JPS5862976A - Video signal processing system - Google Patents

Abstract

PURPOSE:To obtain illumination information with high accuracy from optical information, by approximating the change in a video signal between picture elements with a straight line tied with the video information of adjacent picture elements, and assigning a plurality of sets of information on the straight line for the part between the picture elements. CONSTITUTION:An image sensor 1 receives information of light (a) and outputs serially a video signal (b) in synchronizing with a clock (g) from a clock generator 2. This signal (b) is converted into a digital signal with an A/D converter 3 at each picture element and stored in a storage circuit 5. Digital signals for adjacent picture elements' share are read out to two registers 7, 8 sequentially from the circuit 5. In an operation circuit 10, the difference of data of the adjacent two picture elements is calculated, this difference is proportionally shared for the picture elements, to assign a plurality of digital data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video signal processing system in which video information 11 between adjacent votes in an image sensor is obtained from video information possessed by each pixel.

Image center! The photo element (-cable) with a small area is arranged at a constant pitch, and the light weight detected by each nest is measured! It is a cable that converts the data into electrical quantity and sends the data serially to the terminal. There are two types of image sensors: line imaginary and area ya. 11# has 11 pixels arranged in a straight line, so it detects light one-dimensionally, and the latter has pixels arranged in an S grid pattern, which detects light. Planar (two-dimensional) K detection.

Now, like Mll, image ν! 1 double-headed n −S
, n -2, . . . When light with an illuminance distribution as shown in dIα is incident, each pixel n-5, n-2, . . . Since the image center t1 detects the brightness of the brightness, the image center t1 has a step-like clear sky signal -
Output. Here, if you set a level C-C that does not match the output of any pixel and try to find a pixel that gives this level 0, conventionally, n* of magnitude is opposite to level C. Let's use it as an Idi index to find one III prime 1° of the adjacent m indexes, s+1, which have pincer polarization outputs d and -. But this method.

Since the position of the pattern can only be resolved into a dimension corresponding to 4 pitches of pixels 1 based on the information of the light α, this method can be applied as a pattern positioning means for a device that requires a higher degree of positioning.

There is a problem with detection accuracy. Possible ways to solve this inconvenience include choosing an image sensor with a smaller pixel pitch, or increasing the magnification of the optical system that forms the image. It has been difficult to solve this problem due to manufacturing limitations and limitations on the detection range.

The purpose of the present invention is to eliminate the drawbacks of the conventional FFT method described above, and reduce the amount of illumination adjustment by $1 in seven images! The purpose of the present invention is to provide a video decoding processing method that takes into account the high accuracy of IW debts and flatters I.

Book! Due to the above-mentioned purpose coupling, the i-light is [!] from the image sensor. Changes in video signals between pixels that cannot be obtained
Approximate the video information of the 149 matching ll1i system by connecting it with a straight line, and combine multiple pieces of information on Naogan into a 1# index -
It is characterized by the fact that it does not attach like ':'.

The present invention will be explained below with reference to FIG. 2 and FIG. The sl diagram is a Glock diagram of an S example of the present invention.

Figure 3 shows the output waveform of the main part of Figure @2.

In JIII2#IA, 1 is image seven-1F-
, 2 is a beam generator, 5 is a 4'D converter, 5.11 is a memory circuit for Yarehouki 1 and JII 2, 4 is an address counter, 6 is a timing circuit, 7 and 8 are each 1IE
1 and Jl#I2 registers, and 9 is an arithmetic circuit.

10 is a setting data input terminal.

Next, the previous work of the present invention according to @2 Figure 51.

Explain to the IF consultant. Image sensor 1 detects light 6,
Information t on the illuminance of element a detected by each IdiitA.

Nori a Tsuk occurred from 42! 1!11M and outputs the video 11M output k in series. If the image sensor 1 is a line type, the primary 11f report will be transferred from the 1st prisoner system to the 2nd direction, and if it is an area type, it will be transferred sequentially from the upper line to the 12th element II, like a TV running system. Information will be sent to you once. Naka, continuous l1ilA (dwelling light G
Assuming that exhibits an illuminance distribution like the curve da,
Since each pixel of the image yR11 obtained by eating that part detects the average illuminance, the floor I
This becomes an R wave. Image 11 is summed in this way and output from the image sensor 1 with 4 VC pixels in series! r output A @, digital signal r(%-
5) °.

F(s-2)... and stored in the storage circuit 5 of j911. Image sensor 1 detects leakage 6
This is a! i'Jk, vl
If a command to start conversion is given to the I filter fs converter 5, the address counter 4t# is updated, and address information @i is given to the memory tg11I&5, a digital signal r(%-3) is generated.

V (Rue 2)... becomes when it is transferred to the memory circuit 5. Here, ru indicates the arrival number of the pixel, and 1
Take N (all 11i elements a) consecutive integer values from .

On the other hand, the timing circuit 6 outputs the video signal output signal 71! f (output of all pixels) is detected and the following operation t'timing 1' is performed. .

The process will be explained in detail below. At timing ial #6, a digital signal VC route 5) is sent to the storage circuit 5.

Atto in the same order as when memorizing r(%-2)...

The response counter 4 is updated, and the digital signals from 11g5 and 1 are held in the first register 7, and the digital signal that was already held in the register #11 is transferred to the second register. Shift to register 8 of

In this way, register 7 of sl and register 8 of 142 are always dominated by one adjacent digital signal of F(s+1) and r(r), respectively.

The tie controller 6 gives a command to the arithmetic circuit 9 at almost the same timing as in the previous work. In response to this command, the arithmetic circuit 9 outputs the setting data tl from the human input terminal 10 (as a parameter, % l[-supplementary threshold: J
! Execute.

〆(n+t)-VC path)69180. (,) D (ru)
=d ll Cnh) =J'Cf&)ten&j)U) (#
-0, 1,..., t-1) - (2) Equation (1) shows the amount of data when one piece of data vd is divided,
Equation (2) is assigned to the interval that is better by partitioning (
Interpolation III (prorated) is shown. The arithmetic circuit 9 is (2
) to obtain the interpolated value ν(f&&)t', which is first stored in the second storage circuit 11, and 11 of the 4111 data.
A command is given to the initiating circuit 6 when the process is completed. below,
Updating the address counter 4 for all 111 elements, shifting the δ digital signal r(F&) from the register 7 to the register 8, holding the digital signal V (s+1) from the '11111 circuit 5 to the register 7, and using the arithmetic circuit 9. By repeating the direct interpolation calculation (Equations (1) and (2)) and the writing at'p of the interpolation box V into the ml billion circuit 11.

Direct interpolation in the scanning direction is completed for all adjacent pixel sections.

Top 1c! - The image sensor is an interpolation in the scanning direction, so for a line-type image sensor, the interpolation ends with only the f image described above. However, for the image center t where the area is hazy, interpolation of one element located perpendicular to the scanning direction is also required. The self-made work required for this is described below. The tying path 6 performs interpolation t'*o of the running cover, switches the address instruction by the address counter 4 from the previous memory 1iilli5 to the memory circuit 11, and sequentially positions the address from the memory circuit 11 in the manufacturing direction. The address of the address counter 4 is updated so as to extract the data of the lll1 element. According to the following % previous ml shift tIIJ work, the digital signal from the memory circuit 11 is
Every time Ijt begins to appear, registers 7.8 and Enpoenj@9 are used to register fI! After i, this interpolation box is stored in the new box in 1111. If necessary, setting data indicating the division formula of pixel 1- may be set to S during interpolation in the scanning direction due to the tinging cycle JllI6.

With the above production, the assignment of the pixel and 1 rope of the bar by the d1 line complement has been completed, and it is strictly memorized - 1 @ 111
Ic valley information is stored.

In FIG. 6, number 1 at 8 is the interpolation II obtained in memory path 11.
[v(nh)'9, and Todoroki is, for example, the memory circuit 1
1 next lRK, followed by l)/A transformer (not shown) i onboard digital signal V (connection h)t-anagt#
C.It is a modified offering. In figure 5, each small wave ヱ2 shape is, actually, the time axis □ is set to Jllll,
In order to contrast No. 11, it was placed on the same time axis in Suk 51m.

43m is 41!1Ailllt'5 division' (et= s
) L*ffl, but since the nest beach is small in imitation, it is clear that by artificially increasing mIA, the interpolated data 1 approximates the illuminance distribution of the real light a.

The above is just an example of a hardware version of this R1 light, including 5.11 memory circuits, 7.8 registers, and performance J! circuit 9
Of course, it is also possible to replace the above with a combiator and execute the process 4 shown above by software.

That’s all for #J1. As explained above, the distance between adjacent pixels of the image signal obtained from the image sensor is divided into multiple sections, and the #1 search is approximated by the images of those sections, and each of the divided sections is approximated. By allocating information proportionally, it is possible to obtain the same effect as using the t7I prime number (reducing the wj prime pitch), and the illuminance information can be transferred from the light information to the cylindrical level. The present invention is a promising means for a one-leg device that utilizes an image sensor.

Figure 41 is a general output layout diagram of an image sensor, 5g.
Figure 2 is a gummy diagram showing an example of this JA@, and Figure 43 is a waveform of the main part in the stripe diagram 2.

1...Image center? 2... Ri atsuku departure 4? i)
3... Le converter 4... Address counter 5
．． 11...Memory circuit 6...Tinging circuit ゛7
．． 8...vexs? ...Arithmetic circuit 10...
Setting data Jinriki Ruko daibajin arrogant *mn*

Claims (1)

[Claims] fIk image signal t# from the image sensor tube for each vote
The Y-digital conversion 6 converts these signals into digital signals, and from the storage circuit once stored in the 111th Yariro, the digital signals for the Ijii lines that are mutually transmitted are sequentially transferred to the 21I.
In the arithmetic circuit, the register Kd of the above two adjacent
# Calculate the difference between the data of search and distribute this difference proportionally to Iai yakoseki to make the digital data of tIi number 1 to 11Ilt)
1-Featured image signal processing method.