Nowadays, mobile phone photography is all about portrait mode, background blur, etc. Many mobile phone manufacturers use portraits and blurs as selling points to attract users. However, mobile phone virtualization is implemented using dual camera plus algorithm. Of course, there will inevitably be flaws.
In essence, the background is blurred because of the great contrast between the foreground and the background, coupled with the phenomenon of light diffraction, which leads to the phenomenon. The golden phrase in the photography world is 'bigger one', and the sentence is more direct. In other words, it is the 'equal aperture crushed to death'. The diagonal length of the full-frame camera is 43mm, and the average length of the diagonal of the mobile phone is between 7mm and the corresponding equivalent aperture is 43/7. Said that the same is 20 mm focal length, the same is the F / 2 aperture, full-frame camera aperture diameter more than 6 times, greater blur produced by the front and rear scene is even better.
But in reality, using a mobile phone can also remove the natural blurring effect, but this requires an object that can produce a strong contrast. When I shoot a small object, the lens is as close to the object as possible, and the background behind the object is as far away as possible. Can also cause high contrast, the photos will have a blurry taste, and the effect is more natural.
