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。

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。