JPS6214871B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moving image/still image separation device that automatically separates stationary figures and moving figures in a graphic processing system.

Conventionally, this type of moving image/still image separation apparatus has the configuration shown in FIG. In FIG. 1, an input image signal 1 is subtracted by a signal from a multiplication circuit 11 by a subtraction circuit 2, and an output signal from a multiplication circuit 10 is subtracted by a subtraction circuit 3 from the output signal of this subtraction circuit 2. The output signal of the subtraction circuit 3 is multiplied by a constant K ₃ 15 by the multiplication circuit 4.
The output signal of is added to the output of the memory 6 by the adder circuit 5. The output signal of memory 6 is sent to multiplication circuit 1
Multiplied by the constant ₁ 13 by 0.

On the other hand, the other output signal of the memory 6 is multiplied by a constant K ₄ 16 by the multiplier circuit 7, and the output signal of the multiplier circuit 7 is added to the output of the memory 9 by the adder circuit 8. The output signal of the adder circuit 8 is input to a memory 9 and stored therein. The output signal of the memory 9 is sent to the multiplication circuit 11
is multiplied by the constant K ₂ 14. and memory 6
and the signals in the memory 9 are displayed as moving image data and still image data.

That is, as shown in FIG. 1, in the separation and extraction of moving images and still images, the numerical calculation formula for the input signal having the address (I, J) is usually SC[I, J) as the output signal of the subtraction circuit 3. Deviation signal at address (I, J), SI [I, J] is input image signal 1 at address (I, J), M ₁ (I, J), M ₁ ′ (I, J)
are the new and old contents of the address (I, J) in the first storage section, and M ₂ (I, J), M ₂ ' (I, J) are the new and old contents of the address (I, J) in the second storage section. Contents, _K1 to _K4
If the parameters are suitable for extracting SC[I,J]=SI[I,J]−K ₁ M ₁ ′ [I,J]−K ₂ M ₂ ′[I, J] …( 1) M ₁ [I, J] = K ₃ SC [I, J] + M ₁ ′ [I, J] ...(2) M ₂ [I, J] = K ₄ M ₁ ′ [I, J] + M ₂ ' [I, J] ...(3) A moving image is stored separately in the first storage section, and a still image is stored in the second storage section. Therefore, in order to configure the moving image/still image separation device as described above, four multiplication circuits 4, 7, 10, 11, two subtraction circuits 2, 3, and two addition circuits 5, 8 are required. However, the disadvantage is that two memories 6 and 99 are required, and the number of circuit elements increases, making the circuit complicated.

The present invention solves the above-mentioned drawbacks and provides a moving image/still image separation device whose circuit is simplified by using the same multiplier adder and memory.

Next, embodiments of the present invention will be described with reference to the drawings.

As described above, the conventional device requires four adder/subtractor circuits and four multiplier circuits, as shown in equations (1) to (3), and four constants K ₁ to K ₄ are required. However, in these arithmetic circuits, the addition/subtraction circuits and multiplication circuits are all connected in the same way, and the variables ±
Since it can be expressed in the form of (variable x constant), a moving image/still image separation device can be configured with four multiplier adders each consisting of a multiplication circuit and an addition/subtraction circuit and two memories.

The multiplier adder 17 has the configuration shown in Fig. 2, and calculates the variable 23± (variable 21 x constant 22) for three inputs: variable 21, constant 22, and variable 23, and includes a multiplier circuit 18, an addition/subtraction circuit 19, and the addition/subtraction circuit selects addition or subtraction. There are four multiplier adders 17 and memory 6,
FIG. 3 shows an example using two 9's.

In this circuit, the address of memory 6 (I,
The signals stored in J) are output to multiplier adders 18, 19, 20. Further, the signals stored at addresses (I, J) in the memory 9 are connected to be output to multiplier adders 17 and 20.

When input image signal 1 with address [I, J] is input, multiplier adder 17 subtracts from input image signal 1 the signal output from memory 9 multiplied by constants K ₂ and 14. .
The signal is input to the multiplier adder 18, and the product of the signal output from the memory 6 and the constants K ₁ and 13 is subtracted from the signal. Next, the signal output from the multiplier adder 18 is multiplied by a constant K ₃ , 15, and the signal from the memory 6 is added and newly stored in the memory 6.

On the other hand, the multiplier adder 20 multiplies the output signal from the memory 6 by a constant K ₄ , 16,
The signals in the memory 19 are added and newly stored in the address (I, J) of the memory 9. The data in the memory 6 is moving image data, and the data in the memory 9 is still image data. The display device 12 displays the output signals of the memory 6 and the memory 9.

Also, this multiplier adder 17, 18,
Since the 19,204 multiplier adders are the same, it is possible to use 171 multiplier adders and execute the calculations in a time-sharing manner.

As explained above, the present invention has the advantage that the circuit can be simplified by configuring the circuit using multiplier adders, and the same multiplier adder can be used.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional moving image/still image separation device, Fig. 2 is a block diagram of a multiplier adder, and Fig. 3 is a block diagram showing an embodiment of the present invention using a multiplier adder. . 1...Input image signal, 2, 3...Subtraction circuit,
4, 7, 10, 11... Multiplier circuit, 5, 8... Adder circuit, 6, 9... Memory, 12... Display device, 17, 18, 19, 20... Multiplier adder.

Claims (1)

[Claims] 1. A first memory and a second memory in which each pixel signal of the input image signal is updated and stored each time a new pixel signal is input, and the input image signal is read from the second memory. a first subtraction circuit that subtracts the output of a first multiplication circuit that multiplies the output pixel signal by a predetermined coefficient; and a pixel signal read from the first memory from the output of the first subtraction circuit. a second subtraction circuit that subtracts the output of a second multiplication circuit that multiplies the output of the second subtraction circuit by a predetermined coefficient; a third multiplication circuit that multiplies the output of the second subtraction circuit by a predetermined coefficient; a first addition circuit that adds the output of the first memory to the output of the first memory and inputs the added output to the first memory; and a fourth multiplication circuit that multiplies the output of the first memory by a predetermined coefficient. A moving image/still image separating device comprising a circuit, and a second adding circuit that adds the output of the fourth multiplication circuit and the output of the second memory and inputs the added output to the second memory. , the first subtracter and the first multiplier, and the second subtracter and the second multiplier, respectively, are integrally configured.
third and fourth multiplier adders configured by integrating the third multiplier and the first adder, and the fourth multiplier and the second adder, respectively. A moving image/still image separation device comprising: