function?[IMG]?=?imresize_bilinear（img?scale）
????[height?width?channel]?=?size（img）;
????%?既可以按比例縮放?又可以規(guī)定height和width
	[size1?size2]?=?size（scale）;
	if?size2?==?2
		scale1?=?scale（1?1）?/?height;
		scale2?=?scale（1?2）?/?width;
	else
		scale1?=?scale;
		scale2?=?scale;
	end
????%?計(jì)算新的?height?width
	new_height?=?floor（height?*?scale1）;
	new_width?=?floor（width?*?scale2）;
????%?計(jì)算新的?scale
????scale1?=?new_height?/?height;
????scale2?=?new_width?/?width;
????IMG?=?uint8（zeros（new_height?new_width?channel））;
????uu?=?double（zeros（new_height?4））;
????vv?=?double（zeros（new_width?4））;
????map_height?=?uint32（zeros（new_height?4））;
????map_width?=?uint32（zeros（new_width?4））;
????B?=?double（zeros（4?4））;
????A?=?double（zeros（1?4））;
????C?=?double（zeros（4?1））;
????%?計(jì)算new_height上每個(gè)點(diǎn)的對(duì)應(yīng)數(shù)據(jù)
????for?i?=?1:new_height
????????i0?=?（i?-?1）?/?scale1?+?1;
????????i1?=?floor（i0）;
????????u?=?i0?-?i1;
????????uu（i?1）?=?4?-?8*abs（u+1）?+?5*abs（u+1）^2?-?abs（u+1）^3;
????????uu（i?2）?=?1?-?2*abs（u）^2?+?abs（u）^3;
????????uu（i?3）?=?1?-?2*abs（u-1）^2?+?abs（u-1）^3;
????????uu（i?4）?=?4?-?8*abs（u-2）?+?5*abs（u-2）^2?-?abs（u-2）^3;
????????for?k?=?i1-1:i1+2
????????????map_height（i?k?-?i1?+?2）?=?max（1?k）;
????????????map_height（i?k?-?i1?+?2）?=?min（map_height（i?k?-?i1?+?2）?height）;
????????end
????end
????%?計(jì)算new_width上每個(gè)點(diǎn)的對(duì)應(yīng)數(shù)據(jù)
????for?j?=?1:new_width
????????j0?=?（j?-?1）?/?scale2?+?1;
????????j1?=?floor（j0）;
????????v?=?j0?-?j1;
????????vv（j?1）?=?4?-?8*abs（v+1）?+?5*abs（v+1）^2?-?abs（v+1）^3;
????????vv（j?2）?=?1?-?2*abs（v）^2?+?abs（v）^3;
????????vv（j?3）?=?1?-?2*abs（v-1）^2?+?abs（v-1）^3;
????????vv（j?4）?=?4?-?8*abs（v-2）?+?5*abs（v-2）^2?-?abs（v-2）^3;
????????for?k?=?j1-1:j1+2
????????????map_width（j?k?-?j1?+?2）?=?max（1?k）;
????????????map_width（j?k?-?j1?+?2）?=?min（map_width（j?k?-?j1?+?2）?width）;
????????end
????end
????%?計(jì)算新的?IMG
	for?i?=?1:new_height
		for?j?=?1:new_width
????????????for?k?=?1:channel
????????????????%?計(jì)算矩陣B
????????????????for?i1?=?1:4
????????????????????for?j1?=?1:4
????????????????????????map_width（j?j1）;
????????????????????????B（i1?j1）?=?img（map_height（i?i1）?map_width（j?j1）?k）;
????????????????????end
????????????????end
????????????????for?i1?=?1:4
????????????????????A（1?i1）?=?uu（i?i1）;
????????????????end
????????????????for?j1?=?1:4
????????????????????C（j1?1）?=?vv（j?j1）;
????????????????end
????????????????IMG（i?j?k）?=?A?*?B?*?C;
????????????end
		end
????end
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????2564??2019-03-15?20:46??imresize_bicubic.m
?????文件????????2175??2019-03-11?15:49??imresize_bilinear.m
?????文件????????1312??2019-03-11?15:48??imresize_nearest.m