlighted as follows:<\/p>\n