写出下列代码的注释,解释功能 readimage(C:\pic\7\project1.bmp,image1); showimage(image1); convertdepth24to8(image1,image0); thresholdcovert(image0,image2,fixthreshold,100); imageproject2(image2,image3,hproject,100,c,d,count2); imageproject2(image2,image4,vproject,100,c,d,count2); showimage(image3); showimage(image4);