Nippon Kogaku K.k.

Kyodo News Service

Nikon Corporation

Masaki Isogai

Atsushi Kawahara

Norihiko Takatsu

Makoto Kimura

Kenji Toyoda

Tadashi Ohta

Ryuzo Motoori

Tadashi Ota

Yukio Nakagawa

Koichiro Kawamura

Toshihisa Kuroiwa

Akimasa Sato

A digital video signal processing apparatus comprising a reproducer, an adder and a signal processor. The reproducer reproduces an analog signal of a still image recorded on a disk-shaped recording medium and converts it into a digital signal. The adder adds at least a predetermined number of digital signals for the same image from the reproducer, and then outputs an added digital video signal. The signal processor accomplishes digital video signal processing of the digital video signal derived from the adder.

Digital video signal processing apparatus

According to the phototelegraphic transmission apparatus of the present invention, the image on developed films can be directly transmitted without any prints of the film. In order to reproduce high-quality image, the apparatus comprises two gradation correction means, one of which is so designed that one of three operation modes may be selected.

Phototelegraphic transmission apparatus

An apparatus for electrically transmitting the image of a pattern corresponding to the light transmission characteristic of a light-transmitting film substrate employs a linear image sensor for scanning the image of the pattern and producing a corresponding output signal, the frequency band of which is adjusted for transmission over a telephone circuit. The output signal can be made independent of magnification changes of the image-forming optical system, and the area of the pattern scanned by the linear image sensor can be set selectively. A second optical system is employed for observation and includes a retractable mirror that starts the production of the output signal when the mirror is retracted. Both a film image and data on an accompanying document can be transmitted.

Phototelegraphic apparatus for transmitting images of film and data

An image signal generating apparatus includes an optical system for focusing the image of a photographic film onto a predetermined plane and a scanning device for scanning the image with a photoreceptor positioned at the predetermined plane and generating output signals representing the light intensity distribution of the film. The scanning device performs a first scan of the image and a second scan of the image upon completion of the first scan. During the first scan the levels of the output signals indicative of the maximum density and the minimum density of the film are detected, and during the second scan the exposure of the photoreceptor is controlled in accordance with the detected levels. Also, during the second scan, the output signals are clamped to a clamp level calculated in accordance with the detected maximum density level and the minimum level of the output signals during the first scan.

Image scanning signal generating apparatus with pre-scan for exposure

An image scanning apparatus for making picture signals has an optical system for forming an image of an object on a predetermined plane and means for scanning the object image by a light-receiving surface disposed on the predetermined plane and generating an output indicative of the light intensity distribution of the object image on the plane. The apparatus comprising first driving means for moving the scanning means relative to the object image, second driving means for moving the scanning means relative to the object image in response to the completion of movement of the scanning means by the first driving means, means for controlling the exposure of the light-receiving surface of the scanning means during the movement of the scanning means by the second driving means in accordance with the output of the scanning means generated during the movement thereof by the first driving means; and means for processing the output of the scanning means generated during the movement thereof by the second driving means into a picture signal corresponding to the object image in accordance with the output of the scanning means generated during the movement thereof by the first driving means.

Image-scanning apparatus

A still picture signal conversion apparatus converts a still picture signal reproduced in the form of an electric signal from a video tape or disk, still picture video camera or the like to a low-velocity narrow-band signal suited for use in a facsimile system utilizing the ordinary telephone circuit or a hard copying apparatus and performs the desired trimming operation on the signal when delivering the same. A selected portion of each horizontal scan line is taken out as a sampled digital picture signal and the number of the horizontal picture elements is compensated for by the method of sampling frequency adjustment or weighted interpolation. To effect the vertical trimming, the digital picture signal is stored temporarily every horizontal scan line in a plurality of memories so that portion of the signal to be retained by the trimming is selectively read out and the deficient number of scan lines is compensated for by the method of weighted interpolation.

Still picture signal conversion apparatus capable of trimming operation

There is disclosed a solid-state area imaging apparatus suitable for photographing a still picture. The apparatus comprises a plurality of vertical transfer electrodes and a pair of horizontal read CCDs, and the vertical transfer electrodes are vertically continuously arranged such that each electrode alternately crosses vertically adjoining two of a plurality of imaginary horizontal scanning lines thereby providing a plurality of photosensitive elements distributed in a checkered pattern on the imaging surface of the apparatus. This distribution of the photosensitive elements has the effect of applying the video signal to all the horizontal scanning lines. Thus, by using the existing integrated circuit technique, it is possible to realize a solid-state area imaging apparatus whose vertical resolution of reproduced still pictures is two times the vertical resolution obtained previously.

Solid-state area imaging apparatus

A solid-state area imaging device for electronic still picture cameras which is so designed that when a playbacked picture is viewed on a television receiver of the interlaced scanning type, its vertical resolution is improved up to about that of the ordinary broadcast received picture. In the solid-state area imaging device, the signal charges from a large number of photosensitive elements arranged into a two-dimensional array are transmitted to two horizontal transferring CCDs, whereby the odd field signal charges are taken from one of the horizontal transferring CCDs and the even field signal charges are taken from the other horizontal transferring CCD independently of each other.

Growing community of inventors

Tokyo, Japan

Masaki Isogai