Method and apparatus for capturing an image
A method for capturing an image using an image capturing module with multiple pixels configured in a 2-dimensional matrix and a focal plane electronic shutter function which sequentially slides the exposure timing by constant interval by pixel group which is a unit of predetermined number of the pixels while scanning; the method includes an image data input process for detecting shutter operation, obtaining a reference image while skipping one or more of the pixel groups by sequentially sliding the exposure timing by the constant interval, and obtaining a target image while not skipping pixel groups to be captured, a motion data detection process for calculating the motion data of the target image based on the reference image, and a distortion compensation process for compensating for distortion in the target image according to the motion data.
1. A method for capturing an image using an image capturing module with multiple pixels configured in a 2-dimensional matrix and a focal plane electronic shutter function which sequentially slides the exposure timing by constant interval by pixel group which is a unit of predetermined number of the pixels while scanning, comprising:
an image data input process for detecting shutter operation, obtaining a reference image while skipping one or more of the pixel groups by sequentially sliding the exposure timing by said constant interval, and obtaining a target image while not skipping pixel groups to be captured;
a motion data detection process for calculating the motion data of the target image based on the reference image; and
a distortion compensation process for compensating for distortion in the target image according to the motion data.
2. The method for capturing an image according to claim 1 , further comprising:
obtaining multiple target images;
executing said motion data detection process and said distortion compensation process to each target image to obtain a distortion compensated image of each target image; and
an image synthesizing process for synthesizing the distortion compensated images together.
3. The method for capturing an image according to claim 2 ,
wherein said image capturing module is a CMOS sensor.
4. An image capturing apparatus with multiple pixels configured in a 2-dimensional matrix and a focal plane electronic shutter function which sequentially slides the exposure timing by constant interval by pixel group which is a unit of predetermined number of the pixels while scanning; the image capturing apparatus captures multiple image data in a single shutter operation, comprising:
a timing generation means that has a pixel skip mode where one or more of the pixel groups are skipped while scanning by sequentially sliding the exposure timing by said constant interval and a normal mode where each group to be captured is sequentially scanned without pixel skipping; the timing generation means detects shutter operation and outputs an operation signal to an image capturing module according to each of said modes;
an image data input means for obtaining image data captured in the pixel skip mode and multiple image data captured in the normal mode from the image capturing module;
an input image data storage means for storing an image data captured in the pixel skip mode as reference image and image data captured in the normal mode as target images;
a size adjustment means for matching the sizes of the reference image and the target images;
a motion data detection means for calculating the motion data between the reference image and each of the multiple target images by executing a block matching process using the reference image and the target images output from the size adjustment means;
a distortion compensation means for compensate distortion in each target image stored in the input data storage means according to the motion data detected by said motion data detection means; and
an image synthesizing means for creating an synthesized image by synthesizing images output from the distortion compensation means.