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Image resolution conversion method and device, and terminal

A technology of image resolution and conversion method, which is applied in the field of image resolution conversion method, device and terminal, can solve problems such as low conversion efficiency and poor image conversion effect, and achieve the goals of reducing overhead, improving conversion efficiency, and low computational complexity Effect

Inactive Publication Date: 2014-12-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide an image resolution conversion method, device and terminal to solve the problems of low conversion efficiency and poor image conversion effect of the existing embedded system image resolution software

Method used

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  • Image resolution conversion method and device, and terminal
  • Image resolution conversion method and device, and terminal
  • Image resolution conversion method and device, and terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0070] The image resolution conversion device provided in this embodiment can be set in various terminals, please refer to figure 2 As shown, the device includes:

[0071] The primary resolution setting module is used to set the primary resolution to K times the target resolution, and the K is greater than 1; the value of K in this embodiment can be set according to specific selections such as actual application scenarios, such as K The value can be 2, 4, 8, etc.;

[0072] The image data extraction module is used to determine and extract the current image data to be converted; in this embodiment, the image data extraction module can determine and extract the current image data to be converted by any existing extraction method; in this embodiment, In order to further reduce the complexity and amount of calculation in image resolution conversion and improve resource utilization, this embodiment can also first calculate the filter coefficients required for resolution conversion...

Embodiment 2

[0115] In order to better understand the present invention, the present invention will be described below in conjunction with the method flow of image resolution conversion:

[0116] See Figure 7 As shown, image resolution conversion includes the following steps:

[0117] Step 701: Obtain the primary resolution, set the primary resolution to be K times the target resolution, where K is greater than 1;

[0118] Step 702: Obtain the resolution conversion ratio value N / M, and extract the current image data to be converted;

[0119] Step 703: Compare the size of the resolution conversion ratio N / M and 1 / K, if N / M is equal to 1 / K, go to step 704; if N / M is greater than 1 / K, go to step 705; if N / M M is less than 1 / K, go to step 708;

[0120] Step 704: directly perform final conversion on the current image to be converted and output it;

[0121] Step 705: judge whether N / M is equal to 1, if so, go to step 706, otherwise, go to step 707;

[0122] Step 706: directly output the im...

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Abstract

Disclosed are an image resolution conversion method and device, and a terminal. When resolution conversion is performed on an image, firstly, the resolution of an image to be converted can be converted into primary resolution by using relatively simple conversion processing; and then on this basis, the primary resolution is converted into target resolution by using a high-quality image conversion algorithm. Therefore, higher image resolution conversion quality can be obtained under lower calculation complexity, so that the system overhead can be reduced, and the conversion efficiency can be improved. Moreover, experience proves that the picture quality obtained by using the solution of the present invention is essentially close to that of the photoshop. The solution provided in the present invention is applicable to an embedded system and a PC platform.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an image resolution conversion method, device and terminal. Background technique [0002] Resolution conversion is often used in image processing. Currently commonly used image scaling algorithms include simple bilinear interpolation, bicubic linear interpolation, and selective filter difference according to the directionality of the currently processed pixels. [0003] Of the above three methods, the first method is the worst, especially for situations where the conversion factor is relatively large, and the target image obtained by this method is prone to jagged. Theoretically, the third method has the best effect, but since it is necessary to calculate the direction information of each pixel and the surrounding pixels, that is, to calculate its edge direction, this method requires a very large amount of calculation. Currently, unless it is a very professional image Pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00
CPCG06T3/40
Inventor 张本好肖龙安
Owner ZTE CORP
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