Search

JP-2026076000-A - Image processing device, imaging device, control method, and program

JP2026076000AJP 2026076000 AJP2026076000 AJP 2026076000AJP-2026076000-A

Abstract

[Problem] To provide a technology that enables the association of appropriate authenticity assurance information with synthesized images. [Solution] An image processing apparatus is provided, comprising association means for associating first authenticity assurance information, which includes information for guaranteeing the authenticity of a first image, with the first authenticity assurance information, which is configured to identify whether the first image is a composite image generated by combining multiple captured images corresponding to multiple exposures, or a non-composite image captured in a single exposure. [Selection Diagram] Figure 3

Inventors

  • 西口 達也

Assignees

  • キヤノン株式会社

Dates

Publication Date
20260511
Application Date
20241023

Claims (10)

  1. The system includes association means for associating first authenticity assurance information, which includes information for guaranteeing the authenticity of the first image, with the first image. The first authenticity assurance information is configured to identify whether the first image is a composite image generated by combining multiple captured images corresponding to multiple exposures, or a non-composite image captured in a single exposure. An image processing apparatus characterized by the following:
  2. If the first image is the composite image, the first authenticity assurance information includes first information indicating that the first image is the composite image. If the first image is the non-composite image, the first authenticity assurance information includes second information indicating that the first image is the non-composite image. The image processing apparatus according to feature 1.
  3. If the first image is the composite image, the association means associates a plurality of second authenticity assurance pieces of information with the first image. The plurality of second authenticity assurance information includes a plurality of thumbnail images corresponding to the plurality of captured images, and information for guaranteeing the authenticity of the plurality of thumbnail images. The image processing apparatus according to feature 1.
  4. The aforementioned plurality of second authenticity assurance information includes information for ensuring the authenticity of the plurality of captured images, The image processing apparatus according to claim 3.
  5. The system further comprises a synthesis means for generating the first image, which is the composite image, by combining the plurality of captured images, When each of the multiple second authenticity information is associated with a separate one of the multiple captured images, and each of the multiple second authenticity information includes information for guaranteeing the authenticity of the corresponding captured image, the association means associates the first authenticity information with the first image which is the composite image. If each of the plurality of second authenticity assurance pieces is not associated with a separate one of the plurality of captured images, the association means refrains from associating the first authenticity assurance piece with the first image which is the composite image. The image processing apparatus according to feature 1.
  6. If each of the plurality of second authenticity assurance information is associated with a separate one of the plurality of captured images, the association means associates the plurality of second authenticity assurance information with the first image which is the composite image. The plurality of second authenticity assurance information includes a plurality of thumbnail images corresponding to the plurality of captured images, and information for guaranteeing the authenticity of the plurality of thumbnail images. The image processing apparatus according to feature 5.
  7. The system further includes a selection means that, in accordance with user instructions, selects multiple image files from a recording medium that stores two or more image files, each containing a captured image. The synthesis means generates the first image, which is the synthesized image, by combining the multiple captured images contained in the multiple image files. The image processing apparatus according to feature 5.
  8. An image processing apparatus according to any one of claims 1 to 7, A shooting means for capturing the aforementioned multiple images, An imaging device characterized by comprising:
  9. A control method performed by an image processing device, The system includes an association step of associating first authenticity assurance information, which includes information for guaranteeing the authenticity of the first image, with the first image. The first authenticity assurance information is configured to identify whether the first image is a composite image generated by combining multiple captured images corresponding to multiple exposures, or a non-composite image captured in a single exposure. A control method characterized by the following:
  10. A program for causing a computer to function as one of the means of an image processing apparatus according to any one of claims 1 to 7.

Description

This invention relates to an image processing device, an imaging device, a control method, and a program. Traditionally, digital cameras have been proposed that include a function to add authenticity assurance information as verification data to guarantee that images taken with the digital camera have not been tampered with. For example, Patent Document 1 discloses a technique for embedding information (hash and signature value) that prohibits tampering into an image file when the image is captured in an image tamper-proof mode. Furthermore, in recent years, the need for authenticity assurance has been re-emphasized, with the emergence of C2PA, a technical standardization organization aimed at developing technical specifications that can guarantee the origin and reliability of content, enabling publishers, creators, and consumers to track the source of media. The C2PA standard allows for the storage of Manifest data within images generated during shooting or editing, as C2PA data. Manifest can store information such as the Actor (name of the camera or software that generated the image), hash value, claim signature (digital signature), and thumbnail image. Japanese Patent Publication No. 2008-005421 A block diagram showing an example configuration of the digital camera 100.A diagram showing an example of the structure of a composite image file containing multiple images.A diagram showing other examples of the configuration of a composite image file.A diagram showing an example of the structure of a non-composite image file.A flowchart for the process of adding authenticity assurance information to an image. The embodiments will be described in detail below with reference to the attached drawings. Note that the following embodiments do not limit the invention as defined in the claims. While multiple features are described in the embodiments, not all of these features are essential to the invention, and the features may be combined in any way. Furthermore, in the attached drawings, identical or similar configurations are given the same reference numerals, and redundant descriptions are omitted. [First Embodiment] Figure 1 is a block diagram showing an example configuration of a digital camera 100. The digital camera 100 is an example of an imaging device equipped with an image processing device. The imaging device may be, for example, a smartphone. Furthermore, a personal computer (PC) without a camera can perform the role of the image processing device in this embodiment. The barrier 10 is a protective member that covers the imaging unit, including the photographic lens 11, of the digital camera 100, thereby preventing dirt and damage to the imaging unit. Its operation is controlled by the barrier control unit 43. The photographic lens 11 forms an optical image on the imaging surface of the image sensor 13. The shutter 12 has an aperture function. The image sensor 13 is composed of, for example, a CCD or CMOS sensor, and converts the optical image formed on the imaging surface by the photographic lens 11 via the shutter 12 into an electrical signal. The A/D converter 15 converts the analog image signal output from the image sensor 13 into a digital image signal. The digital image signal converted by the A/D converter 15 is written to the memory 25 as so-called RAW image data. Simultaneously, development parameters corresponding to each RAW image data are generated based on the shooting information and written to the memory 25. These development parameters consist of various parameters used in image processing for recording images in formats such as JPEG, including exposure settings, white balance, color space, and contrast. The timing generator 14 is controlled by the memory control unit 22 and the system control unit 50, and supplies clock signals and control signals to the image sensor 13, A/D converter 15, and D/A converter 21. The image processing unit 20 performs various image processing operations, such as predetermined pixel interpolation, color conversion, correction, resizing, and image synthesis, on data from the A/D converter 15 or the memory control unit 22. The image processing unit 20 also performs predetermined image processing and calculations using the captured image data and provides the calculation results to the system control unit 50. The system control unit 50 controls the exposure control unit 40 and the focus control unit 41 based on the provided calculation results to realize autofocus (AF), automatic exposure (AE), and flash pre-flash (EF) processing. Furthermore, the image processing unit 20 performs predetermined calculations using the image data obtained from the capture, and also performs auto white balance (AWB) processing based on the obtained calculation results. In addition, the image processing unit 20 reads the image data stored in the memory 25 and performs compression or decompression processing using methods such as JPEG, MPEG-4 AVC, High Efficiency Video Coding (HEVC),