Device and method for carrying out enhancement and scaling on image details
A detail and image technology, applied in image enhancement, image data processing, graphics and image conversion, etc., can solve the problems of increasing the difficulty of detail extraction, image loss of high-frequency details, limited enhancement effect, etc., to reduce adverse effects and improve image resolution The effect of high efficiency and low cost
Active Publication Date: 2014-05-07
ALI ZHUHAI CORP
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[0004] Existing video image playback devices usually perform detail enhancement after the image is scaled. Due to the low-pass characteristics of the scaler (scaler), the image loses high-frequency details after scaling, which increases the difficulty of detail extraction. When the zoom factor is large The enhancement effect is limited when
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[0063] figure 1 Partial circuits of a conventional video image playback device are shown, including a de-interleaver 1010 and a scaler 1020 . figure 1 The video image playback device can be a TV set or a network multimedia player and the like. The deinterleaver 1010 combines odd fields and even fields of video signals into one frame. The scaler 1020 scales the image of each frame, and unifies various resolutions of the video signal source into a fixed resolution of the video image playback device. The scaler 1020 uses a filter (filter) of 8x4 ports (taps) to perform scaling operations, so it needs 4 lines of data source input, such as figure 1 shown by the four arrows.
[0064] figure 2 A partial circuit of a video image playback device according to an embodiment of the present invention is shown, which includes a deinterleaver 1010 and an image detail enhancement and scaling device 1050, and the image detail enhancement and scaling device 1050 includes an image detail en...
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The invention discloses a device and method for carrying out enhancement and scaling on image details. The device receives data of N rows of pixels of an image, and comprises an image detail enhancer and a scaler. The image detail enhancer adjusts the luminance components of P rows of pixels in the N rows of pixels so as to enhance image details, wherein N and P are both positive integers and N is greater than P. The scaler is coupled with the image detail enhancer and used for scaling the image according to the P rows of pixels subjected to detail enhancement by the image detail enhancer and other N-P rows of pixels which are not subjected to detail enhancement by the image detail enhancer. In the scaling operation, the weighting coefficient of the P rows of pixels subjected to detail enhancement is greater than that of the N-P rows of pixels which are not subjected to detail enhancement.
Description
technical field [0001] The invention relates to an image detail enhancement and scaling device and a corresponding method. And in particular, it relates to an image detail enhancement and scaling device that performs detail enhancement before image scaling (scaling), and its corresponding method. Background technique [0002] Low-resolution video images captured by electronic devices such as cameras or video cameras are often not as clear as what the human eye sees. Especially after the image is scaled, for example, after the image is enlarged from a standard-definition picture to a high-definition picture, the edge details of the image will be more blurred. [0003] In order to make the edge details of the video image consistent with what the human eye sees, the detail enhancement technology of the video image is already indispensable. Image detail enhancement requires many complex operations. In order to reduce costs, there is always a trend to simplify detail enhancemen...
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IPC IPC(8): G06T5/00G06T3/00
Inventor 廖汝鹏文锦松高峰
Owner ALI ZHUHAI CORP