Abstract: There are provided a copying machine executing the processing for reading image data from a document and the processing for printing the image data, a computer for editing image data read by the copying machine, and a memory board having a memory for storing therein image data to which an image data bus of the copying machine and an internal bus of the computer are connected respectively, and the copying machine executes the processing for reading image data from a document and writing the image data in a memory, the computer executes the processing for reading the image data from a memory, editing the image data, and writing the edited image data again in the memory, the copying machine executes the processing the reading the edited image data from the memory and printing the image data, and the memory board controls the operations for reading and writing the image data by the copying machine.

Abstract: There are provided a copying machine executing the processing for reading image data from a document and the processing for printing the image data, a computer for editing image data read by the copying machine, and a memory board having a memory for storing therein image data to which an image data bus of the copying machine and an internal bus of the computer are connected respectively, and the copying machine executes the processing for reading image data from a document and writing the image data in a memory, the computer executes the processing for reading the image data from a memory, editing the image data, and writing the edited image data again in the memory, the copying machine executes the processing the reading the edited image data from the memory and printing the image data, and the memory board controls the operations for reading and writing the image data by the copying machine.

Abstract: There is provided by the present invention an image forming apparatus including a one-chip microcomputer having white reference data for a first sheet of copy fetched with shading gate arrays in a stable region for a halogen lamp, using said white reference data when forming an image for a first sheet of copy, and also having shading-corrected white data fetched for a second or subsequent sheet of copy each time an image is formed.

Abstract: An image forming apparatus is disclosed for providing accurate shading corrections. The apparatus includes an illumination source for illuminating an image, and a photoelectric converter that receives reflected light from the image and photoelectrically converting the reflected light. The output signal from the photoelectric converter is amplified and converted to a digital signal. The digital signal is then subjected to shading correction. A controller is provided for ensuring that white reference data for a first sheet of copy is fetched from a stable region of the illumination source during shading correction. The white reference data is subsequently used when forming an image for a first sheet of copy.

Abstract: There are provided a copying machine executing the processing for reading image data from a document and the processing for printing the image data, a computer for editing image data read by the copying machine, and a memory board having a memory for storing therein image data to which an image data bus of the copying machine and an internal bus of the computer are connected respectively, and the copying machine executes the processing for reading image data from a document and writing the image data in a memory, the computer executes the processing for reading the image data from a memory, editing the image data, and writing the edited image data again in the memory, the copying machine executes the processing the reading the edited image data from the memory and printing the image data, and the memory board controls the operations for reading and writing the image data by the copying machine.

Abstract: There is provided by the present invention an image forming apparatus including a one-chip microcomputer having white reference data for a first sheet of copy fetched with shading gate arrays in a stable region for a halogen lamp, using said white reference data when forming an image for a first sheet of copy, and also having shading-corrected white data fetched for a second or subsequent sheet of copy each time an image is formed.