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1)  complexity histogram
复杂度直方图
1.
Statistical analysis based on complexity histogram discontinuities measure is a powerful steganalytic technique for detecting the presence of secret message embedded in the digital images using Bit-Plane Complexity Segmentation(BPCS).
复杂度直方图的不连续性测度的隐写分析能有效地察觉以位平面复杂度分割(BPCS)隐写的秘密信息的存在。
2.
The continuity of the complexity histogram of the pixel block is affected by the embedded data.
为实现对位平面复杂度分割(BPCS)隐写的有效检测,分析了图像复杂度直方图在像素块替换前后的变化,针对载密图像的位平面复杂度直方图出现明显的不连续点,定义了新的直方图不连续性测度,并提出了改进的检测算法。
2)  weighted complex historgram
加权复杂度直方图
3)  image complexity
图像复杂度
1.
We propose a measurement,called image complexity,which could predict the influence of residual operation on the quality of recovered video images before transform is performed on them.
本文提出了一个能够在对视频图像进行变换操作前就可以预测残差操作对重构视频图像质量影响的度量值,称为图像复杂度,并在此基础上针对3D-DWT-SPIHT视频图像压缩算法提出了自适应帧组残差操作(AGRO)。
2.
Based on the difference of image complexity between original images and stego ones, this paper proposes a new technique for detecting least significant bit (LSB) embedding in digital images.
基于掩密图像与原始图像在图像复杂度上的差异,提出了一种新的针对图像LSB嵌入的掩密分析算法,通过分析待检图像在嵌入测试消息前后图像复杂度均值和方差的变化情况,利用Fisher判决准则,从而准确判断图像中是否嵌入了秘密消息。
4)  picture complexity
图像复杂度
1.
264 TM5 rate control algorithm on sequence smoothness keeping and buffer controlling, the picture complexity and buffer situation were considered simultaneously, and an improved frame layer rate control algorithm based on H.
264TM5码率控制算法在保持图像序列平滑性和缓冲控制上的不足,同时考虑图像复杂度和缓冲状况,在H。
5)  gradation histogram
灰度直方图
1.
By using the image processing function and programming tomography,the following functions are realized: the contour line,edge line and gradation histogram of medical images are displayed;the selected regions of medical images are freely zoomed;the gray level of discretional regions is displayed using medical image processing tool and the distance of the given points is freely measured.
0图像处理函数和编程技巧,可展示医学图像的轮廓线、内部组织的边缘线和灰度直方图,对图像选定区域进行自由放大和缩小,利用图像处理工具显示任意区域的灰度值,并能自如测量两点间的距离,可以对图像分割技术中的不同方式进行灵活对比,为临床诊断提供有用的参考。
6)  gray level histogram
灰度直方图
1.
This paper simulates the image s gray level histogram with a series of Gaussian functions, and calculates the optimal thresholds between different neighboring Gaussian functions, and then separates the needed area from the whole image.
以图像分割为基础,采用自适应旋转投影分解法,用一组高斯函数来拟合图像的灰度直方图,计算出相邻高斯函数间的最优阈值,从而将待计算部分从图像中分割出来;采用数字图像分割方法,便于计算各种复杂形状的面积。
2.
In this paper, adaptive oriented orthogonal projective decomposition is used to decompose the gray level histogram of image with complex background into the combination of several Gauss density functions.
文中使用了自适应定向正交投影分解算法将复杂图像的直方图分解为多个高斯分布的组合,进而将灰度区间划分为多个子区间并计算出灰度直方图在这些子区间上的面积,而目标在图像中的成像面积是可以预先作出估计的,从而利用两者之间的关系给出分割图像的阈值,实现对图像的分割。
3.
The threshold methods of image segmentation are surveyed in this article, especially those based on the gray level histogram.
本文对现有的各种图像阈值分割方法进行综述,重点介绍了基于图像灰度直方图的阈值分割方法。
补充资料:直方图
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性质:是一种直观地表示数据统计分布特性的图示方法。将一组依数值大小顺序排列的测量数据,按一定组距细分为若干组,以出现在各分组的频数和频率为纵坐标,以分组的组界值为横坐标画成的矩形分布图,便是频数和频率直方图。直方图各矩形的频数之和等于测量值的总数,直方图各矩形的频率之和等于l。用直线连接频数和频率直方图各矩形上方的中点得到的曲线,相应得到频数和频率曲线。当测量值的数目足够的多,分组的组距非常小,频数和频率曲线变成平滑的曲线,所得到的平滑曲线,相应称为频数分布曲线和频率分布曲线。

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