5Meg, 8Meg, 12Meg high pixel camera is getting closer and closer to DSC. However, the high-pixel mobile phone camera does not contain some optical or mechanical parts of DSC. The lack of this hardware will undoubtedly make the camera phone's photo effect worse than DSC.
The introduction of image stabilizer technology can make the effect of high pixel camera closer to DSC. At present, the image stabilizer technology of our camera mainly adopts the following technologies: optical image stabilizer (OIS), one-sidedness of mobile CMOS core, anti-jitter of algorithm, JPEG transmission, high ISO and MIPI transmission. Among the listed technologies, we usually use algorithms to prevent hand jitter, JPEG transmission, high ISO and MIPI transmission. It is expected that OIS will be used in the future. Here are some common ways to prevent hand shaking.
1、OIS
Anti-shake through the lens group mainly relies on magnetic force to wrap the suspended lens, thus effectively overcoming the image blur caused by camera vibration, especially for digital cameras with large zoom lenses. Usually, when the gyroscope in the lens detects tiny movement, it will send a signal to the microprocessor to calculate the displacement that needs to be compensated immediately, and then compensate the lens group according to the shaking direction and displacement of the lens, thus effectively overcoming the image blur caused by camera vibration. The effect of optical anti-shake function is quite obvious. Generally speaking, turning on this function can improve the shutter speed of 2-3 gears, so that hand-held shooting will not be blurred. The effect is very obvious for beginners, and it is also immediate in telephoto digital cameras.
2, the algorithm to prevent hand trembling
Electronic anti-shake technology uses dynamic vectors in jitter detection. According to the dynamic vector, grasp the swing direction and amount of the image, and move the image position in parallel based on this, so as to generate a jitter-free dynamic image.
3. High ISO anti-shake
At present, APTINA, OVT, Fujitsu and NEC all adopt high ISO methods to prevent hand shaking. This anti-shake effect has an impact on the image, that is, it introduces some noise, but it is the cheapest image stabilization method and easy to realize.