WORD and INT both refer to 16 bit data. WORD usually focuses on the length of data storage area and signature data, which is only 16 bits long. INT focuses on integer data types (unsigned).

In PLC, it refers to the type of 16 bit data, but it can be 32 bits in C language.

2. The storage address length is different.

DW is a description of the address length of double-word storage, which can store 32-bit data, that is, the length of double-word data storage area.

3. The signals are different.

DI is the address definition of the double-word input signal buffer. Different from DW, DW defines the data length of the program memory cache area, which belongs to the internal public storage area of PLC.

DI is the input signal buffer, which belongs to the storage area of local specific function.

Extended data:

Fuzzy operation is a neighborhood-based image smoothing method.

When the image noise is only a small part of the image, the new pixel obtained by transforming the neighborhood of a pixel can reduce the influence of noise, thus smoothing the noise well.

Mean filtering is the arithmetic average sum of the neighborhood of the central point, and median filtering is the median of the neighborhood of the central point.

This paper mainly studies Gaussian filtering. Gaussian filtering can be regarded as an improvement of mean filtering.

Take the 33rd block as an example. Mean filtering is to calculate the average of 9 numbers, and Gaussian filtering is to calculate the weighted average of 9 numbers. The central idea is that each point in the neighborhood is different from the central point.

It should be different from the general filtering, and the closer to the center, the greater the weight. The weight of each point is Gaussian distribution.