Reducing texture details in images
    1.
    发明授权
    Reducing texture details in images 失效
    降低图像中的纹理细节

    公开(公告)号:US07102638B2

    公开(公告)日:2006-09-05

    申请号:US10392000

    申请日:2003-03-19

    IPC分类号: G09G5/02

    CPC分类号: G06T11/00 G06T15/02

    摘要: A method generates an image with de-emphasized textures. Each pixel in the image is classified as either a silhouette edge pixel, a texture edge pixels, or a featureless pixel. A mask image M(x, y) is generated, wherein an intensity of a given pixel (x, y) in the mask image M(x, y) is zero if the pixel (x, y) is classified as the texture edge pixel, is d(x, y) if the pixel (x, y) is classified as the featureless pixel, and is one if the pixel (x, y) is classified as the silhouette edge pixel. An intensity gradient ∇I(x, y) is determined in the masked image, and the intensity gradients in the masked image are integrated according to G(x, y)=∇I(x, y). M(x, y). Then, an output image I′ is generated by minimizing |∇I′−G|, and normalizing the intensities in the output image I′.

    摘要翻译: 方法生成具有去加重纹理的图像。 图像中的每个像素被分类为轮廓边缘像素,纹理边缘像素或无特征像素。 生成掩模图像M(x,y),其中如果像素(x,y)被分类为纹理边缘,则掩模图像M(x,y)中的给定像素(x,y)的强度为零 像素,如果像素(x,y)被分类为无特征像素,则为d(x,y),并且如果像素(x,y)被分类为轮廓边缘像素则为像素(x,y)。 在掩蔽图像中确定强度梯度∇I(x,y),并根据G(x,y)=∇I(x,y)将屏蔽图像中的强度梯度积分。 M(x,y)。 然后,通过最小化|∇I'-G |并且使输出图像I'的强度标准化来生成输出图像I'。

    Enhancing low quality videos of illuminated scenes
    3.
    发明申请
    Enhancing low quality videos of illuminated scenes 失效
    增强照明场景的低质量视频

    公开(公告)号:US20070098288A1

    公开(公告)日:2007-05-03

    申请号:US10392026

    申请日:2003-03-19

    IPC分类号: G06K9/40

    摘要: A method enhances a low quality video. An input video Vjin is acquired of a scene under uncontrolled illumination. The input video Vjin is smoothed to produce a noise-reduced video Sj. Temporal gradients Gtj (x, y) are determined for each frame j of the noise reduced video Sj. The gradients Gtj (x, y) are thresholded to generate a binary mask Mj(x, y). For each frame, weights are determined according Wj (x, y)=F(Mk(x, y), and a spatial gradient field is determined according to Gxyj (x, y). Then, an output video Vjout is constructed from the spatial gradient field Gxyj.

    摘要翻译: 一种方法增强了低质量的视频。 在不受控照明下的场景中获取中的输入视频V 。 平滑了中的输入视频V SUB,以产生噪声降低视频S SUP。 对于降噪视频S SUP的每个帧j确定时间梯度G(x,y)。 阈值化梯度G(x,y)以产生二进制掩码M(x,y)。 对于每个帧,根据W(x,y)= F(M,k)(x,y)确定权重,并且根据G确定空间梯度场 (x,y),然后,从空间梯度构成输出视频V OUT, 字段G j