JPEG Decoder Library

This repo contains an implemetation of JPEG decoder. Currently only baseline DCT and extended sequential DCT modes are supported. The project uses fast and optimized DCT algorithm as a thirdparty.

Decoding large 21600x10800px Earth Topography image without chroma subsampling (YCbCr444) takes just 1.5 seconds on x64 Intel Core i7-9750H @ 2.60GHz CPU.

Demo

To run demo follow the next steps:

git clone --recurse-submodules https://github.com/Mr6one/JpegDecoder.git
cd JpegDecoder/demo
mkdir build && cd build
cmake .. && make -j4
./main path/to/jpeg/image

Usage

To use library inside your project via CMake follow the next steps:

add_subdirectory(/path/to/jpeg ${CMAKE_CURRENT_BINARY_DIR}/jpeg)

target_include_directories(${linking_target} PRIVATE ${jpeg_SOURCE_DIR}/include)
target_link_libraries(${linking_target} PRIVATE jpeg)

and then

#include "jpeg.hpp"

References

1. Wallace G. K. The JPEG still picture compression standard //IEEE transactions on consumer electronics. – 1992. – Т. 38. – №. 1. – С. xviii-xxxiv.
2. Rabbani M., Joshi R. An overview of the JPEG 2000 still image compression standard //Signal processing: Image communication. – 2002. – Т. 17. – №. 1. – С. 3-48.
3. Hamilton E. JPEG file interchange format. – 2004.