JPS62183266A - Input device for gradation correcting curve - Google Patents

Abstract

PURPOSE:To improve the operability at input by providing a pointing device and a CRT display device to input a gradation correction curve based on an image with the operation that a cursor displayed on a display screen of the CRT display device is moved by the pointing device. CONSTITUTION:A registration number of a gradation curve is inputted from a keyboard, a mouse 10 is matched with a prescribed position on an exclusive pad 101 and the mouse 10 is moved sequentially along the gradation curve on the image. Then the X, Y coordinates on the exclusive pad 101 corresponding to an input point position 102 of the mouse 10 is transferred sequentially via a memory to an arithmetic circuit 12 and a memory 13, transferred to a display circuit 15 and displayed sequentially on the display screen of a CRT 16. The X, Y coordinates are stored sequentially as the corrected graduation curve in a gradation correction table of the memory 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gradation correction curve input device for performing gradation correction of photographic originals and the like.

2. Description of the Related Art Conventional devices of this type are equipped with a so-called gradation correction ROM in which fixed data for gradation correction is stored in advance, or, as shown in FIG. Input a data value for correction, write this data value to the nonvolatile memory 2 as new data, generate a gradation correction curve based on this data, and visually check the generated gradation correction curve with an oscilloscope 3. It was structured as follows.

Problems to be Solved by the Invention Therefore, in a device equipped with the gradation correction ROM, it is impossible to correct the gradation correction curve unless by replacing the ROM. Furthermore, in devices equipped with input means using a numeric keypad, it is necessary to enter correction data one by one using the numeric keypad, which poses a problem in that the correction takes time and is extremely inefficient.

Furthermore, in both of the above-mentioned devices, the gradation correction curve is visually checked using an oscilloscope, so a special circuit or device for this purpose is required.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to move the cursor to a desired position on the display screen by using a pointing device instead of inputting from the numeric keypad as in the past. - It is an object of the present invention to provide a gradation correction curve input device that allows inputting a gradation correction curve on an image exactly as the image is displayed while giving instructions.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pointing device, a means for accumulating output data (location information) of this device, and a means for interpolating and interpolating between the accumulated data. The present invention is equipped with means for storing the gradation correction curve, and a CRT display for displaying the gradation correction curve and the input points of the curve.

Effect of the Invention With the above-described configuration, the present invention allows the input point of the gradation correction curve to be moved and indicated with a cursor, and the indicated position can be displayed on the CRT display screen. You can enter it as is.

Further, when inputting the gradation correction curve, the input point can be input while visually checking the input point displayed on the CRT display screen, which improves work efficiency compared to conventional devices.

Embodiment FIG. 1 is a schematic block diagram showing an embodiment of the apparatus of the present invention, in which numeral 10 indicates a pointing device such as a digitizer or a mouse (hereinafter referred to as a mouse);
Reference numeral 11 denotes an auxiliary storage device (hereinafter referred to as memory) as a means for accumulating and storing each point data (X, Y coordinate position information) input using the mouse 10.

cormorant. ), 12 is an arithmetic circuit for generating a line graph (complemented gradation correction curve) by interpolating, for example, a straight line between arbitrary point data from 0 to FF stored in the memory 11; A memory for storing the complemented gradation correction curve # (hereinafter referred to as gradation curve) generated by the arithmetic circuit 12, and the gradation curve is registered in the gradation correction table of this memory 13. .14 is memory 13
This is a density conversion circuit that converts gradation density according to a gradation curve registered in .

A display circuit 15 has both the function of displaying the memory contents of the memory 11 in a table and the function of displaying the memory contents of the memory 13 as a graph.

16 is a CRT display (hereinafter referred to as CRT) such as a graphic display, and tables and graphs input from the display circuit 15 are displayed on the display screen of this CRT 16. In other words, OR, T 16, gradation curve (graph) and curve input point (table) (
This input point position is displayed according to the cursor instruction. ) can be viewed visually.

In Figure 2, the input point position using the mouse 10 is 0RT.
161 is the display screen of 0RT16, and this example shows a graph display screen consisting of a ruled line table of 0-F'p. ing. 162 (X mark) is a display position, and 163 is a straight line portion interpolated by the arithmetic circuit 12.

101 is a special bat for Mouse 10, which can be used vertically (Y) and horizontally (X).
) Both are board surfaces with ruled lines of 0 to FF, for example, 256 points.

102 (X mark) is the mouse 100 input point position, and this position 102 corresponds to the display position 162.

FIG. 3 is a diagram showing an example of the display state on the CRT display screen at the time of registering the gradation curve. In the figure, 164 indicates each input point of the gradation curve registered in the gradation correction table of the memory 13. This is a point table in which input values and output values of gradation density are displayed numerically, and 165 is the point table 164.
This is a gradation curve table in which graphs (supplemented gradation curves to be described later) generated by each numerical value are displayed.

Next, an example of a correction curve input method will be described with reference to FIGS. 1 to 3.

First, the registration number of the gradation curve (gradation curve number 2 in the example of FIG. 3) is input via a keyboard (not shown). Next, after aligning the mouse 10 with a desired position on the dedicated pad 101, that is, a position corresponding to the position of the input point of the gradation curve on the operator's image, an input operation of the mouse 10 is performed. In this manner, the mouse 10 is sequentially moved to follow the gradation curve on the image.

Then, the values (for example, 0.4) of the X and Y coordinate positions on the dedicated pad 101 corresponding to the mouse 100 input point position 102 are transferred to the arithmetic circuit 12 and the memory 1 via the memory.
3, and is also transferred to the display circuit 15.
On the display screen of the OR, T16, the input and output values of the concentration are sequentially displayed as numerical values as shown in the point table 164 in FIG.

On the other hand, the aforementioned X and Y that have been transferred to the arithmetic circuit 12
The value of the coordinate position, that is, the input point of mouse 10 (
Each point data) is interpolated here (e.g. linear interpolation)
This is stored one by one in the gradation correction table of the memory 13 as a supplemented gradation curve.

This complemented gradation curve is sent to c through the display circuit 15.
On the graph display screen 161 of uT 16, a line graph like the gradation curve table 165 in FIG. 3 appears.

In this way, when the operator inputs the gradation curve on the image using the mouse (pointing device) 10,
The input value and output value of the gradation correction density are registered at the same time, and the gradation curve on the image is generated and registered as a concrete gradation curve based on these values, and the generation process is The gradation curve is displayed one by one on the display screen of the CRT display.

Effects of the Invention As is clear from the above description, since the present invention is equipped with a pointing device and a CRT display, the gradation correction curve based on the operator's image is displayed on the display screen of the CI'LT display. Input can be made by simply moving the cursor displayed using a pointing device. Therefore, the operability during input is significantly improved compared to conventional devices.

Also, the gradation correction curve on the input image is CR
Since it is displayed concretely on the T-display screen, you can create the gradation correction curve exactly as you imagine it.
You can draw while viewing it on the display screen of the T-display.
This can be registered.

That is, the present invention has the effect that input confirmation and registration of a gradation correction curve based on an image can be performed simultaneously and easily and quickly.

[Brief Description of the Drawings] Fig. 1 is a schematic block diagram showing an embodiment of the device of the present invention, and Fig. 2 shows the correspondence between the input position of a pointing device and the display position on the display screen of a CRT display. FIG. 3 is a conceptual diagram showing an example of a display state on a CRT display screen during registration of a gradation correction curve, and FIG. 4 is a block diagram showing a schematic configuration of a conventional apparatus. 10... Pointing device (mouse), 10
1... Dedicated bat, 102... Input point position (
X mark) 11...Memory, 12...Arithmetic circuit, 13.
...Memory (gradation correction table), 14...Density conversion circuit, 15...Display circuit, 16...CRT display, 161...CRT display display screen, 1
62... Display position (X mark), 163... Straight line complement part. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 4 Figure 3171

Claims (1)

[Claims] A pointing device for inputting a gradation correction curve, a means for accumulating output position information of this pointing device, and a gradation correction curve supplemented by interpolating between each position information accumulated by this means. 1. A gradation correction curve input device comprising: means for generating and storing and registering the gradation correction curve; and a CRT display for checking the output position information and the supplemented gradation correction curve.