Abstract: A modular air outlet assembly comprises at least two air outlet sub-modules and a housing connecting member, wherein each of the air outlet sub-modules have different functions and are matchingly engaged in a sealed manner, and the air outlet sub-modules comprise a front sub-module and a rear sub-module; the front sub-module comprises a front housing and a front functional component, and the front housing has a standard air inlet joint; the rear sub-module comprises a rear housing and a rear functional component, and the rear housing has a standard air outlet joint and a standard air duct opening joint. A modular approach is used to design the air outlet assembly, and the relative angle between the air outlet sub-modules can be adjusted by means of different housing connecting members to avoid installation limitations in vehicles, and the mold development cost and related costs are reduced.

Abstract: A size estimation method is used with a document camera to estimate an object size. The document camera includes a lens and an image sensor. The size estimation method includes the following steps. Firstly, an object distance between the lens and the object is detected. According to the object distance and a viewable angle of the lens, a shooting zone size is estimated. Then, the object is shot by the lens and the image sensor, thereby acquiring a digital image including an image of the object. Then, an effective pixel number corresponding to the object image is counted. Afterward, the size of the object is estimated according to the effective pixel number, a total pixel number of the image sensor and the shooting zone size.

Abstract: A size estimation method is used with a document camera to estimate an object size. The document camera includes a lens and an image sensor. The size estimation method includes the following steps. Firstly, an object distance between the lens and the object is detected. According to the object distance and a viewable angle of the lens, a shooting zone size is estimated. Then, the object is shot by the lens and the image sensor, thereby acquiring a digital image including an image of the object. Then, an effective pixel number corresponding to the object image is counted. Afterward, the size of the object is estimated according to the effective pixel number, a total pixel number of the image sensor and the shooting zone size.