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zigzag扫描matlab,ZIGZAG扫描的MATLAB实现

下面给一个参照MPEG提供的方法：＝＝＝ function b=zigzag(a) % 这是参照 University of California 提供的 MPEG 源代码的基础上编制的。...下标从零开始，因为是从MPEG的C代码拷贝过来的 zigzag = [ 0, 1, 8, 16, 9, 2, 3, 10, … 17, 24, 32, 25, 18, 11, 4, 5, … 12, 19...29, 22, 15, 23, 30, 37, 44, 51, … 58, 59, 52, 45, 38, 31, 39, 46, … 53, 60, 61, 54, 47, 55, 62, 63]; zigzag...= zigzag + 1; % 下标加1，符合MATLAB的下标习惯 aa = reshape(a,1,64); % 将输入块变成1×64的向量 b = aa(zigzag); % 对 aa 按照查表方式取元素...b=zigzag(a) b = Columns 1 through 12 64 9 2 3 55 17 40 47 54 61 60

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Leetcode ZigZag Conversion

题目： The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (...if res[j][i]: res_str+=res[j][i] return res_str 参考解法：ZigZag

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Leetcode: ZigZag Conversion

题目： The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (

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【leetcode】Zigzag Conversion

Question ： The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like...j][k]; } return ret; } }; 参考推荐： pay pal interview question [LeetCode] Zigzag...Conversion [LeetCode] ZigZag Conversion

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leetcode 6 ZigZag Conversion

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you

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LeetCode 6 ZigZag Conversion

题目算模拟题吧 class Solution { public: char a[1000][1000]; int tag[1000][1000...

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整数编码之 ZigZag

ZigZag 对于int值1，-1，20151103，均是用4 Bytes来表示： 1=[00000001]−1=[ffffffff]20151103=[01337b3f]1=[00000001]−1=...编码首先，ZigZag按绝对值升序排列，将整数hash成递增的32位bit流，其hash函数为h(n) = (n > 31)；对应地long类型（64位）的hash函数为(n...拿到hash值后，想当然的编码策略：直接去掉hash值的前导0之后的byte作为压缩编码。但是，为什么ZigZag(64)=8001呢？...因此，为了保证编码的唯一可译性，需要对hash值进行前缀码编码，ZigZag采用了如下策略： input: int n output: byte[] buf loop if 第七位满1或有进位...是一种变长编码，当整数值较大时，hash值的十六进制的有效位会较长，对应地ZigZag码字会出现需要5 byte存储；比如， ZigZag(Integer.MAX_VALUE)=[fe ff ff ff

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No.006 ZigZag Conversion

ZigZag Conversion Total Accepted: 98584 Total Submissions: 398018 Difficulty: Easy 　　The string "PAYPALISHIRING..." is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern...思路：　　首先，我们需要弄清楚这个ZigZag是怎么排列的，这个单词直译过来就是折线、之字形的，在这里不好具体表达，直接放一张图在下面，大家感受一下就知道了。

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LeetCode 0006 - ZigZag Conversion

ZigZag Conversion Desicription The string "PAYPALISHIRING" is written in a zigzag pattern on a given

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LeetCode-ZigZag conversion

Zigzag Conversion The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows...Every zigzag pattern is composed by a list of L structures....Let's write the zigzag position down.Assume numRows = 4 string : P A H N A P L S I I G Y I R position

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leetcode 6 ZigZag Conversion

The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you...I would like to extend it a little bit to make ZigZag easy understood.

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leetcode 6 ZigZag Converesion

class Solution { public: string convert(string s, int nRows) { if (n...

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Binary Tree Zigzag Level Order Traversal

来自：链接解题思路：这道题和上一题层序遍历那道题差不多，区别只是在于奇数层的节点要翻转过来存入数组。代码：

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ZigZag Conversion

ZigZag Conversion The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows

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ZigZag Conversion

https://blog.csdn.net/shiliang97/article/details/101626231 The string "PAYPALISHIRING" is written in a zigzag...P I N A L S I G Y A H R P I 来源：力扣（LeetCode）链接：https://leetcode-cn.com/problems/zigzag-conversion

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ZigZag ConversionZ字形变换

题目大意在行数row给定时，字符串“PAYPALISHIRING”的Z字形（zigzag）输出解题思路按行排序创建一个二维数组，里面有row个数组。...最后将二维数组内list合并按行访问 https://leetcode-cn.com/problems/zigzag-conversion/solution/ 代码按行排序 class Solution...= [[] for x in range(numRows)] row, step = 0, 1 for c in s: zigzag[row]...1: step = -1 row += step # return ''.join(reduce(operator.add, zigzag...)): result += ''.join(zigzag[i]) # list拼接为字符串 return result 总结

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编码原理（四）---ZIGZAG扫描

上一篇我们降到，经过量化后得到了诸多零值和整数值，本篇接下来讲讲编码过程中过对这些值如何组织和处理，那就是ZigZag扫描喽。...一、简介 ZigZag扫描也称作之字形扫描，何以得此称谓，是因为其扫描的路径特别像汉字中的之字。...ZigZag扫描的工作就是按照一定的路径，将量化后的系数从二维变到了一维的过程，废话不多说，上图。二、示意 ?...三、说明：（1）上图中左侧的图展示了ZigZag的扫描顺序，因为经过DCT变换和量化之后，实际上矩阵的右下角基本上都已经变为零值，非零值基本集中在矩阵的左上角，经过ZigZag扫描之后...，将二维的矩阵变为一个一维的串以后，最前边的便是非零值，靠后边的便是较多的零值；（2）这样的扫描产生的顺序，对于后续的熵编码提供了特别良好的前提。

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ZigZag Conversion

Problem # The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like...Solution(): def convert(self, s, numRows): if numRows == 1: return s step, zigzag...2, "" for i in range(numRows): for j in range(i, len(s), step): zigzag...+= s[j] if 0 < i < numRows - 1 and j + step - 2 * i < len(s): zigzag...+= s[j + step - 2 * i] return zigzag if __name__ == "__main__": assert Solution().convert

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LeetCode 0103 - Binary Tree Zigzag Level Order Traversal

Binary Tree Zigzag Level Order Traversal Desicription Given a binary tree, return the zigzag level order...For example: Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 return its zigzag

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【LeetCode题解-006】Zigzag Conversion

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you...n=2时，字符串坐标变成zigzag的走法就是： 0 2 4 6 1 3 5 7 n=3时的走法是： 0 4 8 1 3 5 7 9 2 6 10 n=4时的走法是： 0 6 12 1 5 7 11 13

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