The int function in Matlab is a built-in integer function, which is used to return the integer part of the input value. The syntax format of this function is int(x), where x can be a vector, matrix or scalar. The return value of this function is rounded to zero, that is, positive numbers are rounded directly, and negative numbers are directed to the largest integer with an absolute value of negative one. Therefore, the int function is usually used with the floor function or the ceil function to provide a more flexible rounding method.

In practical engineering application scenarios, int functions are often used for data processing or data conversion. In signal processing, the sampling value of digital signal has integer bits, and the floating-point sampling value can be converted into integer data by using int function. In addition, when converting between various integer numeric types, you can also use the int function, such as converting a single-precision floating-point type to an integer.

In addition, int function can also play an important role when pixel coordinates need to be explicitly converted. In image processing, pixel coordinates are usually expressed in floating-point format, but the actual image output can only be in integer form. Therefore, floating-point pixel coordinates can be converted into integer coordinates by int function, so as to realize accurate mapping of pixel coordinates. In the actual image processing process, it is very important to use int function to complete the transformation of pixel coordinates.