Capturing fast-moving objects was a huge challenge in the early days of machine vision and embedded vision. In factory automation where the application of vision technologies was the most common, blurry images led to issues in product identification, counting, and sorting. Phenomena like rolling shutter artifacts made it difficult to capture the details of the objects on a conveyor belt or assembly line.
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The invention of global shutter sensors became a solution to this issue. A global shutter camera has the ability to eliminate shutter artifacts, thereby ensuring that even objects moving at high speed can be captured without fail. Global shutter cameras with high frame rates also ensure that the output does not have motion blur.
In this article, we present what global shutter cameras are, the advantages of using them in next-gen mobile robots, and the different robotic applications where global shutter cameras are used today.
Most of the DSLR cameras and mobile 's cameras are using Rolling Shutter technology including Canon, Nikon, and iPhones, while industry cameras are using Global Shutter technology. Why cameras are so different, let's take a look at the facts of these two kinds of technology.
Rolling Shutter, usually found in CMOS sensors is a method of capturing an image that does not expose the entire sensor pixels simultaneously, actually it exposures line by line from top to bottom.
Rather than the rolling shutter camera, the global shutter camera exposures all pixels at the same time. The shutter opens at a certain time then closed, blocking the light enter into the sensor.
Here is a short demonstration of how rolling shutter works in a simplified 10×10 CMOS sensor.
For more information, please visit 2mp Global Shutter Camera Module Manufacturer.
Most of the people think that the rolling shutter is bad. I don't think so, it is just a kind of technology. There is no better from one than the other if you don't compare them according to a given application. General speaking rolling shutter is good when low cost, high resolution, and high frame rate is needed, while the global shutter is good for fast moving objects and machine vision applications.
ArduCAM now introduces two global shutter camera headboard based on ON-Semi (used to be Aptina) MT9V022/ MT9V034 (0.3MP) and AR/AR (1.2MP). The camera headboard can be used with ARM, DSP, FPGA so similar platforms with parallel camera interfaces.
ArduCAM also provides USB camera shield for seamless integration for these global shutter camera board. Mono and color types are available for both types. The main spec for each sensor list below.
Part NumberOVMT9V022/MT9V034AR/ARArray Size640(H) x 480(V)752(H) x 480(V)(H) x 960(V)Optical Format1/7.5' inch1/3' inch1/3' inchFrame Rate100fps at full resolution60fps at full resolution54fps at full resolution
60fps at 720p
DAC output10-bit10-bit12-bitTrigger modeAuto or external trigger inputAuto or external trigger inputAuto or external trigger inputPower Consumption119mW160mW400mWOperation Temperature-30 ~ +70°C-40 ~ +85°C-30 ~ +70°CColorMono Bayer PatternMono/RGB Bayer PatternMono/RGB Bayer PatternPixel Size3μm6μm3.75μmResponsivity10.8V/Lux-sec4.8V/Lux-sec6.1V/lux-secDynamic RangeLinear:69.6dBLinear:60dB, Extended: 100dB64dBLens mountStock lensC/CS or M12.5 mountC/CS or M12.5 mountSend us an whenever you need any support from us.
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