IMAGE PICKUP APPARATUS AND IMAGE PICKUP METHOD

• US 20150326797A1
• Filed: 05/01/2015
• Published: 11/12/2015
• Est. Priority Date: 05/08/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ohyama, Nana
• Granted Patent: US 9,386,237 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06T 2207/20192 Edge enhancement; Edge preservation
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting
• CPC Class Codes: G06T 5/10 using non-spatial domain filtering
• CPC Class Codes: G06T 5/70 Denoising; Smoothing
• CPC Class Codes: G06T 5/73 Deblurring; Sharpening
• CPC Class Codes: G06T 7/13 Edge detection
• CPC Class Codes: H04N 23/63 by using electronic viewfinders
• CPC Class Codes: H04N 23/80 Camera processing pipelines; Components thereof
• CPC Class Codes: H04N 5/265 Mixing

Abstract

An image processing device performs image processing on an image being captured to display the image on a display unit having a resolution lower than a resolution of the image. The image processing device includes an extraction section that extracts an edge component from the image, an edge enhancing section that enhances the edge component by performing low-pass filter processing on the edge component after performing full-wave rectification processing on the edge component, a combining section that combines the enhanced edge component with the image to generate a composite image, and a resolution conversion section that performs resolution conversion of the composite image to match a resolution of the composite image with the resolution of the display unit.

Claims

1. An image pickup apparatus comprising:

an image-pickup unit configured to capture an image;

a display unit configured to display an image at a resolution lower than a resolution at which the image-pickup unit can capture the image; and

an image processing unit configured to perform image processing for displaying the image captured by the image-pickup unit on the display unit,

wherein the image processing unit includes

an extraction section that extracts an edge component from the image,

an edge processing section that performs processing for enhancing the edge component by performing low-pass filter processing on the edge component after performing full-wave rectification processing on the edge component,

a combining section that combines the enhanced edge component with the image to generate a composite image, and

a resolution conversion section that performs resolution conversion of the composite image so as to match a resolution of the composite image with the resolution of the display unit.

2. The image pickup apparatus according to claim 1, wherein the combining section combines the enhanced edge component with a luminance component of the image.

3. The image pickup apparatus according to claim 1, wherein the combining section performs processing for coloring the enhanced edge component.

4. The image pickup apparatus according to claim 1, wherein the combining section combines the enhanced edge component with the image that has been converted into a monochrome image.

5. The image pickup apparatus according to claim 1, further comprising a selecting unit configured to perform selection of whether each of the enhanced edge component and a part other than the edge component is to be displayed in color or monochrome, with respect to the composite image.

6. The image pickup apparatus according to claim 1, wherein, in a case where a peaking display function of enhancing the edge component and displaying the enhanced edge component is disabled, the image processing unit causes the resolution conversion section to perform resolution conversion of the image so as to match a resolution of the image with the resolution of the display unit without causing the edge processing section to perform edge processing, and the display unit displays the image subjected to the resolution conversion.

7. An image pickup method comprising:

capturing an image using an image-pickup unit;

performing image processing for displaying the image captured by the image-pickup unit on a display unit having a resolution lower than a resolution of the image;

displaying the image subjected to the image processing on the display unit;

wherein the performing image processing includes

extracting an edge component from the image,

performing edge processing for enhancing the edge component by performing low-pass filter processing on the edge component after performing full-wave rectification processing on the edge component,

combining the enhanced edge component with the image to generate a composite image, and

performing resolution conversion of the composite image to match a resolution of the composite image with the resolution of the display unit.