摘要:
An image-pickup apparatus includes a first detector configured to generate first information corresponding to a contrast state of a picked-up image, a second detector configured to detect second information that is used for focus control and different from the first information, a controller configured to provide the focus control, and a first operating member operable by a user, wherein the controller provides the focus control that uses the first information but does not use the second information when the first operating member is not operated, and provides the focus control that uses at least the second information when the operating member is operated.
摘要:
An apparatus, such as a focus adjusting apparatus, includes a focus adjusting system, a driving device which drives the focus adjusting system from one of a state in which a near-distance object is in focus and a state in which a far-distance object is in focus to the other, and a control device which repeatedly performs determination of a focusing state of the focus adjusting system while causing the driving device to drive the focus adjusting system, and, if the focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, restrains the focus adjusting system from being driven in the one direction, so that a focus adjusting operation can be appropriately performed.
摘要:
An image projector comprises a discharge lamp, image projecting means for displaying an image on a screen by emitting light from the discharge lamp, electric power regulating means for regulating the electric power supplied to the discharge lamp, a cooling fan for reducing the temperature of the discharge lamp or the image projecting means, a cooling fan controlling means for controlling the rotation of the cooling fan, and a sensor for detecting a temperature of the discharge lamp or the image projecting means, wherein the rotation of the cooling fan is stopped when the image projector is in a standby mode. In the standby mode, the cooling fan controlling means controls the rotation speed of the cooling fan based on the detected temperature.
摘要:
An apparatus, such as a focus adjusting apparatus, includes a focus adjusting system, a driving device which drives the focus adjusting system from one of a state in which a near-distance object is in focus and a state in which a far-distance object is in focus to the other, and a control device which repeatedly performs determination of a focusing state of the focus adjusting system while causing the driving device to drive the focus adjusting system, and, if the focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, restrains the focus adjusting system from being driven in the one direction, so that a focus adjusting operation can be appropriately performed.
摘要:
A correction variable is calculated based on vibration data of an image sensing apparatus. Based on the calculation result, timing of reading image signals from an image sensing device is controlled. The read image signals are delayed by predetermined time, the read image signals and the delayed image signals are added at a predetermined addition ratio based on the calculation result of the correction variable calculator. In still image sensing, the above addition operation is not performed.
摘要:
An image pickup apparatus includes a filter for extracting, from a video signal, a high-frequency component which varies with a state of focusing, and a control part arranged to control a cutoff frequency of the filter according to a luminance level in the video signal.
摘要:
An image pickup apparatus is arranged to vary the size of a focus detecting area and/or a light measuring area when the aspect ratio of an image plane is changed, so as to optimize the focus detecting area and/or the light measuring area with respect to the image plane.
摘要:
An automatic focus adjusting device is provided with an AF evaluation value detecting circuit for detecting an AF evaluation value indicative of a focusing state of a lens, a lens driving part for moving the lens in an optical axis direction, a control circuit for controlling the lens driving part on the basis of the AF evaluation value detected by the AF evaluation value detecting circuit in such a way as to cause the lens to move back and forth by a predetermined amount of movement at a time until the AF evaluation value becomes a maximum value, an inversion detecting circuit for detecting inversion of a direction of movement of the lens, and an altering circuit for altering the predetermined amount of movement of the lens in response to detection of the inversion by the inversion detecting circuit.