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How the OIS Optical Image Stabilizer Works in Smart Phone Cameras
How the OIS Optical Image Stabilizer works in smart phone cameras
When new smartphones are detected, companies always focus on the camera and its specifications with the repetition of the OIS term, an abbreviation for Optical Image Stabilization, the optical image stabilizer.
The use of the image stabilizer has become very necessary and no company will abandon it in any way. The installer may also be digital or electronic.
If we look at the Google Pixel specification sheet, we will not find an optical fixator for the OIS image, which is because the company has moved to use the EIS electronic installer. On iPhone phones, for example, the optical fixer is present just like the Samsung Galaxy S.
Apart from the difference between the types of stabilizers, the function is clear from the name, which is the installation of the image during the capture to prevent it from appearing in a rough or unclear because of vibration. Technically, during the time that the lens is opened and closed to capture the light and shoot the scene, the user's hand should not vibrate. Otherwise, faulty information will reach the light sensor, which will result in images with a layer of stupidity.
The previous section shows a review by Google of the importance of using the optical installer of any kind, and this shows the importance of his presence to get videos or photos with the highest accuracy possible.
The mechanism of action is done through a small unit that combines the camera with a small electric motor, in addition to the sensors of the movement of the device. When you press the shutter button, the unit begins by reading the movement of the device on the horizontal and vertical axis to monitor any sudden vibration or movement that activates the role of the electric motor in the event that it occurs.
If the user presses the camera button and then moves the phone to the right, the motion sensors will send this change to the unit which in turn activates the engine to pull the camera in the opposite direction, ie to the left, so the lens looks like it did not move. The same is repeated if the user clicks the video recording button and then moves the device as if running. The electric motor will always try to pull the lens in the opposite direction of the user's motion to install the images as much as possible.
This mechanism is used in OIS optical stabilizers, which means that the space for the camera lens should be a bit large to provide enough space for movement. This explains the presence in some camera.
In phones that rely on electronic or digital sensors, the same process is almost repeated, but the movement is within the lens that tries to capture the same points and not to move to points again, which proved its worth over time, and perhaps what Google did in pixels phones the most prominent example of the effectiveness This principle