/*?sample.c
/*
/*?The?enclosed?function?reads?in?a?one-byte/pixel?unsigned?char?image?*/
/*?with?filename?in?variable?fn?and?of?size?xsize*ysize??*/?
/*?the?array?data?is?declared?with?the?statement:????*/?
/*?data=（unsigned?char*）calloc（xsize*ysize?sizeof（char））;*/?
/*?upon?exiting?cdatainput?data?will?contain?the?input?image?*/?

#include?
int?main（）
{
?int?xsizeysize;
?int?ijmn;
?unsigned?char?data[256][256];
?unsigned?char?data2[128][128];
?FILE?*mri_in2?*mri_out2;
?unsigned?char?pixel;
?xsize=255;
?ysize=255;

?mri_in2=fopen（“mri““r“）;???/*?open?and?read?image*/
?for?（i=0;?i<=xsize;i++）
???{
?????for?（j=0;j<=ysize;j++）
???????{
	?fread（&pixelsizeof（char）1mri_in2）;
	?data[i][j]=pixel;
???????}
???}
?fclose（mri_in2）;

?for?（i=0m=0;?i<=xsize;i=i+2m++）????/*?make?ij?select?one?pixel?escape?one?so?the?size?will?be?reduced?*/?
???{
?????for?（j=0n=0;?j<=ysize;j=j+2n++）
???????{
	?data2[m][n]=data[i][j];????
	?
???????}
?????
???}

?mri_out2=fopen（“out2““wb“）;??????/*?generate?a?new?image?*/
?fwrite（data2sizeof（char）sizeof（data2）mri_out2）;
?fclose（mri_out2）;
?return（0）;
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????1117??2013-02-18?14:10??image?shrink\image?shrink.c

?????目錄??????????0??2013-03-02?15:08??image?shrink

-----------?---------??----------?-----??----

?????????????????1117????????????????????2