Abstract: There is provided a data processing device that includes an obtaining unit that obtains a first image data set, a second image data set generated by reading an image formed using the first image data set, and a property data set indicating the properties of a recording medium on which the image is to be reproduced. The data processing device also includes a specifying unit that determines a threshold for a density difference between the first image data set and the second image data set, wherein the threshold depends on the property data set. The specifying unit also determines an error area where the density difference between images expressed by the first and second image data sets is equal to or greater than the threshold.

Abstract: A collapsible lens barrel having a low-profile size and a camera applied with the collapsible lens barrel. The lens barrel includes a first retractable lens-retaining frame and a second retractable lens-retaining frame for retaining at least one of a plurality of lens groups and being retracted to a position outer than an inner radius of a movable lens cone in the collapsed state, respectively; and a first retractable lens-moving member and a second retractable lens-moving member. At least one of the first and second retractable lens-retaining frames is retained movable relative to the respective retractable lens-moving member along an optical axis direction in the collapsed state.

Abstract: A light shielding piece is supported by a second lens holding frame such that the light shielding piece can rotate and move on a plane which is perpendicular to an optical axis. In a shooting state, a through hole formed in the second lens holding frame is closed to establish a light shielding state. In a retracted state, on the other hand, a first auxiliary shaft passing through a through hole of the second lens holding frame pushes the light shielding piece to generate a component force. The generated component force rotates and moves the light shielding piece on a plane which is perpendicular to the optical axis, and the lens barrel is brought into an opened state where the through hole is not blocked.

Abstract: A collapsible lens barrel having a low-profile size and a camera applied with the collapsible lens barrel. The lens barrel includes a first retractable lens-retaining frame and a second retractable lens-retaining frame for retaining at least one of a plurality of lens groups and being retracted to a position outer than an inner radius of a movable lens cone in the collapsed state, respectively; and a first retractable lens-moving member and a second retractable lens-moving member. At least one of the first and second retractable lens-retaining frames is retained movable relative to the respective retractable lens-moving member along an optical axis direction in the collapsed state.

Abstract: There is provided a data processing device comprising: an obtaining unit that obtains a first image data set, a second image data set, and a property data set, the second image data set being generated by reading an image which is formed on a recording medium in accordance with the first image data set by an image forming device, and the property data set indicating a property of the recording medium; and a specifying unit that determines a threshold for a density difference between the first image data set and the second image data set, depending on the property data set, and specifies, as an error area, an area where the density difference between images expressed by the first and second image data sets is equal to or greater than the threshold.

Abstract: A digital camera and a mobile information terminal apparatus including a lens barrel including a first lens group and a second lens group disposed on an optical axis and configured to be related to operations concerned with changing overall relative magnification, a third lens group disposed on the optical axis and configured to be related to operations concerned with changing overall relative magnification and to be retracted from the optical axis in a collapsed state, a first driving device configured to drive the first lens group and the second lens group, a second driving device configured to drive the third lens group, a CCD disposed on the optical axis and configured to photograph a subject, a distance determining device configured to determine a distance to the subject, and a floating control device configured to drive at least one of the first driving device and the second driving device based on distance information obtained from the distance determining device to change an interval between the first

Abstract: An optical system apparatus having a lens barrel, including multiple lenses, that is shifted between a stored position in which the lenses are collapsed and a photographing position in which the lenses are aligned along an optical axis of the apparatus. A lens barrier covers at least a front side of a lens. A barrier driving unit moves the lens barrier between a closed position and an opened position for retracting the lens barrier out of an operation space of the lens barrel. A barrier control member prevents the lens barrier from moving to the closed position from the opened position when the lens barrel is in the photographing position.

Abstract: A light shielding piece is supported by a second lens holding frame such that the light shielding piece can rotate and move on a plane which is perpendicular to an optical axis. In a shooting state, a through hole formed in the second lens holding frame is closed to establish a light shielding state. In a retracted state, on the other hand, a first auxiliary shaft passing through a through hole of the second lens holding frame pushes the light shielding piece to generate a component force. The generated component force rotates and moves the light shielding piece on a plane which is perpendicular to the optical axis, and the lens barrel is brought into an opened state where the through hole is not blocked.

Abstract: A digital camera and a mobile information terminal apparatus including a lens barrel which includes a first lens group (11) and a second lens group (12) disposed on an optical axis and configured to be relative to operations on changing magnification, a third lens group (13) disposed on the optical axis and configured to be related to operations on changing magnification and to be retracted from the optical axis in a collapsed state, a first driving device configured to drive the first lens group (11) and the second lens group (12), a second driving device configured to drive the third lens group (13), a CCD (16) disposed on the optical axis and configured for photographing a subject, a distance determining device configured to determine a distance to the subject, and a floating control device configured to drive at least one of the first driving device and the second driving device based on distance information obtained from the distance determining device to change an interval between the first lens group (

Abstract: An optical system apparatus having a lens barrel, including multiple lenses, that is shifted between a stored position in which the lenses are collapsed and a photographing position in which the lenses are aligned along an optical axis of the apparatus. A lens barrier covers at least a front side of a lens. A barrier driving unit moves the lens barrier between a closed position and an opened position for retracting the lens barrier out of an operation space of the lens barrel. A barrier control member prevents the lens barrier from moving to the closed position from the opened position when the lens barrel is in the photographing position.