matlab图像处理基础知识2（matlab位运算操作）

需求说明：FPGA图像处理前期算法验证

当前状态：已通过matlab验证

来自：http://www.yiibai.com/matlab/matlab_bitwise_operators.html

MATLAB提供位运算，如'位'，'位或'和'位不操作，移位操作等各种函数

以下的表格显示了常用的按位运算：

函数	目的/作用
bitand(a, b)	Bit-wise AND of integers a and b
bitcmp(a)	Bit-wise complement of a
bitget(a,pos)	Get bit at specified position pos, in the integer array a
bitor(a, b)	Bit-wise OR of integers a and b
bitset(a, pos)	Set bit at specific location pos of a
bitshift(a, k)	Returns a shifted to the left by k bits, equivalent to multiplying by 2k. Negative values of k correspond to shifting bits right or dividing by 2|k| and rounding to the nearest integer towards negative infinite. Any overflow bits are truncated.
bitxor(a, b)	Bit-wise XOR of integers a and b
swapbytes	Swap byte ordering

例子

创建一个脚本文件，并键入下面的代码：

a = 60; % 60 = 0011 1100
b = 13; % 13 = 0000 1101
c = bitand(a, b)      % 12 = 0000 1100
c = bitor(a, b)       % 61 = 0011 1101
c = bitxor(a, b)      % 49 = 0011 0001
c = bitshift(a, 2)    % 240 = 1111 0000 */
c = bitshift(a,-2)    % 15 = 0000 1111 */

当运行该文件，它会显示以下结果：

c =
12
c =
61
c =
49
c =
240
c =
15

整理来自：时间的诗