Another use of this effect is simulating light fading into the distance (use a gray gradient).
另外一种效果是模拟光线由近及远逐渐减弱(使用灰度渐变)。
Create another smaller circle and fill it with a radial gray gradient.
再制作一个小圆，填充灰色径向渐变。
Create a rectangle in a new document or the just opened one. Fill it with a linear dark gray gradient.
新建文档或者就用打开的文档，绘制一个矩形，填充深灰色线性渐变。
A binarization method for digital camerabased document image was proposed. The method is a combination of the global thresholding, local thresholding and the gray gradient method.
提出了一种数码相机拍摄的文本图像的二值化方法，该方法是全局阈值、局部阈值与灰度梯度方法的结合。
The gray-gradient co-occurrence matrix of the text region is calculated, and the optimum thresholds of segmented grayscale and gradient are found quickly according to the objective function.
首先计算文本区域的灰度-梯度共生矩阵，并根据目标函数快速地找到分割的灰度和梯度最佳阈值；
The gray-gradient co-occurrence matrix of the text region is calculated, and the optimum thresholds of segmented grayscale and gradient are found quickly according to the objective function.
首先计算文本区域的灰度-梯度共生矩阵，并根据目标函数快速地找到分割的灰度和梯度最佳阈值；
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