bwboundaries 这个函数。N,A干嘛用的求高手解答。翻译不过去了

风雨湖南路

%BWBOUNDARIES Trace region boundaries in binary image.

查找二进制图片的边界

%   B = BWBOUNDARIES(BW) traces the exterior boundary of objects, as well

%   as boundaries of holes inside these objects. It also descends into the

%   outermost objects (parents) and traces their children (objects

%   completely enclosed by the parents).

Bw=BWOUNDARIES 查找图片及内部空洞的边界。同样会由父图片遗传到子图片（子图片指完全被父图片包围）中。

BW must be a binary image where

%   nonzero pixels belong to an object and 0-pixels constitute the background. B is a P-by-%   1 cell array, where P is the number of objects

BW适用于背景像素值为0，目标是由非零像素组成的二进制图片。B是一个大小为P*1的元胞数组，P指的是目标和空洞的数量。

%   and holes. Each cell contains a Q-by-2 matrix, where Q is the number of

%   boundary pixels for the corresponding region. Each row of these Q-by-2

%   matrices contains the row and column coordinates of a boundary pixel.

每个元胞包含Q*2大小的矩阵，Q是相应目标边界的像素的个数（如果像素边长为1，Q就是指周长）。Q*2矩阵内的每一行包含边界像素点的行、列坐标。这个坐标是按顺时针方向存放的。

%   The coordinates are ordered in a clockwise direction.

%

%   B = BWBOUNDARIES(BW,CONN) specifies the connectivity to use when

%   tracing parent and child boundaries. CONN may be either 8 or 4. The

%   default value for CONN is 8.

%B=BWBOUNDARIES(BW,CONN)指定连通用于查找父图片和子图片的边界时。CONN可以是8或者4，默认值为8

%   B = BWBOUNDARIES(...,OPTIONS) provides an optional string input. String

%   'noholes' speeds up the operation of the algorithm by having it search

%   only for object (parent and child) boundaries.  By default, or when

%   'holes' string is specified, the algorithm searches for both object and

%   hole boundaries.

%   B = BWBOUNDARIES(...,OPTIONS) 提供一个可选配的字符输入用于控制算法。

  'noholes'的算法只计算目标的边界从而提升运算速度。  'holes' 计算目标和空洞的边界。

%   [B,L] = BWBOUNDARIES(...) returns the label matrix, L, as the second

%   output argument. Objects and holes are labeled. L is a two-dimensional

%   array of nonnegative integers that represent contiguous regions. The

%   k-th region includes all elements in L that have value k. The number of

%   objects and holes represented by L is equal to max(L(:)). The

%   zero-valued elements of L make up the background.

%  [B,L] = BWBOUNDARIES(...)L是代表连通区域的一个二维、非负、整数数组。 第K个区域包含在L中所有的值等于K的元素。目标和空洞的数量等于max(L(:))。L中的背景值等于0.

%   [B,L,N,A] = BWBOUNDARIES(...) returns the number of objects found

(N)

%   and an adjacency matrix A. The first N cells in B are object

%   boundaries. A represents the parent-child-hole dependencies. A is a

%   square, sparse, logical matrix with side of length max(L(:)), whose

%   rows and columns correspond to the position of boundaries stored in B.    [B,L,N,A] = BWBOUNDARIES(...)

%   The boundaries enclosed by a B{m} as well as the boundary enclosing

%   B{m} can both be found using A as follows:

%

%      enclosing_boundary  = find(A(m,:));

%      enclosed_boundaries = find(A(:,m));

看不懂如何破！

%   Class Support

%   -------------

%   BW can be logical or numeric and it must be real, 2-D, and nonsparse.

%   L, and N are double. A is sparse logical.

BW可以是逻辑型，数值型？，但必须是实数，2—D,非稀疏矩阵

Aires

请注意提问请在免积分提问专区提问

风雨湖南路

Aires 发表于 2014-4-25 09:59
请注意提问请在免积分提问专区提问

额，，，第一次发帖，也不知道注意什么，谢谢提醒！