公开(公告)号：US4991007A

公开(公告)日：1991-02-05

申请号：US347675

申请日：1989-05-05

Applicant: Ferrand D. E. Corley

Inventor： Ferrand D. E. Corley

IPC: H04N17/00

CPC classification number: H04N17/002

Abstract: A system and method for evaluating a visual image characteristic, such as the brightness, color, tonal scale, geometric linearity, sharpness and/or position, of an electronic image signal, such as obtained, for example, from a television camera. The image signals, including an image of a test target, pass to an image combiner. A reference image signal from a reference signal generator also passes to the image combiner and a combined signal then passes to a monitor on which the image of the test target and the reference image are displayed in juxtaposition for comparison. An adjustable image signal modifier adapted to modify the desired signal characteristic can be provided between the camera and the combiner. An operator then adjusts the image signal modifier until the selected characteristic of the two images as displayed have a predetermined relationship. The extent of such modification can also provide a quantification of the deviation of the image of the test target from a predetermined relationship with the reference image for the selected characteristic. Further image signals appropriately modified as obtained from the image signal modifier can be transmitted or recorded for later dissemination. Quantification of the deviation can also be obtained by recording the required modification of the reference image signal.

Abstract translation: 一种用于评估例如从电视摄像机获得的电子图像信号的视觉图像特性（例如亮度，颜色，色调尺度，几何线性，锐度和/或位置）的系统和方法。 包括测试对象的图像的图像信号传递到图像组合器。 来自参考信号发生器的参考图像信号也传递给图像组合器，并且组合信号然后传递到监视器，在该监视器上并置显示测试对象和参考图像的图像以进行比较。 可以在相机和组合器之间提供适于修改所需信号特性的可调节图像信号修改器。 然后，操作者调整图像信号修改器，直到所显示的两个图像的选定特征具有预定的关系。 这种修改的范围还可以提供测试对象的图像与所选特征的参考图像的预定关系的偏差的量化。 可以发送或记录从图像信号修改器获得的适当修改的其他图像信号以供稍后传播。 也可以通过记录参考图像信号的所需修改来获得偏差的量化。