IMAGING APPARATUS, IMAGING METHOD, AND IMAGE SIGNAL PROCESSING PROGRAM

• US 20090015687A1
• Filed: 07/10/2008
• Published: 01/15/2009
• Est. Priority Date: 07/12/2007
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Endo, Kazuo, Shinkai, Mitsutoshi
• Granted Patent: US 8,077,229 B2
• Time in Patent Office: Days
• US Class Current: 348/222.100
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

Disclosed herein is an imaging apparatus for performing predetermined image signal processing on an image signal picked up by an image pickup device in order to convert the image signal for recording and display purposes, the imaging apparatus including, a parameter storage section, a parameter setting section, a gamma correction processing section, and a display-ready signal conversion section.

Claims

1. An imaging apparatus for performing predetermined image signal processing on an image signal picked up by an image pickup device in order to convert the image signal for recording and display purposes, said imaging apparatus comprising:

a parameter storage section configured to store output correction parameters used to output the picked-up image signal to the outside, and simulation correction parameters used in simulation mode subsequent to imaging;

a parameter setting section configured to select said simulation correction parameters if said simulation mode is set based on an externally designated input, and to select said output correction parameters if said simulation mode is canceled, the selected parameters being retrieved from said parameter storage section, said parameter setting section further changing the parameters for gamma correction between said simulation mode and non-simulation mode;

a gamma correction processing section configured to perform gamma correction processing on the input image signal based on either said output correction parameters or said simulation correction parameters set by said parameter setting section; and

a display-ready signal conversion section configured to convert into a display-ready signal said image signal having undergone the gamma correction based on said simulation correction parameters when said simulation mode is set.

2. The imaging apparatus according to claim 1, further comprising:

a metadata recording section configured such that together with identification information for identifying said simulation correction parameters, said metadata recording section either records said simulation correction parameters to metadata recording media from which the recorded parameters may be read by another apparatus, or outputs said simulation correction parameters to the outside.

3. The imaging apparatus according to claim 1, further comprising:

an image data recording section configured such that if said simulation mode is canceled and if said image signal having undergone said gamma correction based on said output correction parameters is to be either recorded to image recording media from which said image signal may be read by another apparatus or output to the outside, then said image data recording section attaches to said image signal said simulation correction parameters selected for said image signal.

4. The imaging apparatus according to claim 3, wherein said simulation correction parameters are associated with identification information for identifying said simulation correction parameters;

and

wherein said image data recording section attaches to said image signal said identification information for identifying said simulation correction parameters in place of said simulation correction parameters.

5. The imaging apparatus according to claim 1, wherein said simulation correction parameters include coefficients of a plurality of correction functions for changing characteristics of a gamma curve used by said gamma correction processing section, as well as an order in which to perform operations using said plurality of correction functions;

and

wherein said gamma correction processing section composes said plurality of correction functions defined by said simulation correction parameters and carries out gamma correction processing based on the composed correction functions.

6. An imaging method for performing predetermined image signal processing on an image signal picked up by an image pickup device in order to convert the image signal for recording and display purposes, said imaging method comprising the steps of:

storing into a parameter storage section output correction parameters used to output the picked-up image signal to the outside, and simulation correction parameters used in simulation mode subsequent to imaging;

selecting either said simulation correction parameters if said simulation mode is set based on an externally designated input, or said output correction parameters if said simulation mode is canceled, the selected parameters being read from said parameter storage section by said parameter setting section;

changing the parameters for gamma correction between said simulation mode and non-simulation mode;

performing gamma correction processing on the input image signal based on either said output correction parameters or said simulation correction parameters set in said parameter selecting step by said gamma correction processing section; and

converting into a display-ready signal said image signal having undergone the gamma correction based on said simulation correction parameters when said simulation mode is set by said display-ready signal converting section.

7. An image signal processing program for causing a computer to perform predetermined image signal processing on an image signal picked up by an image pickup device for correction purposes, said image signal processing program comprising the steps of:

storing into a parameter storage section output correction parameters used to output the picked-up image signal to the outside, and simulation correction parameters used in simulation mode subsequent to imaging;

selecting either said simulation correction parameters if said simulation mode is set based on an externally designated input, or said output correction parameters if said simulation mode is canceled, the selected parameters being retrieved from said parameter storage section by said parameter setting section;

changing the parameters for gamma correction between said simulation mode and non-simulation mode;

performing gamma correction processing on the input image signal based on either said output correction parameters or said simulation correction parameters set in said parameter selecting step by said gamma correction processing section; and

converting into a display-ready signal said image signal having undergone the gamma correction based on said simulation correction parameters when said simulation mode is set by said display-ready signal converting sections.

8. An imaging apparatus for performing predetermined image signal processing on an image signal picked up by an image pickup device in order to convert the image signal for recording and display purposes, said imaging apparatus comprising:

parameter storage means for storing output correction parameters used to output the picked-up image signal to the outside, and simulation correction parameters used in simulation mode subsequent to imaging;

parameter setting means for selecting said simulation correction parameters if said simulation mode is set based on an externally designated input, and to select said output correction parameters if said simulation mode is canceled, the selected parameters being retrieved from said parameter storage means, said parameter setting means further changing the parameters for gamma correction between said simulation mode and non-simulation mode;

gamma correction processing means for performing gamma correction processing on the input image signal based on either said output correction parameters or said simulation correction parameters set by said parameter setting means; and

display-ready signal conversion means for converting into a display-ready signal said image signal having undergone the gamma correction based on said simulation correction parameters when said simulation mode is set.