Method of and apparatus for producing hard copy of color picture adaptive to variations in characteristics of fluorescent screen of recorder CRT

DETAILED DESCRIPTION It is therefore an object of the present invention to provide a method and apparatus for producing a hard copy of a color picture which is capable of reproducing a color picture with high quality despite variations in the radiation characteristics of fluorescent substances which are provided on a CRT.
In accordance with one aspect of the present invention, there is provided an apparatus for producing a hard copy of a color picture having a CRT for displaying a picture component on a screen thereof upon reception of a video signal which is associated with a separated color component, and a recording section which includes a plurality of separated-color filters to expose a recording medium to the picture component being displayed on the screen through any of the filters.
The recording section, or recorder, exposes the recording medium to picture components of individual separated colors by additive color photography to record a color picture.
A photodetector is provided for measuring brightness of the screen through any of the filters while a controller controls the CRT and the photodetector.
The controller, before recording the picture components of the individual separated-color components in the recording medium, adjusts at least one of luminance and contrast of the CRT and an exposure time of the recording medium, based on the brightness measured.
In accordance with another aspect of the present invention, there is provided a method of producing a hard copy of a color picture comprising the steps of producing a picture on a screen of a CRT upon reception of a video signal which is associated with a separated-color component, and exposing a recording medium to the picture component being dispalyed on the screen through any of a plurality of separated-color filters, whereby the recording medium is exposed to picture components of individual separated-color components by additive color photography to record a color picture on the recording medium.
Before recording the picture components of the individual separated-color components on the recording medium, any one of the plurality of filters is selected