Highlight the Image Tag in SVG

This afternoon and evening are all debugging SCS visualization in the lab. The main time in the afternoon is debugging the character cloud. However, I feel that it has not improved, but it is still hard to see ~~

Adjust the lines in the power track diagram. After fine tuning, it looks a lot better.

Because it requires interaction between multiple regions, that is, highlighting and selection, the SVG image has been trying to highlight it. Later, a circle element is drawn in the image. The size is the same as that of the image, but it is not displayed at ordinary times. It is good to highlight the circle during interaction ~~

A lot of things are not done. Come on ~

Highlight the Image Tag in SVG