Abstract: In converting image sensing data into image data, a plurality of image sensing data meeting a predetermined condition are processed as a group of image sensing data. An image reproduction parameter is obtained from this image sensing data group, and each image sensing data of the image sensing data group is converted into image data by using the image reproduction parameter. Accordingly, an image reproduction parameter for obtaining an optimum reproduced image can be accurately set from the image sensing data group. Also, since a reproduction luminance level (range) is determined from the image sensing data group, the correlation between the luminances of image planes is not lost. This allows an easy comparison of reproduced images and prevents the boundaries of luminances from becoming unnatural when the reproduced images are synthesized.

Abstract: An image processing apparatus is constructed by a setting circuit for manually setting a first color processing parameter, a first color processing circuit for performing a first color process by using the first color processing parameter, a storing circuit for storing a second color processing parameter set in correspondence to the first color processing parameter as a reference value, and a second color processing circuit for performing a second color process different from the first color process by using the second color processing parameter, wherein in case of making the second color processing circuit function, the first color processing parameter is set to the reference value.

Abstract: Method and apparatus for forming halftone images which enables image recording on a process film without reducing the size of the recording area beyond that which is necessary. The method and apparatus is preferred particularly in the preparation of a master printing plate such as a printing plate which includes a photosensitive member having an organic silver salt. According to the method and apparatus, an image recording apparatus propagates error data when there exists a restriction on the minimum recording size and thereby preserves halftone concentration and reproduces intermediate gradation of darkness with stability.

Abstract: A scanning optical apparatus comprises a light source unit, scanning means for deflecting a beam from said light source unit and scanning a scanning surface with the beam, means for detecting the beam scanned on said scanning surface and control means for controlling the beam scanned on said scanning surface in a direction perpendicular to said scanning surface on the basis of a magnitude and a change as a function of time of a signal output from said detecting means.

Abstract: A scanning optical device for scanning a material to be scanned with a beam emitted from a light source thereof, has a storage device for storing information relating to the quantity of deviation of a scanning optical system. The convergent position of the beams is adjustable in the direction of the optical axis by at least partially controlling the elements of the scanning optical system in accordance with information relating the quantity of deviation supplied by the storage device. The quantity of deviation such as curvature of field of the scanning optical system can be compensated by a simple structure. Therefore, a recording device or reading device employing the scanning optical system exhibiting high resolution, low cost and a capability of preventing deterioration in the gradation expression can be realized.

Abstract: A scan optical apparatus is provided with a first light source for generating a beam for scan optically modulated based on an image signal, a second light source for generating a beam for jitter amount detection, a scanning device for deflecting the beams from the first light source and from the second light source to scan a surface to be scanned, an optical member disposed in the vicinity of the surface to be scanned or at a position substantially optically equivalent to the surface to be scanned, and a detecting device for detecting a beam reflected by the optical member and deflected by the scanning device. The optical member may have reflective portions and nonreflective portions which are repeatedly arranged in a main scan direction, or may be a corner cube array in which a plurality of corner cubes are arranged in the main scan direction. Further, the surface to be scanned may be a recording medium in a recording apparatus.

Abstract: A scanning optical apparatus is provided with a light source, a scanning device and a detector. A light beam generated from the light source is deflected by the scanning device to be scanned on a surface to be scanned. The light beam scanning on the surface to be scanned is detected by the detector. The detector is constructed such that three or more photosensors are closely arranged adjacent one another in the scanning direction. At least one of the photosensors is a division sensor which is arranged symmetrically with respect to the scanning direction.

Abstract: An image forming apparatus using dry silver salt material includes a photosensitive member having a base material and reducing material, photosensitive silver halide and organic silver salt which are on the base material; optical system for projecting information light onto the photosensitive member; auxiliary exposure optical system for uniformly exposing an entire surface of the photosensitive member; and a heating for uniformly heating the photosensitive member.