-
dsakf
％ 文件名：randlsbget.m
％ 程序员:余波
％ 编写时间:2007.6.25
％ 函数功能: 本函数将完成提取隐秘于上的秘密信息
％ 输入格式举例:result=( scover.jpg ,56, secret.txt ,2001)
％ 参数说明:
％ output是信息隐藏后的图象
％ len_total是秘密信息的长度
％ goalfile是提取出的秘密信息文件
％ key是随机间隔函数的密钥
％ result是提取的信息
function result=randlsbget(output,len_total,goalfile,key)
ste_cover=imread(output)
ste_cover=double(ste_cover)
％ 判断嵌入信息量是否过大
[m,n]=size(ste_cover)
frr=fopen(goalfile, a )
％ p作为信息嵌入位计数器将信息序列写回文本文件
p=1
％ 调用随机间隔函数选取像素点
[row,col]=randinterval(ste_cover,len_toal,key)
for i=:len_toal
if bitand(ste_cover(row(i),col(i)),1)==1
fwrite(frr,1, bit1 )
result(p,1)
else
fwrite(frr,0, bit1 )
result(p,1)=0
end
if p==len_total
break
end
p=p+1
end
fclose(frr)
()
- 2007-06-28 16:08:04下载
- 积分：1
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声音数据采集部分实现数据采集功能,根据用户选择的采样频率和预设的采样时间来从声卡获得用户需要的数据。并且将采集到的数据及其频谱图以图形方式很直观的呈现于用户面前。
图像采集分析部分，读入图像后，根据选择，对其进行Linear Conformal、Affine、Projective、Polynomial、Piecewise Linear、Sinusoidal、Barrel、Pin Cushion变换(The whole system is divided into data collection and data analysis of two parts, with a friendly graphical interface to communicate with the user interaction.
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