1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
<HTML>
<HEAD>
<TITLE>signature - Methods to Compute a Digital Signature for an Image</TITLE>
<LINK REV="made" HREF="mailto:magick@wizards.dupont.com">
</HEAD>
<body background="../../images/background.gif">
<!-- INDEX BEGIN -->
<UL>
<LI><A HREF="#NAME">NAME</A>
<LI><A HREF="#SYNOPSIS">SYNOPSIS</A>
<LI><A HREF="#FUNCTION_DESCRIPTIONS">FUNCTION DESCRIPTIONS</A>
<UL>
<LI><A HREF="#SignatureImage">SignatureImage</A>
</UL>
</UL>
<!-- INDEX END -->
<HR>
<P>
<H1><A NAME="NAME">NAME</A></H1>
<P>
signature - Methods to Compute a Digital Signature for an Image
<P>
<HR>
<H1><A NAME="SYNOPSIS">SYNOPSIS</A></H1>
<P>
<PRE> B<SignatureImage>(image)
</PRE>
<P>
<HR>
<H1><A NAME="FUNCTION_DESCRIPTIONS">FUNCTION DESCRIPTIONS</A></H1>
<P>
<HR>
<H2><A NAME="SignatureImage">SignatureImage</A></H2>
<P>
Method SignatureImage computes a digital signature from an image. This signature uniquely identifies the image and is convenient for determining if the colormap of a sequence of images is identical when animating. The digital signature is from
<FONT SIZE=-1>RSA</FONT> Data Security
<FONT SIZE=-1>MD5</FONT> Digest Algorithm described in Internet draft
<FONT SIZE=-1>[MD5],</FONT> July 1992.
<P>
The format of the SignatureImage method is:
<blockquote>SignatureImage (image) </blockquote>
<P>
<FONT SIZE=-1>A</FONT> description of each parameter follows:
<DL><DL>
<DT><STRONG><A NAME="item_o">image:</A></STRONG><DD>
<P>
The address of a structure of type Image.
</DL></DL>
</BODY>
</HTML>
|
