huffman-code

问题 I just finished creating a huffman compression algorithm . I converted my compressed text from a string to a byte array with bytearray(). Im attempting to decompress my huffman algorithm. My only concern though is that i cannot convert my byte array back into a string. Is there any built in function i could use to convert my byte array (with a variable) back into a string? If not is there a better method to convert my compressed string to something else? I attempted to use byte_array.decode()

问题 Possible Duplicate Converting byte array to string and back again in C# I am using Huffman Coding for compression and decompression of some text from here The code in there builds a huffman tree to use it for encoding and decoding. Everything works fine when I use the code directly . For my situation, i need to get the compressed content, store it and decompress it when ever need. The output from the encoder and the input to the decoder are BitArray . When I tried convert this BitArray to

问题 We have a database encoded with Huffman coding. The aim here is to copy on the GPU it with its associated decoder; then on the GPU, decod the database and do stuff on this decoded database without copying back it on the CPU. I am far to be a Huffman specialist, but the few I know shows that it seems to be an algorithm essentially based on control structures. With the basic algorithm, I am afraid that there will be a lot of serialized operations. My 2 questions are: do you know if there exists

问题 I am new in programming and working on c++ (even the concept of problem is same in c, I guess). I am reading a file as sole arguments which contains alphabtes(symbols in my code) like "aabbacceaad" to calculate frequency. My code calculate frequency correctly.I am sure of that. The problem is that in my code Node *tree pointer variable (which is of type node). I am using it to create tree.But when i try to create tree from the frequency calculated from repeated symbols then this tree pointer

问题 I have implemented a class for Huffman coding. The class will parse an input file and build a huffman tree from it and creates a map which has each of the distinct characters appeared in the file as the key and the huffman code of the character as its value. For example, let the string "aravind_is_a_good_boy" be the only line in the file. When you build the huffman tree and generate the huffman code for each character, we can see that, for the character 'a', the huffman code is '101' and for

问题 I am implementing a function that takes in a tree and an encoded string. Example: decode(*Huffmantree, "10010101010") I want this function to return decoded string for the encoded string in the input relative to the Huffman tree input. The code I have so far: string decode(NodePtr root, string encoded_str) { string temp = ""; for (int i = 0 ; i < encoded_str.size() ; i++) { if (root->is_leaf() == true) { temp[i] = root->letter; //cout << root->letter; } if (root->left != NULL) { encoded_str.

问题 I'm trying to write a procedure Huffman-leaves; the procedure returns a list of pairs from a created huffman tree. Example on how it runs (huffman-leaves sample-tree) ->((A . 8) (C . 5) (B . 1) (D . 1)) What I've comed up with but got writers block... (define (huffman-leaves tree) (define (huffman-get-pairs current-branch pairs) (if (or (null? tree) (null? current-branch)) pairs (let ((next-branch (get-branch (car current-branch) current-branch))) (not (member? next-branch pairs) (if (leaf?

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I'm not sure how I'm going to attack the traversing of my Huffman Tree. The tree is correct, I just have a hard time figuring out how to traverse it in a good way. For some reason, my traversing method gives no result... UPDATE: Cleaned up the code, made it more Object Oriented Node class: public class Node {

问题 I have a program that produces a Huffman tree based on ASCII character frequency read in a text input file. The Huffman codes are stored in a string array of 256 elements, empty string if the character is not read. This program also encodes and compresses an output file. I am now trying to decompress and decode my current output file which is opened as an input file and a new output file is to have the decoded message identical to the original text input file. My thought process for this part

问题 I want encode every file by Huffman code. I have found the length of bits per symbol (its Huffman code). Is it possible to encode a character into a file in Java: are there any existing classes that read and write to a file bit by bit and not with minimum dimension of char? 回答1: You could create a BitSet to store your encoding as you are creating it and simply write the String representation to a file when you are done. 回答2: You really don't want to write single bits to a file, believe me.