OUR BLOGS

<!-- JSON-LD markup generated by Google Structured Data Markup Helper. --> <script type="application/ld+json"> { "@context" : "http://schema.org", "@type" : "Article", "name" : "Optical Image Stabilization", "author" : { "@type" : "Person", "name" : "SGS" }, "datePublished" : "2021-05-02", "image" : "https://www.sgstechnologies.net/sites/default/files/2020-01/bg1_6.jpg", "articleSection" : "Do you travel a lot and capture photos from your mobile camera? Do you party hard and are the images you capture at the pub are always blurred? Are the wedding pictures that you took on your phone not of great quality? In the current scenario even though many folks are going for DSLR cameras many are still purchasing phones with better camera quality and with high mega pixel.", "articleBody" : "The reason is the smart phones today are quite handy, light weight and are excellent for multitasking. When someone buys a new smart phone, our friends do check the camera first with a selfie, isn�t it? So we all go for a better megapixel camera , don�t we?</P>\n\n<P>Today the latest smart phones come with multiple lenses, with flash support and high mega pixel for secondary lens too. So the question that instantly hits us is, does the pixel resolution only decide about the camera quality?<BR/>\nNo, it does not. We should also think about the Image stabilization. In a lot of instances in spite of having high mega pixel camera we could see that the images are not very clear. They might be due to shaky hands or moving objects. But we expect that to be handled by the high end camera mobile phones. If we expect that, then we should check for OIS (Optical Image Stabilization) in the camera specification of a smart phone from next time when you are looking out to buy one.</P>\n\n<P><STRONG>What is Optical Image Stabilization (OIS)?</STRONG></P>\n\n<P>Optical image stabilization, or OIS for short, earlier used to be a feature found solely on dedicated cameras and camcoders. For the past few years, as people have started expecting high end camera with smart phones, it has made its way into the cameras of dozens of smartphones. We could see this technology implemented today in Nokia Lumia(s) to Android models, and even in Apple�s iPhone.</P>\n\n<P>The sole purpose of OIS is to aid the photographer in taking smoother videos and blur-free images, especially in dim light. However, stabilization isn�t a fix for all types of blur. OIS can�t do anything if blur is caused by your subject moving too fast for your exposure to freeze the action; it only works to counter camera shake. Therefore it�s important to question whether the blurry images you want to fix are caused by camera movement, or other factors which would be best addressed by changing camera settings.</P>\n\n<P><STRONG>How is Optical Image Stabilization implemented in smart phones?</STRONG></P>\n\n<P>In this technique the image is stabilized by varying the optical path of the sensor. Since this is a real time compensation, there is no alteration or image degradation that takes place. The lens assembly is moved parallel to the image plane. To stabilize, shake detecting sensors or Gyro -sensors are used, which will transmit this information to a microcomputer which in turn converts them into the Drive signal and ultimately moves the lens assembly to correct the image project on the sensor before it is converted to digital format and thus off-sets your motion. This is the basic principle of all OIS techniques.</P>\n\n<P>Different companies have different names for their OIS Technology.PureView is by Nokia, Ultrapixelis by HTC, etc. The first cell phone optical stabilized sensor was built into Nokia Lumia 920 by Nokia. Following Nokia android smart phone manufacturers produced their phones with OIS technology and then apple also have implemented the same in the latest phones. OIS is more popular in consumer camera devices as it works efficiently even in poor lighting conditions and we won�t see degradation in image resolution as corrections are made prior to the signal conversion in digital format.Interestingly, the majority of smartphones use SoCs (System-on-a-Chip) based on the theARM architecture and often use CPU cores and GPU designs made by ARM. Likewise the design for the microcontrollers for OIS often come from ARM, this time not the Cortex-A range of CPUs, but the Cortex-M range of microcontrollers.", "url" : "https://www.sgstechnologies.net/blog/optical-image-stabilization", "publisher" : { "@type" : "Organization", "name" : "SGS Technologies" } } </script>