绘制实时曲线,显示横纵坐标，及鼠标所在处的坐标值-Draw real-time curve, showing horizontal and vertical coordinates, and the coordinates of the mouse at

描点器，载入图片并显示，可以用鼠标在图片上描点然后导出坐标，导出格式为json格式- 描点器，载入图片并显示，可以用鼠标在图片上描点然后导出坐标，导出格式为json格式 Point device, loading the image and display, you can use the mouse to draw points in the picture and then export the coordinates, the export format for the J