【摘要】：為了實(shí)現(xiàn)遙感圖像超分辨目的,提出數(shù)字域斜模態(tài)時(shí)間延遲積分(Digital Domain Tilting Model Time Delayed and Integration,DT-TDI)技術(shù)。對(duì)技術(shù)過(guò)程所涉及的數(shù)字域TDI技術(shù)、傾斜采樣成像理論、數(shù)字域斜模態(tài)TDI技術(shù)等分別進(jìn)行分析與研究。首先,構(gòu)建通用的數(shù)字域TDI模型。之后,利用傾斜采樣成像思想,構(gòu)建適用于不同傾斜角度下的DT-TDI模型。然后,以45°傾角對(duì)模型進(jìn)行實(shí)驗(yàn)驗(yàn)證,獲取該角度一定姿軌條件下的序列低分辨率圖像。最后,通過(guò)超分辨算法對(duì)具有亞像素位移的低分辨率圖像序列進(jìn)行超分辨重構(gòu),獲取高分辨率圖像。實(shí)驗(yàn)結(jié)果表明,DT-TDI技術(shù)可在不同傾斜模態(tài)下進(jìn)行穩(wěn)定成像,45°傾角時(shí)獲取的低分辨率圖像亞像素位移誤差約15%,基本滿足超分辨重構(gòu)需求。重構(gòu)后圖像分辨率明顯提升。
[Abstract]:In order to realize the purpose of super-resolution of remote sensing image, a digital domain oblique modal time delay integral (Digital Domain Tilting Model Time Delayed and Integration,DT-TDI technique is proposed. The digital domain TDI technology, oblique sampling imaging theory and digital domain oblique mode TDI technology involved in the technical process are analyzed and studied respectively. First of all, a general digital domain TDI model is constructed. After that, the DT-TDI model suitable for different tilt angles is constructed by using the idea of tilt sampling imaging. Then, the model is verified by 45 擄inclination angle, and the sequence low resolution images with a certain attitude and orbit are obtained. Finally, the super-resolution algorithm is used to reconstruct the low-resolution image sequence with sub-pixel displacement, and the high-resolution image is obtained. The experimental results show that the DT-TDI technique can perform stable imaging under different tilt modes, and the subpixel displacement error of the low resolution image obtained at 45 擄inclination angle is about 15%, which basically meets the requirements of super-resolution reconstruction. After reconstruction, the image resolution is improved obviously.
【作者單位】： 首都師范大學(xué)北京成像技術(shù)高精尖創(chuàng)新中心;中國(guó)科學(xué)院長(zhǎng)春光學(xué)精密機(jī)械與物理研究所;中國(guó)科學(xué)院大學(xué);
【分類號(hào)】：TP751

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