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Method and device for image conversion

An image conversion and image technology, applied in the field of image processing, can solve problems such as low definition and poor image contrast, and achieve the effect of flexible application, reduced calculation amount, and improved user experience

Active Publication Date: 2019-07-12
SHANGHAI OXI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the image converted by the above scheme has poor contrast and low definition

Method used

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  • Method and device for image conversion

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Embodiment Construction

[0049] Non-8-bit grayscale images, such as 16-bit grayscale images, can contain more information, but image processing tools on the market generally can only process 8-bit grayscale images, so for non-8-bit grayscale images that can be obtained As far as the imaging system of the grayscale image is concerned, it is necessary to convert the obtained image into an 8-bit grayscale image before using image processing tools for processing. At present, non-8-bit grayscale images can be converted into 8-bit images by only intercepting high-order 8-bit pixels or converting them in equal proportions, that is, the information of the original grayscale images is completely ignored. This will make the converted image poor in contrast and low in definition.

[0050] In order to solve the above problems, the embodiment of the present invention provides an image conversion method, that is: according to the window width value and window level value of the image, firstly obtain the maximum thr...

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Abstract

The invention provides an image conversion method and an apparatus. An image is an 8-bit image. The method comprises the steps of calculating the maximum pixel value and the minimum pixel value of a to-be-converted image; obtaining the window width value of the to-be-converted image according to the maximum pixel value of the to-be-converted image, the minimum pixel value of the to-be-converted image and a preset window width value; calculating the window level value of the to-be-converted image; according to the window width value and the window level value of the to-be-converted image, acquiring the maximum threshold., the minimum threshold and the conversion ratio coefficient of the to-be-converted image; according to the maximum threshold., the minimum threshold and the conversion ratio coefficient of the to-be-converted image, converting the to-be-converted image into an 8-bit image. According to the technical scheme of the invention, the contrast and the sharpness of the image after the conversion process can be improved. Meanwhile, the image display quality is improved.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image conversion method and device. Background technique [0002] As the visual basis of human perception of the world, images are an important means for human beings to obtain information, express information and transmit information. Digital image processing is the processing of images with computers. A digital image refers to a large two-dimensional array captured by industrial cameras, video cameras, scanners and other equipment. The elements of the array are called pixels, and their values ​​are called grayscale values. Image processing technology generally includes image compression, enhancement and restoration, matching, description and recognition. [0003] The image processing tools on the market generally can only process 8-bit grayscale images, so for the non-8-bit grayscale images obtained by the imaging system, they need to be converted into 8-bit grayscale image...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00
CPCG06T3/0012
Inventor 李瑞鑫朱虹凌严
Owner SHANGHAI OXI TECH