We know that the encoding method should be declared in the header file of Python source code. If you don't just use ASCII code, many people may write a little different:
# Coding = UTF-8
# Coding: UTF-8
#-*-Coding: UTF-8 -*-
So how can we effectively write data? What advantages are ineffective?
For more information, see http://www.python.org/dev/peps/p
1. Prediction code
CompressionAlgorithmThe essence is to remove redundancy between signals. What is signal redundancy? The correlation between signals is redundancy. human hearing or visual systems that do not feel or mask can also be used as redundant components. Today we will talk about the concept of predictive coding, which is a very intuitive and simple method. It is intuitive. Taking an image as an example, There Are similarity and correlation
"Digital Image Processing" of an experimental operation is required as follows:
I found on the Internet on the topic of the MATLAB version of the code, links are as follows:
I refer to the above link, mainly made the following two aspects of the changes:
(1) The reference code with OPENCV again (the main difficulty is that OpenCV seems to have no similar
First, the concept of entropy coding:The bigger the entropy, the more chaotic.Entropy in Informatics:
Used to measure the entropy of messages, and the uncertainty of information
The more random and irrelevant information, the higher the entropy
Source code theorem:
This shows the relationship between the entropy of Shannon and the probability of the source sign.
Entropy of information is the lower limit of average code length after lossless
Both arithmetic coding and program encoding are lossless compression.
Arithmetic coding is a lossless data compression method and an entropy encoding method. Different from other entropy coding methods, other entropy coding methods usually divide input mes
commonly used in pixel encoding: 1. pulse Code Modulation (PCM); 2. entropy Coding; 3. run Length Coding; 4. bit Plane Coding (Bit Plane Coding ). Here, we will introduce the Huffman encoding and travel encoding in entropy (taking reading the. PCX file as an example ).The so-called predictive encoding is to remove the
Code originThe growth of the coding witnessed the computer by the individual to the collective by the State to the worldFirst, the initial codeThe computer originally coded the concept of the first computer everyone held 0101Second, the following is the origin of the byte"The so-called byte, the original meaning is used to denote a complete character." The initial computer performance and storage capacity are poor, so the general use of 4-bit BCD code
. Indent to a mean of 0 with a variance of 1
For discrete features:
binarize Categorical/discrete features: For the discrete feature is basically according to the One-hot (single Hot) coding, the discrete characteristics of how many values, the number of Bellavita to represent the feature.
I. What is a single-hot code?Single hot Code, in the English literature is called One-hot code, the intuitive way is how many states have how man
Truncation parameter C
BS = 4
More Obvious Block Effect
More severe filtering is required to remove the block effect.
Perform strong filter on the boundary when the following conditions are met:
Modify when FilteringP0,P1,P2Pixel value
Modify only when weak FilteringP0Pixel value
Chapter 2 video encoding standards
1. International Standards Organization
ITU (International Telecommunications Union): International Telecommunication Union
ISO (International Standardi
First, the arithmetic coding definition
It is a non-grouping coding algorithm. It is based on the whole sequence, using recursive form of continuous coding. Instead of mapping a single source symbol into a code word, the symbol for the entire input sequence is mapped to a small interval within the interval [0 1] on the real axis, and a representativ
Huffman Coding (Huffman coding) is a coding method, and Huffman coding is a variable-length encoding (VLC).
Huffman code uses a variable-length coding table to encode a source symbol (such as a letter in a file). The Variable length codi
Python coding (14) and python CodingI. Knowledge of character encoding
1. How the text editor accesses files (nodepad ++, pycharm, word)
Open the editor and start a process, which is in the memory. Therefore, the content written in the editor is also stored in the memory. After power failure, data is lost and therefore needs to be saved to the hard disk, click the Save button to fl data from the memory to the hard disk. At this point, we compile a py
Second, the basic concept of Git
1. Four Concepts about storage
2. Branch (branch)
Third, the project management practical operation
1. Install GHFW (GitHub for Windows)
2. Create a new project on coding (new remote warehouse)
3. Create a local warehouse
4, the basic use of GHFW
configuration: Win7 + GitHub for Windowstarget Audience: n
Learn about Coding-iOS open source project log (4) and coding-ios open source project log (4)
Hello, everyone. I haven't written a blog for a long time. Today I will study the Coding source code again.
Earlier: as a beginner programmer, an effective learning method is to learn good projects from others. At the beginning of this article, I will gradually updat
IOS client Coding project record navigation, ios client coding project
IOS client Coding project record (1)
A: The Clear button appears in UITextField settings.
B: Some settings for drawing an underline table
C: You can define the header and bottom view (connecting the Code)
D: Hide the navigation bar on this page.
F: activity indicator UIActivity
Coding (Code city) basic configuration tutorial, coding tutorial
Coding was first recognized as a new company. The predecessors said that we use coding. As a git configuration, we should refer to the tutorial. For example, configuring coding is definitely a tough task, howe
The Turbo code skillfully constructs the long code with pseudo random character by the parallel cascade of two simple component codes through pseudo random interleaving, and realizes pseudo random decoding by multiple iterations between two soft/soft out (SISO) decoders. His performance is far more than other coding methods, and has received wide attention and development.
Turbo Coding Principle
JQuery coding specifications and best practices, jquery coding Best PracticesFront-end development whqet, csdn, Wang haiqing, whqet, front-end development expert
Translated by: front-end whqet development. If this is not the case, you are welcome to correct it.
The translator said: most of the basic teaching content has been explained. Before large-scale project training
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