提出了一种基于整数小波变换的数字图像压缩方案。该算法首先对原始图像进行边界延拓,然后对延拓后的图像进行基于提升格式的整数小波变换,对于小波变换后的系数进行基于形态膨胀算法的嵌入式小波零树编码,最后进行自适应算法编码。实验结果表明,该方案在缩短编码时间以及提高压缩比和峰值信噪比方面,均取得了良好的效果。 A digital image compression scheme based on integer wavelet transform is proposed. Firstly, the algorithm extends the boundary of the original image, and then performs the integer wavelet transform based on the ascending format to the extended image. Then, the embedded wavelet zerotree coding based on morphological expansion algorithm is applied to the wavelet transform coefficients, and finally adaptive Algorithm coding. Experimental results show that this scheme achieves good results in shortening the coding time and improving the compression ratio and peak signal-to-noise ratio.