Abstract This disclosure relates to an image reproduction apparatus for reproducing images through laser beam scanning using galvano mirrors. The apparatus includes a memory device which stores an image signal in an image signal memory in accordance with a grid clock signal; a reading/processing/writing device which reads the image signal from the image signal memory, performs image processing, and writes the processed image signal into a processed image signal memory in accordance with the clock signal from another clock generator; and a reading device which reads the processed image signal from the processed image signal memory in accordance with the grid clock signal. The image signal picked up through the scanning of the laser beam is deflected by the galvano mirrors and is first amplified and processed as needed, and then it is converted to the digital signal by an A/D converter, and the digital signal is stored in the image signal memory device in accordance with the grid clock signal. Next, in accordance with the clock signal from a different, more stable clock generator, such as a crystal oscillator, the image signal read from the image signal enhancement memory undergoes tone correction, image enhancement, making halftone, enlargement, reduction, or any other necessary image processing, and then the processed signal is stored in a processed image signal memory device. Next, the image reproduction device reads the processed image signal from the processed image signal memory and outputs it.
Image reproduction apparatus which reproduces images through laser beam scanning using scanning mirrors, comprising means for scanning an original and producing an image signal, first clock means for producing a first clock signal which includes a series of pulses at equal scanning pitches, memory means connected to receive said images signal and said first clocks signal and said image signal in an image signal memory in accordance with said first clock signal, second clock means for producing a second clock signal, processed image signal memory means, a reading and/or processing and/or writing device connected to receive said second clock signal and connected to said image signal memory and functions to read said image signal from said image signal memory, perform image processing, and write the processed image signal into said processed image signal memory means, and means connected to said first clock means and to said processed image signal memory means for reading and/or recording, and/or reproducing said processed image signal from said processed image signal memory means in accordance with said first clock signal.
Claim 2
Dependent Claim
175 words
Image reproduction apparatus which reproduces images through laser beam scanning using scanning mirrors, comprising means for scanning an original and producing an image signal, first clock means for producing a first clock signal which includes a series of pulses at equal scanning pitches, memory means connected to receive said images signal and said first clocks signal and said image signal in an image signal memory in accordance with said first clock signal, second clock means for producing a second clock signal, processed image signal memory means, a reading and/or processing and/or writing device connected to receive said second clock signal and connected to said image signal memory and functions to read said image signal from said image signal memory, perform image processing, and write the processed image signal into said processed image signal memory means, and means connected to said first clock means and to said processed image signal memory means for reading and/or recording, and/or reproducing said processed image signal from said processed image signal memory means in accordance with said first clock signal.
Claim 3
Dependent Claim
28 words
Apparatus in claim 1, wherein said memory means, said reading and/or processing and/or writing device, and said reading means are each capable of performing their respective functions non-continuously.