311 TRANSISTOR CD DISC ILLUMINATI SERIES

Japanese Patent Application Laid-Open No. 2003-125344 discloses an imaging device that shoots a high-resolution image (an image having a quality enough for viewing as a still image) during moving image shooting, and a method of processing the shot image. Two signals from the pair of photodiodes are used as separate pieces of image data so that the two images can be shot at the same time.ДЇurther, Japanese Patent Application Laid-Open No. 2014-048459, the light-receiving efficiency of one of the pair of photodiodes is high and the light-receiving efficiency of the other photodiode is low.

In the imaging device described in Japanese Patent Application Laid-Open No. 2014-048459 discloses an imaging device including a pair of photodiodes having the shape of pupils asymmetric with respect to each pixel. Even in this case, it is desired that similar levels of signal charge should be obtained in an imaging element while shooting two images in different accumulation time settings to obtain noiseless images having excellent S/N ratios. Shooting two images at the same time through a single photographic lens, such as a moving image and a still image, or a moving image at a normal frame rate and a moving image at a high frame rate, means that the aperture values used to shooting these images are the same. Therefore, for example, when the frame rate is 120 fps, a short accumulation time such as 1/125 second or 1/250 second is inevitably set. Further, in the case of a moving image at a high frame rate, one frame period is short. On the other hand, since a still image is required to have the sharpness of shooting a moment, there is a need to set a short accumulation time, for example, about 1/1000 second, in order to obtain a stop motion effect. Particularly, in such a situation that the attitude of a camera is instable such as a helicopter shot, this setting is important. In other words, if the frame rate is 30 fps, a relatively longer accumulation time, such as 1/30 second or 1/60 second, will be adequate.

311 TRANSISTOR CD DISC ILLUMINATI SERIES

In order to suppress the jerkiness, there is a need to set an accumulation time close to one frame period in a series of shooting processes. In the meantime, when a phenomenon, so-called jerkiness, like a kind of frame-by-frame advance happens to a moving image played back, it is common that the quality of the moving image is largely degraded. This can give a viewer an uplifting feeling. Further, if a moving image at a normal frame rate and a moving image at a high frame rate can be shot at the same time with one camera, a specific scene can be switched to a slow-motion moving image to enjoy the image as a high-definition moving image. This can significantly enhance the values of shot images. If a moving image and a still image can be shot at the same time with one camera, not only can a shooting scene be viewed as a moving image, but also a decisive scene in the moving image can be seen as a still image for fun. The present invention relates to an imaging device having an image playback function, and a playback device.

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