Mobile phone camera anti-shake technology detailed

Smartphone pixels for 5Meg, 8Meg, and 12Meg high-pixel cameras are getting closer and closer to DSC. But high-pixel phone cameras don't contain some optical or mechanical parts of the DSC. This lack of hardware will undoubtedly make the camera phone's photo effect worse than the DSC.

The introduction of anti-shake technology can make the effect of high-pixel camera closer to DSC. Now our camera's anti-shake technology mainly uses the following: OpTIcal Image Stabilizer (OIS), mobile CMOS chip surface, algorithm anti-shake, JPEG transmission, High-ISO, MIPI transmission. Among the listed technologies, we use algorithmic anti-shake, JPEG transmission, High-ISO, MIPI transmission at this stage. OIS is expected to be used in the future. The following is a description of several commonly used methods of anti-shake.

1, OIS

The anti-shake through the lens group mainly relies on the magnetically wrapped suspension lens, thereby effectively overcoming the image blur caused by the camera vibration, which is more effective for the digital camera of the large zoom lens. Usually, the gyroscope in the lens detects a small movement, and transmits the signal to the microprocessor to immediately calculate the amount of displacement to be compensated, and then compensates the lens group to compensate according to the lens's shaking direction and displacement amount, thereby effectively Overcoming the blurring of the image caused by the vibration of the camera. The effect of the optical image stabilization function is quite obvious. Under normal circumstances, turning on this function can increase the shutter speed of 2-3 speeds, so that the hand-held shooting will not be blurred, which is very obvious for beginners. In telephoto digital cameras, the effect is immediate.

2, the algorithm is anti-hand shake

Electronic anti-shake technology utilizes dynamic vectors for jitter detection. According to the motion vector, the swing direction and the swing amount of the image are grasped, and the image position is moved in parallel with reference to generate a jitter-free dynamic image.

3, High-ISO anti-hand shake

Now APTINA, OVT, FUJITSU, and NEC all use the High-ISO method to prevent hand shake. This anti-shake effect has an effect on the image, which is to introduce a certain noise, but this is the cheapest anti-shake. The way is easy to implement.

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