Display control apparatus and method under plural different color spaces

• US 7,948,501 B2
• Filed: 03/04/2005
• Issued: 05/24/2011
• Est. Priority Date: 03/09/2004
• Status: Expired due to Fees

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Tanaka, Yoshinobu, Toyoda, Tetsuya, Ueno, Akira
• Primary Examiner(s): Wu; Xiao M
• Assistant Examiner(s): Welch; David T
• Application Number:
  US11/072,484
• Publication Number:
  US 20050200922A1
• Time in Patent Office: 2,272 Days
• Field of Search: 345/589, 345/590, 345/592, 345/593, 382/162
• US Class Current: 345/589
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 1/46 Colour picture communication systems
• CPC Class Codes: H04N 1/6011 with simulation on a subsidiary picture reproducer H04N1/622 takes precedence; matching two or more picture reproducers H04N1/6052
• CPC Class Codes: H04N 23/85 for matrixing
• CPC Class Codes: H04N 5/44504 Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
• CPC Class Codes: H04N 9/67 for matrixing camera processing pipelines for matrixing of colour signals H04N23/85

Abstract

A display control apparatus displays image data expressed under a plurality of different color spaces. A discriminating section discriminates color space information on image data to be displayed. A gain switching section switches between gains in accordance with a result of the discrimination and sets a gain adapted for the image data to be displayed. An amplifying section amplifies an image signal, generated based on the image data and relating to at least a color difference, in accordance with the gain set by the gain switching section.

Claims

1. A display control apparatus to display image data expressed under a plurality of different kinds of color spaces, the apparatus comprising:

a discriminating section which discriminates a kind of a color space of image data based on color space information of the image data to be displayed;

a memory which stores a display pattern comprised of on-screen display (OSD) data and a plurality of color palettes relating to the display pattern;

a palette selecting section which selects a desired color palette from the plurality of color palettes relating to the display pattern based on the kind of the color space discriminated by the discriminating section;

an OSD data generating section which generates display OSD data by converting the OSD data of the display pattern using the color palette selected by the palette selecting section;

a mixing section which mixes the display OSD data, generated by the OSD data generating section, with the image data, thereby generating display image data;

a gain switching section which switches gains to amplify the display image data mixed by the mixing section, in accordance with the kind of the color space discriminated by the discriminating section; and

an amplifying section which amplifies the display image data based on the switched gain, wherein

the amplifying section further comprises a separating section which separates the display image data into a luminance signal and a color difference signal, and amplifies only the color difference signal separated by the separating section based on the switched gain.

2. The display control apparatus according to claim 1, wherein the color space information is information recorded in a header of an image file, and the discriminating section discriminates the kind of the color space based on information recorded in the header.

3. The display control apparatus according to claim 1, wherein the color space information is a file name of a file including the image data to be displayed, and the discriminating section discriminates the kind of the color space based on the file name of the file including the image data.

4. The display control apparatus according to claim 1, wherein the color space information is a file management information including associating information of an image file to be displayed, and the discriminating section discriminates the kind of the color space based on the file management information.

5. The display control apparatus according to claim 1 further comprising:

an operation unit which sets a color space, wherein the discriminating section discriminates the kind of the color space based on information of the color space set by the operation unit.

6. The display control apparatus according to claim 1 further comprising:

a display unit which allows the color space information to be displayed therein.

7. The display control apparatus according to claim 1, wherein the gains in the gain switching section are preset as fixed values.

8. The display control apparatus according to claim 1, wherein the plurality of color palettes are set to display the display pattern in a suitable color saturation when the image signal is amplified by the amplifying section, after the color palette is mixed with the display image data.

9. The display control apparatus according to claim 1, wherein the gains which are switched by the gain switching section include a gain for sRGB and a gain for ADOBE®

RGB that is greater than the gain for sRGB.

10. A display control method for displaying image data expressed under a plurality of different kinds of color spaces, the method comprising:

discriminating, via a discriminating section, a kind of a color space of image data based on color space information of the image data to be displayed;

storing, in a memory, a display pattern comprised of on-screen display (OSD) data and a plurality of color palettes relating to the display pattern;

selecting, via a palette selecting section, a desired color palette from the plurality of color palettes relating to the display pattern based on the kind of the color space discriminated by the discriminating section;

generating display OSD data, via an OSD data generating section, by converting the OSD data of the display pattern using the color palette selected by the palette selecting section;

mixing, via a mixing section, the display OSD data generated by the OSD data generating section with the image data, thereby generating display image data;

switching gains to select one of a plurality of gains to amplify the display image data mixed by the mixing section, in accordance with the kind of the color space discriminated by the discrimination section;

separating, via a separating section of an amplifying section, the display image data into a luminance signal and a color difference signal; and

amplifying, via the amplifying section, only the color difference signal based on the selected one of the plurality of gains.

11. The display control method according to claim 10, wherein the color space information is information recorded in a header of an image file, and the discriminating section discriminates the kind of the color space based on information recorded in the header.

12. A display control method for displaying image data expressed under a plurality of different kinds of color spaces, the method comprising:

discriminating a kind of a color space of image data based on color space information of the image data to be displayed;

storing a display pattern comprised of on-screen display (OSD) data and a plurality of color palettes relating to the display pattern;

selecting a desired color palette from the plurality of color palettes relating to the display pattern based on the kind of the color space discriminated;

generating display OSD data by converting the OSD data of the display pattern using the color palette selected;

mixing the display OSD data with the image data, thereby generating display image data;

switching gains to select one of a plurality of gains to amplify the display image data, in accordance with the kind of the color space discriminated;

separating the display image data into a luminance signal and a color difference signal; and

amplifying only the color difference signal based on the selected one of the plurality of gains.