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公开(公告)号：US20060104531A1
公开(公告)日：2006-05-18
申请号：US11219621
申请日：2005-09-02
申请人： Stewart Smith , Arcangelo Bruna , Filippo Vella
发明人： Stewart Smith , Arcangelo Bruna , Filippo Vella
IPC分类号： G06K9/38
CPC分类号： H04N19/192 , H04N19/115 , H04N19/124 , H04N19/146 , H04N19/15 , H04N19/182
摘要： A method for image compression of a set of image data includes performing a quantization operation on the image data. The quantization operation may include controlling a compression factor by applying a scaled quantization level obtained by multiplying a first quantization level by a gain factor. The gain factor may be updated as a function of a bit per pixel value of a compressed image. The update operation may include an iterative procedure including at least one iteration step that provides for updating a current gain factor as a function of a previous gain used for performing a previous compression step and as a function of a ratio of the bit per pixel value of the compressed image at the previous compression step to a target bit per pixel value. The method may be used in Joint Photographic Experts Group (JPEG) image processing and digital still cameras.
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2.发明申请Method and architecture for compressing image data acquired from a bayer color filter array 有权用于压缩从拜耳滤色器阵列获取的图像数据的方法和架构公开(公告)号：US20060013314A1
公开(公告)日：2006-01-19
申请号：US11146469
申请日：2005-06-07
申请人： Filippo Vella , Arcangelo Bruna , Antonio Buemi
发明人： Filippo Vella , Arcangelo Bruna , Antonio Buemi
CPC分类号： H04N19/119 , H04N19/124 , H04N19/136 , H04N19/17 , H04N19/176 , H04N19/51 , H04N19/94
摘要： For each color channel, the process includes gathering Bayer pattern pixel values by pairs, each pair being composed by two successive pixels belonging to the channel along the scanning direction of the pixels of the image, thus each pair of values representing a current input vector, and calculating a predictor vector of the input vector in terms of the differences between the values defining the input vector and a pair of prediction values generated according to a certain criterion, for representing a prediction error. The process further includes quantizing each so calculated predictor vector according to a heavier or lighter degree of quantization depending on whether the predictor vector is representative of an area of relatively uniform color of the image or of an area of relatively abrupt changes of colors of the image, and generating a multibit code representative of the quantized predictor vector of the input vector according to a certain compression ratio.
摘要翻译： 对于每个颜色通道，该处理包括通过成对地收集拜耳图案像素值，每对由属于沿着图像的像素的扫描方向的通道的两个连续像素组成，因此每对值表示当前输入向量， 以及根据定义输入向量的值和根据某一标准生成的一对预测值之间的差异来计算输入向量的预测矢量，用于表示预测误差。 该过程还包括根据预测矢量是否表示图像的相对均匀的颜色的区域或图像的颜色相对突然变化的区域，根据更重或更轻的量化量化每个所计算的预测矢量 并且根据一定的压缩率生成代表输入向量的量化预测矢量的多位代码。
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公开(公告)号：US20060098732A1
公开(公告)日：2006-05-11
申请号：US11267077
申请日：2005-11-04
申请人： Arcangelo Bruna , Luca Celetto
发明人： Arcangelo Bruna , Luca Celetto
CPC分类号： H04N19/124 , H04N19/137 , H04N19/14 , H04N19/176 , H04N19/194 , H04N19/45 , H04N19/61
摘要： The method for block coding data, such as video data, via a compression operation includes applying to input-data blocks a discrete-cosine-transform (DCT) operation and a quantization operation to produce compressed-data blocks. The compressed-data blocks are subjected to a coding operation to obtain compressed output flows; and an inverse-quantization operation and an inverse-discrete-cosine-transform (IDCT) operation are applied on the compressed-data blocks to obtain reconstructed blocks. The method includes controlling generation of mismatch errors from the input-data blocks by detecting data blocks from the input-data blocks and compressed-data blocks that are liable to cause mismatch errors, and modifying the blocks that are liable to cause mismatch errors prior to the coding operation.
摘要翻译： 用于通过压缩操作对数据（诸如视频数据）进行数据块编码的方法包括：向输入数据块应用离散余弦变换（DCT）操作和量化操作以产生压缩数据块。 对压缩数据块进行编码操作以获得压缩的输出流; 并且在压缩数据块上应用逆量化操作和逆离散余弦变换（IDCT）操作以获得重构块。 该方法包括通过检测来自输入数据块的数据块和容易引起不匹配错误的压缩数据块来控制来自输入数据块的失配错误的产生，以及修改易于引起不匹配错误的块， 编码操作。
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公开(公告)号：US07116832B2
公开(公告)日：2006-10-03
申请号：US09901458
申请日：2001-07-09
CPC分类号： H04N19/94 , H04N19/126 , H04N19/14 , H04N19/15 , H04N19/18 , H04N19/182 , H04N19/186 , H04N19/196 , H04N19/60
摘要： A method is for compressing a digital image including a matrix of elements, with each element including at least one component of a different type for representing a pixel. The method includes splitting the digital image into a plurality of blocks, and calculating for each block a group of discrete cosine transform (DCT) coefficients for the components of each type, and quantizing the DCT coefficients of each group using a corresponding quantization table scaled by a gain factor for achieving a target compression factor. The method also includes further quantizing the DCT coefficients of each group using the corresponding quantization table scaled by a pre-set factor, and arranging the further quantized DCT coefficients in a zig-zig vector.
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公开(公告)号：US20050276510A1
公开(公告)日：2005-12-15
申请号：US11148850
申请日：2005-06-08
申请人： Angelo Bosco , Arcangelo Bruna
发明人： Angelo Bosco , Arcangelo Bruna
CPC分类号： H04N5/3675 , G06T5/002 , G06T5/005 , G06T5/20 , G06T7/0004 , G06T2207/10024 , H04N5/217
摘要： A method for correcting an image from defects and filtering from Gaussian noise corrects each pixel of the image when it is considered defective and filters it from Gaussian noise in one-pass. The one-pass improves the speed for performing the correcting and filtering. The drawbacks associated with choosing incompatible defect correction and filtering operations are overcome.
摘要翻译： 一种从缺陷中校正图像并从高斯噪声滤波的方法，在被认为有缺陷的情况下校正图像的每个像素，并在一次通过时从高斯噪声中对其进行滤波。 单程提高了执行校正和过滤的速度。 克服了选择不兼容的缺陷校正和过滤操作相关的缺点。
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公开(公告)号：US06839467B2
公开(公告)日：2005-01-04
申请号：US09903371
申请日：2001-07-10
IPC分类号： H04N5/232 , H04N5/235 , H04N19/122 , H04N19/126 , H04N19/14 , H04N19/149 , H04N19/18 , H04N19/186 , H04N19/42 , H04N19/60 , G06K9/36
CPC分类号： H04N5/2351 , H04N5/23212 , H04N19/122 , H04N19/126 , H04N19/14 , H04N19/149 , H04N19/18 , H04N19/186 , H04N19/42 , H04N19/60
摘要： A method compresses a digital image including a matrix of elements each one including a plurality of digital components of different type representing a pixel. The method includes the steps of providing an incomplete digital image wherein at least one component is missing in each element, obtaining the digital image from the incomplete digital image, splitting the digital image into a plurality of blocks and calculating, for each block, a group of DCT coefficients for the components of each type, and quantizing the DCT coefficients of each group using a corresponding quantization table scaled by a gain factor for achieving a target compression factor. The method further comprises the steps of determining an energy measure of the incomplete digital image and estimating the gain factor as a function of the energy measure, the function being determined experimentally according to the target compression factor.
摘要翻译： 一种方法压缩包括元素矩阵的数字图像，每个元素矩阵包括表示像素的不同类型的多个数字分量。 该方法包括以下步骤：提供不完整的数字图像，其中每个元素中至少有一个分量丢失，从不完整的数字图像中获取数字图像，将数字图像分割成多个块，并为每个块计算一个组 的每个类型的分量的DCT系数，并且使用由用于实现目标压缩因子的增益因子缩放的相应量化表来量化每个组的DCT系数。 该方法还包括以下步骤：确定不完整数字图像的能量测量值，并根据能量测量值估计增益因子，该功能是根据目标压缩因子实验确定的。
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7.发明申请公开(公告)号：US20060159356A1
公开(公告)日：2006-07-20
申请号：US11295174
申请日：2005-12-05
CPC分类号： H04N19/124 , H04N19/15 , H04N19/194 , H04N19/60
摘要： A method for compression includes applying a discrete cosine transform to said image data to obtain transform coefficients, quantizing the transform coefficients by applying a quantization level scaled through a gain value, adjusting the gain value as a function of desired image parameters by executing a first time said quantization operation applying a first gain value and obtaining first quantized data, estimating statistically a second gain value suitable to obtain the desired image parameters, and executing a second time said quantization operation applying said second gain value. The operation of statistical estimation of the second gain value includes evaluating a threshold value as a function of the desired image parameters and setting to zero a percentage of coefficients of the first quantized data as a function of the threshold value.
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公开(公告)号：US20060050957A1
公开(公告)日：2006-03-09
申请号：US11216764
申请日：2005-08-31
申请人： Filippo Naccari , Alfio Castorina , Arcangelo Bruna , Alessandro Capra , Silvia Cariolo , Sebastiano Battiato , Giovanni Gallo
发明人： Filippo Naccari , Alfio Castorina , Arcangelo Bruna , Alessandro Capra , Silvia Cariolo , Sebastiano Battiato , Giovanni Gallo
IPC分类号： G06K9/00
CPC分类号： G06K9/00664 , G06T7/11 , G06T7/90 , G06T2207/20016
摘要： In the method, the membership image is produced through a multi-stage process that contemplates a first punctual classification stage generating a rough membership image, followed by a low-pass filtering of regionalization of the image through a down-sampling of the image followed by an up-sampling of the image, and in a further step of merging the regions that overcomes the superposition effects induced by the low-pass filtering operation. The so generated membership image contains semantic information of the input image that may be used for effectively implementing an adaptive correction/improvement of the color of the input image. For an adaptive correction/improvement of the color, the encoded data of the generated membership image is fed in parallel to the data of the real image to an adaptive modification block of the color of the image pixels.
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公开(公告)号：US20060022997A1
公开(公告)日：2006-02-02
申请号：US11190571
申请日：2005-07-27
IPC分类号： G09G5/00
CPC分类号： G06T3/4015 , H04N9/045 , H04N2209/046
摘要： 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. The triangulation algorithm may be executed in far less time, while practically ensuring the same performance. The triangulation algorithm on average may use only two iteration steps. The interpolation process may be followed by an anti-aliasing processing that effectively removes color artifacts.
摘要翻译： 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。 三角测量算法可以在更短的时间内执行，同时实际确保相同的性能。 平均三角测量算法只能使用两个迭代步骤。 插值过程之后可以是有效地去除颜色伪影的抗混叠处理。
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10.发明申请Color interpolation method of an image acquired by a digital sensor by directional filtering 有权通过定向滤波由数字传感器获取的图像的颜色插值方法公开(公告)号：US20060072814A1
公开(公告)日：2006-04-06
申请号：US11243212
申请日：2005-10-04
申请人： Giuseppe Messina , Mirko Guarnera , Valeria Tomaselli , Arcangelo Bruna , Giuseppe Spampinato , Alfio Castorina
发明人： Giuseppe Messina , Mirko Guarnera , Valeria Tomaselli , Arcangelo Bruna , Giuseppe Spampinato , Alfio Castorina
CPC分类号： G06T3/4015
摘要： 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 as a 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 or complementary base hues for each image pixel. The method may include calculating spatial variation gradients of primary colors or complementary base hues for each image pixel and storing the information of directional variation of primary color or complementary base hue in look-up tables pertaining to each pixel. The method may further include interpolating color values of each image pixel considering the 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 the multiple distinct values for each image pixel.
摘要翻译： 根据由数字颜色传感器获取的图像的新颖的颜色插值方法，由颜色传感器生成的灰度级数据的每个基本色彩通道的细分作为对每个图像像素生成灰度的函数，作为应用于 通过内插每个图像像素的缺失颜色的值来生成每个图像像素的三元组或原色值或互补基色调的值对。 该方法可以包括计算每个图像像素的原色或互补基色调的空间变化梯度，并将原色或互补基色调的方向变化的信息存储在与每个像素相关的查找表中。 该方法还可以包括考虑存储在像素的各个查找表中的原色或互补色调的各个值的方向变化信息来考虑每个图像像素的颜色值，以生成每个图像像素的多个不同值。
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