Image scaling method based on content awareness

An image scaling and content-aware technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as loss and distortion of image information

Active Publication Date: 2016-04-13
HEBEI UNIV OF TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a content-aware image scaling method, which uses a hybrid feature model (hereinafter referred to as HFPM) that combines saliency maps, edge line maps, and gradient maps to obtain an energy function, and performs line scaling accord

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Embodiment

[0105] In the content-aware-based image scaling method of this embodiment, an energy function is obtained by using a mixed feature model that fuses a saliency map, an edge line map, and a gradient map, and a line clipping operation is performed according to the energy function to complete image scaling. The steps are as follows:

[0106] The first step, input color image preprocessing:

[0107] Input the original color image to the computer through the USB interface, and input the size of the target image, and convert the obtained original color image O from the RGB space to the gray space to obtain the gray image I. The formula (1) adopted is as follows:

[0108] I=0.299R+0.587G+0.114B (1),

[0109] Among them, R, G, and B are the red, green and blue channels of the RGB space image respectively, while retaining the original color image O of the original input RGB space, which is used for the calculation of the Context-Aware algorithm in the second step. The input original col...

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Abstract

The invention relates to an image scaling method based on content awareness, and relates to graphic image conversion in an image plane. An energy function is obtained by adopting a hybrid feature model fusing a salient map, an edge line map and a gradient map, and according to the energy function, a line clipping operation is carried out to complete image scaling. The image scaling method comprises the steps of: inputting a color image to carry out preprocessing; simultaneously carrying out extraction of the salient map and a salient target image of an original color image, extraction of the edge map of a gray scale image, which is fused with line information, and extraction of the gradient map of the gray scale image; fusing three feature maps by utilizing an HFPM (hybrid feature model) algorithm so as to obtain the energy function; and clipping the original image by using a line clipping algorithm. The method disclosed by the invention overcomes the defects that an existing line clipping method adopts a gradient map definition energy function of an image and still causes distortion and loss of partial image information in the image scaling process.

Description

technical field [0001] The technical solution of the present invention relates to graphic image conversion in an image plane, in particular to an image scaling method based on content perception. Background technique [0002] With the rapid development of computer science and technology, information home appliances have brought great convenience to our lives. Since different information home appliances do not have uniform size specifications, the size of the required display image and the size of the information home appliance display device exist. The difference, so that the image is displayed abnormally in the display device, and the research on image scaling technology will help to solve the above problems. [0003] One of the traditional image scaling methods is to obtain an image of the target size through interpolation and downsampling. Although the principle of this algorithm is simple and easy to implement, it has the following defects: First, when it is necessary to...

Claims

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Application Information

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IPC IPC(8): G06T3/40G06T7/00
CPCG06T3/403G06T2207/20152G06T2207/20221
Inventor 张婷婷刘依于明于洋师硕翟艳东李航
Owner HEBEI UNIV OF TECH
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