JPH07262307A - Recognized result display method and display controller - Google Patents

Abstract

PURPOSE:To provide the display controller, for which the burden for the confirming processing of the displayed recognized result is reduced and the precision of confirmation is improved, for flexibly dealing with the confirming processing corresponding to the conditions concerning the device for displaying the recognized result due to prescribed recognition processing on a display means together with the degree of certainty (reliability). CONSTITUTION:This display controller 1 detects the degree of certainty from the recognized result possessed from a recognition processor 2 by using a certainty degree detection part 11. A control parameter decision part 12 decides a control parameter so that the more the detected degree of certainty is increased, the more any one of emitted light intensity, color concentration and character line thickness can be stepwise increased at least. This control parameter uniquely decides the display control conditions of a display device 3 and while using this control parameter, the display device 3 changes the display conditions of the recognized result corresponding to the stage of the certainty degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for displaying a recognition processing result, and more particularly to a method for displaying a recognition result together with a certainty factor for the recognition result, and a display control device for realizing this method.

[0002]

2. Description of the Related Art In general, machine recognition processing is performed only according to a certain algorithm, and therefore there is a possibility that an incorrect recognition result may be output for an input that was not assumed when designing the algorithm. . For example, it is difficult to achieve a recognition rate of 100% in character recognition, and it is theoretically almost impossible to eliminate erroneous recognition when recognizing handwritten characters. Further, even when performing recognition processing such as translating a foreign language into Japanese by machine translation, erroneous recognition due to misspellings in the original sentence or colloquial expressions that do not fit in the grammar cannot be avoided.

Therefore, processing or work for confirming the presence or absence of erroneous recognition (hereinafter, confirmation processing) is required. In this case, it is inefficient to perform the confirmation process on all the recognition results, and the amount of work is particularly large when there are many recognition results. Therefore, there is a demand for a technique that, when a recognition result is output, displays a certainty factor for the recognition result and can perform a confirmation process by narrowing the target to the one having a low certainty factor.

As such a conventional technique, for example, the recognition process is performed by using the distance between each vector in the recognition process using the distance of the category space field between the feature vector and the reference vector and the certainty factor of the algorithm including the reject process as parameters. There is known a technique for generating a certainty factor in.
In such a technique, the display method for outputting the recognition result to a display or the like is changed depending on whether the value of the certainty factor in the recognition process is higher or lower than a certain threshold value.
For example, for a character having a certainty factor lower than a threshold value, a method of changing its display color to a color different from that of a character having a high certainty factor and a technique of inverting the display are known.

[0005]

According to the above-mentioned prior art, since the confirmation processing can be limitedly performed on the different color portion or the reversed portion, the confirmation processing is somewhat reduced. However, in the case of actually performing the confirmation processing, there are cases where information about the characteristics of the recognition target and the reliability required for the recognition result after erroneous recognition correction is required. It is not possible to obtain information that spans.

Further, for example, when a recognition result is displayed on a display or the like and a person performs a confirmation process, the confirmation process is not performed for a slight erroneous recognition, but only a recognition result for which there is a high need is obtained. By performing the confirmation process, it may be required to reduce the time required for the confirmation process as much as possible.
However, in the recognition result display technology according to the above-mentioned conventional technology,
Such a flexible response has been difficult.

The present invention has been made on the basis of the above background, and reduces the burden required for the confirmation processing for the recognition result, improves the confirmation accuracy, and enables flexible response according to the situation. It is intended to provide a result display method. Another object of the present invention is to provide a display control device for realizing the recognition result display method.

[0008]

In order to solve the above-mentioned problems, the present invention is a method of displaying a recognition result by a predetermined recognition process on a display means together with a certainty factor indicating the reliability thereof. A step of determining at least three ranks for the certainty factor, determining a control parameter for making the display mode different for each rank, and obtaining the corresponding certainty factor from the recognition result, and setting the obtained certainty factor as the rank. A step of deriving a corresponding control parameter and a step of guiding the derived control parameter to the display means together with the recognition result, and a display mode of the recognition result according to a display control uniquely determined by the control parameter. The feature is that they are different. The control parameter is, for example, a parameter that uniquely determines at least one kind of display control mode among display density, light emission intensity, and display line segment thickness in the display means.

The display control device provided by the present invention is
A device for displaying the recognition result by a predetermined recognition process on a display means together with at least three levels of confidence indicating the reliability thereof, and a plurality of control parameters for varying the display mode for each level of the certainty. Control parameter storage means for storing, confidence factor detection means for detecting the confidence level from the recognition result, and control parameters corresponding to the determined confidence level of the confidence level are selectively extracted from the control parameter storage means and displayed. And a control parameter determining means for guiding the means.

In the display control device having the above structure, the control parameter storage means stores, for example, a control parameter that uniquely defines at least one display control mode among display density, emission intensity, and thickness of display line segment in the display means. It will be stored.

[0011]

In the recognition result display method of the present invention, the control parameters are associated with the ranks of the certainty factor that are determined in advance. Then, the control parameter is determined according to the acquired confidence level, and this is guided to the display means together with the recognition result. Since the control parameter uniquely defines the display control mode of the display means, the recognition result is displayed in a different display mode depending on the control parameter. In this case, by setting a large number of ranks, the display mode becomes multifaceted, and the certainty factor can be identified with higher accuracy.

Particularly, when the recognition result is displayed on a display or the like by light emission, the confidence level can be easily controlled by controlling the light emission intensity, color density, display line thickness, etc. in the light emission display of the recognition result. Are identified.

In the display control device of the present invention, the certainty factor detecting means determines the certainty factor (rank) from the recognition result.
Is detected and guided to the control parameter determination means. The control parameter determining means selectively extracts and displays a control parameter corresponding to the detected certainty factor, for example, a control parameter that uniquely defines at least one kind of display control mode among display density, emission intensity, and thickness of display line segment. Lead to means. The display means
The recognition result is displayed based on this control parameter.

[0014]

[Example] In the following, character recognition is taken as an example of recognition processing,
Embodiments of the present invention will be described in detail with reference to the drawings. Figure 1
1 is a block diagram of an embodiment of the present invention, 1 is a display control device, 2 is a recognition processing device, and 3 is a display device having a display. The display control device 1 is a device that causes the display device 3 to display a predetermined recognition result sent from the recognition processing device 2 together with its certainty factor, and includes a certainty factor detection unit 11, a control parameter determination unit 12, and a plurality of parameters. It comprises a parameter storage unit 13 arranged in a table and a font storage unit 14 storing a plurality of fonts (character forms).

FIG. 2 is a flow chart of the recognition result display method in this embodiment, and S indicates a processing step. Note that the certainty factor in this embodiment is a numerical representation of the probability of correctly recognizing the recognition target in each recognition algorithm, and the higher the probability of correct recognition (that is, the lower the probability of false recognition), the greater the value. If the probability of correct recognition is low (that is, the probability of false recognition is high), the value becomes small. Therefore, four ranks are determined according to the value. For example, it is assumed that the rank "1" has a very high probability of erroneous recognition, and the probability of erroneous recognition becomes lower as the rank increases like ranks "2" to "4".

Next, the processing contents of the display control device 1 will be described with reference to FIGS. 1 and 2. The certainty factor detection unit 11 detects the certainty factor from the predetermined recognition result information derived from the recognition processing device 2 (S1). The certainty factor depends on the recognition algorithm, the recognition target, and the like on the recognition processing device 2 side, but the type thereof does not matter here.

The control parameter determination unit 12 performs the following processing. First, the display control table in the parameter storage unit 13 is selected, and by referring to this display control table, it is detected whether or not the certainty factor is a value corresponding to the rank "1" (S2). When the certainty factor is rank "1", it is determined to perform the unidentifiable process (S3), and the result is output to the display device 3. As the unidentifiable process at this time, for example, a mark “?” (Reference numeral 504 in FIG. 5) indicating unrecognizable is displayed on the display device 3 instead of the character as the recognition result. In other cases, the control parameter corresponding to the confidence rank is determined (S4).

It is possible to prepare a plurality of types of control parameters, for example, multi-step brightness, multi-step color density, multi-step character line (display line segment) thickness, and the like. In this case, a display control table in which each control parameter is arranged in advance in association with a certainty factor rank is used as a parameter storage unit 1.
Store in 3. In this embodiment, the emission intensity, color density,
And a display control table for controlling the thickness of character lines are stored. First control parameter to control emission intensity
FIG. 3 shows an example of the contents of the display control table for setting the certainty factor and the first parameter as parameters. In this example, the minimum value of the certainty factor is PS and the maximum value is PE, and the certainty factor values are ranked by the values of i1 to in. At this time, the rank is set such that the false recognition rate decreases as the rank value increases.

The minimum value of the emission intensity is QS and the maximum value is QE, and the first parameter is associated with each rank so that the emission intensity increases as the certainty increases. In this example, the emission intensity value is set to increase as the certainty factor increases, but the correlation between the certainty factor and the emission intensity value can be arbitrarily determined. For example, the emission intensity value may increase as the certainty factor decreases. The same applies to other parameters.

Similarly, tables corresponding to the second parameter and the third parameter for controlling the color density and the thickness of the character line are similarly created and stored. When associating the certainty factor with the color density, it is convenient to create a table for each color in order to control the density of each of the three primary colors of light, red, green and blue. Further, when displaying a character with a higher certainty factor, a display control table is created by arranging parameters that are visually strongly recognized. With this, the emission intensity increases as the certainty increases,
It is possible to increase the color density or thicken the character line.

In this example, the thickness of the character line is also used as a parameter, but a normal display device prepares a plurality of character patterns (fonts) having different character line thicknesses for one character. Not necessarily. Therefore, in this embodiment,
A font corresponding to the thickness of each character line is prepared in a bitmap format, and a font table for designating a font for each character according to the thickness of the character line is stored in advance in the font storage unit 14. Then, a desired font table is detected from the font storage unit 14, and the font table corresponding to the thickness of the character line obtained in S4 is determined by referring to the detected font table (S5).

FIG. 4 shows an example of the contents of this font table. In FIG. 4, font sets 1 to m indicate arbitrary font sets having different character line thicknesses. This table is used to determine the font set corresponding to the character thickness parameter obtained in S4. Then, each recognized character is output together with the corresponding control parameter (S6).
If the designated font does not exist in the display device 3, the font itself can be output to the display device 3.

FIG. 5 shows an example of character display on the display device 3 controlled by the display control device 1. In this example, the certainty factor is indicated by the thickness of the character line or the character type. In FIG. 5, 501 to 503 are display examples of fonts for the recognition character “i”, and 504 is a display example of unrecognizable marks. Since the character line of the font 501 is thick, it indicates that the certainty factor was high. Font 5
02 indicates that the certainty factor is low because the character line is thin, and the font 503 indicates that the certainty factor is medium because the character line is medium compared to the above fonts. Further, 504 is an unrecognizable display mark as described above, which indicates that the certainty factor was extremely low. In either case, the certainty factor can be visually recognized immediately.

Although the example of the character recognition processing has been described in the present embodiment, it goes without saying that the present invention can be similarly applied to other recognition processing.

In this embodiment, the certainty factor is ranked in four stages, and the emission intensity and the like are changed stepwise according to each rank. However, the number of ranks may be three stages or more. Therefore, the number of steps is not restricted. In particular, as the number of ranks increases, the certainty factor can be grasped in a more multifaceted manner, so that it is possible to more accurately identify the certainty factor. Further, if the number of ranks is increased as much as possible, finally the light emission intensity will smoothly change according to the certainty factor. Therefore, even a process in which the confidence factor and the light emission intensity are smoothly changed without performing the ranking can be grasped as the infinitely ranked state.

Further, in the above embodiment, a single type of certainty factor is used. However, a plurality of types of certainty factors are expressed for each factor that produces the certainty factor on the recognition processing device side, and based on these multiple types of certainty factors. You may perform multifaceted processing. For example, when the translation process is performed as the recognition process, the certainty factor regarding the grammatical factor is the first certainty factor, and the certainty factor regarding the selection of the translated word is the second certainty factor. Then, for the first certainty factor, the display color is determined by referring to the parameter table relating to the color density, and for the second certainty factor, the parameter table relating to the thickness of the character line is referred to and the thickness of the character line is determined. The display is determined. With such a configuration, it is possible to confirm the certainty factor regarding the grammatical factor and the certainty factor regarding the selection of the translated word during the confirmation process, and it is possible to perform the confirmation process with high accuracy.

[0027]

As described in detail above, according to the present invention, it is possible to visually identify at least three levels of certainty during the recognition result confirmation processing.
Further, this also makes it possible to improve the accuracy of the confirmation processing. Furthermore, since it is easy to change the display mode according to the situation, it is possible to deal with the situation flexibly. For example, according to the present invention, it is possible to perform the confirmation processing intensively only on the recognition result having a low certainty factor or only on the certainty factor of a predetermined rank.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a recognition result display device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a recognition result display method according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an example of contents of a display parameter table.

FIG. 4 is an explanatory diagram showing an example of contents of a font table.

FIG. 5 is an explanatory diagram of a display state of a recognition result.

[Description of Reference Signs] 1 display control device 11 certainty factor detection unit 12 display processing determination unit 13 parameter table storage unit 14 character pattern table storage unit 2 recognition processing device 3 display device

Claims (4)

[Claims] 1. A method of displaying a recognition result by a predetermined recognition process on a display unit together with a certainty factor representing the reliability thereof, wherein at least three ranks of the certainty factor are determined in advance and displayed for each rank. Determining a control parameter for differentiating modes, obtaining a certainty factor from the recognition result, and deriving a control parameter corresponding to the rank of the obtained certainty factor; And a step of guiding the recognition result together with the recognition result, wherein the display mode of the recognition result is changed according to the display control uniquely determined by the control parameter. 2. The recognition result display method according to claim 1, wherein the control parameter is a display density on the display means,
A recognition result display method, wherein the recognition result display parameter is a parameter that uniquely determines at least one display control mode among the emission intensity and the thickness of the display line segment. 3. A device for displaying the recognition result of a predetermined recognition process on a display means together with at least three levels of confidence indicating the reliability thereof, wherein the display mode is different for each level of the certainty. Control parameter storage means for storing a plurality of control parameters, confidence factor detection means for detecting the confidence level from the recognition result, and control parameter corresponding to the determined confidence level of the selected level from the control parameter storage means And a control parameter determining unit for extracting and guiding the display unit to the display unit. 4. The display control device according to claim 3, wherein the control parameter storage unit uniquely determines at least one display control mode among display density, emission intensity, and display line segment thickness in the display unit. A display control device characterized by storing control parameters.