dots_imagedots_imageDotsImageDotsImagedots_image (算子名称)

名称

dots_imagedots_imageDotsImageDotsImagedots_image — Enhance circular dots in an image.

参数签名

描述

dots_imagedots_imageDotsImageDotsImageDotsImagedots_image enhances circular dots of diameter DiameterDiameterDiameterDiameterdiameterdiameter in the input image ImageImageImageImageimageimage. Hence, dots_imagedots_imageDotsImageDotsImageDotsImagedots_image is especially suited for the segmentation of dot prints, e.g., in OCR applications. The enhancement is performed by using matched filters with filter masks that are tuned for a particular dot size. For example, for DiameterDiameterDiameterDiameterdiameterdiameter = 5 the filter mask is given by: The parameter FilterTypeFilterTypeFilterTypeFilterTypefilterTypefilter_type selects whether 'dark'"dark""dark""dark""dark""dark", 'light'"light""light""light""light""light", or 'all'"all""all""all""all""all" dots in the image should be enhanced. The PixelShiftPixelShiftPixelShiftPixelShiftpixelShiftpixel_shift can be used either to increase the contrast of the output image (PixelShiftPixelShiftPixelShiftPixelShiftpixelShiftpixel_shift > 0) or to dampen the values in extremely bright areas that would be cut off otherwise (PixelShiftPixelShiftPixelShiftPixelShiftpixelShiftpixel_shift = -1).

注意

Note that filter operators may return unexpected results if an image with a reduced domain is used as input. Please refer to the chapter 过滤器.

运行信息

• 多线程类型:可重入(与非独占操作符并行运行)。
• 多线程作用域:全局(可以从任何线程调用)。
• 在元组级别自动并行化。
• 在图像通道级别自动并行化。
• Automatically parallelized on domain level.

参数表

可能的后置算子

thresholdthresholdThresholdThresholdThresholdthreshold

可替代算子

laplacelaplaceLaplaceLaplaceLaplacelaplace, laplace_of_gausslaplace_of_gaussLaplaceOfGaussLaplaceOfGaussLaplaceOfGausslaplace_of_gauss, diff_of_gaussdiff_of_gaussDiffOfGaussDiffOfGaussDiffOfGaussdiff_of_gauss, derivate_gaussderivate_gaussDerivateGaussDerivateGaussDerivateGaussderivate_gauss, convol_imageconvol_imageConvolImageConvolImageConvolImageconvol_image

模块

Foundation

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