JPEG-Image-Compressor
A Python program that compresses raw images based on the JPEG compression algorithm. (by mVirtuoso21)
American-Sign-Language-Recognition
Recognise and Learn American Sign Language (by Nam-H-Pham)
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JPEG-Image-Compressor | American-Sign-Language-Recognition | |
---|---|---|
2 | 1 | |
38 | 9 | |
- | - | |
3.3 | 3.5 | |
4 months ago | 6 months ago | |
Python | Python | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
JPEG-Image-Compressor
Posts with mentions or reviews of JPEG-Image-Compressor.
We have used some of these posts to build our list of alternatives
and similar projects.
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JPEG image compression algorithm using Python
To anyone interested in using JPEG's compression algorithm, I wrote a little program as a project for a course to do so. Here's the link to my repository on GitHub: https://github.com/mVirtuoso21/JPEG-Image-Compressor.git This Python program compresses raw images based on the JPEG compression algorithm. This program takes as input a raw image (eg: .bmp). The image is read using the OpenCV library in BGR color space, then converted to YCrCb. Each channel is normalized by subtracting 128. Then a 4: 2: 2 subsampling scheme is applied (another scheme can be used), by utilizing a 2 × 2 averaging filter on the chrominance channels (another type of filter can be used), thus reducing the number of bits per pixel to 8 + 4 + 4 = 16. Each channel is divided into 8 × 8 blocks – and is padded with zeros if needed. Each block undergoes a discrete cosine transform, where in the resulting block, the first component of each block is called the DC coefficient, and the other 63 are AC components. DC coefficients are encoded using DPCM as follows: , . AC components are encoded using run length in the following way: , , while using zigzag scan on the block to produce longer runs of zeros. An intermediary stream consists of encoded DC and AC components, and an EOB (end of block) to mark the end of the block. To achieve a higher compression rate, all zero AC components are trimmed from the end of the zigzag scan. A Huffman dictionary is created by calculating the frequency of each intermediary symbol. Since one image is to be sent in this project, the frequencies of the intermediary symbols will be calculated from those of this image (one can use a predefined Huffman dictionary). Each intermediary stream is encoded using its assigned codeword. The encoded bitstream is then written to an output file.
American-Sign-Language-Recognition
Posts with mentions or reviews of American-Sign-Language-Recognition.
We have used some of these posts to build our list of alternatives
and similar projects.
-
Real Time Sign Language Recognition
The entire project can be found here: https://github.com/Nam-H-Pham/American-Sign-Language-Recognition
What are some alternatives?
When comparing JPEG-Image-Compressor and American-Sign-Language-Recognition you can also consider the following projects:
Batch-crop-images - A tool for cropping similar images in a batch with an interface.
Hand-Gesture-Recognition
PyVideoFramesExtractor - Extract frames from videos in Python using OpenCV.
CheekyKeys - Use Python, OpenCV, and MediaPipe to control a keyboard with facial gestures
toojpeg - A JPEG encoder in a single C++ file
attendance-management - Simple project to make attendence with OpenCV
airdraw - A vision-based drawing application
Doctor-Strange-Filter - Python project using OpenCV and Mediapipe to create a Dr. Strange filter. It detects hand gestures, calculates palm midpoint and openness, then overlays a mask if the hand is open. A concise demonstration of computer vision concepts like perspective and image rotation.
JPEG-Image-Compressor vs Batch-crop-images
American-Sign-Language-Recognition vs Hand-Gesture-Recognition
JPEG-Image-Compressor vs PyVideoFramesExtractor
American-Sign-Language-Recognition vs CheekyKeys
JPEG-Image-Compressor vs toojpeg
American-Sign-Language-Recognition vs attendance-management
American-Sign-Language-Recognition vs PyVideoFramesExtractor
American-Sign-Language-Recognition vs airdraw
American-Sign-Language-Recognition vs Doctor-Strange-Filter