Video conversion device, photography system of video system employing same, video conversion method, and recording medium of video conversion program

Patent metadata

Field	Value
Publication number	US-9294750-B2
Application number	US-201314052185-A
Country	US
Kind code	B2
Filing date	Oct 11, 2013
Priority date	Apr 11, 2011
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A video conversion unit comprises: a unit which acquires a camera video data signal; a first color conversion unit which converts the camera video data signal to a photography scene reference color space and derives first video data; a lock modification section which carries out a lock modification on the first video data; a second color conversion unit which converts the post-color conversion video data to a video output reference color space and derives second video data; and a third color space conversion unit which converts the second video data to a color space of a verification display device and derives third video data in order to pre-verify a device color which is obtained when converting to a color space of a final video output device with a different display device.

First claim

What is claimed is:

1. A video conversion device which is used in a photography system for capturing a video with a camera in a motion picture system in which a projection image is prepared from a camera video data signal captured with the camera, the video conversion device comprising:
a camera video signal acquiring unit acquiring the camera video data signal;
a first color conversion unit converting the camera video data signal into a scene-referred color space captured with the camera to acquire video data of a first image in the scene-referred color space;
a color adjustment unit performing color adjustment on the video data of the first image to obtain the video data of the first image as color-adjusted;
a second color conversion unit converting the video data of the first image as color-adjusted into a standard color space for video output to acquire video data of a second image in the standard color space for output;
a third color-space conversion unit converting the video data of the second image into a color space of a display device for checking to acquire video data of a third image in the color space of the display device for checking so as to check colors obtained in a final output device when the video data of the second image is converted into a color space of the final output device, from which a video is finally output, with a different display device in advance; and
a processor connecting the first color conversion unit, the second color conversion unit, and the third color-space conversion unit with the color adjustment unit to perform image processing in real time,
wherein an editing information file having details of editing and processing including the color adjustment by the color adjustment unit is transmitted to a video production system along with a time code of the video data of the third image, the video production system being a system of post-production in the motion picture system,
the video data of the third image is low resolution video data, and
the standard color space for output is a color space not depending on an output device.

2. The video conversion device according to claim 1 ,
wherein the final output device is a projector screening the projection image in the motion picture system in which the projection image is prepared from plural types of the camera video data signals captured with a plurality of the cameras,
wherein the video conversion device is connected to the plurality of the cameras or connected to the plurality of the cameras in a one-to-one correspondence manner and is connected to a plurality of the display devices for checking or connected to the plurality of the display devices for checking in a one-to-one correspondence manner, and
wherein the display devices for checking are used to check colors in the final output device on a shooting side of the motion picture system.

3. The video conversion device according to claim 1 , wherein the standard color space for output is an output color space in which an ideal output device having a dynamic range of 10000:1 or more is assumed, an output color space in which a standard output device is assumed, or an output color space in which a preview of a projection film to be screened with a projector in a motion picture system is assumed.

4. The video conversion device according to claim 1 , wherein the camera is a digital video camera or a digital camera with which a video of a subject is shot to acquire the camera video data signal.

5. The video conversion device according to claim 1 ,
wherein a controller includes a display unit, a controller color conversion unit, a video analysis unit, a control unit, and an input unit,
wherein the controller color conversion unit performs color conversion for reproducing, on the display unit, the video data of the second image in the standard color space for output acquired by the second color conversion unit as an edited and processed video having the colors in the final output device,
wherein the video analysis unit analyzes the edited and processed video having the colors in the final output device that has been color-adjusted by the color adjustment unit and reproduced on the display unit,
wherein the input unit is used to input a color adjustment parameter for the color adjustment by the color adjustment unit and to change display on the display unit,
wherein the control unit controls the color adjustment in the color adjustment unit depending on the color adjustment parameter input through the input unit, and
wherein the display unit is provided with a display screen on which the edited and processed video having the colors in the final output device that is to be reproduced on the display unit and/or a result of video analysis by the video analysis unit is displayed, and an input screen to which the color adjustment parameter is input through the input unit.

6. The video conversion device according to claim 5 , wherein the display unit displays an analysis result of a part of the edited and processed video as color-adjusted by the color adjustment unit and displayed on the display screen, which part is selected through the input unit, on the display screen.

7. The video conversion device according to claim 6 , wherein the display screen of the display unit has an area for displaying the video and an area for displaying the analysis result of the part selected through the input unit and/or the result of the video analysis in the video analysis unit.

8. The video conversion device according to claim 6 , wherein the display unit displays a warning on the display screen when pixels of the video depart from the color space of the final output device or when the analysis result of the part selected through the input unit departs from the color space of the final output device.

9. The video conversion device according to claim 6 , wherein the controller further includes an alert unit issuing an audible warning when pixels of the video depart from the color space of the final output device or when the analysis result of the part selected through the input unit departs from the color space of the final output device.

10. The video conversion device according to claim 6 , wherein the controller is connected to the color adjustment unit via a line and causes the color adjustment unit to perform the color adjustment depending on the color adjustment parameter based on control of the control unit.

11. The video conversion device according to claim 1 , further comprising an output unit outputting a color adjustment value and/or a color adjustment reference table from the color adjustment unit and/or a low-resolution and/or compressed image of an edited and processed video having the colors in the final output device or the standard color space for output, which video has been color-adjusted by the color adjustment unit.

12. The video conversion device according to claim 1 , wherein a color adjustment value and/or a color adjustment reference table from the color adjustment unit and/or an image of an edited and processed video as color-adjusted by the color adjustment unit is output as associated with a date and/or a time code upon shooting.

13. A photography system for a motion picture system, comprising:
a plurality of cameras;
a plurality of video conversion devices that are so disposed as to correspond to the plurality of cameras, respectively;
checking display devices that are so disposed as to correspond to the plurality of the video conversion devices, respectively;
a captured video storage device storing the camera video data signals captured with the plurality of cameras; and
an edited and processed video

Assignees

• Fujifilm Corp

Inventors

• Iwaki Yasuharu
• Uchida Mitsuhiro

Classifications

• H04N23/70

  Circuitry for compensating brightness variation in the scene · CPC title

• H04N23/85

  for matrixing · CPC title

• H04N11/20 Primary

  Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards · CPC title

• H04N9/67

  for matrixing (camera processing pipelines for matrixing of colour signals H04N23/85) · CPC title

• H04N1/6052 Primary

  Matching two or more picture signal generators or two or more picture reproducers · CPC title