Article(id=1207343644776960061, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1207343627223802520, articleNumber=null, orderNo=null, doi=10.12404/j.issn.1671-1815.2404031, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1716998400000, receivedDateStr=2024-05-30, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1765782756274, onlineDateStr=2025-12-15, pubDate=1750176000000, pubDateStr=2025-06-18, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1765782756274, onlineIssueDateStr=2025-12-15, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1765782756274, creator=13701087609, updateTime=1765782756274, updator=13701087609, issue=Issue{id=1207343627223802520, tenantId=1146029695717560320, journalId=1146123166801305609, year='2025', volume='25', issue='17', pageStart='7023', pageEnd='7453', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1765782752085, creator=13701087609, updateTime=1765783816840, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1207348093192872694, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1207343627223802520, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1207348093192872695, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1207343627223802520, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=7260, endPage=7267, ext={EN=ArticleExt(id=1207343646148497550, articleId=1207343644776960061, tenantId=1146029695717560320, journalId=1146123166801305609, language=EN, title=Deep Neural Network for Fisheye Camera Calibration and Distortion Correction, columnId=1207343631124505261, journalTitle=Science Technology and Engineering, columnName=Papers-Automation and Computational Technology, runingTitle=null, highlight=null, articleAbstract=
To address the cumbersome calibration process of fisheye cameras and its inapplicability to everyday scene images, a novel convolutional neural network(CNN)-based method was proposed that simultaneously calibrates the intrinsic parameters of fisheye lenses and corrects image distortion. The accuracy of fisheye camera calibration and image distortion correction was improved by predicting the displacement of pixel points under different distortion parameters. A coordinate attention module was introduced in the encoding part to enhance the model's accuracy and generalization ability to increase attention to image position information. Additionally, a cross-scale fusion module was designed in the skip connections to enhance image detail features. To address the issues of dataset scarcity and incomplete distortion parameter distribution, a new large-scale dataset labeled with corresponding distortion parameters and images after distortion correction was created. Experimental results show that compared to other fisheye camera calibration methods, this method achieves a reprojection error of 0.312 pixel, indicating the highest calibration accuracy. Additionally, compared to other image distortion correction methods, a peak signal to noise ratio(PSNR) of 38.055 dB and an structural similarity(SSIM) of 0.874 are achieved, indicating the best quality of image distortion correction.
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针对鱼眼相机的传统标定过程烦琐并且不适用于日常场景图像的问题,提出了一种新的基于卷积神经网络的方法,可同时标定鱼眼镜头的内参并进行图像畸变校正。该方法通过预测不同畸变参数下像素点的位移量,从而提高鱼眼相机标定和图像畸变校正的精度;为了进一步提高模型精度和泛化性,在编码部分引入坐标注意力模块,增强对图像位置信息的关注度;最后为了增强图像的细节特征,在跨越连接部分设计了跨尺度融合模块。针对数据集稀缺的问题,还生成了一个新的大规模数据集,标有相应的畸变参数和畸变校正后的图像。实验结果表明:与其他鱼眼相机标定方法相比,重投影误差为0.312 pixel,标定的精度较高;与图像畸变处理方法相比,峰值信噪比(peak signal to noise ratio,PSNR)为38.055 dB,结构相似度(structural similarity,SSIM)为0.874,图像畸变校正的质量较好。
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17: 297-310., articleTitle=A practical toolbox for calibrating omnidirectional cameras, refAbstract=null)], funds=[Fund(id=1207400968816272098, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, awardId=51765007, language=CN, fundingSource=国家自然科学基金(51765007), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1207400961098752427, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, xref=1, ext=[AuthorCompanyExt(id=1207400961107141036, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, companyId=1207400961098752427, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China), AuthorCompanyExt(id=1207400961157472688, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, companyId=1207400961098752427, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 广西科技大学机械与汽车工程学院, 柳州 545006)]), AuthorCompany(id=1207400961295884724, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, xref=2, ext=[AuthorCompanyExt(id=1207400961321050549, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, companyId=1207400961295884724, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China), AuthorCompanyExt(id=1207400961325244854, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, companyId=1207400961295884724, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 华南理工大学机械与汽车工程学院, 广州 510640)])], figs=[ArticleFig(id=1207400964596802107, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.1, caption=
Unified spherical model, figureFileSmall=2JDHbr3d+fYhMfhdDDS5lA==, figureFileBig=EQX/wJn0/EpXpZ1gjMvnQA==, tableContent=null), ArticleFig(id=1207400964701659714, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图1, caption=
统一球体模型 X为三维空间坐标系中的一个空间点;OC为相机坐标系的原点;OP为等效投影中心;射线XOC与单位球相交于点XS;$\xi $为OC与OP之间的距离,也就是该模型的畸变系数;mU为点X投影到归一化平面$\mathrm{\Pi }{m}_{\mathrm{U}}$上的坐标;PX为图像平面的像素坐标;K为相机的内参数矩阵;fd为等效焦距;α为投影点到像素中心的距离与焦距fd的比值
, figureFileSmall=2JDHbr3d+fYhMfhdDDS5lA==, figureFileBig=EQX/wJn0/EpXpZ1gjMvnQA==, tableContent=null), ArticleFig(id=1207400964819100236, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.2, caption=
Some dataset images, figureFileSmall=Sak6jiYop8PEN0+iYBKn+A==, figureFileBig=MAru9TXg2dHYRr6A9pEFZA==, tableContent=null), ArticleFig(id=1207400964907180622, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图2, caption=
部分数据集图片, figureFileSmall=Sak6jiYop8PEN0+iYBKn+A==, figureFileBig=MAru9TXg2dHYRr6A9pEFZA==, tableContent=null), ArticleFig(id=1207400965003649620, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.3, caption=
Network architecture, figureFileSmall=XJnXhyVn6c/oM4vDge8jBg==, figureFileBig=wd7vElTTPnLhjXhGeYKjMg==, tableContent=null), ArticleFig(id=1207400965091730009, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图3, caption=
网络结构, figureFileSmall=XJnXhyVn6c/oM4vDge8jBg==, figureFileBig=wd7vElTTPnLhjXhGeYKjMg==, tableContent=null), ArticleFig(id=1207400965200781916, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.4, caption=
Coordinate attention, figureFileSmall=iNPhPBOr/TfIQ6/Cx+EcYg==, figureFileBig=JUTK2a4+2kZCTDXuUwYflw==, tableContent=null), ArticleFig(id=1207400965305639523, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图4, caption=
坐标注意力模块 XAP为X方向上最大池化;YAP为Y方向上的最大池化;Cat为特征图拼接;Conv为卷积;BN为批量归一化;ReLU为ReLU激活函数;Sigmoid为Sigmoid激活函数
, figureFileSmall=iNPhPBOr/TfIQ6/Cx+EcYg==, figureFileBig=JUTK2a4+2kZCTDXuUwYflw==, tableContent=null), ArticleFig(id=1207400965414691437, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.5, caption=
Cross-Scale fusion module, figureFileSmall=smjvGD48ZLGbWZvqmr7bBw==, figureFileBig=T2nrzNlerJ7lZYCH7xaM+w==, tableContent=null), ArticleFig(id=1207400965506966128, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图5, caption=
跨尺度融合模块, figureFileSmall=smjvGD48ZLGbWZvqmr7bBw==, figureFileBig=T2nrzNlerJ7lZYCH7xaM+w==, tableContent=null), ArticleFig(id=1207400965611823734, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.6, caption=
Atrous spatial pyramid pooling, figureFileSmall=Bhw+jJSVban4yVBAzcMDCw==, figureFileBig=sJq/qMtqq9LjzwtNroqLGA==, tableContent=null), ArticleFig(id=1207400965716681339, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图6, caption=
空洞空间金字塔池化 Conv为卷积,其中1×1为卷积的尺寸,rate为膨胀因子;Concat为通道数拼接;Upsample为上采样
, figureFileSmall=Bhw+jJSVban4yVBAzcMDCw==, figureFileBig=sJq/qMtqq9LjzwtNroqLGA==, tableContent=null), ArticleFig(id=1207400966937223810, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.7, caption=
Sample images from the test set of different methods, figureFileSmall=HpYxni6LdJuThfv0V8KgyQ==, figureFileBig=o9T2d4YnVgD2IzSIQDNB5w==, tableContent=null), ArticleFig(id=1207400967029498503, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图7, caption=
不同方法的测试集样例图, figureFileSmall=HpYxni6LdJuThfv0V8KgyQ==, figureFileBig=o9T2d4YnVgD2IzSIQDNB5w==, tableContent=null), ArticleFig(id=1207400967142744717, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.8, caption=
Comparison of local detail processing, figureFileSmall=f4SlJU0v+x3MOSqBFtxFpA==, figureFileBig=Z2mEn0TD0cchNcaeA3atTA==, tableContent=null), ArticleFig(id=1207400967247602323, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图8, caption=
局部细节处理对比图, figureFileSmall=f4SlJU0v+x3MOSqBFtxFpA==, figureFileBig=Z2mEn0TD0cchNcaeA3atTA==, tableContent=null), ArticleFig(id=1207400967360848538, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.9, caption=
Checkerboard image, figureFileSmall=i+EWRHTJxQtbTCFe9VPfoQ==, figureFileBig=c/G2Qu/eobUYAw/VGph8bA==, tableContent=null), ArticleFig(id=1207400967461511842, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图9, caption=
棋盘格图像, figureFileSmall=i+EWRHTJxQtbTCFe9VPfoQ==, figureFileBig=c/G2Qu/eobUYAw/VGph8bA==, tableContent=null), ArticleFig(id=1207400967541203621, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Fig.10, caption=
Sample images of real fisheye pictures, figureFileSmall=9WthLbK3fuSvvFZCEswr7g==, figureFileBig=XVDGqpQVu5tR8b5G0D7MCQ==, tableContent=null), ArticleFig(id=1207400967683809965, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=图10, caption=
真实鱼眼图像样例图, figureFileSmall=9WthLbK3fuSvvFZCEswr7g==, figureFileBig=XVDGqpQVu5tR8b5G0D7MCQ==, tableContent=null), ArticleFig(id=1207400967771890355, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Table 1, caption=
Evaluation results of different methods
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 | PSNR/dB | SSIM |
| Bogdon等[10] | 36.501 | 0.641 |
| Li等[12] | 36.764 | 0.806 |
| Yang等[15] | 36.580 | 0.839 |
| 本文方法 | 38.055 | 0.874 |
), ArticleFig(id=1207400967880942265, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=表1, caption=
不同方法的评价结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 | PSNR/dB | SSIM |
| Bogdon等[10] | 36.501 | 0.641 |
| Li等[12] | 36.764 | 0.806 |
| Yang等[15] | 36.580 | 0.839 |
| 本文方法 | 38.055 | 0.874 |
), ArticleFig(id=1207400968010965694, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Table 2, caption=
Calibration results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | fd/mm | 畸变系数 |
| KB | 134.70 | 0.147,0.014 8,0.013 7,1.44×10-5 |
| Mei等[6] | 222.50 | 0.655 |
| Bogdon等[10] | 184.16 | 1.175 |
| Scaramuzza等[8] | 69.74 | 0,0.002 1,1.08×10-5,0 |
| 本文方法 | 106.66 | 0.595 |
), ArticleFig(id=1207400968115823301, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=表2, caption=
标定结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | fd/mm | 畸变系数 |
| KB | 134.70 | 0.147,0.014 8,0.013 7,1.44×10-5 |
| Mei等[6] | 222.50 | 0.655 |
| Bogdon等[10] | 184.16 | 1.175 |
| Scaramuzza等[8] | 69.74 | 0,0.002 1,1.08×10-5,0 |
| 本文方法 | 106.66 | 0.595 |
), ArticleFig(id=1207400968224875212, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Table 3, caption=
Reprojection errors of different methods
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | KB | Mei等[6] | Bogdon等[10] | Scaamuzza等[8] | 本文 方法 |
| RE/pixel | 0.371 | 0.369 | 16.01 | 0.693 | 0.312 |
), ArticleFig(id=1207400968350704335, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=表3, caption=
不同方法的重投影误差
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | KB | Mei等[6] | Bogdon等[10] | Scaamuzza等[8] | 本文 方法 |
| RE/pixel | 0.371 | 0.369 | 16.01 | 0.693 | 0.312 |
), ArticleFig(id=1207400968476533460, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=EN, label=Table 4, caption=
Ablation experiments Results
, figureFileSmall=null, figureFileBig=null, tableContent=
| CA | CSFM | ASPP | ${L}_{\mathrm{S}\mathrm{S}\mathrm{I}\mathrm{M}}$ | RE/pixel | PSNR/dB | SSIM |
| × | √ | √ | √ | 0.478 | 35.847 | 0.798 |
| √ | × | √ | √ | 0.425 | 36.735 | 0.818 |
| √ | √ | × | √ | 0.346 | 37.892 | 0.841 |
| √ | √ | √ | × | 0.681 | 34.724 | 0.746 |
| √ | √ | √ | √ | 0.312 | 38.055 | 0.874 |
), ArticleFig(id=1207400968585585367, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1207343644776960061, language=CN, label=表4, caption=
消融实验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| CA | CSFM | ASPP | ${L}_{\mathrm{S}\mathrm{S}\mathrm{I}\mathrm{M}}$ | RE/pixel | PSNR/dB | SSIM |
| × | √ | √ | √ | 0.478 | 35.847 | 0.798 |
| √ | × | √ | √ | 0.425 | 36.735 | 0.818 |
| √ | √ | × | √ | 0.346 | 37.892 | 0.841 |
| √ | √ | √ | × | 0.681 | 34.724 | 0.746 |
| √ | √ | √ | √ | 0.312 | 38.055 | 0.874 |
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