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搜索关键字:histogram    ( 477个结果
HOG
HOG Descriptor Histogram of oriented gradients (HOG) are feature descriptors for the object detection purpose. Descriptor is a set of feature vectors....
分类:其他好文   时间:2014-09-01 19:09:03    阅读次数:257
hdu 1506 Largest Rectangle in a Histogram 单调栈
#include #include #include using namespace std;int a[100100],q[100100],l[100100],r[100100];int main(){ int i,n,cnt; while(scanf("%d",&n),n!=0) ...
分类:其他好文   时间:2014-08-28 22:34:16    阅读次数:224
反向投影的意义
http://en.wikipedia.org/wiki/Histogram_equalization#Back_projection Backprojection The back projection (or" project") of a histogrammed image is the re-application of themodified histogram to th...
分类:其他好文   时间:2014-08-26 11:37:15    阅读次数:270
hdu 1507 Largest Rectangle in a Histogram 动态规划计算最大面积
记录动态规划dpl,dpr,分辨记录i左面的比i大的,右面比i大的,然后(dpr[i]-dpl[i]+1)*h[i]得出长度 动态转移方程while(temp>1 && h[temp-1]>=h[i]) temp=dpl[temp-1] /************************************************************************* > F...
分类:其他好文   时间:2014-08-25 01:11:53    阅读次数:248
Largest Rectangle in Histogram
Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist...
分类:其他好文   时间:2014-08-22 21:04:59    阅读次数:168
leetcode第一刷_Largest Rectangle in Histogram
非常难的问题,数组线性时间。属于我之前说的解法的借助辅助空间。给定两个柱子,他们之间的面积由什么确定呢?没错,他们之间的距离和他们之间最矮的那个柱子的高度。我们并不知道这个柱子在什么位置,所以仅仅能遍历,这个复杂度就上去了。那有没有一个方法避免找中间小柱子呢?先想什么情况下不用找。除非你知道枚举出两...
分类:其他好文   时间:2014-08-19 16:16:44    阅读次数:176
Random words
To choose a random word from the histogram, the simplest algorithm is to build a list with multiple copies of each word, according to the observed fre...
分类:其他好文   时间:2014-08-17 19:47:42    阅读次数:139
Most common words
To find the most common words, we can apply the DSU pattern; most_common takes a histogram and returns a list of word-frequency tuples, sorted in reve...
分类:其他好文   时间:2014-08-17 17:00:32    阅读次数:180
Word histogram
Here is a program that reads a file and builds a histogram of the words in the file: process_file loops through the lines of the file, passi...
分类:其他好文   时间:2014-08-17 15:30:32    阅读次数:176
POJ 2559 Largest Rectangle in a Histogram RMQ || 单调栈
题目链接:点击打开链接 题意就是求最大面积 枚举每个柱子作为起点 然后二分两边长度。 求个区间最值。 #include #include #include using namespace std; #define ll long long #define N 100100 inline bool rd(int &n){ int x = 0, tmp = 1; ...
分类:其他好文   时间:2014-08-16 18:34:41    阅读次数:228
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