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Motion vector detector for frame rate conversion and method thereof

A displacement vector and detector technology, applied in the direction of standard transformation, interpolation processing transformation, instruments, etc., can solve problems such as broken images, displacement artifacts, image destruction, etc.

Inactive Publication Date: 2005-02-09
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
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Problems solved by technology

[0008] However, when the median filter detects MVs near the object boundary in an area with almost no displacement, such as the background, because the median filter gets the wrong (inaccurate) MV, it will cause displacement artifacts (such as broken images)
More precisely, as shown in Figures 2A and 2B, the image is corrupted at the boundaries of objects connected to the background

Method used

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  • Motion vector detector for frame rate conversion and method thereof
  • Motion vector detector for frame rate conversion and method thereof
  • Motion vector detector for frame rate conversion and method thereof

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Embodiment Construction

[0025] Embodiments of the general inventive concept of the present invention are set forth in detail below, examples are illustrated in the drawings, in which like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0026] 3 is a block diagram of a displacement vector detector according to an embodiment of the present invention. With reference to Fig. 3, displacement vector detector can comprise displacement estimation unit 301, storage unit 302, mean absolute error (MAE) variance value calculator (MAE variance value unit) 303, comparison unit 304, median filter 305, and Select cell 306 .

[0027] The displacement estimating unit 301 may estimate the displacement of the current frame of the input image signal with respect to each predetermined block using the previous frame and the current frame of the input image signal. The predetermined block size may be 8x8 or 1...

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Abstract

An apparatus for and a method of detecting a motion vector (MV) by selectively using a median filter according to a correlation between blocks in a frame rate conversion of an image signal. The apparatus includes first and second motion vector detection units. The first motion vector detection unit performs motion estimation on a reference block to detect a motion vector as a final MV of the reference block if a location of the reference block in the present frame of an input image signal belongs to an object's boundary area adjacent to an image area in which a motion scarcely exists. The second motion vector detection unit performs median-filtering the MV of the reference block to detect a medial MV as the final MV of the reference block if the location of the reference block does not belong to the object's boundary facing the area in which the motion scarcely exists. Thus, the occurrence of motion artifacts due to the median filter can be prevented.

Description

technical field [0001] The invention relates to a displacement vector detector for image signal frame rate conversion, and a related implementation method, in particular to a device and method for detecting displacement vectors using a median filter. Background technique [0002] Frame rate conversion is performed on the image signal to make the image signal compatible with different television standards. In the early days, frame rate conversion was done by frame repetition or using simple spatio-temporal filters. However, this frame rate conversion can cause jittering of displaced images or blurring of image edges. [0003] Therefore, a method for converting the frame rate using displacement compensation is proposed. In order to compensate for the displacement of the input image signal, a displacement vector (MV) is generated by estimating the displacement of the input image signal. [0004] Typically, the MV is generated by displacement estimation using a block matching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24G06T5/20G06T7/20H04N5/14H04N7/01
CPCG06T2207/10016G06T5/20H04N5/145G06T7/2013H04N7/014G06T7/223H04N19/115H04N19/51
Inventor 闵钟术
Owner SAMSUNG ELECTRONICS CO LTD