function?B?=?bound2im（b?M?N?x0?y0）

[np?nc]?=?size（b）;
if?np????b?=?b‘;?%?To?convert?to?size?np-by-2.
???[np?nc]?=?size（b）;
end
?
%?Make?sure?the?coordinates?are?integers.
x?=?round（b（:?1））;?
y?=?round（b（:?2））;
?
%?Set?up?the?default?size?parameters.?
x?=?x?-?min（x）?+?1;
y?=?y?-?min（y）?+?1;
B?=?false（max（x）?max（y））;
C?=?max（x）?-?min（x）?+?1;
D?=?max（y）?-?min（y）?+?1;
?
if?nargin?==?1??
???%?Use?the?preceding?default?values.
elseif?nargin?==?3
???if?C?>?M?|?D?>?N
??????error（‘The?boundary?is?outside?the?M-by-N?region.‘）
???end
???%?The?image?size?will?be?M-by-N.?Set?up?the?parameters?for?this.
???B?=?false（M?N）;
???%?Distribute?extra?rows?approx.?even?between?top?and?bottom.
???NR?=?round（（M?-?C）/2）;?
???NC?=?round（（N?-?D）/2）;?%?The?same?for?columns.
???x?=?x?+?NR;?%?Offset?the?boundary?to?new?position.
???y?=?y?+?NC;??
elseif?nargin?==?5
???if?x0???????error（‘x0?and?y0?must?be?positive?integers.‘）
???end
???x?=?x?+?round（x0）?-?1;
???y?=?y?+?round（y0）?-?1;
???C?=?C?+?x0?-?1;
???D?=?D?+?y0?-?1;
???if?C?>?M?|?D?>?N
??????error（‘The?shifted?boundary?is?outside?the?M-by-N?region.‘）
???end
???B?=?false（M?N）;
else
???error（‘Incorrect?number?of?inputs.‘）?
end
?
B（sub2ind（size（B）?x?y））?=?true;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????242177??2017-12-25?19:52??上交\報告.docx

?????文件???????4025??2017-12-03?18:19??上交\源程序\a0.png

?????文件???????2465??2017-12-03?18:19??上交\源程序\b0.png

?????文件???????1286??2017-11-18?19:07??上交\源程序\bound2im.m

?????文件???????2563??2017-12-03?18:19??上交\源程序\c0.png

?????文件???????4999??2017-12-03?10:21??上交\源程序\ceshi1.png

?????文件??????13954??2017-12-03?10:39??上交\源程序\ceshi2.png

?????文件????????195??2017-12-02?20:13??上交\源程序\dist.m

?????文件????????437??2017-12-03?00:55??上交\源程序\frdescp.m

?????文件????????492??2017-11-19?21:10??上交\源程序\ifrdescp.m

?????文件????????622??2017-12-03?01:12??上交\源程序\normalfrd.m

?????文件???????5446??2017-12-03?12:32??上交\源程序\pingyi.png

?????文件???????8910??2017-12-03?12:32??上交\源程序\shensuo.png

?????文件????????745??2017-12-03?18:20??上交\源程序\test1.m

?????文件????????953??2017-12-03?18:25??上交\源程序\test2.m

?????文件????????345??2017-12-03?18:24??上交\源程序\test3.m

?????文件??????14451??2017-12-03?12:32??上交\源程序\xuanzhuan.png

?????文件???????4025??2017-12-03?12:32??上交\源程序\yuantu.png

?????目錄??????????0??2017-12-03?18:27??上交\源程序

?????目錄??????????0??2018-05-15?19:48??上交

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

???????????????308090????????????????????20