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    • 3. 发明申请
    • NON-UNIFORMITY CORRECTION OF IMAGES GENERATED BY FOCAL PLANE ARRAYS OF PHOTODETECTORS
    • 光谱仪的焦点平面阵列产生的图像的非均匀性校正
    • WO2007086063A2
    • 2007-08-02
    • PCT/IL2007/000101
    • 2007-01-25
    • RAFAEL - ARMAMENT DEVELOPMENT AUTHORITY LTD.MANGOUBI, ShmuelNAVEH, Oved
    • MANGOUBI, ShmuelNAVEH, Oved
    • G06T7/00
    • G06T5/50G06T5/002G06T5/006G06T5/007G06T2207/10048G06T2207/20224H04N5/33H04N5/3656
    • Methods and apparatus for effecting a non-uniformity correction of images of a scene obtained with an array of detector elements are disclosed. A first image of the scene having a first integration period is acquired using the array of detector elements. A second image of the scene having a different integration period is acquired, and a corrected image of the scene is generated by computing a difference of the images. In some embodiments, the first and second images are images of substantially identical scenes. According to some embodiments, the images are infrared images. Optionally, the corrected image is subjected to further correction using pixel dependent correction coefficients, such as gain coefficients. Exemplary image detection elements include but are not limited to InSb detector elements and ternary detector elements, such as InAlSb, MCT (Mercury Cadmium Telluride), and QWIP technology (Quantum Well Infrared Photodiodes). In some embodiments, the detector elements are cooled to a temperature substantially equal to an atmospheric boiling point of liquid nitrogen. Alternatively, the detector elements are cooled to a temperature below an atmospheric boiling point of liquid nitrogen, or any other operating temperature.
    • 公开了一种用于实现用检测器元件阵列获得的场景的图像的不均匀性校正的方法和装置。 使用检测器元件阵列获取具有第一积分周期的场景的第一图像。 获取具有不同积分周期的场景的第二图像,并且通过计算图像的差异来生成场景的校正图像。 在一些实施例中,第一和第二图像是基本上相同的场景的图像。 根据一些实施例,图像是红外图像。 可选地,使用诸如增益系数的像素相关校正系数对校正图像进行进一步校正。 示例性图像检测元件包括但不限于InSb检测器元件和三元检测器元件,例如InAlSb,MCT(碲化汞碲化镉)和QWIP技术(量子阱红外光电二极管)。 在一些实施例中,将检测器元件冷却至基本等于液氮的常压沸点的温度。 或者,将检测器元件冷却至低于液氮的常压沸点或任何其它工作温度的温度。