Multistate image restoration by transmission of bit-decomposed data
Multistate image restoration by transmission of bit-decomposed data
复制标题
DOI：
10.1103/physreve.65.016101
复制
发表时间：
2002-01-01
影响因子：
2.4
通讯作者：
Inoue, J
中科院分区：
文献类型：
--
作者：
Tadaki, T;Inoue, J
本文报道了灰度图像在传输前被分解为二值图像时的恢复问题。我们假设由一组Q-Ising自旋表示的灰度图像首先通过阈值分割分解为使用Ising（二进制）自旋的表达式，即，如果输入数据sigma(i)是{0，…，Q-1} σ (i)大于等于tom，否则为0，其中m为{1，…，Q-1}为阈值。噪声的影响与发送原始Q-Ising值的情况不同。我们研究了使用二进制数据进行传输或发送原始Q-Ising值是否更有效。利用平均场模型，定量分析了该方法的性能。为了研究我们的方法能有效地恢复什么样的原始图像，我们用平均场退火模拟了二维的标准图像，并将我们的方法与使用Q-Ising形式的方法的性能进行了比较。我们表明，当原始图像具有较大的部分时，我们的方法比使用Q-Ising形式的方法更有效，其中最邻近的像素值接近。
We report on the restoration of gray-scale image when it is decomposed into a binary form before transmission. We assume that a gray-scale image expressed by a set of Q-Ising spins is first decomposed into an expression using Ising (binary) spins by means of the threshold division, namely, we produce (Q-1) binary Ising spins from a Q-Ising spin by the function F(sigma(i) - m) = 1 if the input data sigma(i) is an element of {0,...,Q-1} is sigma(i)greater than or equal tom and 0 otherwise, where m is an element of{1,...,Q-1} is the threshold value. The effects of noise are different from the case where the raw Q-Ising values are sent. We investigate whether it is more effective to use the binary data for transmission, or to send the raw Q-Ising values. By using the mean-field model, we analyze the performance of our method quantitatively. In order to investigate what kind of original picture is efficiently restored by our method, the standard image in two dimensions is simulated by the mean-field annealing, and we compare the performance of our method with that using the Q-Ising form. We show that our method is more efficient than the one using the Q-Ising form when the original picture has large parts in which the nearest-neighboring pixels take close values.