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Depth estimation based on interpolation of inverse focus statistics
Depth estimation based on interpolation of inverse focus statistics
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机译:基于逆聚焦统计插值的深度估计
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摘要
Embodiments are directed towards performing depth estimation within a digital camera system based on interpolation of inverse focus statistics. After an image is captured, various statistics or focus measure may be calculated using, for example, a high pass filter. Depth is estimated by interpolating the inverse of the statistics for three positions of focus for the image. The inverse of the statistics, St(n), may be 1/St(n), or 1/St2(n), or even 1/StZ(n), where Z≧1. Several approaches to interpolating the inverse values of the statistics to obtain a depth estimate are disclosed, including a general parabolic minimum approach, using a parabolic minimum within a progressive scheme, or within a continuous AF scheme. The depth estimate may then be used for a variety of applications, including automatic focusing, as well as converting 2D images to 3D images.
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机译:实施例针对基于逆聚焦统计的内插在数字相机系统内执行深度估计。在捕获图像之后,可以使用例如高通滤波器来计算各种统计量或聚焦度量。通过对图像的三个焦点位置内插统计量的倒数,可以估算深度。统计量的倒数St(n)可以是1 / St(n),或者1 / St 2 Sup>(n),甚至是1 / St Z Sup>( n),其中Z≥1。公开了内插统计量的逆值以获得深度估计的几种方法,包括一般的抛物线最小方法,在渐进式方案或连续AF方案中使用抛物线最小值。然后,深度估计可以用于各种应用,包括自动聚焦以及将2D图像转换为3D图像。
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