JPS62188467A - Picture segmenting device - Google Patents

Abstract

PURPOSE:To attain efficient picture segmentation without executing picture data extending processing by forming a control part for controlling the output of picture data inputted on the basis of a control signal obtained from a comparing part and outputting only picture data in an optional area. CONSTITUTION:Inputted compression picture data are converted from the code of compressed picture data into numeral data indicating physical run length by a run length conversion part 7. The converted numeral data are integrated by an integration circuit 8 and the integrated result is compared with a set value stored in a setting part 11 by a vertical comparator 13. When the run length is decided as the one included within a segmented area range by the comparator 13, the output is signified by an output control circuit 16. When the run length indicated by the code is extended over the segmented area, the code of the length obtained by deleting the part other than the area on the basis of an encoding table 14 is used and outputted by an output selecting circuit 15. Consequently, efficient picture segmentation can be attained without requiring a memory of large capacity required for the extending or compressing processing of picture data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image cutting device that can efficiently cut out compressed image data.

[Conventional technology]

When transmitting or storing image data in image processing by a computer, the amount of image data is generally enormous, so there is a method to increase the efficiency of data transmission or storage by performing compression processing to reduce data redundancy. Often used. In this case, if the entire image is not required for image processing and only a portion is required, it is efficient to cut out only that portion and transmit or store it. In that case, a cutout process is required for the compressed image.

FIG. 4 shows an example of the configuration of this type of conventional image cutting device.

In Fig. 4, 1 is an image input section that inputs image data sent from the computer, 2 is an expansion processing section that expands the image data input from the image input section 1, and 3 is a section that cuts out the image data. 5 is an image memory that stores image data when cutting out image data from input image data; 4 is an image output unit that outputs the compressed cut-out image data; , 6 is an image cutout processing section that cuts out image data.

Next, the operation will be explained. Image data input from the image input section 1 is once stored in the image memory 5.

The image data stored in the image memory 5 is read out by the decompression processing section 2, and after being decompressed, the image data is stored in the image memory 5 again.
is accumulated in The decompressed image data is read out by the cutout processing section, and after the cutout processing is performed, it is stored in the image memory 5 again. The cut out image data is read out by the compression processing section 6, compressed, and then stored in the image memo U5 again. Finally, the image data output unit 4 outputs this compressed cut-out image data to the outside.

[Problems to be Solved by the Invention] Since the conventional image cropping device is configured as described above, it is necessary to expand the entire image once, then crop it, and then compress it again.
There are problems such as a large capacity memory is required, and processing takes time and is inefficient.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an image cutting device that can efficiently cut out images without decompressing image data.

[Means for solving problems]

For this reason, the image cropping device according to the present invention includes a setting section that sets the cropping size of an arbitrary region, and a detection section that sequentially converts the code of image data into a run length length of the original image and detects the position on the original image. a comparison section that compares the setting signal from the setting section and the detection signal from the detection section; and a comparison section that controls the output of the input image data based on the control signal from the comparison section to control the output of the input image data to the arbitrary area. The present invention is characterized by comprising a control section that outputs only the image data of.

[Effect]

The detection unit according to the present invention detects a position on the original image by converting the code of the image data into a run length of the original image.

Then, the comparison section outputs a control signal for controlling output of the input image data to the control section based on the detection signal from the detection section and the setting signal from the setting section for setting the cropping size of an arbitrary area. Here, the control section outputs only image data of an arbitrary area among the input image data based on the control signal.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram of an image cutting device showing an embodiment of the present invention. In the figure, 1 is an image input unit that inputs image data sent from a computer, and 7 is an image input unit that inputs the code of the compressed image data. A compression code run length conversion unit converts the image data into a run length length; 8 is a run length integration unit that integrates the run length converted by the compression code run length conversion unit 7; 9 is a line that detects the end code of the line; Termination code detection circuit 10 is line termination code detection circuit 9
A line counter 11 counts the number of horizontal lines based on the terminal code of the line detected by , a setting section 11 sets the cropping size of an arbitrary area, and 12 a horizontal line counter for the cropping size set in the setting section 11 . A horizontal comparison circuit 13 compares the image size with the integration result output from the run-length integration unit 8, and 13 indicates the vertical image size of the cutout size set in the cutout size register and the number of lines counted by the line counter 10. If the run length length of the original image data that uniquely corresponds to the code of the compressed image data spans the cutout area, the vertical comparison circuit 14 calculates the code that spans the boundary of the cutout area to the size of the cutout area. A code table to be converted together; 15 is an output selection circuit for selecting the code table 14 or the output from the horizontal comparison circuit 13; 16 is a code input from the input section 1 based on the outputs from the horizontal comparison circuit 12 and the vertical comparison circuit 13; This is an output control circuit that controls the output of compressed image data.

Here, the compression code run-length conversion unit 7, run-length integration unit 8, line end code detection circuit 9, and line counter 10 collectively constitute a detection unit IA that detects the position on the original image.
The horizontal comparison circuit 12 and the vertical comparison circuit 13 collectively constitute a comparison section IB, and the output selection circuit 15 and output control circuit 16 collectively constitute a control section IC.

Next, the operation will be explained. The compressed image data inputted from the image input section 1 is detected by the line end code detection circuit 9 as a coded string for each line. The line counter 10 counts the number of detected lines. This count value is compared with the setting value of the setting section 11 using the horizontal comparison circuit 12, detects whether it is within the setting range of the image, and outputs a control signal. Based on the detection result, the output control circuit 16 controls the output of image data. Further, the input compressed image data is converted by the run-length converting section 7 into numerical data that converts the code of the compressed image data into the physical run-length length. The converted numerical data is integrated by an integration circuit 8. The integrated result is sent to vertical comparator circuit 1.
3 is compared with the setting value of the setting section 11. If the vertical comparison circuit 13 determines that it is within the cutout region range, the output control circuit 16 makes the output significant. In this case, if the run length represented by the code extends over the cutout area, the output selection circuit 15 outputs a code having a length in which the portion outside the area is deleted using the encoding table 14. The compressed image data cut out through the above processing is outputted to the outside by the image output section 4. Furthermore, the second
The figure shows the contents of the image cutout. For example, if you want to cut out a rectangular area indicated by a dotted line from an input image, the cutout size register will contain xs + xt.
+Ys and YE values are set. Further, FIG. 3 shows an example of input compressed image data and image data after cutting out. 01 to CN are code strings, EOL is the terminal code of one line, and the codes represented by C+, Cz, and CN-1, C
The code represented by M is outside the extraction area. C3 and C
Since M-3 straddles the border of the cutout area, it is converted into codes of C1" and CN-3" to match the borderline.At the end of one line of cutout compressed image data, a line end signal (EOL) is sent. is added.

In addition to MH encoding, the compressed data targeted by this device can be similarly processed using other encoding methods as long as the run length in the original image and the code after compression uniquely correspond. It is possible. Further, the functions of this device can be easily realized by a software program.

〔Effect of the invention〕

As described above, the present invention includes a setting section that sets the cropping size of an arbitrary region, and a detection section that detects a position on the original image by sequentially converting the code of image data into the run length length of the original image. , a comparison section that compares the setting signal from the setting section and the detection signal from the detection section; and a comparison section that controls the output of the input image data based on the control signal from the comparison section to generate an image of the arbitrary area. Since it is equipped with a control unit that outputs only the data, compressed image data can be extracted as is, and efficient extraction can be performed without the need for large-capacity memory required for image data expansion and compression processing. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the image cutting function of the present invention, FIG. 3 is a diagram showing the correspondence between run length length and code, and FIG. 4 1 is a configuration diagram of a conventional image cutting device. ■...Image input section, IA...detection section, IB...comparison section, IC...control section, 11...setting section, 14...
- Code table, 4...output section.

Claims (1)

[Claims] Image data compressed such that the run length length in the original image and the code of the compressed image data uniquely correspond is input, and only an arbitrary region of this compressed image data is input. An image cropping device that crops and outputs the image to the outside, a setting section that sets the cropping size of the above arbitrary area;
A detection unit that detects the position on the original image by converting the code of the image data one by one into the run length length of the original image, and a comparison unit that compares the setting signal from the setting unit and the detection signal from the detection unit. and a control section that controls the output of the input image data based on the control signal from the comparison section and outputs only the image data of the arbitrary region.