公开(公告)号：US06529243B1

公开(公告)日：2003-03-04

申请号：US09048926

申请日：1998-03-26

申请人： Werner Ritter von Stein ,  Wolfgang Zahn

发明人： Werner Ritter von Stein ,  Wolfgang Zahn

IPC分类号： H04N5225

CPC分类号： H04N5/235 ,  H04N5/142 ,  H04N5/20 ,  H04N5/243 ,  H04N9/045 ,  H04N2209/049

摘要： A method for electronic reduction of the contrast of video images as early as during recording provides electronic brightening of the shaded zones of a video image in a camera as early as during recording while maintaining the detail contrast even in the brightened regions. A blurred diffuse image of the motif is produced on the image sensor in the camera by the objective and the electronically alterable diffusion element, and is stored in a frame store. The black and white contrast of the mask is determined in the evaluation circuit, and a control variable is generated pixel-by-pixel from this. The focused video image which is subsequently produced on the image sensor when the diffusion element is switch to be crystal-clear is read and is amplified or attenuated pixel-by-pixel such that the shadowed parts are brightened and/or the bright zones are attenuated.

摘要翻译： 一种用于在记录期间电子降低视频图像的对比度的方法提供了在记录期间在摄像机中视频图像的阴影区域的电子增亮，同时即使在增亮区域中也保持细节对比度。 通过物镜和电子可变扩散元件在摄像机的图像传感器上产生模糊的模糊漫射图像，并存储在帧存储器中。 在评估电路中确定掩模的黑白对比度，并从其中逐像素地生成控制变量。 读取扩散元件切换为清晰的随后在图像传感器上产生的聚焦视频图像，并逐个像素地放大或衰减，使得阴影部分变亮和/或亮区域被衰减 。

公开(公告)号：US5863711A

公开(公告)日：1999-01-26

申请号：US906384

申请日：1997-08-05

申请人： Wolfgang Zahn ,  Werner Ritter Von Stein

发明人： Wolfgang Zahn ,  Werner Ritter Von Stein

IPC分类号： G03C5/08 ,  G03C7/407

CPC分类号： G03C5/08

摘要： In a process for the production of colour photographic prints, in which transparent colour photographic originals having a wide range of brightness are reproduced on a colour photographic paper and the colour photographic paper exposed in this manner is subjected to a process comprising at least the stages colour development and silver removal, satisfactory definition both in the highlights and in the shadows is achieved by locally modifying the sensitivity of the colour negative paper before processing as a function of the original and with the modification not being sharply defined.

摘要翻译： 在生产彩色照相印刷品的方法中，其中在彩色相纸上再现具有宽范围亮度的透明彩色照相原稿，以这种方式曝光的彩色相纸经受至少包括阶段颜色 发展和银色去除，在亮点和阴影中的令人满意的定义是通过在处理之前通过局部改变彩色负片作为原件的功能的灵敏度而实现的，并且修改不被明确定义。

公开(公告)号：US06720992B1

公开(公告)日：2004-04-13

申请号：US09430459

申请日：1999-10-29

申请人： Wolfgang Zahn ,  Werner Ritter von Stein

发明人： Wolfgang Zahn ,  Werner Ritter von Stein

IPC分类号： H04N904

CPC分类号： H04N1/6027 ,  G06T5/007

摘要： The optimum reproduction of high-contrast motifs in digital imaging technology is limited owing to the limited dynamic range of present-day image sensors. The reproduction of high-contrast motifs is intended to be improved using active pixel image sensors. The sensitivity of the sensor pixels is adapted, controlled in an analogous manner to the blurred brightness distribution in the motif, to ensure that the dark and bright image regions of the motif are also reproduced, well illuminated, without any loss of detailed contrast. This results in a particularly natural and balanced image impression. This method may be used in numerous fields for digital image processing.

摘要翻译： 由于目前图像传感器的动态范围有限，数字成像技术中高对比度图案的最佳再现受到限制。 使用有源像素图像传感器旨在改进高对比度图案的再现。 传感器像素的灵敏度以与图案中的模糊亮度分布类似的方式进行调整，以确保图案的暗和亮的图像区域也被再现，良好照明，而没有任何损失的详细对比度。 这导致了一种特别自然和平衡的图像印象。 该方法可用于数字图像处理的多个领域。