Rotate Image
You are givenNXN2D matrix representing an image.
Rotate the image by 90 degrees (clockwise ).
Follow up:Cocould you do this in-place?
For the original question on CC, remember that the time complexity O (N ^ 2) and space O (1 ).
Algorithm ideas:
Each transp
method One:
1, first open PS, click "File"-"open"
2, open the picture you want to rotate
3, then select "Image"-"image rotation", you can see the rotation of several methods, there are 90 degrees, 180 degrees, such as several commonly used rotation, there are horizontal flip and vertical flip, such as rotating mode
The former rotation is based on the
Failure phenomenon:
MIIX3 830 Tablet PC uses QQ with each other to carry on the video, when the portrait position or holds in the hand (the Lenovo logo is on), the opposite party sees the image to rotate to the right 90 degrees.
Reason Analysis:
This problem occurs because Windows
Desktop version of the QQ software video system does not support the gravity Flip, the default is 1024*768
You are givenNXN2D matrix representing an image. Rotate the image by 90 degrees (clockwise ). Follow up: Cocould you do this in-place? Transpose Class solution {public: void rotate (vector , Symmetric switching between each column Leetcode -- rotate
You are givenNXN2D matrix representing an image.
Rotate the image by 90 degrees (clockwise ).
Follow up:Cocould you do this in-place
The N * n matrix rotates 90 degrees clockwise. Law a [I] [J] --> A [J] [n-I]
Idea 1. Copy Data row by row according to the rule. A new two-dimensional array needs to be created, with a slightly higher space complexity.
2. Replace t
Rotate ImageYou are given an N x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise ).Follow up:Cocould you do this in-place?
Solution 1:
We can treat it as multiple nested loops and add a ring. From Outer Ring to inner ring. To facilitate the processing of various subscripts, we define top, bottom, left, and right to limit the upper and lower boundary of the ring.
1. Make TMP = up
You are givenNXN2D matrix representing an image. Rotate the image by 90 degrees (clockwise ). Follow up:Cocould you do this in-place? Matrix Rotation For example 1 2 3 4 5 6 7 8 9 Rotate 90 degrees clockwise 7 4 1 8 5 2 9 6 3 (I, j) Turn To (J, n-i-1) after rotation) Class Solution { Public : Void
You are given a n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).ExampleGiven a matrix[ [1,2], [3,4]]Rotate it by degrees (clockwise), return[ [3,1], [4,2]]ChallengeDo it in-place. Public classSolution {/** * @parammatrix:a List of lists of integers *@return: Void*/ Public voidRotateint[] matrix) { //Write your code here if(Matrix = =
title :You are given a n x n 2D matrix representing an image.Rotate the image by degrees (clockwise).Follow up:Could do this in-place?code : OJ Test via runtime:53 ms1 classSolution:2 #@param Matrix, a list of lists of integers3 #@return A list of lists of integers4 defrotate (self, matrix):5 ifMatrix isNone:6 returnNone7 ifLen (Matrix[0]) :8 returnMatrix9 TenN =Len (matrix[0]) One
Winform image scroll view (zoom in, zoom out, rotate, drag to view) [daily essay], winform essay
The method is tens of millions. I am just one of them [controlling pictures by controlling PictureBox, and displaying pictures in controls]... it's a little strange if you haven't done it for a few years!
Add the mouse scroll in the form structure:
1 ///
Scroll listener: and keep the picture in the middle
1 ///
The original title link is here: https://leetcode.com/problems/rotate-image/Rotate the matrix clockwise, and give examples to find out the rules.If you need to make a in-space, then the equivalent of splitting the matrix into four blocks, the first block value is retained, and then four pieces are assigned, the last piece equals the reserved value. However, it is
Suppose you want to draw a 32*32 image at the point (x, y) and rotate it in the center of the image, use the following
CodeThen you can rotate glfloat vertices [] = {-imagewidth/2,-imageheight/2, imagewidth/2,-imageheight/2,-imagewidth/2, imageheight/2, imagewidth/2, imageheight/2}; //
number, equivalent to the above method, each rotation of a number, a group of 4 numbers are rotated, So now the question is how to complete all the numbers are rotated 90 degrees and not much rotation, continue to analyze it, n=1, do not need to rotate. n=2, you only need to complete the rotation of 1 (a[0][0]) to complete the rotation of the entire array. N=3, you need to complete the rotation of the a[0][0],a[0][1] to complete the rotation of the e
Today in Lintcode did a problem, I think about the practice, made, but felt it necessary to record.Test instructionsGiven a nxn two-dimensional matrix to represent the image, 90 degrees clockwise rotation of the image.Examples:Given a rectangle [[1,2],[3,4]],90] Clockwise, return [[3,1],[4,2]]Challenge:Can you do it in situ?1. Solving ideasAt first glance, this problem is really very simple. Here I use a graph to express the problem-solving ideas:2. C
Leetcode Note: Rotate Image
I. Description
You are givenn×n2D matrix representing an image.Rotate the image by 90 degrees (clockwise ).Follow up: cocould you do this in-place?
Ii. Question Analysis
Since the image must be rotated 90 degrees clockwise, the simplest way is to draw a picture to observe the
Title: Give a matrix, rotate it clockwise 90 °.Problem Analysis: The Pass method is to transpose the matrix first, then reverse each line, or reverse each column first and then transpose it. I just want to say "It ' s amazing!". (Forgivig my poor english!)The code is as follows (it doesn't matter how the code is written!) ):Class Solution {public: void rotate (vector Leetcode 48.
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