Figure 4

(Color online) (a) Observation results of imaging plate—the original image. (b) Original image coupled with the contour line. (c) Procedure of quantitative data process. (d) Photon number distribution images of quantitative and 5-\(\upmu \)m-space-resolving 8 keV self-emission of hotspot. (e) Photon number distribution images coupled with the contour line. The red line is the 17.81% contour.