Abstract:
A method and an apparatus for correcting distortions of image-taking video signals are provided. The method and an apparatus adopting the method are capable of reducing distortion generated in a taken image by correction of inter-frame and intra-frame hand movements in an image-taking apparatus employing an image-taking device of an X-Y address type. To be more specific, this method is capable of correcting distortion observed in a taken image as distortion caused by a positional change, which occurs in the horizontal and/or vertical directions of the taken image at a photographing time as a positional change of the image-taking device. In accordance with the method, in a frame period of a taken image, an inter-frame correction quantity for a positional change of the device is detected and, on the basis of the detected inter-frame correction quantity, the positional change is corrected to eliminate a displacement observed when the frame changes to the next one as a displacement of the taken image. An intra-frame correction quantity for a positional change of the image-taking device is computed for each of many locations on the screen of the taken image and, on the basis of the computed intra-frame correction quantity, distortions caused by positional changes on the screen of the taken image as distortions of the taken image are corrected.
Abstract:
An image pickup apparatus having an image capturing unit capturing an image, a first recording unit temporarily recording an original image signal output from the image capturing unit, a processing unit performing predetermined signal processing upon the original image signal output from the image capturing unit, and an instructing unit instructing the processing unit to capture a still image. When the processing unit is instructed to capture a still image by the instructing unit while performing moving image signal processing upon the original image signal output from the image capturing unit, the processing unit may cause the first recording unit to record the original image signal output from the image capturing unit. In addition, the processing unit may read out the recorded original image signal from the first recording unit and perform still image signal processing upon the read out original image signal while suspending the moving image signal processing.
Abstract:
An image obtained as a result of an image-taking process carried out at a screen rate higher than a standard screen rate is stored in a recording medium in the contemporary video format. To put it more concretely, the image obtained as a result of an image-taking process is supplied at a first screen rate to first compression/coding means for carrying out a compression/coding process at the first screen rate and image data obtained as a result of the compression/coding process is temporarily stored in temporary storage means. After image data output by the first compression/coding means during a predetermined period of time is stored in the temporary storage means, decompression/decoding means reads out the image data from the temporary storage means at a second screen rate lower than the first screen rate, carries out a decompression/decoding process on the image data and stores a result of the decompression/decoding process in recording means.
Abstract:
A method and an apparatus for correcting distortions of image-taking video signals are provided. The method and an apparatus adopting the method are capable of reducing distortion generated in a taken image by correction of inter-frame and intra-frame hand movements in an image-taking apparatus employing an image-taking device of an X-Y address type. To be more specific, this method is capable of correcting distortion observed in a taken image as distortion caused by a positional change, which occurs in the horizontal and/or vertical directions of the taken image at a photographing time as a positional change of the image-taking device. In accordance with the method, in a frame period of a taken image, an inter-frame correction quantity for a positional change of the device is detected and, on the basis of the detected inter-frame correction quantity, the positional change is corrected to eliminate a displacement observed when the frame changes to the next one as a displacement of the taken image. An intra-frame correction quantity for a positional change of the image-taking device is computed for each of many locations on the screen of the taken image and, on the basis of the computed intra-frame correction quantity, distortions caused by positional changes on the screen of the taken image as distortions of the taken image are corrected.
Abstract:
An image pickup apparatus having an image capturing unit capturing an image, a first recording unit temporarily recording an original image signal output from the image capturing unit, a processing unit performing predetermined signal processing upon the original image signal output from the image capturing unit, and an instructing unit instructing the processing unit to capture a still image. When the processing unit is instructed to capture a still image by the instructing unit while performing moving image signal processing upon the original image signal output from the image capturing unit, the processing unit may cause the first recording unit to record the original image signal output from the image capturing unit. In addition, the processing unit may read out the recorded original image signal from the first recording unit and perform still image signal processing upon the read out original image signal while suspending the moving image signal processing.
Abstract:
A method and an apparatus for correcting distortion of image-taking video signals are provided. The method and an apparatus adopting the method are capable of reducing distortion generated in a taken picture by a focal plane phenomenon caused by a hand movement or the like in an image-taking apparatus employing an image-taking device of an X-Y address type. To be more specific, this method is capable of correcting distortion observed in a taken image as distortion caused by a positional change, which occurs in the horizontal and/or vertical directions of the taken image at a photographing time as a positional change of the image-taking device. In accordance with the method, one screen segment of the taken image is divided into a plurality of image sub-segments. For each of the image sub-segments, the rate of the positional change of the image-taking device is detected. Then, in each of the image sub-segments, the distortion caused by the positional change of the image-taking device in the taken image is corrected on the basis of the rate detected for each of the image sub-segments as the rate of the positional change of the image-taking device.
Abstract:
A method and an apparatus for correcting distortions of image-taking video signals and an apparatus for correcting distortions are provided. The apparatus and method thereof are capable of reducing distortion generated in a taken image caused by a hand movement and by a characteristic of an image-taking lens in an image-taking apparatus employing an image-taking device of an X-Y address type. The apparatus has a lens-distortion correction quantity generation section to generate a first correction quantity set in advance as a correction quantity to be used for correcting a distortion caused by the image-taking lens characteristic as a distortion of a taken image at a pixel position on the device on the basis of information on the pixel position. The screen segment of the taken image is divided into many image sub-segments. For each of the image sub-segments, the positional change rate of the device is detected. In each of the image sub-segments, a second correction quantity is then computed on the basis of the rate detected for each of the image sub-segments as the rate of the positional change of the device. Finally, the distortion is corrected on the basis of a sum of the first (generated by the lens-distortion correction quantity generation section as a correction quantity for a member subjected to a process to correct the distortion) and second correction quantity.
Abstract:
A method and an apparatus for correcting distortions of image-taking video signals and an apparatus for correcting distortions are provided. The apparatus and method thereof are capable of reducing distortion generated in a taken image caused by a hand movement and by a characteristic of an image-taking lens in an image-taking apparatus employing an image-taking device of an X-Y address type. The apparatus has a lens-distortion correction quantity generation section to generate a first correction quantity set in advance as a correction quantity to be used for correcting a distortion, caused by the image-taking lens characteristic, of a taken image at a pixel position on the device on the basis of information on the pixel position. The screen segment of the taken image is divided into many image sub-segments. For each of the image sub-segments, the positional change rate of the device is detected. In each of the image sub-segments, a second correction quantity is then computed on the basis of the rate of the positional change of the device detected for each of the image sub-segments. Finally, the distortion is corrected on the basis of a sum of the first (generated by the lens-distortion correction quantity generation section as a correction quantity for a member subjected to a process to correct the distortion) and second correction quantity.
Abstract:
An image display apparatus having an electronic zoom function. The apparatus includes: imaging means capable of changing a start position of reading an image; in order for at least a part of a predetermined range of the image data to be written at the time of reading the image from a memory, writing means for extracting the predetermined range of the image and writing the extracted image in the memory; reading means for starting to read the image in the memory at the time of reading the image, converting the predetermined range of the image read from the memory into an image of a predetermined resolution, and outputting the image; and when the range of the image read is wider than a range to be expanded, control means for controlling the start position of reading so as to narrow the range of the image to be read.
Abstract:
An image display apparatus having an electronic zoom function. The apparatus includes: imaging means capable of changing a start position of reading an image; in order for at least a part of a predetermined range of the image data to be written at the time of reading the image from a memory, writing means for extracting the predetermined range of the image and writing the extracted image in the memory; reading means for starting to read the image in the memory at the time of reading the image, converting the predetermined range of the image read from the memory into an image of a predetermined resolution, and outputting the image; and when the range of the image read is wider than a range to be expanded, control means for controlling the start position of reading so as to narrow the range of the image to be read.