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Image thumbnail generation method, device and terminal

A thumbnail and image technology, applied in the field of communications, can solve the problems of poor image content information accuracy, failure to consider image content information, and thumbnail images that cannot fully express content information, etc., and achieve the effect of improving accuracy.

Active Publication Date: 2017-06-16
XIAOMI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above method only considers the spatial position information of the image, and does not consider the content information of the image at all, which will cause the generated thumbnail to sometimes not fully express the content information of the original image
For example, when the position of a person in an image is relatively biased, if only the middle part of the image is captured, only a part of the person may be included in the generated thumbnail, resulting in poor accuracy in expressing the content information of the original image

Method used

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  • Image thumbnail generation method, device and terminal
  • Image thumbnail generation method, device and terminal
  • Image thumbnail generation method, device and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] see figure 1 , this embodiment provides a method for generating an image thumbnail, the method includes the following steps.

[0074] In step 101, the image is filtered to obtain the edge intensity value of each pixel in the image.

[0075] In this embodiment, the image is filtered to obtain the edge strength value of each pixel in the image, which may include: using a Laplacian edge filter operator, a Sobel edge filter operator, a Robert edge operator, a Prewitt edge operator Or the LOG edge operator filters the image to obtain the edge intensity value of each pixel in the image.

[0076] In this embodiment, the pixel points with relatively close edge intensity values ​​can be considered to have little color difference; the pixel points with relatively large edge intensity values ​​can be considered to have relatively large color difference, therefore, it can be considered that the edge intensity values ​​are between To a certain extent, it reflects the content infor...

Embodiment 2

[0102] see figure 2 , this embodiment provides a method for generating an image thumbnail, the method includes the following steps.

[0103] In step 201, the image is filtered to obtain the edge intensity value of each pixel in the image.

[0104] Wherein, the image filtering can be implemented by using various filtering operators, see the description in Embodiment 1 for details, and will not be repeated here.

[0105] In step 202, use a preset rectangular frame to slide and search on the image, and for the rectangular frame at each position of the sliding search, sum the edge intensity values ​​of all pixels in it to obtain the information content distribution of the rectangular frame value.

[0106] Wherein, the size of the rectangular frame can be set as required, as long as it is smaller than the size of the image. The sliding search performed by the rectangular frame on the image may be a sliding search in any direction, which is not specifically limited in this embodim...

Embodiment 3

[0114] see Figure 3a , this embodiment provides a method for generating an image thumbnail, the method includes the following steps.

[0115] In step 301, the image is filtered to obtain the edge intensity value of each pixel in the image.

[0116] Wherein, the image filtering can be implemented by using various filtering operators, see the description in Embodiment 1 for details, and will not be repeated here.

[0117] In addition, for the convenience of calculation, the edge intensity value can also be normalized to obtain a value in the range of 0 to 255, and then the calculation is performed.

[0118] In step 302, the spatial position attention value of each pixel in the image is calculated by using the attention model established in advance according to the center point of the image and the coordinates of each pixel.

[0119] Wherein, this step may include the following steps:

[0120] Use the following attention model to calculate the spatial position attention value...

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Abstract

The disclosure provides a method, device and terminal for generating image thumbnails, which belong to the communication field. The method includes: filtering the image to obtain the edge strength value of each pixel in the image; sliding and searching on the image with a preset rectangular frame, and for the rectangular frame at each position of the sliding search, according to its Calculate the information distribution value of the rectangular frame based on the edge strength value of the inner pixel points; select the rectangular frame with the largest information distribution value, and intercept the image content corresponding to the selected rectangular frame to obtain a thumbnail of the image. The device includes: a filtering module, a searching module and an intercepting module. The disclosure realizes the generation of thumbnails based on image content information, improves the accuracy of thumbnails in expressing original image content information, and is more in line with people's cognitive habits.

Description

technical field [0001] The present disclosure relates to the communication field, and in particular to a method, device and terminal for generating image thumbnails. Background technique [0002] In recent years, with the realization of technologies such as Selfie and continuous shooting of mobile devices, the capacity of personal photo albums in mobile devices is also increasing rapidly. Usually, the personal photo album will generate thumbnails for the stored images, and put the thumbnails in preview mode for users to preview and consult. At present, a relatively common method for generating image thumbnails is to directly intercept the middle part of the image, and scale the intercepted middle part accordingly to obtain the thumbnail of the image. The advantage of this method is that it is very efficient. [0003] However, the above method only considers the spatial position information of the image, and does not consider the content information of the image at all, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30G06T5/00
CPCG06T7/13G06F16/583H04N1/3875G06T3/04G06T7/00H04N21/854H04N21/8549
Inventor 王琳张祺深张波
Owner XIAOMI INC
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