CN100502457C

CN100502457C - Method for filtering color information

Info

Publication number: CN100502457C
Application number: CNB2004100769388A
Authority: CN
Inventors: 王昶元
Original assignee: Teco Image Systems Co Ltd
Current assignee: Teco Image Systems Co Ltd
Priority date: 2004-09-02
Filing date: 2004-09-02
Publication date: 2009-06-17
Anticipated expiration: 2024-09-02
Also published as: CN1744659A

Abstract

Being applied to an image process device, the method is in use for filtering out color information in a location of an object. The method includes following steps: sensing image of multiple self-colored planes; selecting image of self-colored plane corresponding to color information in the location from multiple self-colored planes; adjusting tone scale of the selected image of self-colored plane in order to filter out color information in the location of the object; changing characteristic curve of image of the self-colored plane to adjust degree of darkness in not filtered area of the object.

Description

The method of filtering colour information

Technical field

The method of the relevant a kind of filtering colour information of the present invention refers to a kind of method that is applicable to the filtering colour information of image processor especially.

Background technology

Facsimile machine can be considered a kind of image processor, and it is the mode by communication network, literal on the paper and pattern is sent to another long-range facsimile machine, to reach the purpose of real-time transmission data.

Existing general facsimile machine inside consists predominantly of necessary assemblies such as Charged Coupled Device (CCD), mechanism for automatically feeding paper and analog/digital (A/D) transducer.Its basic operation principles is: the sender puts into mechanism for automatically feeding paper with the file that tendency to develop is sent, drive via mechanism for automatically feeding paper, utilize the image on Charged Coupled Device (CCD) scanning document, Charged Coupled Device (CCD) can detect the light beam that reflects varying strength on the file, and the light beams that difference is strong and weak transfer the analog signal that power differs respectively to, then, make analog signal be sent to the analog/digital signal conversion device, by the analog/digital signal conversion device analog signal conversion is become digital signal, at last, digital signal can be again through coding, compression and modulation are after be sent to the recipient by telephone line, the step that just can finish fax like this.

Usually, may add a cover seal or user on the file may use the pen of non-black to make annotation on file, and the user is when document facsimile is gone out, in the time of may not wishing that the recipient sees seal pattern or annotation content, because the deficiency on the existing facsimile function, contents all on the file still can intactly be sent to the recipient, therefore all be to utilize opaquing fluid or other instrument earlier usually with the content removal of not wanting on the file to allow the recipient see, re-using facsimile machine transmits, so solution is not only lost time but also also the content on the script files may be removed in the lump in removing the seal designs or the process of annotation, and can't satisfy the demand of user in this respect.

Therefore, how to develop a kind of method of improving the filtering colour information of above-mentioned prior art disappearance, real in pressing for the problem of solution at present.

Summary of the invention

Main purpose of the present invention is to provide a kind of method that is applicable to the filtering colour information of image processor, contents all on the file can only be sent to the recipient fully to solve image processor, can't satisfy the seal that the user wishes that the recipient does not see on the file being added a cover or the demand of annotation content, and improve existing solution and lose time and in removing the seal designs or the process of annotation, also the content on the script files may be removed in the lump or the like shortcoming.

For reaching above-mentioned purpose, the method of a kind of filtering colour information according to an aspect of the present invention, it is applicable to image processor, color information in order to the specific region of filtering object, its method comprises the following step: an image of this object of sensing, and this image is divided into a plurality of primary colors flat images; In a plurality of primary colors flat images, select the pairing primary colors flat image of color information with the specific region; Adjust the color range of selected primary colors flat image, with the color information of the specific region of filtering object; And the characteristic curve that changes the primary colors flat image, to adjust object not by the deep or light degree of the image in filtering zone.

According to conception of the present invention, wherein this image processor is facsimile machine, scanner or photocopier.

According to conception of the present invention, wherein a plurality of primary colors flat images are by sensing component object to be carried out the sensing gained.

According to conception of the present invention, wherein sensing component is Charged Coupled Device (CCD), and it is arranged in the image processor.

According to conception of the present invention, wherein a plurality of primary colors flat images comprise red flat image, blue color planes image and green color plane image.

The method of a kind of filtering colour information according to a further aspect of the invention, it is applicable to image processor, in order to the color information of the specific region of filtering object, its method comprises the following step: a plurality of primary colors flat images of its object of sensing; In a plurality of primary colors flat images, select the primary colors flat image corresponding with the color information of specific region; And the color range of adjusting selected primary colors flat image, with the color information of the specific region of filtering object.

For clearer understanding purpose of the present invention, characteristics and advantage, preferred embodiment of the present invention is specifically described below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the flow chart of method of the filtering colour information of preferred embodiment of the present invention.

Fig. 2 (a) is the waveform schematic diagram of the red flat image of Charged Coupled Device institute sensing file shown in Figure 1.

Fig. 2 (b) is the waveform schematic diagram of adjusting after the color range of the red flat image shown in Fig. 2 (a).

Fig. 2 (c) is the waveform schematic diagram of adjusting behind the characteristic curve of the red flat image shown in Fig. 2 (b).

Embodiment

Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different aspects, its neither departing from the scope of the present invention, and explanation wherein and icon be when the usefulness that explain in itself, but not in order to restriction the present invention.

The method of filtering colour information of the present invention is applicable to facsimile machine, scanner or photocopier, and the certainly general common on the market image processor with sensing component also can be used technology of the present invention.

See also Fig. 1, it is the flow chart of method of the filtering colour information of preferred embodiment of the present invention.Flow process shown in the present embodiment is applicable to the method for the filtering colour information of facsimile machine (not shown), mainly in order to will add a cover redness or other color seal and to have the file of different colours font and pattern, in the process of document image fax, perhaps do not want that by method of the present invention the font and the pattern that present remove in seal, make the recipient can't see filtering seal, the content of literal and pattern, its steps flow chart is: at first, utilization is arranged at the image of Charged Coupled Device (CCD) the sensing file to be measured of facsimile machine inside, because the Charged Coupled Device (not shown) of present embodiment is built-in redness (R), the transducer (sensor) of green (G) and blue (B) three looks, therefore the image of this document can be divided into corresponding to R, the trichromatic flat image of G and B, make in each primary colors flat image only to comprise corresponding monochrome information, only comprise red information in the promptly red flat image, only comprise green information in the green color plane image and only comprise blue information (step S11) in the blue color planes image.Then, in R, G and the trichromatic flat image of B, select the pairing primary colors flat image of color information (step S12) with the specific region of desiring filtering, because present embodiment is in order to the content of adding a cover red seal on the file is eliminated, therefore needed to select red flat image (shown in Fig. 2 (a)).

Please cooperate with reference to Fig. 2 (a), it is the waveform schematic diagram of the red flat image of Charged Coupled Device institute sensing this document.As shown in the figure, the input of this redness flat image and output levels system are divided into 256 rank, i.e. 0～255 rank, when the color range of input image is 0, the composition of the redness of expression input image is maximum, and the image of corresponding output be white, therefore the recipient that faxes can't see the content of this input image, the composition of redness of representing to import image when the color range of input image when being 255 is minimum, and the image of corresponding output be black, therefore the recipient that faxes it will be appreciated that the content of this input image, but the mode of definition is as limit, and common different image processor has different definition.Therefore for the most weak, promptly the color range value is minimum in the intensity on red plane for the sensed image that arrives in red seal zone on the file, and certainly, green and blue color planes image also have identical principle.In some embodiment, the color range of the regional institute sensing of red seal is 40 on the file, and the color range value of other non-red area then is higher than 40.

Please consult Fig. 1 again, after step S12, need to adjust the color range of selected red flat image, be about to the color range value and be 0～40 input image and be adjusted into 0, to make that so the image output in red seal zone is white (shown in Fig. 2 (b)), the content filtering (step S13) of the seal that file can be added a cover on the file.

Because behind step S13, literal and/or its output concentration of pattern of on the file originally being non-red area can be thin out, please consult again Fig. 2 (a) and (b) shown in the waveform schematic diagram, the input image of color range shown in Fig. 2 (b) between 40～255, the color range of its corresponding image output, compare with the waveform shown in Fig. 2 (a), because after step S13 adjustment color range, the color range of Fig. 2 (b) image output will reduce, to make that so the concentration of image output is thin out, in order to make the recipient can receive clearly file content, need be by the characteristic curve (shown in Fig. 2 (C)) that changes the red flat image of having adjusted color range, in order to adjust file, make the genuine file content of tendency to develop recall to concentration (step S14) originally not by the concentration of the literal in filtering zone.

Thus, the fax recipient just can not see the content of seal, and fax literal concentration in the past can not change yet, and common file for example: official document, what need is the information of literal, the words of color then secondly, and less the supports colour of most facsimile machine, therefore can utilize method of the present invention that the content of seal is eliminated, simultaneously the color of literal with black and white be presented.In addition, since the user only need by the button that is arranged at facsimile machine select R, G and B three primary colors wherein one flat image and adjust its characteristic zone, but accept and believe the concentration of breath and adjustment literal with regard to the look of specific region on the filtering file, the suitable convenience that operates reaches fast, more can keep the integrality of original content.

Certainly, the method for filtering colour information of the present invention is not limited to the seal content of being added a cover on the filtering file, so long as the literal of non-black or pattern all can use method of the present invention filtering in addition in the image processing process on the file.

Indulge the above, the method of filtering colour information of the present invention is to be applicable to image processor, by adjusting the color information that one of them color range of R, G, B three primary colors flat image is come the specific region of filtering sensed object, thus, the fax recipient just can not see the content of specific region, and adjust the concentration of literal after the adjustment color range by the characteristic curve that changes the primary colors flat image, make the file content of fax recall to concentration originally.In addition, the user can select the primary colors flat image and adjust its characteristic zone by the button of facsimile machine, and the suitable convenience that operates reaches fast, more can keep the integrality of original content.Therefore, the method for filtering colour information of the present invention has the value of industry.

Claims

1. the method for a filtering colour information, it is applicable to an image processor, in order to the color information of a specific region of filtering one object, this method comprises the following step:

One image of this object of sensing, and this image is divided into a plurality of primary colors flat images;

In these a plurality of primary colors flat images, select the pairing primary colors flat image of color information with this specific region; And

Adjust the color range of selected this primary colors flat image, with the color information of this specific region of this object of filtering.

2. the method for filtering colour information as claimed in claim 1 is characterized in that this image processor is a facsimile machine, one scan instrument or a photocopier.

3. the method for filtering colour information as claimed in claim 1, it is characterized in that these a plurality of primary colors flat images are by a sensing component this object to be carried out the sensing gained, and this sensing component is a Charged Coupled Device, and it is arranged in this image processor.

4. the method for filtering colour information as claimed in claim 1 is characterized in that these a plurality of primary colors flat images comprise a red flat image, a blue color planes image and a green color plane image.

5. the method for filtering colour information as claimed in claim 1 is characterized in that this to liking a file, and its surface has literal and/or pattern.

6. the method for filtering colour information as claimed in claim 1 is characterized in that adjusting and also comprises step after the color range of selected this primary colors flat image:

Change the characteristic curve of this primary colors flat image, to adjust this object not by the deep or light degree of the image in filtering zone.