JPS6216685A - Two-dimensional solid-state image pickup device - Google Patents

Abstract

PURPOSE:To realize a windowing with a simple constitution without providing a special circuit by providing plural vertical reading lines between picture element cell array arranged in a matrix shape and performing the windowing with reading simultaneously plural picture element cells. CONSTITUTION:Each two of vertical reading lines provided by every picture elements array sends out a signal accumulated at each picture element cell to a signal selection circuit 400. The signal sent to the signal selection circuit 400 is taken out at signal lines 411 and 412 by switching control signals H1...Hm from a horizontal scanning circuit 200 through switches 401-406, and is given to an image process part 500 by a select signal supplied to a select signal input terminal 413 through data selectors 407-410. And by changing the vertical reading line numbers of each array, the connection method of the output line of each picture element cell against the above and the number of the picture element cell that performs a simultaneous reading, it is possible to perform optionally the windowing.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a two-dimensional solid-state imaging device. [Prior Art] Generally, an image captured by a two-dimensional solid-state imaging device is converted into an electrical signal, scanned two-dimensionally, and sent to an external device, where it undergoes signal conversion such as image processing. It is often done. For example, when performing noise removal or image enhancement of an input image signal, a two-dimensional local area (window) is used, and when performing an 8x8 convolution operation on that image, an MxN image The following processing is performed on the density value X1j to obtain the output July.
(1) p+ q=1 t 2+ 8 (i = L21---, M: j '' 1121---, N) Here, Wpq is a loading coefficient, and for example, in the case of noise+5 removal, as shown in FIG. In the case of image enhancement, a value such as that shown in Fig. 11 is taken.In addition, this weighting coefficient is generally circularly symmetrical about the center.On the other hand, conventional methods that perform such window processing There is a method as shown in Fig. 12 as a 20 method.In this first conventional example, the one-dimensional data obtained from the two-dimensional solid-state imaging device 1 is divided into two delay lines 2a for - rows, 2
b and 8x3 window processing section formed by 8x8 delay elements 8a to 81.
) Window processing is performed by performing the sum-of-products operation expressed by the equation. However, this method requires two delay lines for -rows, which makes the configuration complicated and expensive. As a solution to such problems, Japanese Patent Application Laid-Open No. 57-9
In Japanese Patent No. 5768, a method was proposed in which the density values of three vertical pixels were simultaneously read out using a two-dimensional solid-state imaging device capable of non-destructive readout. (Problems to be Solved by the Invention) However, in the two-dimensional solid-state imaging device disclosed in Japanese Unexamined Patent Application Publication No. 57-95768, as shown in FIG. A delay line is no longer required, but instead, horizontal pixel scanning is read out from pixel cells by the basic clock, and the data selector switches the signal in synchronization with the basic clock, so the switching characteristics of the pixel cells can be adjusted to high speed. In addition, the data selector requires a special circuit to send data to the three data lines, making it difficult to simplify and reduce the cost of the device. There is a problem. This invention was made by paying attention to such conventional problems, and has a simple and inexpensive structure.

〔Effect of the invention〕

As described above, according to the present invention, there is no need to use one line of delay line, and
As in the publication, desired window processing can be easily performed with a simple and inexpensive configuration without increasing the switching characteristics of the pixel cell 15 or requiring a special circuit for distributing data. can.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing one embodiment of the present invention. FIG. 2 is a diagram showing the configuration of an example of a pixel cell. FIG. 8 is a diagram showing an example of a load coefficient in window processing. 5 is a waveform diagram of signal No. 5 to explain the operation, FIG. 6 is a circuit configuration diagram of an example of the image processing section shown in FIG. 1, FIG. 7 is a diagram showing an example of the Humpolsion operation, and FIG. The figure shows an example of Ill in addition to the weighting coefficient in window processing. Figure 9 is a circuit diagram of the image processing unit when using the weighting coefficient shown in Figure 8. Figures 10 and 11 are noise removal processing. FIG. 1 is a diagram showing an example of a specific value of a weighting coefficient in image enhancement processing, and FIG. 100... Pixel cell section 101-115... Pixel cells 116-121... Vertical readout line 200.
・Horizontal scanning circuit ″゛20
1-203...Switching control signal line 800...Vertical scanning circuit 301-805...Control signal line 400...Signal selection circuit 401-406...Switch 407-410...Data selector 411, 412.414.415...Signal line 418.
...Select signal input terminal 500...Image processing unit Fig. 2 Fig. 4 Fig. 7 Fig. 12

Claims (1)

[Claims] 1. In a two-dimensional solid-state imaging device having pixel cells arranged in a matrix that can be read out non-destructively, a plurality of vertical readouts are provided between each pixel cell column and the output lines of the pixel cells in each column are connected in a predetermined relationship. A two-dimensional solid body comprising a line and means for simultaneously reading out a plurality of vertically continuous pixel cells, and configured to perform window processing while simultaneously reading out a plurality of vertically continuous pixel cells. Imaging device.