目的探求一种基于亮度不变的医学超声图像对比度增强方法。
Objective To explore contrast enhancement method of medical ultrasonic images based on preserving brightness.
恒定电流源可以避免因输入电压的波动使LED的驱动电流波动并维持LED的亮度不变。
Constant current source can avoid the fluctuations of output current due to the fluctuations of input voltage, and maintain the brightness of LED.
本文提出了一种基于几何仿射不变量和亮度不变量的缺失摄像机标定参数图像的立体匹配方法。
In this paper, a stereo matching method for image uncalibrated camera parameter is proposed, which is based on geometric affine invariant and photometric invariant.
LED强烈的调制速度是如此之快，人眼是察觉不到的，所以觉得输出(亮度)不变。
The LED intensity is modulated so rapidly that human eyes cannot notice, so the output appears constant.
在YUV色彩空间中，实现了对亮度信息进行增强，对色差保持不变的增强方法。
Carried out to enhance lightness, keep the chromatic aberration invariable in the YUV color space.
通过分析阴影的物理模型，得出局部纹理的光照不变性，利用基于比值判决的LBP纹理法来区分运动车辆和阴影，并应用亮度约束和几何启发式准则进一步改善阴影检测效果。
The distribution of improved LBP texture is discussed and a significant test is performed to classify each moving pixel into foreground object or moving shadow according to this theory.
实验证明，算法对图像的亮度变化、缩放、旋转具有不变性，有较高的检索性能。
Experimental results show that the algorithm has the robustness against illumination changes, position translation, scale and rotated image and a superior image-retrieving performance.
实验证明，算法对图像的亮度变化、缩放、旋转具有不变性，有较高的检索性能。
Experimental results show that the algorithm has the robustness against illumination changes, position translation, scale and rotated image and a superior image-retrieving performance.
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