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https://github.com/fangwei123456/python-jpeg-encoder

create a standardized JPEG file
https://github.com/fangwei123456/python-jpeg-encoder

encode image-processing jpeg python

Last synced: about 1 month ago
JSON representation

create a standardized JPEG file

Host: GitHub
URL: https://github.com/fangwei123456/python-jpeg-encoder
Owner: fangwei123456
License: mit
Created: 2019-03-14T07:52:09.000Z (almost 6 years ago)
Default Branch: master
Last Pushed: 2019-03-14T08:33:55.000Z (almost 6 years ago)
Last Synced: 2024-11-27T23:42:16.092Z (about 1 month ago)
Topics: encode, image-processing, jpeg, python
Language: Python
Homepage:
Size: 695 KB
Stars: 45
Watchers: 1
Forks: 11
Open Issues: 3
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

README

        # python-jpeg-encoder

A jpeg encoder written in python. It can encode a BMP image file to a JPEG file. A jpeg decoder written in python is not needed because the encoder will create a standardized JPEG file, which can be opened with any picture viewer.

### **Usage:**

`python jpegEncoder.py inputBMPFileName outputJPEGFileName quality(from 1 to 100) debugMode(0 or 1)`

Example:

`python ./jpegEncoder.py ./lena.bmp ./output.jpg 95 0`

### **More information:**

If `debugMode` is 1, you will get more details about encoding process.

For example, run `jpegEncoder.py` by:

`python ./jpegEncoder.py ./8x8.bmp ./output.jpg 95 1`

And you will get:

srcImageWidth = 8 srcImageHeight = 8  

srcImage info:  

   

added to:  8 8  

yImageMatrix:  

 [[255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]  

 [255 255 255 255 255 255 255 255]]  

uImageMatrix:  

 [[128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]]  

vImageMatrix:  

 [[128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]  

 [128 128 128 128 128 128 128 128]]  

luminanceQuantTbl:  

 [[ 2  1  1  2  2  4  5  6]  

 [ 1  1  1  2  3  6  6  6]  

 [ 1  1  2  2  4  6  7  6]  

 [ 1  2  2  3  5  9  8  6]  

 [ 2  2  4  6  7 11 10  8]  

 [ 2  4  6  6  8 10 11  9]  

 [ 5  6  8  9 10 12 12 10]  

 [ 7  9 10 10 11 10 10 10]]  

chrominanceQuantTbl:   

 [[ 2  2  2  5 10 10 10 10]  

 [ 2  2  3  7 10 10 10 10]  

 [ 2  3  6 10 10 10 10 10]  

 [ 5  7 10 10 10 10 10 10]  

 [10 10 10 10 10 10 10 10]  

 [10 10 10 10 10 10 10 10]  

 [10 10 10 10 10 10 10 10]  

 [10 10 10 10 10 10 10 10]]  

blockSum =  1  

block (y,x):  0 0  ->  8 8  

yDctMatrix:  

 [[1024.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]  

 [   0.    0.    0.    0.    0.    0.    0.    0.]]  

uDctMatrix:  

 [[8. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]]  

vDctMatrix:  

 [[8. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]]  

yQuantMatrix:  

 [[512.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]  

 [  0.   0.   0.   0.   0.   0.   0.   0.]]  

uQuantMatrix:  

 [[4. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]]  

vQuantMatrix:  

 [[4. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]  

 [0. 0. 0. 0. 0. 0. 0. 0.]]  

encode dyDC: 512  

isLuminance= 1 (size,value)= 10 512 code= [1, 1, 1, 1, 1, 1, 0] [1, 0, 0, 0, 0, 0, 0, 0, 0, 0]  

encode yAC: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]  

EOB [1, 1, 0, 0]  

encode duDC: 4  

isLuminance= 0 (size,value)= 3 4 code= [1, 0, 1] [1, 0, 0]  

encode uAC: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]  

EOB [0, 1]  

encode dvDC: 4  

isLuminance= 0 (size,value)= 3 4 code= [1, 0, 1] [1, 0, 0]  

encode vAC: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]  

EOB [0, 1]