发明授权
US06529243B1 Method for electronic reduction of the contrast of video images as early as during recording
失效
在记录过程中尽早电子缩小视频图像的对比度的方法
- 专利标题: Method for electronic reduction of the contrast of video images as early as during recording
- 专利标题(中): 在记录过程中尽早电子缩小视频图像的对比度的方法
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申请号: US09048926申请日: 1998-03-26
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公开(公告)号: US06529243B1公开(公告)日: 2003-03-04
- 发明人: Werner Ritter von Stein , Wolfgang Zahn
- 申请人: Werner Ritter von Stein , Wolfgang Zahn
- 主分类号: H04N5225
- IPC分类号: H04N5225
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.
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