Grating data files describe pixels, that is, vertices. The file size has a considerable relationship with the resolution. The size of the grating file is equal to that of the drawing of the same format.
A vector data file describes a graphic unit, such as a straight line or a circle. The file size is only related to the number and complexity of the graphic unit, but has no direct relationship with the drawing format. You can directly use existing CAD software for editing. To convert a grating data file to a vector data file, the image recognition software must be used for processing. During the processing, the system first transfers the grating processing module to eliminate noise points in the grating image and refresh the old drawing. After editing, modifying, and searching for grating images, call the system's vectoring module to automatically convert the grating data into vector data. Then, the system uses the automatic recognition module to identify the circles, straight lines, arcs, and even English letters, numbers, and Chinese characters in the image.
It must be pointed out that today's vectoring technology is far from perfect. Vectoring images are more or less distorted. For example, a line segment is separated into multiple small lines, and the circle is separated into multiple arc segments to generate unnecessary intersections and breakpoints. Fortunately, vectoring software generally provides optional parameters, such as speckle size, Gap jump, and minimumarc threshold) and so on. By setting these parameters carefully, we can get available images within the range of City Planning accuracy permits and remove unnecessary spots on the drawings. Based on different software and different types of drawings, We can summarize several common parameters for normal use through practice.