公开(公告)号：US09123103B2

公开(公告)日：2015-09-01

申请号：US14141416

申请日：2013-12-26

Applicant: MEDIATEK INC.

Inventor： Ding-Yun Chen ,  Chi-Cheng Ju ,  Cheng-Tsai Ho

IPC: G06K9/40 ,  G06T5/00 ,  G06T5/10 ,  G06T5/20

CPC classification number: G06T5/002 ,  G06T5/10 ,  G06T5/20 ,  G06T2207/10004 ,  G06T2207/20024 ,  G06T2207/20052 ,  G06T2207/20182

Abstract: A method for denoising images by block-matching three-dimensional (BM3D) method is disclosed in the present invention. Embodiments of the present invention are used to improve the quality of captured images. Instead of using the same noise variance to denoise all patches of an image, each patch is processed based on a particular assessed noise variance. The assessed noise variance of one reference patch is determined based on noise variance associated with the patch set or based on content characteristics associated with the patch set. The patch set is obtained by block-matching to find similar patches of the reference patch. Noise reduction in frequency domain is applied to the patch set according to the assessed noise variance of the reference patch. The determining of the assessed noise variance can be performed in spatial domain or in frequency domain.

Abstract translation: 在本发明中公开了一种通过块匹配三维（BM3D）方法对图像进行去噪的方法。 本发明的实施例用于提高拍摄图像的质量。 代替使用相同的噪声方差去除图像的所有斑块，每个贴片将根据特定的评估噪声方差进行处理。 基于与补丁集合相关联的噪声方差或基于与补丁集相关联的内容特征来确定一个参考补丁的估计噪声方差。 通过块匹配获得补丁集，以查找参考补丁的相似补丁。 根据评估的参考补丁的噪声方差，将频域的降噪应用于补丁集。 评估噪声方差的确定可以在空间域或频域中进行。

公开(公告)号：US20140254689A1

公开(公告)日：2014-09-11

申请号：US14201950

申请日：2014-03-10

Applicant: MEDIATEK INC.

Inventor： Cheng-Tsai Ho ,  Chi-Cheng Ju ,  Ding-Yun Chen

IPC: H04N19/46

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/154 ,  H04N19/18 ,  H04N19/196 ,  H04N19/46

Abstract: A video coding method includes at least the following steps: utilizing a visual quality evaluation module for evaluating visual quality based on data involved in a coding loop; and referring to at least the evaluated visual quality for deciding a target bit allocation of a rate-controlled unit in video coding. Besides, a video coding apparatus has a visual quality evaluation module, a rate controller and a coding circuit. The visual quality evaluation module evaluates visual quality based on data involved in a coding loop. The rate controller refers to at least the evaluated visual quality for deciding a target bit allocation of a rate-controlled unit. The coding circuit has the coding loop included therein, and encodes the rate-controlled unit according to the target bit allocation.

Abstract translation: 视频编码方法至少包括以下步骤：利用视觉质量评估模块，用于基于编码环路中涉及的数据来评估视觉质量; 并且至少参考用于决定视频编码中的速率控制单元的目标比特分配的评估的可视质量。 此外，视频编码装置具有视觉质量评估模块，速率控制器和编码电路。 视觉质量评估模块基于编码循环中涉及的数据来评估视觉质量。 速率控制器至少指定用于确定速率控制单元的目标比特分配的评估的可视质量。 编码电路包括编码环，并根据目标比特分配对速率控制单元进行编码。

公开(公告)号：US20140254662A1

公开(公告)日：2014-09-11

申请号：US14195868

申请日：2014-03-04

Applicant: MEDIATEK INC.

Inventor： Cheng-Tsai Ho ,  Chi-Cheng Ju ,  Ding-Yun Chen

IPC: H04N19/119 ,  H04N19/126

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/154 ,  H04N19/18 ,  H04N19/196 ,  H04N19/46

Abstract: One video coding method includes at least the following steps: utilizing a visual quality evaluation module for evaluating visual quality based on data involved in a coding loop; and referring to at least the evaluated visual quality for performing de-blocking filtering. Another video coding method includes at least the following steps: utilizing a visual quality evaluation module for evaluating visual quality based on data involved in a coding loop; and referring to at least the evaluated visual quality for deciding a target coding parameter associated with de-blocking filtering.

Abstract translation: 一种视频编码方法至少包括以下步骤：利用视觉质量评估模块基于编码环路中涉及的数据来评估视觉质量; 并且至少参考用于执行去块过滤的评估的视觉质量。 另一种视频编码方法至少包括以下步骤：利用视觉质量评估模块基于编码环路中涉及的数据来评估视觉质量; 并且至少参考用于决定与去块过滤相关联的目标编码参数的评估的可视质量。

公开(公告)号：US20130314580A1

公开(公告)日：2013-11-28

申请号：US13868072

申请日：2013-04-22

Applicant: MEDIATEK INC.

Inventor： Chi-Cheng Ju ,  Ding-Yun Chen ,  Cheng-Tsai Ho

IPC: H04N5/232

CPC classification number: H04N5/23293 ,  G06T3/40 ,  G06T3/4007 ,  G06T3/4023 ,  G06T3/4053 ,  G06T5/003 ,  G06T7/0002 ,  G06T2207/10016 ,  G06T2207/20192 ,  G06T2207/30168 ,  G06T2207/30201 ,  H04N5/23222 ,  H04N5/23248 ,  H04N5/23254 ,  H04N5/772 ,  H04N9/79

Abstract: A preview system of an image capture apparatus has a processing circuit and a display apparatus. The processing circuit reads an input image, scales at least a portion of the input image to generate a first preview image, and derives a second preview image from a selected portion of the input image. The display apparatus displays the first preview image and the second preview image, concurrently. Besides, a preview method for an image capture apparatus includes at least the following steps: reading an input image; scaling at least a portion of the input image to generate a first preview image; deriving a second preview image from a selected portion of the input image; and displaying the first preview image and the second preview image on a display apparatus, concurrently.

Abstract translation: 图像捕获装置的预览系统具有处理电路和显示装置。 处理电路读取输入图像，缩放输入图像的至少一部分以生成第一预览图像，并从输入图像的选定部分导出第二预览图像。 显示装置同时显示第一预览图像和第二预览图像。 此外，图像拍摄装置的预览方法至少包括以下步骤：读取输入图像; 缩放所述输入图像的至少一部分以生成第一预览图像; 从所述输入图像的所选部分导出第二预览图像; 并且同时在显示装置上显示第一预览图像和第二预览图像。