xor

问题 Starting with two images im1 and im2 created with the PIL module, we have the corresponding black and white images, bw_im1 = im1.convert('1') and bw_im2 = im2.convert('1') Each pixel of bw_im2 and bw_im2 is either 0 or 256. Suppose both bw_im2 and bw_im2 have the same size. How do you XOR all the corresponding entries and then sum them up? My Work I wrote the following stub / proof of concept Python program, but worried that using the code (unpacking/translating over) would be complicated.

问题 Starting with two images im1 and im2 created with the PIL module, we have the corresponding black and white images, bw_im1 = im1.convert('1') and bw_im2 = im2.convert('1') Each pixel of bw_im2 and bw_im2 is either 0 or 256. Suppose both bw_im2 and bw_im2 have the same size. How do you XOR all the corresponding entries and then sum them up? My Work I wrote the following stub / proof of concept Python program, but worried that using the code (unpacking/translating over) would be complicated.

问题 I recently started playing around with C#, and I'm trying to understand why the following code doesn't compile. On the line with the error comment, I get: Cannot implicitly convert type 'int' to 'char'. An explicit conversion exits (are you missing a cast?) I'm trying to do a simple XOR operation with two strings. public string calcXor (string a, string b) { char[] charAArray = a.ToCharArray(); char[] charBArray = b.ToCharArray(); char[] result = new char[6]; int len = 0; // Set length to be

问题 Given an array of odd numbers or even numbers, how can one efficiently get pairs of this array whose XOR == 2? For example: arr = [4,10,2,6,8] pairs are: [(4,6), (8,10)] #4^6 == 2, 8^10 == 2 Or: arr = [5,9,3,7,11] pairs are: [(9,11), (5,7),] I did this to get them (brute-force) for i in combinations(inev,2):#inev is the list of indices (positions of the numbers in the array) if not (arr[i[0]] ^ arr[i[1]]) & 1 and (arr[i[0]] ^ arr[i[1]]) == 2: print arr[i[0]], arr[i[1]] #I print the pair 来源：

问题 Given an array of odd numbers or even numbers, how can one efficiently get pairs of this array whose XOR == 2? For example: arr = [4,10,2,6,8] pairs are: [(4,6), (8,10)] #4^6 == 2, 8^10 == 2 Or: arr = [5,9,3,7,11] pairs are: [(9,11), (5,7),] I did this to get them (brute-force) for i in combinations(inev,2):#inev is the list of indices (positions of the numbers in the array) if not (arr[i[0]] ^ arr[i[1]]) & 1 and (arr[i[0]] ^ arr[i[1]]) == 2: print arr[i[0]], arr[i[1]] #I print the pair 来源：

问题 I am making a HTTP POST request to my server from my C++ application via sockets , I will be XORing the POST values from my C++ application before they are sent to my server. Once these XORed POST values are sent to my server I am going to need to be able to 'decrypt' them before processing the values on my server. My C++ application currently is XORing strings like so char *XOR(char *string) { //key = 0x10 char buffer[1000] = { 0 }; for (int i = 0; i < strlen(string); i++) buffer[i] = string

问题 I am making a HTTP POST request to my server from my C++ application via sockets , I will be XORing the POST values from my C++ application before they are sent to my server. Once these XORed POST values are sent to my server I am going to need to be able to 'decrypt' them before processing the values on my server. My C++ application currently is XORing strings like so char *XOR(char *string) { //key = 0x10 char buffer[1000] = { 0 }; for (int i = 0; i < strlen(string); i++) buffer[i] = string

问题 I am trying to encrypt a message from a text file by using the bit-wise XOR operation on the left and right characters with two specific keys from another file(keys.txt), but I am receiving unreadable code in front of the original text file(nothing changed), which is not right. I am using two text files: 1) Input.txt - containing the message that is to be encrypted 2) Keys.txt - This contains two characters that do the XOR operation to each character in the input.txt (character 1 is key 1 and

问题 I am trying to encrypt a message from a text file by using the bit-wise XOR operation on the left and right characters with two specific keys from another file(keys.txt), but I am receiving unreadable code in front of the original text file(nothing changed), which is not right. I am using two text files: 1) Input.txt - containing the message that is to be encrypted 2) Keys.txt - This contains two characters that do the XOR operation to each character in the input.txt (character 1 is key 1 and

问题 I'm trying to remember how the math is worked out to compute the remainder of an XOR algorithm in Cyclical Redundancy Checks to verify the remainder bits of a network message. I shouldn't have tossed that text book. This is easily done in code, but how is it worked out by hand? I know it looks something like a standard division algorithm, but I can't remember where to go from there to get the remainder. ___________ 1010 | 101101000 Note: I did google it, but wasn't able to find a place where