Evaluation of the Focusing Algorithm
- There are many companies in the market that claim to be able to do autofocus cameras. We exclude fake plagiarism, counterfeit stuff. Just talk about companies that have their own development capabilities and have their own algorithms to make an evaluation of the autofocus of these products. To evaluate autofocus, you should refer to the following aspects:
- Speed. This is not absolute, and the speed is not very good. Fast speed does not mean that this product is good. One-sided pursuit of speed, ignoring the user's experience is not feasible. For example, the speed is fast, but the phenomenon of "breathing" is very serious. Is this really good? Speed is also related to the motor, such as liquid lens, voice coil motor, and stepper motor, which are not of the same order of magnitude. The latter is much slower. It is like a snail crawling step by step, while the liquid lens and voice coil motor are like a moving car, and it is direct. If you don't choose a liquid lens or a voice coil motor, please compare the price of the snail and the motor car. Even if you are using a stepper motor, you have to look at the itinerary, run 100 meters and run 1000m. It is estimated that you will run 100m faster than running one kilometer. Even if the target distance is 1000m, running and walking are different. Stepper motor has a step accuracy problem. In short, Buoth autofocus technology is the world leader with a wide range of industrial cameras.
- Accuracy. No one can guarantee 100% focus accuracy, even active focus (ranging), not to mention passive focus is based on high frequency signals. You have to have the edge, like the smooth surface of glass, wall, that is no way for the gods. In most cases, fast and accurate focus is guaranteed. Focusing light conditions are more dependent. Focusing becomes particularly difficult due to noise interference in low light conditions. A good focus algorithm is to ensure that in extreme cases. Eliminate all odds, obtain effective signals under weak signals, and ensure accurate focus. That is really powerful! No overshoot or breathing phenomenon. That is, the focus is not repeated, back and forth, twisting and pinching. One step in place, just like the help of God. The poor focus algorithm will find a clear point, and then repeatedly confirm the focus, forming multiple focus. This will make people feel silly, not smart, uncomfortable. The whole process of focusing is from fuzzy to clear, to fuzzy, clearer and then fuzzier to clear, is a process of repeated confirmation. Through years of technical accumulation, the Buoth factory has achieved the highest level of international companies in these details.
- Intelligent. In general, the auto focus mode is AF-C, that is, continuous autofocus mode. After focusing on the target object, do I have to refocus? The answer is NO. If the image is clear, you can take a break and do nothing. If it is not clear, then refocus, is it smart? If it is a zoom camera, intelligence is also reflected in the zoom tracking. This is a new technology that has been broken in recent years. The program automatically adjusts the focal plane according to the change of focal length, so that the image is always clear during the zooming process, just like the par focalizing in the zoom microscope. Is it very smart?