首先将压制完成的压坯形貌图片用Photoshop软件打开，然后利用Photoshop软件里的直方图统计功能分别统计颗粒和容器的像素大小。通过颗粒所占的像素与容器像素的比值便可以确定压坯对应的相对密度。

First, open the pressed compact topography picture with Photoshop software, and then use the histogram statistics function in Photoshop software to separately count the pixel sizes of particles and containers. The relative density of the compact can be determined by the ratio of the pixels occupied by the particles to the pixels of the container.