Image processing apparatus, electronic camera, and medium storing image processing program
First Claim
1. An image processing apparatus generating a synthesized image from (i) a first image obtained by image-capturing at a first exposure amount, and (ii) a second image obtained by image-capturing at a second exposure amount larger than the first exposure amount, wherein the image processing apparatus comprises:
- a processor configured to;
perform a low-pass processing on the first image;
select a gradation curve for a gradation conversion processing, from among a plurality of gradation curves;
perform the gradation conversion processing on the first image on which the low-pass processing is performed according to the selected gradation curve; and
generate the synthesized image from the first image on which the low-pass processing has not been performed and the second image by using the first image on which the low-pass processing and the gradation conversion processing has been performed.
1 Assignment
0 Petitions
Accused Products
Abstract
In an image processing apparatus performing synthetic processing on N number of images (where N is an integer of two or larger) being captured from a same photographic scene under mutually different exposure conditions to generate a synthetic image with a higher dynamic range than the N number of images, obtaining the N number of images, and performing low-pass processing on at least one image among the N number of images to generate a low-pass image. Then, a weighting amount in the synthetic processing is decided based on the low-pass image, and the synthetic processing is performed on the N number of images according to the decided weighting amount to generate the synthetic image. Accordingly, a natural synthetic image with fewer changes in contrast, hue, and chroma is generated in a simple configuration when generating the synthetic image.
40 Citations
10 Claims
-
1. An image processing apparatus generating a synthesized image from (i) a first image obtained by image-capturing at a first exposure amount, and (ii) a second image obtained by image-capturing at a second exposure amount larger than the first exposure amount, wherein the image processing apparatus comprises:
a processor configured to; perform a low-pass processing on the first image; select a gradation curve for a gradation conversion processing, from among a plurality of gradation curves; perform the gradation conversion processing on the first image on which the low-pass processing is performed according to the selected gradation curve; and generate the synthesized image from the first image on which the low-pass processing has not been performed and the second image by using the first image on which the low-pass processing and the gradation conversion processing has been performed. - View Dependent Claims (2, 3, 4, 5)
-
6. An image-capturing apparatus generating a synthesized image from (i) a first image obtained by image-capturing at a first exposure amount, and (ii) a second image obtained by image-capturing at a second exposure amount larger than the first exposure amount, wherein the image-capturing apparatus comprises:
-
an image-capturing sensor; and a processor configured to; perform a low-pass processing on the first image; select a gradation curve used for a gradation conversion processing from among a plurality of gradation curves; perform the gradation conversion processing on the first image on which the low-pass processing is performed according to the selected gradation curve; and generate the synthesized image from the first image on which the low-pass processing has not been performed and the second image by using the first image on which the low-pass processing and the gradation conversion processing has been performed. - View Dependent Claims (7, 8, 9, 10)
-
Specification