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Image processing method and image acquisition device

An image acquisition device and image processing technology, applied to image communication, TV, color TV parts, etc., can solve the problems of discontinuous depth of field, not natural enough, unable to highlight multiple main objects, etc., and achieve good bokeh effect Effect

Active Publication Date: 2014-08-06
ALTEK SEMICON
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AI Technical Summary

Problems solved by technology

However, this method can easily lead to discontinuous or unnatural depth of field in the processed image.
In addition, if there are more than one subject within the focal length of the image, the above method only retains one of the subjects and blurs the other subjects in the same focus area, so that multiple subjects in the image cannot be highlighted

Method used

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  • Image processing method and image acquisition device
  • Image processing method and image acquisition device

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Embodiment Construction

[0032] The present invention proposes a method for generating a bokeh image from two images captured with different focal length values. First focus on at least one subject to be photographed and then shoot, then focus on the background or an infinitely distant place and then shoot. By comparing the content of the two images to determine the subject and background in focus, and then only keep the part of the subject, and blur the part of the background to produce an image with a bokeh effect. In order to make the content of the present invention clearer, the following examples are listed as examples in which the present invention can actually be implemented.

[0033] figure 1 It is a block diagram of an image acquisition device shown in an embodiment of the present invention. Please refer to figure 1 The image acquisition device 100 of this embodiment is, for example, a digital camera, a single-eye camera, a digital video camera, or other smart phones and tablet computers w...

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Abstract

The invention provides an image processing method and an image acquisition device. The method includes: acquiring a first image with first focal distance, and acquiring a second image with a second focal distance; obscuring the first image to generate an obscured image; geometrically correcting the second image to obtain a displacement-corrected image; executing gradient operation on each pixel point of the first image to generate multiple first gradient values, and executing gradient operation on each pixel point of the displacement-corrected image to generate multiple second gradient values; comparing the first gradient values and the corresponding second gradient values, and generating a bokeh map according to the comparison results; mixing the first image and the obscured image according to the bokeh map to generate a background-obscured image.

Description

technical field [0001] The present invention relates to an image processing method and an image acquisition device, and in particular to an image processing method and an image acquisition device for generating blurred background images. Background technique [0002] With the advancement of optical technology, cameras with adjustable aperture, shutter and even interchangeable lenses are becoming popular, and the functions of cameras are also becoming more diversified. Wherein, when using a camera to capture an image, in order to highlight the subject in the captured image, a so-called bokeh shooting technique is generally adopted. Bokeh means that in photographic imaging with a shallow depth of field, images falling outside the depth of field will gradually produce a loose and blurred effect. That is to say, the photographer can focus the focal length of the camera lens to a specific distance range in the image, so that the objects outside this distance range are gradually ...

Claims

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Application Information

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IPC IPC(8): H04N5/232
Inventor 庄哲纶周宏隆
Owner ALTEK SEMICON
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