Image-shooting apparatus capable of performing super-resolution processing
View Patent ↗A super-resolution processing portion has a high-resolution image generation portion that fuses a plurality of first input images together to generate a high-resolution image. The first input images are shot at a shutter speed equal to or faster than the super-resolution limit shutter speed, which is the lower-limit shutter speed that enables super-resolution processing to make the resolution of the output image equal to or higher than that of the input images. According to the amount of exposure, one of the following different methods for super-resolution processing is selected: a first method that yields as the output image the high-resolution image; a second method that yields as the output image a weighted added image resulting from weighted addition of the high-resolution image and an image based on an averaged image; and a third method that yields as the output image a weighted added image resulting from weighted addition of the high-resolution image and an image based on a second input image.
1. An image-shooting apparatus comprising:
an image-shooting portion generating an input image by shooting; and
a super-resolution processing portion performing super-resolution processing on a plurality of input images obtained from the image-shooting portion to generate an output image having a resolution equal to or higher than a resolution of the input images;
wherein a shutter speed at which the image-shooting portion shoots at least one of the input images is made equal to or faster than a super-resolution limit shutter speed, which is a lower-limit shutter speed that enables the super-resolution processing to make the resolution of the output image equal to or higher than the resolution of the input images; further
wherein there are a plurality of methods for the super-resolution processing performed by the super-resolution processing portion, and the super-resolution processing portion performs one of the plurality of methods selected based on an amount of exposure in the image-shooting portion,
wherein the super-resolution processing portion includes;
a high-resolution image generation portion fusing the plurality of input images together to generate a high-resolution image;
an averaging processing portion that applies averaging processing to the plurality of input images to generate an averaged image; and
a weighted addition processing portion performing weighted addition processing on the high-resolution image and a predetermined image to generate a weighted added image, and
when the amount of exposure is less than a first threshold value, the weighted addition processing portion generates the weighted added image by performing weighted addition processing on the high-resolution image and an image based on the averaged image, and
the weighted added image is taken as the output image.
2. An image-shooting apparatus comprising:
an image-shooting portion generating an input image by shooting; and
a super-resolution processing portion performing super-resolution processing on a plurality of input images obtained from the image-shooting portion to generate an output image having a resolution equal to or higher than a resolution of the input images;
wherein a shutter speed at which the image-shooting portion shoots at least one of the input images is made equal to or faster than a super-resolution limit shutter speed, which is a lower-limit shutter speed that enables the super-resolution processing to make the resolution of the output image equal to or higher than the resolution of the input images; further
wherein there are a plurality of methods for the super-resolution processing performed by the super-resolution processing portion, and the super-resolution processing portion performs one of the plurality of methods selected based on an amount of exposure in the image-shooting portion,
wherein the super-resolution processing portion includes;
a high-resolution image generation portion fusing the plurality of input images together to generate a high-resolution image; and
a weighted addition processing portion performing weighted addition processing on the high-resolution image and a predetermined image to generate a weighted added image,
the input images comprises a first input image obtained by shooting at a shutter speed equal to or faster than the super-resolution limit shutter speed and a second input image obtained by shooting at a shutter speed slower than the super-resolution limit shutter speed, and
when the amount of exposure is less than a second threshold value, the weighted addition processing portion generates the weighted added image by performing weighted addition processing on the high-resolution image and an image based on the second input image, and
the weighted added image is taken as the output image.
3. The image-shooting apparatus according to claim 1 , wherein
the input images comprises a first input image obtained by shooting at a shutter speed equal to or faster than the super-resolution limit shutter speed and a second input image obtained by shooting at a shutter speed slower than the super-resolution limit shutter speed, and
when the amount of exposure is less than a second threshold value which is less than the first threshold value,
the weighted addition processing portion generates the weighted added image by performing weighted addition processing on the high-resolution image and an image based on the second input image, and
the weighted added image is taken as the output image.
4. The image-shooting apparatus according to claim 1 , wherein
when the amount of exposure is less than a second threshold value which is less than the first threshold value,
an image based on the averaged image is taken as the output image.
5. An image-shooting apparatus comprising:
an image-shooting portion generating an input image by shooting; and
a super-resolution processing portion performing super-resolution processing on a plurality of input images obtained from the image-shooting portion to generate an output image having a resolution equal to or higher than a resolution of the input images;
wherein a shutter speed at which the image-shooting portion shoots at least one of the input images is made equal to or faster than a super-resolution limit shutter speed, which is a lower-limit shutter speed that enables the super-resolution processing to make the resolution of the output image equal to or higher than the resolution of the input images; further
wherein there are a plurality of methods for the super-resolution processing performed by the super-resolution processing portion, and the super-resolution processing portion performs one of the plurality of methods selected based on an amount of exposure in the image-shooting portion,
an image display portion displaying an image,
wherein, before shooting of the input images, which of the methods for super-resolution processing is expected to be selected based on the amount of exposure is displayed and indicated on the display portion.