| 摘要 |
The present invention introduces an image conversion apparatus capable of coinciding the luminance variation ratio in the display unit of the television receiver with a variation ratio according to the linear operation though the linear operation is applied to the video signal outputted from the computer. The first gamma correction circuit receives the video signal outputted from the computer. This video signal intends to be inputted to a CRT display unit, therefore, the video signal is provided with an inverse gamma property corresponding to the luminance property of the CRT display unit. The first gamma correction circuit 100 applies the gamma correction operation to the video signal so as to remove the inverse gamma property in the video signal. The linear arithmetic circuit applies the linear operation to the output from the first gamma correction circuit. The second gamma correction circuit applies the gamma operation to the output from the linear arithmetic circuit so as to provide an inverse gamma property denying the gamma property of a cathode-ray tube of the television receiver.
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