Imgae processing system
AssigneeCanon Kabushiki Kaisha
InventorsYoshinobu Mita, Yoshihiro Ishida, Miyuki Enokida, Junichi Shishizuka
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Abstract
An image processing system for use in a copying machine or a facsimile machine includes an original-image reading device which allows an operator to check the state of a read image before the read image is printed out or transmitted. The original image read by a reading section is temporarily stored in a recording section. Image data on the stored image is accessed and displayed on a display screen at high speed under direct memory access control.
Claims50
An image processing system arranged to read an original image and produce an image output on a recording medium, comprising:
- reading means for color-sequentially reading out said original image as frame images for individual color components;
- memory means for storing individual frame image information representing the frame images read by said reading means;
- display means for displaying an image;
- display memory means for storing an image to be displayed on said display means;
- and
- direct memory access control means for transferring said individual frame image information from said memory means to said display means frame by frame in a manner of direct memory access,
- said display memory means superimposes a frame image newly transferred from said memory means on a frame image stored in said display memory means each time one frame image is transferred,
- wherein the storing operation of storing frame image information for a color component in said memory means and the access operation of making access to frame image information for another color component by said direct memory access control means are performed in parallel.
An image processing system arranged to read an original image and produce an image output on a display unit, comprising:
- reading means for sequentially reading out said original image as frame images for individual color components;
- memory means for storing image data;
- a first bus for connecting said reading means and said memory means;
- writing means for writing said frame images read by said reading means to said memory means in a frame-sequential manner over said first bus;
- display means for displaying an image;
- display memory means for storing an image to be displayed on said display means;
- and
- a second bus for connecting said display memory means and said memory means;
- a direct memory access control means provided at a position along said second bus, for transferring said frame image information from said memory means to said display memory means frame by frame in a manner of direct memory access, while said writing means is sequentially writing said read frame images to said memory means, wherein said display memory means superimposes a frame image newly transferred from said memory means on a frame image stored in said display memory means each time one frame image is transferred.
An image processing system having image communication means capable of transmitting image information to a destination apparatus, comprising:
- reading means for reading out an original image;
- memory means for storing image information read by said reading means;
- display means for displaying an image on a display screen;
- first control means arranged to alter the size of an image carried by said image information stored in said memory means according to the size of said original image and output said image of altered size to said display means;
- second control means for displaying a desired portion of a reference image at a desired magnification, said reference image being an image displayed under the control of said first control means;
- and
- transmitting means arranged to alter the size of the image carried by said image information stored in said memory means at said magnification controlled by said second control means and transmit said image information on said image of altered size to said destination apparatus.
An image processing system having image communication means capable of receiving image information from a destination apparatus, comprising:
- memory means for storing received image information;
- display means for displaying an image on a display screen;
- printing means for printing out said image information to a recording medium;
- first control means arranged to alter the size of an image carried by said image information stored in said memory means according to the size of said original image and output said image of altered size to said display means;
- second control means for displaying a desired portion of a reference image at a desired magnification, said reference image being an image displayed under the control of said first control means;
- and
- third control means arranged to alter the size of the image carried by said image information stored in said memory means at said magnification controlled by said second control means and produce a printout of said image of altered size by said printing means.
A control method for an image processing system arranged to read an original image and to produce an image output on a recording medium, said medium comprising the steps of:
- color-sequentially reading out the original image as frame images for individual color components;
- storing individual frame image information representing the frame images, read in said reading step, in a memory;
- transferring the individual frame image information from the memory to a display frame by frame, by direct memory access;
- synthesizing an image by superimposing a newly transferred frame image on a present displayed image;
- and
- updating the presently displayed image by the synthesized image each time one frame image is transferred and superimposed on the presently displayed image,
- wherein the storing operation of storing frame image information for a color component in the memory and the access operation of making access to frame image information for another color component by the direct memory access are performed in parallel.
A control method for an image processing system arranged to read an original image and to produce an image output on a display unit, said method comprising the steps of:
- sequentially reading out the original image as frame images for individual color components;
- writing the frame images read in said reading step to a memory in a frame-sequential manner over a first bus;
- transferring the frame images from the memory to the display frame by frame over a second bus by direct memory access, while said writing step is sequentially writing the read frame images to the memory;
- synthesizing an image by superimposing a newly transferred frame image on a presently displayed image;
- and
- updating the presently displayed image by the synthesized image each time one frame image is transferred and superimposed on the presently display image.
A control method for an image processing system capable of transmitting image information to a destination apparatus, reading out an original image, storing read image information in a memory, and displaying an image on a display screen of a display, said method comprising the steps of:
- first enlarging/reducing of the image size of the image information stored in the memory according to the size of the original image;
- outputting the enlarged/reduced image to the display;
- displaying a desired portion of a reference image at a desired magnification, the reference image being an image displayed in said outputting step;
- and
- performing a second enlarging/reducing, of the image size of the image information stored in the memory at the magnification of said first enlarging/reducing step;
- and
- transmitting the image information enlarged/reduced in said second enlarging/reducing step, to the destination apparatus.
A control method for an image processing system capable of receiving image information from a destination apparatus, storing received image information in a memory, displaying an image on a display screen of a display, and printing out the image information to a recording medium, said method comprising the steps of:
- first enlarging/reducing of the image size of the image information stored in the memory according to the size of the original image;
- outputting the enlarged/reduced image to the display;
- displaying a desired portion of a reference image at a desired magnification, the reference image being an image displayed under the control of said first enlarging/reducing step;
- performing a second enlarging/reducing of the image size of the image information stored in the memory at the magnification of the image displayed in said displaying step;
- and
- printing out the image enlarged/reduced in said second enlarging/reducing step to the recording medium.
Dependencies are inferred from the claim text.