摘要:
A compact color image reader for scanning an image in a short time is disclosed. The color image reader includes three fluorescent lamps 17 of red, green, and blue, a lighting circuit 15 for lighting the three fluorescent lamps sequentially, a CCD 183 for reading an image illuminated by the three fluorescent lamps and a control circuit 16 for controlling a lighting period of each of the fluorescent lamps 17 and the reading of the CCD. In order to perform the scanning of a color image in a short time, the lighting circuit 15 lights each of the three fluorescent lamps at a lamp current higher than a rated value and the CCD performs the fast reading in a period corresponding to the lighting period.
摘要:
A reader having a high-resolution mode and a high-speed mode is disclosed. The reader comprises a CCD sensor, a buffer, a first AD convertor, a second AD convertor, a data selector and a control circuit. The input of the buffer is connected to the CCD sensor through a capacitor and a 5 V power source through an analog switch, and an output of the buffer is connected to the first AD convertor for the high-resolution mode and the second AD convertor for the high-speed mode in parallel. The data selector for selecting an output from the first AD convertor or the second AD convertor and sending it out to the control circuit is connected to the outputs of the first AD convertor and the second AD convertor.
摘要:
An image scanning device has a light source for emitting a beam, a CCD circuit board having a CCD sensor, an optical unit for guiding the emitted beam from the light source to the CCD sensor, a CCD sensor driving circuit connected with the CCD circuit board with a signal cable, a clock generating circuit for generating a clock to be transferred to the CCD sensor, a reset pulse generating circuit for generating a reset pulse for resetting an output buffer of the CCD sensor, a clamp circuit for clamping an output of the CCD sensor, and an analog-to-digital converter for converting an analog signal into a digital signal. The clock generating circuit is disposed on the CCD circuit board.
摘要:
A read-out apparatus for a solid state imaging device having a plurality of photoelectric converter elements which convert image into photoelectric charges and store the photoelectric charges, respectively. The apparatus includes a shift register for shifting charges, transferred from the photoelectric converter elements, in sequence to output image signals which correspond to the photoelectric converter elements, respectively, a gate for transferring the charge stored in the respective photoelectric converter elements to the shift register each time a transfer signal is applied thereto, and a transfer signal generation unit for generating the transfer signal when an image signal corresponding to a predetermined one of the photoelectric converter elements is outputted so that charges in the shift register transferred from the photoelectric converter elements are partially overlapped with charges transferred in previous transfer operation.
摘要:
In view of the memory or storage disadvantage inherent in conventional picture data memory systems, a picture data memory system provides a system with simplified memory control which equalizes the amounts of the color and black/white picture element data by reducing the resolution of the color picture element data (a picture element representing an area scanned by at least one CCD element) to one-quarter of the resolution of black/white picture element data. The picture data memory system constitutes memory locations having a bit size in accordance with the resolution of the color picture when reproduced by the color printer. By doing so, the numbers of bits are equal for the picture element data of both the color and black/white pictures, thereby allowing the storing of color and black/white picture element data in the memory that has a storage capacity that is no greater than a memory storing only black/white picture data. This system includes picture memory for storing binary data representing both color gradation data and black/white concentration data of each picture element; a controller for producing either a color or a black/white mode select signal; a scanner for producing either color gradation data or black/white concentration data; a first buffer memory for storing color gradation data; a second buffer memory for storing black/white concentration data; and a selector for selecting data from either the first or the second buffer memory to be written into a specific address of the picture memory means. The number of bits representing color gradation data or black/white concentration data written into each address of the picture memory are set to be equal to each other.
摘要:
A system for lighting fluorescent lamps, includes a plurality of fluorescent lamps, a transformer for generating filament voltage and a starting voltage for the fluorescent lamps, a switching circuit for sequentially and periodically opening and closing a plurality of its contacts and a driving circuit for electrically biasing the transformer and the switching circuit. A starting voltage is sequentially applied to the fluorescent lamps which are each independently connected to one of the contacts so that the fluorescent lamps may be sequentially turned on.
摘要:
A color image reading and recording apparatus comprises three light source corresponding to blue, green and red colors disposed at one side opposite to the side of the original to be read. A CCD image sensor is used to obtain signals corresponding to the blue, green and red components of the original through the sequential lighting up and driving of the three light sources. The CCD image sensor receives light reflected from the original. A memory device is used to store color component signals corresponding to the blue, green and red components. A color converter then converts the color component signals into yellow, magenta, cyan and black. The apparatus further records the colors converted by the color converter onto a recording paper by controlling the recording of the yellow, magenta, cyan and black color images onto the same recording paper. Also, the apparatus records the single color images obtained by combination of specified color component signals stored in the memory device onto individual recording papers.
摘要:
An image reading apparatus for reading a transparent film has a light source, an exchangeable adjusting board corresponding to the transmission factor of the film, an imaging device for receiving and imaging the light passing through the adjusting board and the film, a comparison function for detecting the output of the imaging device and comparing the output of the imaging device with a predetermined output level, a control device for outputting power source control signals in response to the output of the comparison device, and a power source for energizing the light source in response to the power source control signals. Whereby, the adjusting board is imaged before the film is imaged by the imaging device, and in case the light amount of the light source is not adequate for the film, the extent of energizing the light source is adjusted for adequately imaging the film.
摘要:
A method of enlarging or reducing an image at a desired magnification in an image reading and/or recording apparatus. The feature of the present invention resides in first deciding the integral part a and the decimal part d of a value A corresponding to the desired magnification Z, then forming a single readout pixel by averaging a pieces of basic pixels read out from an original, and subsequently using the decimal part d as a correction value for each readout pixel and deleting one basic readout pixel every time the value of the decimal part accumulated with respect to the individual readout pixels exceeds 1, thereby continuously varying the ratio of the reading resolution to the recording density to execute enlargement or reduction of the image at the desired magnification.
摘要:
A thermal recording apparatus including a thermal head provided with a plurality of heating elements each having a predetermined value of resolution in a feed direction of a recording paper sheet, and a printer control circuit having first and second feed control members for feeding, at the time of recording scanning of each line of the recording paper sheet, the recording paper sheet through an interval of a half of the predetermined value and an interval of the predetermined value multiplied by a natural number, respectively such that feed of the recording paper sheet is controlled by the first and second feed control members at the time of recording of hues of yellow, magenta and cyan and a hue of black, respectively.