JPH0372792A - Control method for inverting left and right of picture for picture printer - Google Patents

Abstract

PURPOSE:To print out a television picture while left and right are inverted by providing a longitudinal line memory storing a still picture data taking upside down in a prescribed timing for each scanning of one horizontal direction of a still picture. CONSTITUTION:A longitudinal line memory 3 is provided which stores a data corresponding to a longitudinal line of a transmission still picture in a prescribed timing for each scanning in one horizontal direction of the still picture and outputs a stored data to a recording head (line head). Moreover, when a data is stored in the longitudinal line memory 3, the data is stored by taking upside down in figure. Then a write timing to the longitudinal line memory 3 is sequentially retarded for each reception of one still picture. Moreover, in order to print out its still picture onto recording paper 2 with inversion, a synchronizing still picture signal is required to be received till the longitudinal line memory 3 stores a data corresponding to the longitudinal line at the leftmost in the horizontal direction. Thus, the transmission still picture is printed out while left and right are inverted without provision of a video memory or the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image printer that prints a still image based on a transmitted still image signal on recording paper, and more specifically, when recording the still image horizontally inverted, The present invention relates to a method for controlling image horizontal reversal in an image printer that does not require memory.

[Conventional example] In recent years, various image printers for printing out television images have been proposed, including television packaging, camera-integrated VTRs, and electronic still cameras. Various functions have been added.

One of its functions is, for example, to horizontally flip a transmitted still image when printing it out. In this image printer, as shown by the solid line in FIG.
If it is a line head, the stored image data is read out for one line from the direction of arrow A (vertical line from the left direction) and latched into the recording head.
Furthermore, by outputting the image data for each line to the recording head, the stored still image can be printed out. At this time, the recording paper 2 is moved by one line in the direction of arrow B in the figure for every l line. Here, as shown by the two-dot chain line in the figure, when horizontally reversing the stored still image, when reading the data from the image memory 1, the image data in the screen memory 1 is changed one line from the direction of arrow C. Minutes (1 vertical line from the right edge)
The image data for each line is latched to the recording head, and the stored still image is horizontally reversed and printed out on recording paper 2.

[Problems to be Solved by the Invention] Incidentally, unless the image printer has the screen memory 1 described above, it was not possible to obtain a reverse print of the television image.

The present invention was made in view of the above-mentioned problems, and its purpose is to provide an image reversal control method for an image printer that can print out a transmitted still image by horizontally reversing it even without a screen memory or the like. It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the present invention converts a transmitted still image signal into digital data, drives a recording head in accordance with this digital data, and prints a still image on recording paper. In an image horizontal reversal control method for an image printer that records a still image horizontally and horizontally when printing out, upon receiving the still image signal, the still image data is vertically rotated at a predetermined timing every time the still image is scanned in the horizontal direction. The recording head is further provided with a vertical line memory for storing the still image in reverse, and when recording the transmitted still image horizontally and reversibly on the recording paper, the recording head is driven in accordance with the still image data stored in the vertical line memory. This is the summary.

[Function] Since the above method is adopted, the data of the vertical line of the still image is stored upside down in the vertical line memory due to the data of 1 still image. The data stored in the vertical line memory is transferred to the recording head section of the image printer. Therefore, if the vertical line memory is for one line, one vertical line of the transmitted still image is recorded on the recording paper, and one line is recorded for each still image worth of data. Furthermore, since data is stored upside down in the vertical line memory, the transmitted still image is recorded on the recording paper with the image horizontally reversed.

[Example] Hereinafter, an embodiment of the present invention will be described based on FIG.

In FIG. 1, the same parts as in FIG. 2 are designated by the same reference numerals, and redundant explanation will be omitted.

In the figure, the image printer stores data corresponding to a vertical line of a transmitted still image at a predetermined timing for each horizontal scan of the still image, and outputs this stored data to a recording head (line head). A vertical line memory 3 is provided.

Furthermore, when storing data in the vertical line memory 3, the data is stored upside down in the figure, as shown by the solid line arrows in the figure. The writing timing of the vertical line memory 3 is sequentially delayed each time one still image copy is received. In order to invert the still image and print it on the recording paper 2', the simultaneous still image signal must be received until the vertical line memory 3 stores the data corresponding to the leftmost vertical line in the horizontal direction. There is a need to.

By the way, if you store the above data in the vertical line memory 3 at a predetermined timing from the left side or the right side of the figure without turning the data upside down, it is possible to print out a horizontally flipped still image. When the printing time is fast due to the relationship between the frame frequency and the printing time, the vertical line memory 3 must have a 2-line or 3-line structure, but the control becomes extremely complicated. However, if the vertical line memory 3 has one line, it takes time to invert and print out one still image pattern, and furthermore, depending on the relationship between the printing time of that one line and the frame frequency of the image, the printing speed deteriorates rapidly. Therefore, it is not desirable.

Therefore, the vertical line memory 3 is designed to be able to simultaneously store data of a plurality of vertical lines of a still image. Further, as described above, it is not necessary to store data in the vertical line memory 3 from the left side or the right side at a predetermined timing for each horizontal scan, and it is possible to store data in one direction, which is easy to control.

In this way, if the vertical line memory 3 is composed of a plurality of lines, data corresponding to the plurality of lines in the vertical direction of the still image is stored in the vertical line memory 3 at a predetermined timing every l horizontal scan of one still image. The data is simultaneously stored upside down and the stored data is output to the recording head.

[Effects of the Invention] As explained above, according to the present invention, when both transmission static signals are converted into digital data and the recording head is driven in accordance with the digital data to print out a still image on recording paper. , in an image horizontal reversal control method for an image printer that records the still image horizontally inverted, upon receiving the still image signal, the still image data is stored upside down at a predetermined timing for each horizontal scan of the still image. It has a vertical line memory, outputs the data stored in the vertical line memory to the recording head, and
Since the predetermined timing is changed each time an image signal for a still image is received, it is possible to print a TV image horizontally reversed even without screen memory, and the vertical line memory can be easily controlled. effective.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and is a diagram for explaining an image horizontal reversal control method in an image printer, and FIG. 2 is a diagram for explaining an image horizontal reversal control method in a conventional image printer. . In the figure, 1 is a screen memory, 2 is a recording paper, and 3 is a vertical line memory.

Claims (1)

[Claims] (1) The image printer converts the transmitted still image signal into digital data, drives the recording head according to this digital data, and prints out the still image on recording paper, recording the still image horizontally inverted. In the inversion control method, when receiving the still image signal, a vertical line memory is provided that stores still image data upside down at a predetermined timing every horizontal scan of the still image, and the transmitted still image is stored in the recorded state. When horizontally reversing recording is performed on paper, the recording head is driven according to the still image data stored in the vertical line memory, and the data in the vertical line memory is reversed vertically and replaced each time the still image is transmitted. A method for controlling image horizontal reversal of an image printer, characterized in that: