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    Method for contrast enhancement in colour digital image
    1.
    发明公开
    Method for contrast enhancement in colour digital image 有权
    Verfahren zur Kontrastverbesserung在digitalen Farbbildern

    公开(公告)号：EP1326209A1

    公开(公告)日：2003-07-09

    申请号：EP01830803.1

    申请日：2001-12-24

    Applicant: STMicroelectronics S.r.l.

    Inventor： Castorina, Alfio ,  Mancuso, Massimo ,  Battiato, Sebastiano

    IPC: G06T5/40

    CPC classification number: G06T5/008 ,  G06T5/40 ,  G06T2207/10024

    Abstract: A method for improving the quality of a digital image acquired with a non-optimal exposure. The method, which is applied directly to the image in CFA (Colour Filter Array) format, identifies the regions of the image that are most important from the perceptive or contentual point of view by means of simple statistical measures. The image is then transformed by inverting the response function in such a manner as to optimize the quality of these regions.

    Abstract translation: 一种用于改善以非最佳曝光获取的数字图像的质量的方法。 该方法直接应用于CFA（彩色滤镜阵列）格式的图像，通过简单的统计测量方法，从感知或内容的角度来识别图像中最重要的区域。 然后通过以使优化这些区域的质量的方式反转响应函数来变换图像。

    A method for merging digital images to obtain a high dynamic range digital image
    2.
    发明公开
    A method for merging digital images to obtain a high dynamic range digital image 有权
    具有更宽的动态范围，一种用于产生数字图像的数字图像的方法混合

    公开(公告)号：EP1313066A8

    公开(公告)日：2003-09-10

    申请号：EP01830713.2

    申请日：2001-11-19

    Applicant: STMicroelectronics S.r.l.

    Inventor： Castorina, Alfio ,  Mancuso, Massimo ,  Battiato, Sebastiano

    IPC: G06T5/50

    CPC classification number: G06T5/50 ,  G06T2207/20208

    Abstract: A method of processing digital source images, each represented by pixel matrices, to obtain from two or more source images, representing one and the same real scene and acquired by utilizing different exposure levels, a final digital image capable of reproducing the real scene with an exposure latitude greater than that of each of the source images. The method, which can be advantageously used in digital still cameras, produces the final image by combining the source images with the help of a weighted mean constructed pixel by pixel. Thanks to a special filtering to which the weighting coefficients are subjected before the weighted mean operation, the method obtains a final image in which the source images are harmoniously combined with each other. A variant of the method can also be applied directly to digital images in CFA (Colour Filter Array) format.

    Digital image processing method for adaptive sharpening
    5.
    发明公开
    Digital image processing method for adaptive sharpening 审中-公开
    Verfahren zur DigitalbildbearbeitungfüradaptersSchärfen

    公开(公告)号：EP1486916A1

    公开(公告)日：2004-12-15

    申请号：EP03425388.0

    申请日：2003-06-13

    Applicant: STMicroelectronics S.r.l.

    Inventor： Battiato, Sebastiano ,  Castorina, Alfio ,  Guarnera, Mirko ,  Vivirito, Paolo

    IPC: G06T5/00 ,  G06T5/20 ,  G06T9/00

    CPC classification number: G06T5/004 ,  G06T5/20 ,  G06T9/00

    Abstract: A method (Q_Impr) for processing a first digital image, comprising an operation (A_Sharp) of increasing the sharpness of said digital image.
    The method is characterized in that the operation of increasing the sharpness (A_Sharp) is of the adaptive type and includes an operation of associating (TD_Ev) with pixel (p i (x,y)) of the starting image respective local homogeneity measures (k(x,y)), and an operation of providing pixel (p 0 (x,y)) of a second digital image by modifying respective pixels (p i (x,y)) of the first digital image on the basis of said respective local homogeneity measures (k(x,y)).

    Abstract translation: 一种用于处理第一数字图像的方法（Q_Impr），包括增加所述数字图像的锐度的操作（A_Sharp）。 该方法的特征在于，增加锐度（A_Sharp）的操作是自适应类型的操作，并且包括将起始图像相应的局部均匀性（TD_Ev）与像素（pi（x，y））相关联的操作 （k（x，y））以及通过基于第一数字图像修改第一数字图像的各个像素（pi（x，y））来提供第二数字图像的像素（p0（x，y））的操作 表示各自的本地均匀性度量（k（x，y））。

    Color interpolation method based on directional filtering of an image acquired by a digital sensor
    7.
    发明公开
    Color interpolation method based on directional filtering of an image acquired by a digital sensor 审中-公开
    基于Farbinterpolationsverfahren用数字传感器所拍摄的图像的方向依赖滤波器

    公开(公告)号：EP1643441A1

    公开(公告)日：2006-04-05

    申请号：EP05108265.9

    申请日：2005-09-08

    Applicant: STMicroelectronics S.r.l.

    Inventor： Messina, Giuseppe ,  Guarnera, Mirko Ignazio ,  Tomaselli, Valeria ,  Bruna, Arcangelo Ranieri ,  Spampinato, Giuseppe ,  Castorina, Alfio

    IPC: G06T3/40 ,  G06T5/00 ,  G06T5/20

    CPC classification number: G06T3/4015

    Abstract: Subdivision per basic color channels of grey level data generated by a color sensor is no longer required according to a novel color interpolation method of an image acquired by a digital color sensor generating grey levels for each image pixel in function of the filter applied to the sensor, by interpolating the values of missing colors of each image pixel for generating triplets or pairs of values of primary colors (RGB) or complementary hues for each image pixel. The method comprises the following steps:

    i) calculating spatial variation gradients of primary colors or complementary hues for each image pixel and storing the information of directional variation of primary color or complementary hue in look-up tables pertaining to each pixel;
    ii) interpolating color values of each image pixel considering said directional variation information of the respective values of primary colors or complementary hues stored in the respective look-up tables of the pixel for generating said multiple distinct values for each image pixel.

    Abstract translation: 每通过一个颜色传感器产生的灰度级数据的基本颜色通道分区不再需要雅丁施加到传感器由数字彩色传感器生成在过滤器的功能对于每个图像像素的灰度级获取的图像的新颖的色彩插值方法 ，通过内插每个图像像素的颜色缺失的值，用于产生原色（RGB）或互补的色调值的三元组或对每个图像像素。 该方法包括以下步骤：i）计算的基色的或互补的色调空间变化梯度为每个图像像素和存储在属于每个像素查找表原色或互补色调的定向变化的信息; ⅱ）内插考虑的原色或存储在像素的respectivement查找表为每个图像像素产生所述多个不同值的色调互补的respectivement值的所述定向变化信息的每个图像像素的色彩值。

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