METHOD OF FORMING AN IMAGE BASED ON A PLURALITY OF IMAGE FRAMES, IMAGE PROCESSING SYSTEM AND DIGITAL CAMERA
First Claim
1. Method of forming a combined image based on a plurality of image frames, including:
- obtaining a first set (18;
30;
47;
64) of at least one array of intensity values for representing an image frame at a resolution corresponding to the number of intensity values in the array, and obtaining a second set (19;
31;
46;
61) of at least one array of intensity values for representing an image frame at a resolution corresponding to the number of intensity values in the array,wherein the combined image is represented by a final array (20;
42;
54;
71) of intensity values,wherein at least some of the intensity values in the final array (20;
42;
54;
71) are each obtained by executing a step (29;
41;
57;
70) of summing an intensity value from each of at least one array (27;
39;
56;
69) of intensity values based on at least one array of intensity values in only the first set (18;
30;
47;
64) and an intensity value from each of at least one array (19;
40;
46;
61) of intensity values based on at least one array of intensity values in only the second set (19;
31;
46;
61), wherein, prior to executing the summing step (29;
41;
57;
70), only the intensity values of the arrays in the first set (18;
30;
47;
64) are mapped from a scale within a first range to a scale within a second range.
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Accused Products
Abstract
Image fusion based on a modified method of frame averaging for noise removal by partly averaging over images having a smaller resolution than the desired resolution of the de-noised image. The set of images which are summed for averaging out noise consists of two subsets. The first set of images has a resolution (in terms of number of pixels) being smaller than the resolution of the images in the second set. The resolution of the images in the second set is the resolution of the ‘high-definition’ de-noised output image. The lower resolution images are up-sampled by scaling their pixel numbers to that desired output image. The gradation of the first set images is also adapted to avoid intensity saturation (flare) due to sommation. Image fusing is also done in fourier space using the high frequency components from the higher resolution images and the lower ones from the lower resolution images.
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Citations
11 Claims
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1. Method of forming a combined image based on a plurality of image frames, including:
-
obtaining a first set (18;
30;
47;
64) of at least one array of intensity values for representing an image frame at a resolution corresponding to the number of intensity values in the array, and obtaining a second set (19;
31;
46;
61) of at least one array of intensity values for representing an image frame at a resolution corresponding to the number of intensity values in the array,wherein the combined image is represented by a final array (20;
42;
54;
71) of intensity values,wherein at least some of the intensity values in the final array (20;
42;
54;
71) are each obtained by executing a step (29;
41;
57;
70) of summing an intensity value from each of at least one array (27;
39;
56;
69) of intensity values based on at least one array of intensity values in only the first set (18;
30;
47;
64) and an intensity value from each of at least one array (19;
40;
46;
61) of intensity values based on at least one array of intensity values in only the second set (19;
31;
46;
61), wherein, prior to executing the summing step (29;
41;
57;
70), only the intensity values of the arrays in the first set (18;
30;
47;
64) are mapped from a scale within a first range to a scale within a second range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11)
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9. System for processing arrays of intensity values, each array being suitable for representing an image frame at a resolution corresponding to the number of intensity values in the array,
wherein the system is configured to retrieve a first set (18; -
30;
47;
64) of at least one array of intensity values and a second set (19;
31;
46;
61) of at least one array of intensity values, the arrays in the first set (18;
30;
47;
64) and arrays in the second set representing respective image frames, and to form a final array (20;
42;
54;
71) of intensity values representing a combined image, wherein the system is configured to obtain each of at least some of the intensity values in the final array (20;
42;
54;
71) by executing a step of summing an intensity value from each of at least one array (27;
39;
56;
69) of intensity values based on at least one array of intensity values in only the first set (18;
30;
47;
64) and an intensity value from each of at least one array of intensity values based on at least one array (19;
40;
46;
61) of intensity values in only the second set (19;
31;
46;
61), and wherein the system is configured to map, prior to executing the summing step, only the intensity values of the arrays in the first set (18;
30;
47;
64) from a scale within a first range to a scale within a second range.
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30;
Specification