基于Vc++的BMP与JPEG图像格式的相互转换

Image format conversion between BMP and JPEG is realized in Vc++ envoriment. When JPEG is converted into BMP, it can achieve digital images compression according to the user’s requirements. In the development of the software, blocks pre-processing, discrete cosine transform, quantization, entropy coding technology are used, it realized the image format conversion and achieved a higher compression ratio under the image quality basically unchanged. It described the design principles and processes, making the transformation of design a wide range of potential. The experimental results show that the system can achieve 50: 1 high compression ratio.