Abstract: An image reading device includes a document tray, a linear conveyance path, a curved conveyance path, a document conveyance device, a scanning device, a length detecting device, an operation device, and a controller. A plurality of conveyance rollers are disposed at a predetermined first interval in the linear conveyance path. In the curved conveyance path, a plurality of conveyance rollers are disposed at a predetermined second interval longer than the first interval. When accepting through the operation device an instruction for conveying an original document through the curved conveyance path, the controller allows conveyance of the original document through the curved conveyance path when a length of the original document detected by the length detecting device is not shorter than the second interval or disallows conveyance of the original document through the curved conveyance path when the detected length of the original document is shorter than the second interval.

Abstract: An electrostatic image developer includes: a toner A to which silica particles (A) containing an elemental nitrogen-containing compound containing elemental molybdenum are externally added; and a carrier B including a core material and a coating resin layer that covers the core material and contains inorganic particles. In the silica particles (A), the ratio NMo/NSi of a Net intensity NMo of elemental molybdenum that is measured by X-ray fluorescence analysis to a Net intensity NSi of elemental silicon that is measured by the X-ray fluorescence analysis is from 0.035 to 0.45 inclusive.

Abstract: It is an object to reduce an amount of calculation for motion vector detection and to prevent degradation in image quality. A motion vector detection device (1) includes a first motion vector extraction circuit (142) to extract a predetermined reduced number of first motion vectors from multiple first motion vectors detected by a first motion vector detection circuit (141), and a selection circuit (143) to select the multiple first motion vectors or the extracted first motion vectors.

Abstract: It is an object to reduce an amount of calculation for motion vector detection and to prevent degradation in image quality. A motion vector detection device (1) includes a first motion vector extraction circuit (142) to extract a predetermined reduced number of first motion vectors from multiple first motion vectors detected by a first motion vector detection circuit (141), and a selection circuit (143) to select the multiple first motion vectors or the extracted first motion vectors.