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Method for evaluating adjustable fidelity based on content relevant image dimension

A technology of image size and evaluation method, which is applied in image enhancement, image data processing, graphics and image conversion, etc. It can solve problems such as tedious, difficult to copy, and difficult to automate operations, and achieve accurate evaluation effects and reduce delays.

Inactive Publication Date: 2008-12-24
TSINGHUA UNIV
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Problems solved by technology

However, such psychophysical experiments obviously have disadvantages such as tedious, expensive, long cycle, difficult to automate and difficult to replicate.

Method used

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  • Method for evaluating adjustable fidelity based on content relevant image dimension
  • Method for evaluating adjustable fidelity based on content relevant image dimension
  • Method for evaluating adjustable fidelity based on content relevant image dimension

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Embodiment Construction

[0034] According to the above-mentioned first main purpose, the present invention provides a method for evaluating image fidelity, comprising the following steps:

[0035] A uses the energy function that needs to be evaluated to perform content-dependent size scaling on pre-selected images through the seam carving algorithm.

[0036] B finds the corresponding points in the original image in the latter image.

[0037] C compares the latter image with the original image, and obtains the fidelity evaluation result of the energy function according to the comparison result.

[0038] The content-related scaling of the image in step A is as follows: After selecting the subject content to be retained on the image, using the energy function to be evaluated, the image is scaled to any size based on the subject content through the seam carving algorithm.

[0039] Find the corresponding relationship between the positions of the points on the original image and the subsequent image as des...

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Abstract

The invention relates to a fidelity evaluation method based on the scale adjustment of content relevant images, and pertains to image fidelity evaluation technology. The invention is characterized in that: the evaluation method comprises the steps as follows: A. content relevant scale zooming is carried out to a pre-selected image by an energy function needed to be evaluated and through a seam carving algorithm; B. the corresponding points of the original image are searched in the adjusted image; C. the adjusted image is compared with the original image, and the evaluation result of the fidelity of the energy function is obtained according to the comparative results. The invention also discloses an image fidelity evaluation system for different energy functions by the seam carving algorithm, and the fidelity evaluation system comprises a reference image database, a seam carving algorithm unit and a fidelity evaluation unit. The technical proposal of the invention can evaluate the fidelity of the content relevant scale changed image, thus realizing the fidelity evaluation of the content relevant scale changed image under different energy functions of the image.

Description

technical field [0001] The invention relates to image fidelity evaluation technology, in particular to an image fidelity evaluation method based on content-dependent size adjustment technology. Background technique [0002] In modern society, we are exposed to more and more display screens. There is a wide range of sizes from small ones such as camera screens and mobile phone screens to large ones such as computer monitors and movie screens, and the aspect ratios are also different. Therefore, it is required that the same image can be changed into different sizes and displayed on screens with different sizes and different aspect ratios. Existing technologies use simple image stretching or cropping. For screens with the same aspect ratio, using stretching is still good, but for screens with different aspect ratios, it will cause image subject content to be deformed or lose information. Today, when digital TV and smart phones are gradually popularized, such a result is unsat...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T3/40
Inventor 刘永进姜昌浩钟力立丁剑飞
Owner TSINGHUA UNIV
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