Picture processing apparatus

Details Picture processing apparatus Picture processing apparatus

1986-12-05

1989-03-14

Yusko, Donald J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340792, 340798, G09G 102

Patent

active

048128368

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

This invention relates to a picture processing apparatus and, more particularly, to a picture processing apparatus for high-speed translation of a picture along the X and Y axes.
A technique which recently has come into use involves mounting a television camera at the end of an arm of an industrial robot and controlling the robot on the basis of a picture obtained from the camera. Conventionally, translation of the picture, in a picture processing apparatus of this kind, is carried out by reading the contents of a frame memory in which a source picture has been stored in advance and then performing calculations. However, since the picture processing apparatus for this purpose is composed of complicated hardware, and since the calculations are complex, processing cannot be executed at high speed.


SUMMARY OF THE INVENTION

An object of the present invention is to provide a picture processing apparatus in which picture translation processing can be carried out at high speed through a simple arrangement without using complicated hardware.
In accordance with the present invention, there is provided a picture processing apparatus for shifting a displayed picture described on a display screen to a predetermined position, the apparatus having: a first frame memory for storing one frame of a picture; a second frame memory for storing one other frame of a picture; a first SAM (serial access memory) capable of inputting and outputting a portion of picture data with respect to the first frame memory; a second SAM capable of inputting and outputting a portion of picture data with respect to the second frame memory, picture data from the first SAM being transferred to the second SAM; X- and Y-address counters for designating addresses of the first and second frame memories; and DX and DY registers for deciding an amount of an address offset when picture data are transferred from the first frame memory to the first SAM and from the first SAM to the second SAM.
In the picture processing apparatus, a control circuit applies an offset of .DELTA.X (in the column direction) when one row of picture data is transferred from the first frame memory to the first SAM and from the first SAM to the second SAM. Accordingly, the result of movement in the column direction (along the X axis) is input to the second SAM. Next, the control circuit inputs picture data from the second SAM to the second frame memory with an offset of .DELTA.Y (in the row direction). Accordingly, the result of movement in the row direction (along the Y axis) is input to the second frame memory. Since movement in the column direction has already taken place, movement of the picture along the X and Y axes is performed.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view for describing the principle of a picture processing apparatus according to the present invention;
FIG. 2 is a schematic view showing the relationship between a first frame memory and a second frame memory at translation of a picture in the picture processing apparatus of the present invention;
FIG. 3 is a block diagram of the picture processing apparatus of the present invention;
FIG. 4 is a schematic view illustrating various translations of a picture; and
FIG. 5 illustrates movement of a picture in the row direction.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

An embodiment of the present invention will now be described in detail with reference to the drawings.
FIG. 1 illustrates translation of a picture, e.g. movement of the character "A" from the upper left to the center. Specifically, in a picture processing apparatus, the picture stored in a first frame memory, e.g. an upper-left source picture "A", is offset by a predetermined amount along X and Y axes and the picture is stored in a second frame memory so as to occupy, e.g. an approximately central position, as shown in the right hand side of FIG. 1 and in FIG. 2.
In FIG. 3, numerals 1 and 2 denote X- and Y-address counters, respectively, for designating X and Y addresses of a first frame memory 8 and a s

REFERENCES:
patent: 4445114 (1984-04-01), Stubber
patent: 4546451 (1985-10-01), Bruce
patent: 4642621 (1987-02-01), Memoto et al.
patent: 4642790 (1987-02-01), Minshull et al.

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