Do you know what is image stabilization (what is image stabilization in-camera) and how it works? If yes then it is a good thing and if not then this article is for you? We know that sometimes when we are clicking a photo, it becomes a bit blur or blurry. The clicked pictures don’t appears good and it hurts our hearts a lot.
But what should we do, we are an honest human being and humans make mistakes. Have you ever thought that despite something like this happening in mobile, Picture comes clear? How does the technology behind it work? If you want to get complete information about all this, then this article is Image Stabilization and how it works. Because today I am going to tell you about this topic. Let’s start.
What is Image Stabilization
Image Stabilization (IS) This is a method with which we can correct the habit of taking blurry pictures to a great extent. In this method, Camera Lens moves automatically to adjust the camera movement so that we get a very clear picture. There are many reasons for these camera movements. These are such as if someone takes a camera in their hands or takes a photo.
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Nowadays there is a lot of discussion of optical image stabilization wherever you look. This has become such a feature in Smart Phone that everyone wants to get it on their phone. Its connection resembles very much with the feature of a camera. One thing is absolutely right that we can use this feature and take a very beautiful photo. If we talk about the Image Stabilization Technique, then there are mainly two types. First is Electronic Image Stabilization (EIS) and second is Optical Image Stabilization (OIS).
What is optical image stabilization
The work that this optical image stabilization mainly does is to reduce the blurry images. Blurry images are mainly produced by the user’s hand movement or the movement of the camera. We will all agree that Blurry Images is not liked by any of us. Optical Image Stabilization (OIS) has a huge hand in solving this smile.
With the help of this technique we can save our Camera Motion from moving to some extent. But if our camera moves violently then it will not help us. Because it can stabilize the vibrations to some extent. Must remember one thing that this technique does not improve the image’s blurriness.
- This is a straightforward technique.
- There is no need for image processing in this either.
- It does not crop frames.
- The camera module is very large.
- It is very expensive.
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Electronic Image Stabilization
This electronic image stabilization method is totally different, in which the problem is solved in the Programming Level itself when the optical signal has been changed to Digital Signal. All Camera also called Charged Coupled Device (CCD) live CCDs are Mezhud which is an Array of many Light Sensors and which are arranged in a Grid.
In this technique, the processor divides the image into small pieces and then compares them with the previous frame. This shows that the motion that was taken was born from the moving object or from an unwanted Shake and it makes corrections accordingly. Now when you shift an image, to fill it up For this you need a large CCD or we have to give some area of existing CCD so that it can capture the image for Off-Screen Purpose. There is also a possibility of the image getting bad, but if your camera has more resolution then it will not make much difference.
EIS is the advantage
- The camera module is very small.
- It is not very expensive.
EIS is dis-advantage
- It requires Frame Cropping.
- Here the resolution decreases slightly.
How does OIS work
The method of working of OIS is very simple, to stabilize the image, the optical path of the sensor has to be changed. These are real-time compensation so that there is no alteration and no image degradation. In this, the Lens assembly is moved parallel to Image Plane. Here the Shake detecting sensor (Gyro Sensors) is used, which sends the information to the Microcomputer so that they convert it into a Drive Signal which finally moves the Lens Assembly so that the image can be projected to the correct location ie the Sensor. Also before being converted to digital format so that it can set your motion off. This is the basic principle of OIS.
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Multi-Frames Digital Image Stabilization
If we talk about video recording, both OIS and EIS works according to the real-time image stabilization mechanism. To do this, we have to see both what happened before and after the frame. EIS works by taking note of the motion of the current frame and the previous frame (Backwards in time). But in some techniques, video can be stabilized by looking at both the forward frame (next frame) and backward frame (previous frame). To do this, they have to analyze many frames in both directions.
As such our main objective is how to stabilize the video by placing the camera in the virtual plane. Along with that, looking at ½ second instead of 1/15 second of the footage, it can make a huge difference especially when the direction of motion change between the same interval.
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MF DIS advantage
- Can handle larger image movements, compared to OIS and EIS.
MF DIS is dis-advantage
- It requires a lot of computing capacities for processing real-time video.
Difference between Digital and Optical Image Stabilization
We are talking about optical image stabilization (OIS). Let me tell you that there are cameras or lens sensors in it and sense motion moves the optical part of the camera in the opposite direction. That sensor recognizes any activity such as breathing or heartbeat. A small motor like instruments provides motion in the opposite direction, with the help of which the camera points to point similar to optical path physical scene.
But in Digital Image Stabilization (DIS), the thing is different in that the Pixels of Sensor or camera’s focal plane are used to sense when things are moving and then it adjusts the pixel from the cone to the exposure. Do the work of collecting light. All these things are done by Computer Chip which is inside the Camera. For this reason, more “extra” pixels in the camera should be on the sides of the focal plane so that it can accommodate motion.
Why OIS is better than EIS
The main advantage that OIS possesses is that there is no image degradation at all. It is because whatever compensation you have to do here is done before reaching the optical signal CCD. But here, a little more hardware is required to do the mechanical motion. It also puts pressure on the battery but the weight of the device does not increase.
EIS is much cheaper and lighter weight than OIS. Image degradation is reduced to a great extent due to the better algorithm here. But if used in low light, then OIS is much better than EIS because of no image degradation.
I sincerely hope that you could get complete information about what is Image Stabilization. It is a request to all of you readers that you too should share this information in your neighborhood, relatives, and friends so that our awareness will be there and it will benefit everyone.
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It has always been my endeavor that I always help my readers or readers from all sides. If you people have any doubt of any kind, then you can ask me irresponsibly. I will definitely try to solve those Doubts. Tell us by writing a comment about what is Image Stabilization is and how it works so that we too have a chance to learn from your ideas and improve something.