Currently, the SURE-LET approach has been widely used for the removal of noise in corrupted image. However the original interscale-based SURE-LET approach rules out intrascale considerations of wavelet coefficients, w...
详细信息
Currently, the SURE-LET approach has been widely used for the removal of noise in corrupted image. However the original interscale-based SURE-LET approach rules out intrascale considerations of wavelet coefficients, which makes the denoising ability of the technique is reduced greatly. In this paper, the local Wiener-like estimator is incorporated into the original interscale-based SURE-LET thresholding function. The tests show the improved interscale-based SURE-LET gets the better denoising performance objectively and subjectively. Especially for Barbara image, the PSNR is on average improved by 0.52dB compared to the traditional pointwise interscale-based SURE-LET approach.
We constructed a single C-B zier curve with a shape parameter for G2 joining two circular arcs. It was shown that an S-shaped transition curve, which is able to manage a broader scope about two circle radii than the B...
详细信息
We constructed a single C-B zier curve with a shape parameter for G2 joining two circular arcs. It was shown that an S-shaped transition curve, which is able to manage a broader scope about two circle radii than the B zier curves, has no curvature extrema, while a C-shaped transition curve has a single curvature extremum. Regarding the two kinds of curves, specific algo- rithms were presented in detail, strict mathematical proofs were given, and the effectiveness of the method was shown by examples. This method has the following three advantages: (1) the pattern is unified; (2) the parameter able to adjust the shape of the tran- sition curve is available; (3) the transition curve is only a single segment, and the algorithm can be formulated as a low order equation to be solved for its positive root. These advantages make the method simple and easy to implement.
Grain size of forged nickel alloy is an important feature for the mechanical properties of the material. For fully automatic grain size evaluation in images of micrographs it is necessary to detect the boundaries of e...
详细信息
This paper describes a fast image segmentation approach designed for pavement detection in a moving camera. The method is based on a graph-oriented segmentation approach where gradient information is used temporally a...
详细信息
Inspired by the human visual system (HVS), Alessandro Foi et al. design a foveation operator to calculate the similarity of patch. The calculation of similarity is called the foveated self-similarity (FSS). Their stud...
Inspired by the human visual system (HVS), Alessandro Foi et al. design a foveation operator to calculate the similarity of patch. The calculation of similarity is called the foveated self-similarity (FSS). Their study shows that FSS is much superior to the traditional windowed self-similarity (WSS). Non-local means (NLM) with FSS (NLM-FSS) produces a more satisfactory denoising effect. However, as with many NLMs with WSS (NLM-WSS), center weight is not considered sufficiently. This study shows that window based Wiener filter center weight proposed by Zhang also can improve the NLM-FSS.
The objective of semantic segmentation in microscopic images is to extract the cellular, nuclear or tissue components. This problem is challenging due to the large variations of these components features (size, shape,...
详细信息
暂无评论