公开(公告)号：US20040119005A1

公开(公告)日：2004-06-24

申请号：US10321608

申请日：2002-12-18

Applicant: LOCKHEED MARTIN CORPORATION

Inventor： Robert M. Krohn ,  James S. Howard ,  Glenn L. Kehley ,  Steven J. Pratt

IPC: H01J005/02

CPC classification number: H04N1/00013 ,  H04N1/00002 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00058 ,  H04N1/00087 ,  H04N1/193 ,  H04N17/002

Abstract: A new and improved line scan camera achieves the proper framing of the image field of view by using a first test card to calibrate the true bottom and leading edge portions of the test card which simulate the true bottom and leading portions of an article being scanned or photographed. Still further, the architecture of the electronic chip incorporated within the charge coupled device (CCD) of the camera effectively divides the linear array of pixels into a plurality of channels, and amplifier gain and black offset adjustments are made with respect to exposure levels, characteristic of the pixels disposed at the channel boundaries, under different degrees of input whiteness signals applied to a test card of a predetermined color shade, so as to achieve channel-to-channel seam matching. Subsequently, correction factors are effectively superimposed upon substantially all of the exposure levels characteristic of substantially all of the pixels comprising the line scan of the line scan camera such that true uniform exposure levels are in fact achieved.

Abstract translation: 新的和改进的线扫描相机通过使用第一测试卡来校准测试卡的真实底部和前缘部分来模拟正在扫描的物品的真实底部和前导部分，从而实现图像视场的适当构图， 拍照 另外，结合在照相机的电荷耦合器件（CCD）中的电子芯片的结构有效地将线性阵列阵列划分成多个通道，并且相对于曝光水平进行放大器增益和黑色偏移调整 在施加到预定色调的测试卡的不同程度的输入白度信号下，设置在通道边界处的像素，以实现通道到通道缝合匹配。 随后，校正因子有效地叠加在基本上所有的包括行扫描照相机的行扫描的像素的所有像素的曝光水平之上，实际上实现了真正的均匀曝光水平。