Image pick-up device with a motion detection circuit and a memory control circuit

• US 5,995,141 A
• Filed: 08/24/1995
• Issued: 11/30/1999
• Est. Priority Date: 08/26/1994
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hieda, Teruo
• Primary Examiner(s): HO, TUAN V
• Application Number:
  US08/518,804
• Time in Patent Office: 1,559 Days
• Field of Search: 348/207, 348/208, 348/231, 348/155, 348/699, 348/700, 348/701, 396/52, 396/53, 396/55
• US Class Current: 348/208.6
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors

Abstract

An image pick-up device comprises an image pick-up optical system for focusing an optical image of an object, an image pick-up element having a predetermined number of pixels for photo-electrically converting the optical image focused by the image pick-up optical system to produce an image pick-up signal, a signal processing circuit for processing the image pick-up signal from the image pick-up element to generate image data, a first memory for storing the image data from the signal processing circuit by image unit, a second memory having a size capable of storing larger image information than the number of pixels of the image pick-up element for storing the image data read from the first memory, a motion detection circuit for detecting a motion of the image pick-up optical system, and a memory control circuit for controlling the reading from the first memory and the writing to the second memory based on the detection by the motion detection circuit.

Claims

1. An image pick-up device comprising:

an image pick-up optical system for focusing an optical image of an object;

an image pick-up element having a predetermined number of pixels for photo-electrically converting the optical image focused by said image pick-up optical system to produce an image pick-up signal;

a signal processing circuit for digitally processing the image pick-up signal from said image pick-up element to generate image data;

a first memory for storing the image data from said signal processing circuit by image unit;

a second memory having a size capable of storing larger image information than the number of pixels of said image pick-up element for storing the image data read from said first memory;

motion detection means for detecting a motion vector caused by a motion of said image pick-up optical system; and

memory control means for controlling the reading from said first memory and the writing to said second memory, said memory control means controlling an address of said second memory for writing the image information read from said first memory to said second memory on the basis of the movement vector detected by said motion detection means so as to generate an image by combining a plurality of the image information read from said first memory.

2. A device according to claim 1, wherein said motion detection means is an acceleration sensor disposed on a camera.

3. A device according to claim 1, wherein said first memory is one of a frame memory and a field memory, and wherein the size of said second memory is capable of storing a plurality of images each of which can be stored in said first memory.

4. A device according to claim 1, further comprising an interface for transmitting an image read out from said second memory to an external equipment.

6. A device according to claim 2, wherein said memory control means generates an image having a larger number of pixels than an image stored in said first memory by using said second memory to perform motion correction on each of a plurality of images read out from said first memory and writes the motion corrected images into said second memory.

7. A device according to claim 2, wherein said memory control means generates an image of larger size than an image stored in said first memory by using said second memory to perform motion correction on each of a plurality of images read out from said first memory and writes the motion corrected images into said second memory.

8. a device according to claim 2, wherein said motion detection means includes an acceleration sensor disposed on a camera and a motion detection circuit for detecting motion of an image from the image pickup signal.

9. A device according to claim 2, wherein said first memory is one of a frame memory and a field memory, wherein the size of said second memory is capable of storing a plurality of images each of which can be stored in said first memory, and wherein said memory control means generates an image having a larger number of pixels than an image stored in said first memory by using said second memory to perform motion correction on each of a plurality of images read out from said first memory and writes the motion corrected images into said second memory.

10. A device according to claim 2, wherein said first memory is one of a frame memory and a field memory, wherein the size of said second memory is capable of storing a plurality of images each of which can be stored in said first memory, and wherein said memory control means generates an image of larger size than an image stored in said first memory by using said second memory to perform motion correction on each of a plurality of images read out from said first memory and writes the motion corrected images into said second memory.

11. A device according to claim 2, further comprising an interface for transmitting an image read out from said second memory to an external equipment.

5. An image pick-up device comprising:

an image pick-up optical system for focusing an optical image of an object;

an image pick-up element having a predetermined number of pixels for photo-electrically converting the optical image focused by said image pick-up optical system to produce an image pick-up signal;

a signal processing circuit for digitally processing the image pick-up signal from said image pick-up element to generate image data;

a first memory for storing the image data from said signal processing circuit by image unit;

a second memory having a size capable of storing larger image information than the number of pixels of said image pick-up element for storing the image data read from said first memory;

motion detection means for detecting a motion of said image pick-up optical system and a motion of the image by the image data from said signal processing circuit; and

memory control means for controlling the reading from said first memory and the writing to said second memory based on the detection by said motion detection means.

12. An image pickup method comprising:

an image pickup step of photo-electrically converting an optical image formed by an image pickup optical system to produce an image pickup signal;

a signal processing step of digitally processing the image pickup signal produced by said image pickup step to generate image data;

a first storing step of storing in a first memory the image data output from said signal processing step;

a second storing step of storing image data read from the first memory into a second memory, the second memory having a size capable of storing larger image information than a number of pixels of the image data read from the first memory;

a motion detection step of detecting a motion vector caused by a motion of the image pickup optical system; and

a memory control step of controlling the reading from the first memory and the writing to the second memory, said memory control step controlling an address of the second memory for writing thereto the image information read from the first memory on the basis of the movement vector detected by said motion detection step so as to generate an image by combining a plurality of the image information read from the first memory.

13. A method according to claim 12, wherein the first memory is one of a frame memory and a field memory, wherein the size of the second memory is capable of storing a plurality of images each of which can be stored in the first memory, and wherein said memory control step generates an image having a larger number of pixels than an image stored in the first memory by using the second memory to perform motion correction on each of a plurality of images read out from the first memory and writes the motion corrected images into the second memory.

14. A method according to claim 12, wherein the first memory is one of a frame memory and a field memory, wherein the size of the second memory is capable of storing a plurality of images each of which can be stored in the first memory, and wherein the memory control step generates an image of larger size than an image stored in the first memory by using the second memory to perform motion correction on each of a plurality of images read out from the first memory and writes the motion corrected images into the second memory.