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    Color interpolation using data dependent triangulation
    1.
    发明公开
    Color interpolation using data dependent triangulation 有权
    Farbinterpolation mitdatenabhängiger三角测量

    公开(公告)号：EP1622393A1

    公开(公告)日：2006-02-01

    申请号：EP04425587.5

    申请日：2004-07-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： Spampinato, Giuseppe ,  Messina, Giuseppe ,  Bruna, Arcangelo Ranieri ,  Guarnera, Mirko

    IPC: H04N9/04 ,  G06T3/40

    CPC classification number: G06T3/4015 ,  H04N9/045 ,  H04N2209/046

    Abstract: A fast method of color interpolation of pixels of an image acquired by a color filtered digital sensor uses a very simple cost function that nevertheless produce interpolated images of good quality. The cost function is computationally simpler because it does not require the calculation of powers and square roots.
    An efficient triangulation algorithm that may be executed in far less time than prior art triangulation processes, while practically ensuring the same performances. The peculiarity of this triangulation algorithm consists in that on average it requires only two iteration steps, while the most accurate prior triangulation algorithm is completed only after four iteration steps.
    Optionally, the interpolation process may be followed by an anti-aliasing processing that effectively removes color artifacts that may be created during the interpolation process.

    Abstract translation: 由彩色滤波数字传感器获取的图像的像素的彩色插值的快速方法使用非常简单的成本函数，其仍然产生良好质量的内插图像。 成本函数在计算上更简单，因为它不需要功率和平方根的计算。 一种有效的三角测量算法，可以在比现有技术的三角测量过程更少的时间内执行，同时实际确保相同的性能。 这种三角测量算法的特点在于，平均来说，它只需要两个迭代步骤，而最精确的先验三角测量算法仅在四个迭代步骤之后完成。 可选地，内插处理之后可以是抗锯齿处理，其有效地消除可能在插值处理期间产生的颜色伪像。

    Processing method for obtaining a high-resolution digital image
    3.
    发明公开
    Processing method for obtaining a high-resolution digital image 有权
    Verfahren zur Herstellung von Digital-Bildern mit hoherAuflösung

    公开(公告)号：EP1372335A1

    公开(公告)日：2003-12-17

    申请号：EP02425382.5

    申请日：2002-06-12

    Applicant: STMicroelectronics S.r.l.

    Inventor： Messina, Giuseppe ,  Mancuso, Massimo ,  Battiato, Sebastiano

    IPC: H04N1/40 ,  H04N7/01

    CPC classification number: G06T3/4053 ,  G06T3/4015 ,  H04N5/349

    Abstract: A method for obtaining a high-resolution digital image from a plurality of starting images P,S formed by pixel matrices and acquired at a lower resolution. The method comprises a phase of combining the plurality of starting images P,S to generate a provisional high-resolution image HR (0) formed by a pixel matrix.
    The method also comprises a calculation phase to associate a respective error with at least a part of the pixels of the provisional image HR (0) , said calculation phase providing a first error associated with at least one first pixel, and a phase of at least partially processing the provisional image by modifying the pixels of this image on the basis of the respective errors associated with them.
    The method is characterized by the fact that the calculation phase includes the phase of:

    calculating a second error to associate with at least one second pixel situated in the vicinity of said first pixel in the matrix ( HR (0) ), said second error being calculated by using the first error associated with said at least one first pixel.

    Abstract translation: 一种从由像素矩阵形成并以较低分辨率获取的多个起始图像P，S获得高分辨率数字图像的方法。 该方法包括组合多个起始图像P，S以产生由像素矩阵形成的临时高分辨率图像HR <（0）>的相位。 该方法还包括用于将相应误差与临时图像HR <（0）>的像素的至少一部分相关联的计算阶段，所述计算阶段提供与至少一个第一像素相关联的第一误差， 以及通过基于与它们相关联的各个错误修改该图像的像素来至少部分地处理临时图像的相位。 该方法的特征在于计算阶段包括以下相位：计算第二误差以与位于矩阵中的所述第一像素附近的至少一个第二像素相关联（HR <（0）> ），通过使用与所述至少一个第一像素相关联的第一误差来计算所述第二误差。

    Color interpolation method based on directional filtering of an image acquired by a digital sensor
    5.
    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。

    Method and system for demosaicing artifact removal
    9.
    发明公开
    Method and system for demosaicing artifact removal 审中-公开
    Verfahren und System zur Reduktion von aus“Demosaicing”erzeugten Artefakten

    公开(公告)号：EP1650979A1

    公开(公告)日：2006-04-26

    申请号：EP04025002.9

    申请日：2004-10-21

    Applicant: STMicroelectronics S.r.l.

    Inventor： Guarnera, Mirko Ignazio ,  Messina, Giuseppe ,  Tomaselli, Valeria

    IPC: H04N9/04

    CPC classification number: H04N9/045 ,  H04N2209/045 ,  H04N2209/046

    Abstract: Color image signals, as derived e.g. by interpolating the output from a color filter array (CFA) are arranged in pixels, each pixel having associated detected (10) color information for a first color as well as undetected filled-in (20) color information for at least a second and a third color. The images are thus exposed to false color and zipper effect artifacts, and are subject to processing preferably including the steps of:

    checking (30) the images for the presence of zipper effect artifacts, and

    i) if said checking (30) reveals the presence of zipper effect artifacts, applying a zipper effect removal process (50) to said image signals;
    ii) if said checking (30) fails to reveal the presence of zipper effect artifacts, applying a false color removal process (40) to said image signals.


    False color and zipper effect artifacts are thus preferably both reduced by adaptively using the zipper effect removal process (50) and the false color removal process (40).

    Abstract translation: 彩色图像信号，如 通过内插来自滤色器阵列（CFA）的输出以像素排列，每个像素具有用于第一颜色以及未检测到的填充（20）颜色信息的相关联的检测（10）颜色信息，用于至少第二和第二颜色信息 第三色。 因此，图像暴露于虚假的颜色和拉链效应伪影，并且经受处理优选地包括以下步骤：检查（30）图像中是否存在拉链效果人造物，以及i）如果所述检查（30）揭示存在 拉链效果伪影，对所述图像信号应用拉链效应去除处理（50）; ii）如果所述检查（30）不能显示拉链效应伪影的存在，则对所述图像信号应用假色移除处理（40）。 因此，优选通过自适应地使用拉链效果去除处理（50）和假色去除处理（40）来减少假色和拉链效果伪影。

    Method for obtaining a high-resolution digital image
    10.
    发明公开
    Method for obtaining a high-resolution digital image 有权
    Vwefahren zur Erfassung eines digitalen Bildsatzes mit hoherAuflösung

    公开(公告)号：EP1357514A1

    公开(公告)日：2003-10-29

    申请号：EP02425262.9

    申请日：2002-04-23

    Applicant: STMicroelectronics S.r.l.

    Inventor： Messina, Giuseppe ,  Battiato, Sebastiano ,  Mancuso, Massimo

    IPC: G06T3/40

    CPC classification number: G06T3/4076

    Abstract: A method of obtaining a high-resolution digital image from a plurality of starting images formed by pixel matrices and acquired at a lower resolution. The method comprises a phase of combining the plurality of starting images to generate a provisional high-resolution image. The method thereafter comprises a phase of producing a further plurality of low-resolution images from the provisional image, each of the images of said further plurality corresponding to a respective image of the plurality of starting images.
    The method also comprises a phase in which the provisional image is at least partly processed by modifying pixels of this image to reduce a difference between corresponding images of the plurality of starting images and said further plurality and is characterized by the fact the phase of processing the provisional image comprises phases of:

    associating pixels of the provisional image with a respective measure representing the uncertainty of the pixels,
    leaving unmodified at least a subset of pixels of the provisional image with which there is associated a respective uncertainty measure smaller than a predetermined threshold value.

    Abstract translation: 一种从由像素矩阵形成并以较低分辨率获取的多个起始图像中获得高分辨率数字图像的方法。 该方法包括组合多个起始图像以产生临时高分辨率图像的相位。 此后的方法包括从临时图像产生另外多个低分辨率图像的相位，所述另外多个的每个图像对应于多个起始图像的相应图像。 该方法还包括其中通过修改该图像的像素来至少部分地处理临时图像的相位，以减少多个起始图像和所述多个起始图像的对应图像之间的差异，并且其特征在于， 处理临时图像的阶段包括以下阶段：将临时图像的像素与表示像素的不确定性的相应测量相关联，留下未修改的临时图像的至少一个子集，其中相关联的不确定性度量小于 预定阈值。

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