High-speed subpixel image sensing technique and its applications

高速亚像素图像传感技术及其应用

基本信息

批准号：
15300050
负责人：
AOKI Takafumi
金额：
$ 6.59万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15300050/
关键词：
Image Registration Image Matching Phase-Only Correlation 3D Measurement Super-Resolution Biometrics Digital Signal Processing VLSI Design 位相限定相関数

项目摘要

1. A high-accuracy image matching technique using Phase-Only Correlation (POC) function was developed. The newly developed technique can improve matching performance by fitting the closed-form analytical model of the correlation peak to actual two-dimensional numerical data. This technique can also be extended to a spectrum weighting POC technique, where we modify cross-phase spectrum with some weighting functions to enhance registration accuracy. We provided systematic experimental analysis of the matching performance of the proposed technique by evaluating the errors in estimating the translational displacements, the rotation angle and the scale factor.2. Some applications of the POC-based image matching/registration technique to (i) high-accuracy scale estimation for electron microscopes, (ii) high-accuracy measurement for metal component inspection, (iii) super-resolution processing for video sequences, (iv) high-quality background sprite generation, (v) video object segmentation, and (vi) fingerprint/3D face recognition were studied.3. System implementation techniques were investigated for developing the above applications. We studied the implementation of the application (i) on a general-purpose processor since it handles only 2D still images. On the other hand, we studied the implementations of the applications (ii)-(vi) on a digital signal processor and specific hardware.

1. 开发了一种使用纯相位相关（POC）函数的高精度图像匹配技术。新开发的技术可以通过将相关峰的封闭式分析模型拟合到实际的二维数值数据来提高匹配性能。该技术还可以扩展到频谱加权 POC 技术，我们使用一些加权函数修改跨相位频谱以提高配准精度。通过评估估计平移位移、旋转角度和比例因子的误差，对所提出技术的匹配性能进行了系统的实验分析。2．基于 POC 的图像匹配/配准技术的一些应用：(i) 电子显微镜的高精度尺度估计，(ii) 金属部件检测的高精度测量，(iii) 视频序列的超分辨率处理，(iv) ）研究了高质量背景精灵生成、（v）视频对象分割和（vi）指纹/3D人脸识别。 3．研究了系统实现技术以开发上述应用程序。我们研究了应用程序 (i) 在通用处理器上的实现，因为它仅处理 2D 静态图像。另一方面，我们研究了应用程序（ii）-（vi）在数字信号处理器和特定硬件上的实现。