Image data processing apparatus and electronic camera

• US 20020044778A1
• Filed: 09/05/2001
• Published: 04/18/2002
• Est. Priority Date: 09/06/2000
• Status: Abandoned Application

• Current Assignee: Nikon Corporation
• Original Assignee: Nikon Corporation
• Inventors: Suzuki, Masahiro
• Application Number:
  US09/945,847
• Publication Number:
  US 20020044778A1
• Time in Patent Office: Days
• US Class Current: 396/429
• CPC Class Codes: G06T 3/4015 Image demosaicing, e.g. colour filter arrays [CFA] or Bayer patterns
• CPC Class Codes: H04N 1/3935 with modification of image resolution, i.e. determining the values of picture elements at new relative positions
• CPC Class Codes: H04N 1/56 Processing of colour picture signals H04N1/52 takes precedence
• CPC Class Codes: H04N 23/00 Cameras or camera modules comprising electronic image sensors; Control thereof

Abstract

An image data processing apparatus includes a data size conversion device that changes a data size of an image data at an optional ratio, the image data has a plurality of pixels each of which includes any one of a plurality of color components, and the plurality of color components being arranged in a specific order. The data size conversion device newly calculates a value of color component of each pixel after changing the data size based upon values of color components of a plurality of same color pixels before changing the data size, while maintaining the order of arrangement of the plurality of color components.

Claims

1. An image data processing apparatus comprising:

a data size conversion device that changes a data size of an image data at an optional ratio, the image data having a plurality of pixels each of which includes any one of a plurality of color components, the plurality of color components being arranged in a specific order, wherein

said data size conversion device newly calculates a value of color component of each pixel after changing the data size based upon values of color components of a plurality of same color pixels before changing the data size, while maintaining the order of arrangement of the plurality of color components.

2. An image data processing apparatus according to claim 1, further comprising:

an interpolation processing device that performs interpolation processing to obtain a value of color component that a corresponding pixel does not possess, wherein

said data size conversion device changes the data size of the image data before the image data is subjected to interpolation processing by said interpolation processing device.

3. An image data processing apparatus according to claim 2, further comprising:

a changeover device that changes over image data to be supplied to said interpolation device between image data a data size of which has been changed by said data size conversion device and image data a data size of which has not been changed by said data size conversion device, wherein

said interpolation processing device performs the interpolation processing with a common algorithm on both the image data the data size of which has been changed and the image data the data size of which has not been ch anged.

4. An image data processing apparatus according to claim 1, wherein

said data size conversion device calculates the value of color component of each pixel after changing the data size by taking a relative positional relationship between the each pixel after changing the data size and the plurality of same color pixels before changing the data size.

5. An image data processing apparatus, comprising:

a color separation device in which a plurality of color filters, each of which passes light of one of a plurality of color components, are arranged in a specified order, and which separates an image of a subject into said plurality of color components;

an imaging device which images the image of the subject which has been color-separated by said color separation device with a plurality of pixels;

an A/D conversion device which A/D converts an image signal outputted from said imaging device; and

a data size conversion device which changes a data size of the image data after A/D conversion at an optional ratio, wherein

said data size conversion device newly calculates a value of color component of each pixel after changing the data size based upon values of color components of a plurality of same color pixels before changing the data size, while maintaining the order of arrangement of the plurality of color components.

6. An electronic camera comprising:

a color separation device in which a plurality of color filters, each of which passes light of one of a plurality of color components, are arranged in a specified order, and which separates an image of a subject into said plurality of color components;

an imaging device which images the image of the subject which has been color-separated by said color separation device with a plurality of pixels;

an A/D conversion device which A/D converts an image signal outputted from said imaging device; and

a data size conversion device which changes a data size of the image data after A/D conversion at an optional ratio, wherein

said data size conversion device newly calculates a value of color component of each pixel after changing the data size based upon values of color components of a plurality of same color pixels before changing the data size, while maintaining the order of arrangement of the plurality of color components.

7. An image data processing method comprising:

obtaining an image data that has a plurality of pixels each of which includes any one of a plurality of color components which are arranged in a specific order; and

changing a data size of the image data at an optional ratio, wherein

a value of color component of each pixel after changing the data size is newly calculated based upon values of color components of a plurality of same color pixels before changing the data size in order to change the data size while maintaining the order of arrangement of the plurality of color components.

8. A computer-readable computer program product containing a control program for image data size conversion processing, the control program comprising instructions of:

obtaining an image data that has a plurality of pixels each of which includes any one of a plurality of color components which are arranged in a specific order; and

changing a data size of the image data at an optional ratio, wherein

a value of color component of each pixel after changing the data size is newly calculated based upon values of color components of a plurality of same color pixels before changing the data size in order to change the data size while maintaining the order of arrangement of the plurality of color components.

9. A computer-readable computer program product according to claim 8, wherein the computer-readable computer program product is a recording medium on which the control program is recorded.

10. A computer-readable computer program product according to claim 8, wherein the computer-readable computer program product is a carrier wave in which the control program is embodied as a data signal.