CN112365415A - Fast display conversion method for high dynamic range image - Google Patents
Fast display conversion method for high dynamic range image Download PDFInfo
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- CN112365415A CN112365415A CN202011238385.7A CN202011238385A CN112365415A CN 112365415 A CN112365415 A CN 112365415A CN 202011238385 A CN202011238385 A CN 202011238385A CN 112365415 A CN112365415 A CN 112365415A
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Abstract
The fast display and conversion method of the high dynamic range image adopts the following steps: s1, initializing a scaling factor
S2, sequentially reading pixel points x in the image with high dynamic rangei(ii) a S3, calculating the current pixel value xiAnd the last pixel value xi_1Difference d ofi(ii) a S4, comparison diAnd
the magnitude relationship between them, if
The conversion result y of the last pixel valuei‑1On the basis of which the conversion result y of the current pixel value is obtainedi＝yi‑1+diXf; if it is
The conversion result y of the last pixel valuei‑1On the basis of which the conversion result of the current pixel value is obtained
S5, based on yiA low dynamic image corresponding to the high dynamic range image is constructed. Compared with the prior art, the invention has the beneficial effects that: the conversion operation of the high dynamic image is completed in the process of reading the pixel value of the image, the display conversion speed of the high dynamic image is improved, and the image detail information is reserved.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a rapid display conversion method for a high dynamic range image.
Background
The image refers to a general term of all pictures and videos, and is the most common and basic data information in the modern information society. Means for recording image information have been developed from the beginning of film technology to the most widely used CCD/CMOS image sensor, and therefore, image acquisition basically refers to acquiring an image signal output from the CCD/CMOS image sensor.
The acquisition precision, the acquisition speed and the storage capacity of the acquisition system are key factors of image acquisition. With the rapid development of modern electronic technology, the high-speed image acquisition technology has wide application in more and more fields, such as image processing, video conferencing, public security monitoring systems, traffic monitoring, industrial control, military, medicine, aerospace and the like, and can relate to the high-speed image acquisition technology in all aspects of our lives.
The existing high dynamic range image display method has high operation complexity mostly and low execution efficiency, and is difficult to meet the performance requirement of quick display.
Disclosure of Invention
The present invention is directed to provide a method for fast displaying and converting an image with a high dynamic range, which completes the conversion operation of the image with a high dynamic range in the process of reading the pixel values of the image, converts the image with a high dynamic range into a low dynamic image that can be displayed, and can ensure the display of details while completing the conversion.
In order to achieve the above object, the present invention adopts the following aspects.
The fast display and conversion method of the high dynamic range image adopts the following steps:
s1, initializing a scaling factor
RhIn the order of magnitude of the dynamic range of a high dynamic image, RlThe dynamic range order of magnitude of the low dynamic image;
s2, sequentially reading pixel points x in the image with high dynamic rangei；
S3, calculating the current pixel value xiAnd the last pixel value xi-1Difference d ofi；
S4, comparison diAnd
the magnitude relationship between them, if
The conversion result y of the last pixel valuei-1On the basis of which the conversion result y of the current pixel value is obtainedi＝yi-1+diXf; if it is
The conversion result y of the last pixel valuei-1On the basis of which the conversion result of the current pixel value is obtained
S5, based on yiA low dynamic image corresponding to the high dynamic range image is constructed.
Compared with the prior art, the invention has the beneficial effects that:
the conversion operation of the high dynamic image is completed in the process of reading the pixel value of the image, the display conversion speed of the high dynamic image is improved, and the image detail information is reserved.
The present invention will be further described with reference to specific embodiments.
Detailed Description
The fast display and conversion method of the high dynamic range image adopts the following steps:
s1, initializing a scaling factor
RhIn the order of magnitude of the dynamic range of a high dynamic image, RlThe dynamic range order of magnitude of the low dynamic image;
s2, sequentially reading pixel points x in the image with high dynamic rangei；
S3, calculating the current pixel value xiAnd the last pixel value xi-1Difference d ofi；
S4, comparison diAnd
the magnitude relationship between them, if
The conversion result y of the last pixel valuei-1On the basis of which the conversion result y of the current pixel value is obtainedi＝yi-1+diXf; if it is
The conversion result y of the last pixel valuei-1On the basis of which the conversion result of the current pixel value is obtained
S5, based on yiA low dynamic image corresponding to the high dynamic range image is constructed.
The rapid display conversion method and the scaling factor of the high dynamic range image are adopted
Is the key point for fast display switching, RhIs a high dynamic mapOrder of magnitude of dynamic range of image, RlOn the order of the dynamic range of low dynamic images, for example: if the dynamic range of the high dynamic image is 0-65535, R ish65536, if the dynamic range of the low dynamic image is 0-255, then RlIs 256. Sequentially reading in pixel points x in image with high dynamic rangeiThen, the current pixel value x is calculatediAnd the last pixel value xi-1Difference d ofi(ii) a Comparison diAnd
the magnitude relationship between them, if
The conversion result y of the last pixel valuei-1On the basis of which the conversion result y of the current pixel value is obtainedi＝yi-1+diXf; if it is
The conversion result y of the last pixel valuei-1On the basis of which the conversion result of the current pixel value is obtained
And finally, based on yiA low dynamic image corresponding to the high dynamic range image is constructed.
Therefore, by adopting the rapid display conversion method for the high dynamic range image, the conversion operation of the high dynamic range image is completed in the process of reading the pixel value of the image, the high dynamic range image is converted into the low dynamic range image which can be displayed, and the detail display can be ensured while the conversion is completed.
It will be clear to a person skilled in the art that the scope of protection of the present invention is not limited to details of the foregoing illustrative embodiments, and that all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein by the appended claims without departing from the spirit or essential characteristics thereof.
Claims (1)
1. The fast display conversion method of the high dynamic range image is characterized by comprising the following steps:
s1, initializing a scaling factor
RhIn the order of magnitude of the dynamic range of a high dynamic image, RlThe dynamic range order of magnitude of the low dynamic image;
s2, sequentially reading pixel points x in the image with high dynamic rangei；
S3, calculating the current pixel value xiAnd the last pixel value xi-1Difference d ofi；
S4, comparison diAnd
the magnitude relationship between them, if
The conversion result y of the last pixel valuei-1On the basis of which the conversion result y of the current pixel value is obtainedi＝yi-1+diXf; if it is
The conversion result y of the last pixel valuei-1On the basis of which the conversion result of the current pixel value is obtained
S5, based on yiA low dynamic image corresponding to the high dynamic range image is constructed.
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| CN112365415B CN112365415B (en) | 2024-02-09 |
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| WO2005101309A1 (en) * | 2004-04-15 | 2005-10-27 | The University Of British Columbia | Methods and systems for converting images from low dynamic range to high dynamic range |
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| KR20110048811A (en) * | 2009-11-03 | 2011-05-12 | 중앙대학교 산학협력단 | Method and apparatus for converting dynamic ranges of input images |
| CN103067671A (en) * | 2012-12-31 | 2013-04-24 | 华为技术有限公司 | Method and device of image display |
| WO2015183693A1 (en) * | 2014-05-27 | 2015-12-03 | Rambus, Inc. | Oversampled high dynamic-range image sensor |
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| US20180033125A1 (en) * | 2016-07-27 | 2018-02-01 | Sharp Laboratories Of America, Inc. | System for conversion of low dynamic range images to high dynamic range images |
| CN108986016A (en) * | 2018-06-28 | 2018-12-11 | 北京微播视界科技有限公司 | Image beautification method, device and electronic equipment |
| WO2019090580A1 (en) * | 2017-11-09 | 2019-05-16 | SZ DJI Technology Co., Ltd. | System and method for image dynamic range adjusting |
| US20200193890A1 (en) * | 2017-05-05 | 2020-06-18 | Koninklijke Philips N.V. | Optimized decoded high dynamic range image saturation |
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2020
- 2020-11-09 CN CN202011238385.7A patent/CN112365415B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005101309A1 (en) * | 2004-04-15 | 2005-10-27 | The University Of British Columbia | Methods and systems for converting images from low dynamic range to high dynamic range |
| US20070258641A1 (en) * | 2006-05-05 | 2007-11-08 | Microsoft Corporation | High dynamic range data format conversions for digital media |
| KR20110048811A (en) * | 2009-11-03 | 2011-05-12 | 중앙대학교 산학협력단 | Method and apparatus for converting dynamic ranges of input images |
| CN103067671A (en) * | 2012-12-31 | 2013-04-24 | 华为技术有限公司 | Method and device of image display |
| WO2015183693A1 (en) * | 2014-05-27 | 2015-12-03 | Rambus, Inc. | Oversampled high dynamic-range image sensor |
| CN105933616A (en) * | 2016-05-12 | 2016-09-07 | 重庆邮电大学 | Image processing method and equipment |
| US20180033125A1 (en) * | 2016-07-27 | 2018-02-01 | Sharp Laboratories Of America, Inc. | System for conversion of low dynamic range images to high dynamic range images |
| US20200193890A1 (en) * | 2017-05-05 | 2020-06-18 | Koninklijke Philips N.V. | Optimized decoded high dynamic range image saturation |
| WO2019090580A1 (en) * | 2017-11-09 | 2019-05-16 | SZ DJI Technology Co., Ltd. | System and method for image dynamic range adjusting |
| CN108986016A (en) * | 2018-06-28 | 2018-12-11 | 北京微播视界科技有限公司 | Image beautification method, device and electronic equipment |
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