US 9,288,392 B2Granted

Image capturing device capable of blending images and image processing method for blending images thereof

AssigneeAltek Semiconductor Corp.

InventorsChe-Lun Chuang, Hong-Long Chou

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Abstract

An image capturing device and an image processing method are provided. The present method includes following steps. A first image and a second image are captured with a first focal length and a second focal length correspondingly. The motion corrected second image is produced by performing geometric correction procedure on the second image. A gradient operation is performed on each of the pixels of the first image to obtain a plurality of first gradients, and the gradient operation is performed on each of the pixels of the motion corrected second image to obtain a plurality of second gradients. The first gradients and the second gradients are compared and a first parameter map is generated according to the comparison results. A blending image is produced in according with the first parameter map and the first image, and an output image is produced at least in according with the blending image.

Claims14

Dependent claims

An image processing method, adapted to an image capturing device, the image processing method comprising:

capturing a first image with a first focal length, and capturing a second image with a second focal length, wherein the first focal length is focused on at least one main object;
performing a geometric calibration procedure on the second image to produce the motion calibrated second image;
performing a gradient operation on each pixel of the first image to produce a plurality of first gradients, and performing the gradient operation on each pixel of the motion calibrated second image to produce a plurality of second gradients;
comparing each of the first gradients and the corresponding second gradient to generate a plurality of first pixel comparison results, and generating a first parameter map according to the first pixel comparison results;
and
producing a blending image according to the first parameter map and the first image, and producing an output image at least in accordance with the blending image,
wherein the step of comparing each of the first gradients and the corresponding second gradient to generate the first pixel comparison results, and generating the first parameter map according to the first pixel comparison results comprises:
dividing the second gradients by the corresponding first gradients to generate a plurality of gradient comparison values;
and
generating a plurality of parameters according to the gradient comparison values, and recording the parameters as the first parameter map.

7 more elements

An image capturing device, comprising:

an image capturing module, comprising a zoom lens and a photosensitive element, capturing a first image with a first focal length and capturing a second image with a second focal length, wherein the first focal length is focused on at least one main object;
and
a processor, configured to execute a plurality of modules to:
perform a geometric calibration procedure on the second image to produce the motion calibrated second image;
perform a gradient operation on each pixel of the first image to produce a plurality of first gradients, and performing the gradient operation on each pixel of the motion calibrated second image to produce a plurality of second gradients;
compare each of the first gradients and the corresponding second gradient to generate a plurality of first pixel comparison results, and generating a first parameter map according to the first pixel comparison results;
and
produce a blending image according to the first parameter map and the first image, and producing an output image at least in accordance with the blending image,
wherein the processor is configured to execute the modules to divide the second gradients by the corresponding first gradients to generate a plurality of gradient comparison values, and generates a plurality of parameters according to the gradient comparison values, and records the parameters as the first parameter map.

6 more elements

Dependencies are inferred from the claim text.