KR0165219B1 - Image reverse apparatus and its method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an image left and right and up and down inversion apparatus, and more particularly, to an image left and right and up and down inversion apparatus of a video OHP (over head projection) incorporating a digital signal processing method and incorporating an electronic zoom function.

That is, the image up-down, left-right inverting apparatus according to the present invention includes a horizontal and vertical (H, V) address counter for generating an address, a multiplexer for allocating the address, a memory for receiving and storing an address and data, and a readout. It consists of a data multiplexer section that inputs data to the D / A converter, and electronically rotates the CCD by performing electronic video signal processing that rearranges image data stored in the memory section upside down, left and right using the address. The method of inverting the image improves reliability by improving the shortcomings that caused the reliability and structural defects, and the high degree of freedom in designing and designing the instrument due to the elimination of the mechanism moving part enables high quality product design and additional functions. Electronic zoom function is available, and product differentiation is possible.

Description

Image left and right, up and down reverse device and method

1 is a block diagram of the entire image signal processor,

FIG. 2 is a circuit diagram of an image counter and memory device according to the present invention as the address counter and memory of FIG.

* Explanation of symbols for main parts of the drawings

1 CCD imaging unit 2 CDS A / D conversion unit

3: DCP unit 4: D / A converter

5: Y / C Mixing Unit 6: Address Counter and Memory Unit

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an image left and right and up and down inversion apparatus, and more particularly, to an image left and right and up and down inversion apparatus of a video OHP (over head projection) which employs a digital signal processing method and incorporates an electronic zoom function.

1 is a block diagram of the entire video signal processor of the OHP. The configuration is as follows.

The OHP image processing section includes a CCD imaging section (1), a correlated double sampling (CDS) and A / D converter (2), a digital camera process (DCP) section (3), a D / A converter section (4), and Y / C mixing section 5, and an address counter and a memory section 6, respectively. Here, the CCD imaging unit 1 accumulates electric charges for each pixel from the reflected light of the subject, thereby making the image of the subject an electric pixel signal. In the correlate double sampling (CDS) and A / D converter 2, the correlate double sampling (CDS) unit removes noise mixed in the pixel signal output from the CCD imager 1. This takes a method of separating the reference accumulation amount and the signal accumulation amount constituting the pixel signal, canceling the noise mixed with the reference accumulation amount and the noise mixed with the signal amount, and removing the noise. The A / D converter 2 converts an analog pixel signal into a digital pixel signal. The DCP (digital camera process) unit 3 performs various image signal processing such as color signal modulation, white balance, and matrix on the digitized pixel signal. The D / A converter 4 converts the digital signals processed by the various video signals into analog signals. The Y / C mixing section 5 mixes the Y signal as the luminance signal and the C signal as the color signal. The address counter and the memory unit 6 store the digital signals processed by the luminance signal and the color signal in the memory, and make various images.

The operation of the image processor configured as described above is as follows.

The pixel signal output from the CCD imaging unit 1 is taken and sampled by the CDS (correlate double sampling) and A / D converter 2 to remove noise, convert it into an analog signal, and perform analog / digital conversion to perform 8-bit or Convert to a 10-bit digital signal.

The converted analog / digital conversion output is inputted from the DCP unit 3 to perform luminance signal processing and color signal processing, and then input into the memory of the address counter and the memory unit 6 to be reconstructed into various data. It is sent to the A converter 4 to perform digital / analog conversion. The digitally converted signal is then mixed by the Y / C mixing section 5 with the Y signal and the C signal and output to the video out terminal.

However, in order to obtain an inverted image of up, down, left, and right in the video OHP, the up, down, left, and right sides of the original surface are relatively required. In order to invert the top, bottom, left, and right sides of the document surface, the direction of the CCD is mechanically rotated by 90 °, 180 °, 270 ° or the like.

However, in order to rotate the direction of the CCD by 90 °, 180 °, and 270 ° mechanically in order to invert the up, down, left and right, the design of the mechanism is not easy, it is inconvenient to operate, and the wires connected to the CCD There was a twist. In addition, the method of mechanically rotating the CCD to flip the screen up, down, left and right has a number of problems due to shortening the life of the set and difficulty in manufacturing.

The present invention was devised to improve the above problems, and an object of the present invention is to provide an apparatus and a method for image up and down, left and right reversed without rotational operation of the mechanism so that the operation is simple and the production is easy and the life is not shortened.

In order to achieve the above object, the image up-down, left-right inverting apparatus according to the present invention includes: reading horizontal address counting means and writing horizontal address counting means for generating an address for outputting pixel data in the horizontal direction; Reading vertical address counting means and writing vertical address counting means for generating an address for counting every vertical scanning line (1H data); First multiplexers for transmitting the read and write addresses received from the read and write horizontal address counting means and the read and write vertical address counting means in reverse order for each field; Memory for dividing into a Y signal system, which is a luminance signal system, and a C signal system, which is a color signal system, each having a storage capacity of one frame, and changing image data input / output for each field for reading and writing for each field; Second multiplexers transferring image data of one frame of the memories outputted by changing positions in every field; And a digital / analog converter for digitally / analog converting image data of one frame whose position is changed in each field from the data multiplexer and outputting one frame of analog image signal.

In the present invention, the read and write horizontal address counting means of the read and write horizontal address counting means is converted into an up / down counter by the left and right inverting pins, and the write horizontal address counting means simply acts as an up counter. Preferably, among the read and write vertical address counting means, the read vertical address counting means is converted into an up / down counter by left and right inverting pins, and the write vertical address counting means is simply operated as an up counter. .

In addition, in order to achieve the above object, the image up, down, left and right inversion method according to the present invention comprises the steps of: addressing the image data converted into a digital signal to a predetermined block; Storing image data addressed in units of blocks in memory in units of blocks; Transferring the image data in units of the stored blocks upside down or left and right or upside down and left and right using the designated address; And digitally / analog converting the image data in units of blocks inverted up, down, left, and right, and outputting the analog data as an analog image signal.

In the present invention, the video data in units of blocks is video data in units of one field.

Hereinafter, an apparatus and a method for vertically and horizontally inverting an image according to the present invention will be described with reference to the accompanying drawings.

First of all, the present invention is characterized by using an electronic method instead of a mechanical method to solve the problem. That is, the image left and right and top and bottom inverting devices constituted by the address counter and the memory of the circuit as shown in FIG. 2 are provided by the address counter and the memory unit 6 of FIG. 1, and the digital signal processed Y / C signals are stored in the memory. Is characterized in that the image is inverted and then inverted up and down and left and right on the signal data by accumulating the read out addresses.

Such an up-down, left-right inversion process of the image will be described with reference to the actual circuit of FIG.

The basic principle of image inversion is to change the way the signals stored in the memory are read. That is, in the case of left and right inversion, the data of the normally input memory is read backwards from 1024, and in the case of up and down inversion, the vertical address is reversed to implement the function. In addition, it is also possible to invert the left and right and up and down at the same time by simultaneously performing the above method.

As shown in FIG. 2, the image up, down, left and right inverting circuits according to the present invention include horizontal and vertical (H, V) address counters 601, 602, 603, 604 for generating addresses largely, and multiplexers 611, 612, 613, 614 for assigning these addresses. ), Memory units 621, 622, 623 and 624 for receiving and storing an address and data, and data multiplexer units 631 and 632 for inputting the read data to the D / A converter 640.

Here, the address counters 601, 602, 603, 604 are largely composed of the horizontal (H) address counters 601, 602 and the vertical (V) address counters 603, 604. The H address counters 601, 602 output the pixel data in the horizontal direction. A circuit portion for generating an address for the memory is configured for reading and writing. The reading is converted into an UP / DOWN counter by left and right inverting pins. Writing is simply an UP counter.

The vertical (V) address counters 603 and 604 generate addresses for counting vertical scan lines (1H data), and are configured for reading and writing. The reading is operated as an up / down counter by an up / down invert switch, and The dragon only works as an up counter.

The address multiplexer sections 611, 612, 613, and 614 change the read and write addresses for each field and input them into the memories of the memory sections 621, 622, 623, and 624. The memory units 621, 622, 623, and 624 are divided into a Y signal system, which is a luminance signal system, and a C signal system, which is a color signal system, and each has one frame of memory. Data is inputted and outputted by changing each field for reading and writing to each field of 1 frame memory.

The data multiplexer sections 631 and 632 output the image data to the D / A converter 640 using 2x1 multiplexers since the positions where the respective memories are output for each field are changed.

The image up-down, left-right inverting device having such a configuration improves reliability by performing electronic signal processing in order to solve the disadvantage that the method of mechanically rotating the CCD to invert the image caused reliability and structural defects. The elimination of the mechanism's moving parts increases the degree of freedom in designing and designing the instrument, enabling high quality product designs. In addition, the electronic zoom function is available as an additional feature to differentiate the product.

On the other hand, the image up-down, left-right inverting device of the above configuration receives the CCD output, A / D conversion of the signal passed through the CDS, DSP processing, and then stored in the memory and inverted after the D / A conversion and output the video signal When installed in an OHP system, it is possible to obtain a clear image of left, right, upside down.

The operation of the image processing unit of the OHP having the image up-down, left-right inversion apparatus configured as described above is as follows.

The pixel signal output from the CCD imaging unit 1 is taken and sampled by the CDS (correlate double sampling) and A / D converter 2 to remove noise, convert it into an analog signal, and perform analog / digital conversion to perform 8-bit or Convert to a 10-bit digital signal.

The converted analog / digital conversion output is input from the DCP unit 3 to perform luminance signal processing and color signal processing, and then input into the memory of the address counter and the memory unit 6, and the electronic zoom, up, down, left and right are reversed on the image data. Then, this signal is sent to the D / A converter 4 for digital / analog conversion. The digitally converted signal is then mixed by the Y / C mixing section 5 with the Y signal and the C signal and output to the video out terminal.

As described above, the image vertical, horizontal and vertical inversion apparatus according to the present invention includes a horizontal and vertical (H, V) address counter for generating an address, a multiplexer for allocating the address, and a memory for receiving and storing the address and data. Is composed of a data multiplexer section for inputting the read data to the D / A converter, and performs an electronic video signal processing for rearranging the image data stored in the memory section upside down, left, and right by using the address. The method of inverting the image by rotating the controller improves reliability by improving the shortcomings that caused the reliability and structural defects, and increases the degree of freedom in designing and designing the instrument by eliminating the operation part of the instrument, thereby enabling high quality product design. Electronic zoom function is available to differentiate products. have.

Claims (3)

Reading horizontal address counting means and writing horizontal address counting means for generating an address for outputting pixel data in the horizontal direction; Reading vertical address counting means and writing vertical address counting means for generating an address for counting every vertical scanning line (1H data); Multiplexers for transferring the read and write addresses received from the read and write address counting means and the read and write vertical address counting means for each field; Memory for dividing into a Y signal system, which is a luminance signal system, and a C signal system, which is a color signal system, each having a storage capacity of one frame, and changing image data input / output for each field for reading and writing for each field; Data multiplexers for conveying image data of one frame of the memories outputted by changing positions every field; And a digital / analog converter for digitally / analog converting image data of one frame whose position is changed in each field from the data multiplexer and outputting one frame of analog video signal. Up and down, left and right reverse device. The read / write horizontal address counting means of the read and write horizontal address counting means is converted into an up / down counter by left and right inverting pins, and the write horizontal address counting means is simply operated as an up counter. Image up and down, left and right reversing apparatus, characterized in that. 2. The apparatus of claim 1, wherein the read vertical address counting means of the read and write vertical address counting means is converted into an up / down counter by left and right inverting pins, and the write vertical address counting means is simply operated as an up counter. Image up and down, left and right reversing apparatus, characterized in that.