Abstract: A structured-light-based exposure control method and an exposure control apparatus are provided. The exposure control method includes projecting a plurality of structured lights with a plurality of scanning patterns by a projector with a first projector brightness on an object to scan the object, capturing a plurality of first images of the object corresponding to the scanning patterns, calculating a first stereo image according to the first images, projecting the structured lights with the scanning patterns by the projector with a second projector brightness on the object to scan the object, capturing a plurality of second images of the object corresponding to the scanning patterns, wherein the second projector brightness is less than the first projector brightness, calculating a second stereo image according to the second images, and stitching the first stereo image and the second stereo image to obtain a first complete stereo image.

Abstract: The invention provides a structured-light-based exposure control method and an exposure control apparatus. The exposure control method includes: performing a structured light scanning operation on an object according to a plurality of exposure conditions to generate a plurality of corresponding image groups; determining an optimal exposure condition among the exposure conditions, wherein a disqualified exposure value of an image group corresponding to the optimal exposure condition is smaller than disqualified exposure values of the other image groups, and the disqualified exposure values are determined by a number of overexposed pixels and a number of insufficient-confidence pixels in each of the image groups; and calculating a stereo image of the object according to the image group corresponding to the optimal exposure condition.

Abstract: A structured-light-based three-dimensional scanning method, an apparatus and a system thereof are proposed, where the method includes the following steps. Structured light with scanning patterns is subsequently projected onto a subject by a projector. When the structured light with each of the scanning patterns is projected onto the subject, images of the subject are captured by at least one image capturing device to generate an image set including the images, and tilt angles of the three-dimensional scanning system are measured by an angle detector to generate angle measurements respectively corresponding to each of the images. Whether an angle variation of the image set is too large is determined according to the angle measurements of the images therein, and the image set is flagged when the angle variation is too large. Stereo information of the subject is generated according to the image set when the image set is not flagged.

Abstract: A method for calibrating image deformation of an image capturing device having a first and second lens, a focusing actuator, and a prestored first focusing step-to-focusing distance relation includes the following steps. A plurality of image sets are captured by the first and second lens, where each of the image sets includes a first and second image, and the images sets include a reference image set. It is detected whether the reference image set is deformed. When the reference image set is detected to be deformed, the first focusing step-to-focusing distance relation is calibrated according to a focusing step and a focusing distance corresponding to each of the image sets, where the focusing step corresponding to each of the image sets is the number of steps that the focusing actuator is required to move the first and second lens to a focusing position to generate each of the image sets.

Abstract: A method for calibrating image deformation of an image capturing device having a first and second lens, a focusing actuator, and a prestored first focusing step-to-focusing distance relation includes the following steps. A plurality of image sets are captured by the first and second lens, where each of the image sets includes a first and second image, and the images sets include a reference image set. It is detected whether the reference image set is deformed. When the reference image set is detected to be deformed, the first focusing step-to-focusing distance relation is calibrated according to a focusing step and a focusing distance corresponding to each of the image sets, where the focusing step corresponding to each of the image sets is the number of steps that the focusing actuator is required to move the first and second lens to a focusing position to generate each of the image sets.

Abstract: A method for capturing a three dimensional (3D) image by using a single-lens camera is provided. First, a first image is captured. According to a focus distance of the single-lens camera in capturing the first image and an average distance between two human eyes, an overlap width between the first image and a second image required for capturing the second image of the 3D image is calculated. Then, the first image and a real-time image captured by the single-lens camera are displayed, and an overlap area is marked on the first image according to the calculated overlap width. A horizontal shift of the single-lens camera is adjusted, to locate the real-time image in the overlap area. Finally, the real-time image is captured as the second image, and the first and second images are output as the 3D image.

Abstract: An image capturing apparatus and an image correction method thereof are provided. The image capturing apparatus comprises an image capturing module, a sensing module, a storage module, and a processing module. The image capturing module captures an image. The sensing module senses an included angle between the image capturing apparatus and a horizontal plane. The storage module stores a rotation compensation data table containing a plurality of offset angles and a plurality of rotation compensation values for pixels corresponding to each offset angle. According to a difference value between the angle and a preset angle, the processing module finds out the appropriate rotation compensation values in the rotation compensation data table for rotating and correcting the image. A calibrated image is then generated, and the calibrated image matches the image captured by the image capturing device at the preset angle.

Abstract: An image processing method, applicable to a digital image device, includes the following steps. At least one original image of different brightness ranges is captured, and more images of different brightness ranges are generated from the original image by using an image post-processing technique. Based on characteristics of the image of each brightness range, the weights of the image of each brightness range are defined. Then, hierarchical fusion is performed on the images of the different brightness ranges according to weight relations, so as to form a high-dynamic-range image capable of presenting features of each brightness range.

Abstract: A method for assisting in focal length detection is applicable to a digital camera having the flash. The method includes the following steps. First, the flash of the digital camera is actuated and a first image is captured. Afterwards, a characteristic exposure value of the first image is calculated. A focus range comparison table is looked up according to the characteristic exposure value to obtain an initial focus position. Then, a focus procedure is performed according to the initial focus position to obtain a target focal length.

Abstract: An electronic apparatus and an image capturing apparatus are provided. The image capturing apparatus comprises an image capturing module and a processing module. The image capturing module captures an image having a plurality of pixels. The processing module looks up a table to process a rotation calibration or a tilt calibration toward the pixels to output a calibrated image.

Abstract: A method for adjusting photosensitiveness is able to determine a relative distance of an object in an image capture area through images captured before and after pre-flash of a flash lamp, so that the relative distance serves as a reference for adjusting current photosensitiveness of the digital camera, thereby capturing an image having better quality in a status that the flash lamp provides a fill light.

Abstract: A continuous focusing method for a digital camera is described, which is applicable to determine whether the digital camera performs a focusing procedure or not when the digital camera switches from a first scene to a second scene in a live view stage. The continuous focusing method includes the following steps. A preview image of a second scene is obtained. A blur detection procedure is performed on the preview image, so as to acquire a corresponding focus value. It is determined whether the focus value exceeds a focusing threshold value or not; if not, a focusing procedure is performed; otherwise, if the focus value is greater than the focusing threshold value, the digital camera still maintains a current focusing focal length, which represents that a focusing focal length of the second scene is the same as that of the first scene.

Abstract: A fast focusing method for a digital camera is applied in an auto focusing stage for judging whether the digital camera needs to be refocused. The fast focusing method includes recording a system time after a previous focusing (defined as a first time); capturing a system time before a current focusing (defined as a second time); performing a fuzziness detection procedure to acquire a focus value when a difference obtained by subtracting the first time from the second time is greater than a focusing time threshold; setting a focusing focal length range covering a reference focal length when the focus value is between a lower limit focusing threshold and an upper limit focusing threshold; capturing images at different focusing focal lengths respectively in the focusing focal length range; calculating a contrast value of each image; calculating a target focal length from the contrast values through a quadratic curve approximation method.

Abstract: An image capturing apparatus and an image correction method thereof are provided. The image capturing apparatus comprises an image capturing module, a sensing module, a storage module, and a processing module. The image capturing module captures an image. The sensing module senses an included angle between the image capturing apparatus and a horizontal plane. The storage module stores a rotation compensation data table containing a plurality of offset angles and a plurality of rotation compensation values for pixels corresponding to each offset angle. According to a difference value between the angle and a preset angle, the processing module finds out the appropriate rotation compensation values in the rotation compensation data table for rotating and correcting the image. A calibrated image is then generated, and the calibrated image matches the image captured by the image capturing device at the preset angle.

Abstract: An electronic apparatus and an image capturing apparatus are provided. The image capturing apparatus comprises an image capturing module and a processing module. The image capturing module captures an image having a plurality of pixels. The processing module looks up a table to process a rotation calibration or a tilt calibration toward the pixels to output a calibrated image.

Abstract: A method for capturing a three dimensional (3D) image by using a single-lens camera is provided. First, a first image is captured. According to a focus distance of the single-lens camera in capturing the first image and an average distance between two human eyes, an overlap width between the first image and a second image required for capturing the second image of the 3D image is calculated. Then, the first image and a real-time image captured by the single-lens camera are displayed, and an overlap area is marked on the first image according to the calculated overlap width. A horizontal shift of the single-lens camera is adjusted, to locate the real-time image in the overlap area. Finally, the real-time image is captured as the second image, and the first and second images are output as the 3D image.

Abstract: A method for assist in focal length detection is adapted to a digital camera having a flash. The method includes the following steps. First, the flash of the digital camera is actuated and an image having a face portion is captured. Afterwards, an exposure feature value of the face portion in the image is calculated. A focus range comparison table is looked up according to the exposure feature value to obtain an initial focus position. Then, a focus procedure is performed according to the initial focus position to obtain a target focal length. After the target focal length is obtained, a flash feature value of the image is further calculated, and a guide number (GN) and a diaphragm value are set according to the flash feature value.

Abstract: An adjusting method of flash intensity is applied in an image capture apparatus with a flash lamp, where two pre-flash images corresponding the object are retrieved under two different pre-flash lights, respectively, and then a flash intensity of main-flash light is calculated according to one of the retrieved pre-flash images, so as to retrieve a main-flash image corresponding the object under the main-flash light with the calculated main-flash light.

Abstract: An image processing method, applicable to a digital image device, includes the following steps. At least one original image of different brightness ranges is captured, and more images of different brightness ranges are generated from the original image by using an image post-processing technique. Based on characteristics of the image of each brightness range, the weights of the image of each brightness range are defined. Then, hierarchical fusion is performed on the images of the different brightness ranges according to weight relations, so as to form a high-dynamic-range image capable of presenting features of each brightness range.

Abstract: A method generates a super resolution (SR) image by the steps of receiving a plurality of images corresponding to the same shot target; selecting one of the images as a basic image, and using the images except the basic image as a plurality of reference images; processing the reference images by using a geometric coordinate correction procedure according to the basic image, so as to generate a plurality of corrected images respectively corresponding to the reference images; and performing a resolution enhancement procedure on the basic image and the corrected images, so as to generate the SR image.