Google launched mobile health AI, cut off the money for chea

2021-03-05

As we all know, thanks to technological progress and the reduction in the cost of related components, the richness of functions of smart bracelet products is no longer what it used to be. For example, many smart bracelets now have a touch screen of more than 1 inch, and even have an appearance similar to that of a smart watch; for example, many entry-level smart bracelets of two to three hundred yuan are now available. Equipped with continuous monitoring capabilities of heart rate and blood oxygen. In addition, some products can also provide functions such as exercise tracking, GPS positioning, and ECG measurement.

Google launched mobile health AI

Basically, in addition to the fact that users cannot install software for expansion, many smart bracelets today may have caught up with the level of smart watches in terms of performance and practicality. But the question is, do we really need smart bracelets or smart watches for most people?

Some friends may say, “Indeed, I don’t have the habit of regular exercise. I also know that I just want to chase the limelight when I buy bracelets and watches. In fact, there is not much practical value, but sometimes I do. I want to check my heart rate occasionally. Besides, compared to heart rate wristbands that can be bought for a few hundred yuan, aren’t those phones with heart rate monitors much more expensive?"

If you put it in the past, this is indeed the case. But within a few weeks or months at the earliest, "heart rate measurement" may become one of the lowest cost features on smartphones. Because Google once again used their AI technology to bring changes to smart phone products.

Google launched mobile health AI

Recently, Google's Google Health application held a press conference. In this event, they predicted two major functions that will be launched on smartphones through application updates in the future. One is to use the front camera to measure the user's breathing rate, and the other is to use the rear camera to measure the user's heart rate.

Google launched mobile health AI

Of course, both of these functions rely on Google's newly developed AI algorithm. According to Jack Po, the product manager of Google Health, at the press conference, they noticed that doctors would calculate the respiratory rate by observing the patient's chest fluctuations, so they used AI technology to reproduce this process. Through the front camera, the smart phone can capture the subtle changes in the user's chest or face when breathing, and then can clearly calculate the breathing rate. And the current AI model has been able to achieve nearly 100% accuracy-regardless of whether the subject is healthy or not, their average number of breaths within a minute can be measured by the front camera.

The principle of measuring heart rate through the rear camera is actually not much different from the common optical heart rate meter. This is because the traditional optical heart rate monitor is essentially a camera, but it emits strong penetrating light to the skin, and then uses the camera to capture the reflected light signal from the blood vessels through the skin to detect the heart rate.

Google launched mobile health AI

But in fact, the resolution of the main rear camera of mainstream smartphones is much higher than the "camera" in the heart rate monitor, and most of the cameras themselves can actually capture infrared light. Therefore, Google’s approach is to allow users to directly stick their fingers to the rear camera of the phone, and the camera captures the infrared signal emitted by the finger. At this time, the AI ​​algorithm is used to process and amplify the signal, and the blood vessels contained in it can be identified Beat the rhythm, and then measure the heart rate.

According to Jinening Zhan, the technical director of Google Health, at the press conference, they have conducted rigorous tests on these new AI algorithms. The results show that no additional heart rate sensor is needed, and only the AI ​​+ rear camera is required. The accuracy of the measured heart rate has reached 98%.

Google launched mobile health AI

What does this mean? Google believes that the current breathing and heart rate measurement technology implemented by camera + AI has not completely passed the strict medical technical testing, but they have demonstrated almost the same performance level as the hospital's clinical medical equipment. Therefore, for those consumers who do not want to buy a bracelet, but do want to check their heart rate and breathing from time to time, Google's AI technology has been able to meet their needs.

With the disclosure of this technology, even smart phone products with a slightly lower positioning may achieve quite accurate heart rate detection in the future. In other words, it may significantly reduce the potential demand for entry-level smart bracelets, but at the same time it may also reduce consumers' actual expenses.