| Line 23: | Line 23: | ||
*Since the quantization will obviously cause loss of data, we should try the quantization in different levels and the analyse the error. | *Since the quantization will obviously cause loss of data, we should try the quantization in different levels and the analyse the error. | ||
==3. Theory == | ==3. Theory == | ||
| − | To operate an uniform quantization, the first things is to determine the uniform quantization step delta. <math> delta = \frac{Max(X) - Min(X)}{N-1} </math> | + | To operate an uniform quantization, the first things is to determine the uniform quantization step delta. |
| + | -- | ||
| + | <math> delta = \frac{Max(X) - Min(X)}{N-1} </math> | ||
Where X is the signal to be quantized and N is the number of quantization levels. | Where X is the signal to be quantized and N is the number of quantization levels. | ||
The quantization step delta is the range of values will to be quantized. | The quantization step delta is the range of values will to be quantized. | ||
Revision as of 18:38, 29 November 2015
A slecture by ECE student Yitong Wang
Partly based on the ECE438 Fall 2015 lecture material of Boutin.
Contents
1. Introduction (Implementation of Quantization)
Quantization is an operation to compress a signal by reducing a range of values to a single value. This slecture will describe the implementation of image quantization $ f(x)= \frac{1}{5} \sin x \int_{-\infty}^\alpha \pi^y dy $
2. Background
- The brightness of a photo at each pixel is typically distributed among integers from 0 to 255. However, since some images are desired to take only several values, the brightness value has to be rounded off to fit the size of the image.
- Since the quantization will obviously cause loss of data, we should try the quantization in different levels and the analyse the error.
3. Theory
To operate an uniform quantization, the first things is to determine the uniform quantization step delta. --
$ delta = \frac{Max(X) - Min(X)}{N-1} $
Where X is the signal to be quantized and N is the number of quantization levels. The quantization step delta is the range of values will to be quantized.
4. Conclusion (Replace by appropriate section title)
Text of fourth section goes here.
5. References
- Reference 1
- reference 2
Questions and comments
If you have any questions, comments, etc. please post them here.
Back to 2015 Fall ECE 438 Boutin
