Image input apparatus and control method therefor
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Yaguchi
Life of this patent
Estimating the term…
Abstract
In an image input apparatus for compressing, in real time, image data obtained by reading an image and storing it in a memory, a memory area is ensured, an original is read and its image data is outputted, the image data is compressed in real time, the compressed image data is stored in the memory area, and it is determined whether the compressed image data is completely stored in the memory area. If it is determined that the image data is not completely stored, the compression ratio is increased, and the original read, compression of read image data, and storage of the compressed image data are repeated using the changed compression ratio.
Claims30
A control method for an image input apparatus for reading an original and compressing image data of the read original in real time, said method comprising:
- ensuring a memory area for storing compressed image data;
- reading an original and outputting image data;
- compressing the image data in real time;
- storing the compressed image data in the memory area ensured in said memory area ensuring step;
- determining whether the compressed image data is completely stored in the memory area;
- and
- changing a compression ratio,
- wherein the changing of the compression ratio is performed when the compressed image data is not completely stored in the ensured memory area, and when the compression ratio is changed the reading of the same original, the compression operation using the changed compression ratio, the storing of the compressed image data, the determination operation, and the changing of the compression ratio are repeated, with the repetition being limited to a predetermined number of times, and the predetermined number of times being changed upon designation by a user.
A control method for an image input apparatus for reading an original and compressing image data of the read original in real time, said method comprising:
- ensuring a memory area for storing compressed image data;
- reading an original and outputting image data;
- compressing the image data in real time;
- storing the compressed image data in the ensured memory area;
- determining whether the compressed image data is completely stored in the ensured memory area;
- and
- changing a resolution
- wherein the changing of the resolution is performed when the compressed image data is not completely stored in the ensured memory area, and when the resolution is changed, the reading of the same original using the changed resolution, the compression operation, the storing of the compressed image data, the determination operation, and the changing of the resolution are repeated, with the repetition being limited to a predetermined number of times, and the predetermined number of times being changed upon designation by a user.
An image input apparatus comprising:
- a read unit adapted to read an original and output image data;
- a compression means unit adapted to compress the image data in real time;
- storage unit adapted to store the compressed image data;
- a control unit adapted to ensure in said storage unit a memory area for storing the compressed image data, control to store the compressed image data into the ensured memory area, and, as long as the compressed image data is not completely stored in the ensured memory area, repeatedly perform an operation of changing a compression ratio of said compression unit, controlling said read unit to read the same original, controlling said compression unit to compress the image data using the changed compression ratio, and storing the compressed image data in the ensured memory area, with the repetition of the operation being limited to a predetermined number of times;
- and
- a setting unit adapted to set the number of times.
An image input apparatus comprising:
- a read unit adapted to read an original and output image data;
- a compression unit adapted to compress the image data in real time;
- a storage unit adapted to store the compressed image data;
- a control unit adapted to ensure in said storage unit a memory area for storing the compressed image data, control to store the compressed image data into the ensured memory area, and, as long as the compressed image data is not completely stored in the ensured memory area, repeatedly perform an operation of changing a resolution used by said read unit, controlling said read unit to read the same original using the changed resolution, controlling said compression unit to compress the image data, and storing the compressed image data in the ensured memory area, with the repetition of the operation being limited to a predetermined number of times;
- and
- a setting unit adapted to set the number of times.
Dependencies are inferred from the claim text.