CN1581917A - Correction method of output image parameters - Google Patents

Abstract

An output image correction method and system thereof are used for correcting an output parameter set. The output image correction method is that the first reference image file containing the first reference content data is output as the reference correction photo through the output device. And then, carrying out a white balance procedure on the digital image acquisition device under the environment of a specific light source. Then, under the environment of the specific light source, the digital image capturing device is used for capturing the reference calibration picture to form a second reference image file which contains second reference content data. The first reference content data is compared with the second reference content data to obtain a plurality of parameter comparison values. The parameter comparison value obtains a plurality of correction parameter values through a predetermined program, and updates the output parameter group according to the correction parameter values. Finally, the updated output parameter group is stored in the digital image capturing device, and when at least one subsequent image file is generated, the corrected output parameter group is added to the header area of the subsequent image file.

Description

The bearing calibration of output image parameter

Technical field

The present invention relates to a kind of output parameter bearing calibration and system thereof,, particularly relate to a kind of output parameter bearing calibration and system thereof and be stored in a output parameter group in the digital image capture apparatus in order to correction in order to proofread and correct an output parameter group.

Background technology

Along with being in fashion of digital photo, printer that can the printing color photograph is also flourish thereupon.Yet; present photochrome printer of a great variety on the market; but it is all inequality that the color of each label printer is set; and printer manufactory is different from digital camera manufacturer usually, so that the user utilizes regular meeting between photochrome that printer prints comes out and the digital image file originally the difference of chroma and brightness to occur.

See also Fig. 1.Fig. 1 is known image file 10 data configuration schematic diagrames.File data shown in Figure 1 is the jpeg format in the digital image format.Jpeg format is that the file data of each image file 10 is divided into header area 12 and image data area 14.The capturing images information of header area 12 store digital image files 10.Image data area 14 is in order to the store images data.

Capturing images information includes the EXIF information that writes down with EXIF form (EXchangeable Image File Format).EXIF is that digital camera is when it stores jpeg file, some information that added, purpose be used for the document image aperture in when acquisition, shutter, ISO, date etc. various with the relevant message of photography prevailing condition, to indicate follow-up digital image file user.

For improving the problem of known technology, part printer manufacturer cooperates with digital camera manufacturer respectively, has worked out the correction parameter group of some digital image file outputs, the usefulness of proofreading and correct when an output device output digital image file is provided.

In the known technology, this correction parameter group is stored in the capturing images information of header area 12 of each digital image file, is right after after the EXIF.The application process of known correction parameter group has two kinds.First kind is before each digital image file exports printer to, allows the user adjust the correction parameter group on personal computer, and printer is exported according to this to reach the in the eyes of ideal effect of user again.Second kind be the correction parameter group that each printer is desirable to be stored in a digital image capture apparatus in advance be in the digital camera, be additional in the header area 12 when being provided in each capturing images, make follow-up printer obtain correct digital picture output.

Yet, the correction parameter group application process of known technology, first kind must be carried out corresponding adjustment through personal computer, just can obtain desirable correction parameter group.If run into the situation that does not have personal computer, the output quality of digital picture will be restricted.In addition, carry out the adjustment of correction parameter group, the inconvenience in the time of will bringing output image to the user at each digital image file.The problem of second kind of application process is, because the correction parameter group is a default value, thereby digital camera can't adjust its correction parameter group automatically according to the type of printer that the user had, and reaches the optimal printing state of this printer.

Therefore, main purpose of the present invention is to provide a kind of parameter calibration system and method thereof, when printing digital image file to improve, and discrepant problem between print quality and the digital image file.

Summary of the invention

The invention provides a kind of parameter calibration system and method thereof, in order to solve the problem of known technology.

The invention provides a kind of parameter calibration system and method thereof, be stored in the digital image capture apparatus for an output parameter group that is additional to an image file in order to correction.

The invention provides a kind of parameter calibration system and method thereof, required a plurality of parameters when its this output parameter group of proofreading and correct is exported this image file in order to an output device to be provided.

Store one first reference picture file in this digital image capture apparatus, this first reference picture file comprises this output parameter group and one first reference content data.Output image bearing calibration of the present invention is earlier this first reference picture file to be output into one with reference to proofreading and correct photograph via this output device.Then under a specific light source environment, this digital image capture apparatus is carried out a white balance program.Under this specific light source environment, utilize this digital image capture apparatus that this is carried out capturing images with reference to proofreading and correct photograph again, include one second reference content data to form one second reference picture file.Relatively these first reference content data and this second reference content data are to obtain a plurality of parameter comparison values.Described parameter comparison value draws a plurality of correction parameter values via a preset program, and upgrades this output parameter group according to this.At last, store output parameter group after this renewal in this digital image capture apparatus, and when at least one subsequent image file produces, additional this output parameter group after proofreading and correct is in the header area of described subsequent image file.

By the present invention, the user can proofread and correct with parameter correcting method of the present invention the digital camera that is had voluntarily in advance directly by the operation-interface of digital camera, obtains the output parameter group between digital camera own and the printer.Digital camera is when follow-up acquisition image, output parameter group after additional automatically this correction of meeting, promptly this digital camera to the best output parameter group of this printer on the header area of each image file, and when printing digital image file, apply mechanically, make this printer obtain best digital picture print quality with respect to this digital camera.

Can describe in detail and appended graphic being further understood by following execution mode about the advantages and spirit of the present invention.

Description of drawings

Fig. 1 is a known image file data configuration schematic diagram;

Fig. 2 proofreaies and correct the photograph schematic diagram according to the reference of the embodiment of the invention;

Fig. 3 carries out white balance program schematic diagram for digital image capture apparatus of the present invention;

Fig. 4 forms the second reference picture file schematic diagram for digital image capture apparatus of the present invention;

Fig. 5 is for using the digital image capture apparatus schematic diagram of parameter calibration system of the present invention; With

Fig. 6 is the flow chart of steps of parameter correcting method of the present invention.

The drawing reference numeral explanation

10: image file 12: header area

14: image data area 15: with reference to proofreading and correct photograph

16: red area 17: green area

18: blue region 19: gray-scale areas

20: digital image capture apparatus 22:LCD screen

25: the second reference picture files 65: blank sheet of paper

30: parameter calibration system 32: memory

34: capturing images module 35: the parameter correction table of comparisons

36: correction module

Embodiment

The invention provides a kind of parameter calibration system, be applied to a digital image capture apparatus as in the digital camera, to proofread and correct an output parameter group.This output parameter group is stored in this digital image capture apparatus for being additional to an image file.Store one first reference picture file in this digital image capture apparatus, this first reference picture file comprises this output parameter group and one first reference content data, and is output into one with reference to proofreading and correct photograph via this output device.

See also Fig. 2.Fig. 2 proofreaies and correct photograph 15 schematic diagrames according to the reference of the embodiment of the invention.With reference to proofreading and correct photograph 15 are these first reference content data of output, comprise a red area 16, a green area 17, a blue region 18 and at least one gray-scale areas 19.The present invention utilizes this digital image capture apparatus to carrying out capturing images with reference to proofreading and correct photograph 15, to form one second reference picture file, comprises one second reference content data in it.The present invention will be further relatively these first reference content data and this second reference content data, obtaining a plurality of parameter comparison values, and draw a plurality of correction parameter values via a preset program according to described parameter comparison value.

Described correction parameter values is in order to upgrading an output device such as color printer etc., required this output parameter group when exporting this image file.As shown in Figure 1, image file 10 comprises a header area 12 (Header) in order to storing this output parameter group, and it will be applied mechanically when follow-up output device output image file.

Really enter in the present invention before the operation of parameter correction, should carry out a white balance program earlier.Known white balance program is a digital camera in order at a different ambient light brightness, carries out the program technic that the digital camera primary colours are proofreaied and correct.Its main purpose is to carry out ambient brightness and proofreaies and correct.Measure and obtain relevant parameter by colour temperature and brightness value, and then when the parameter correction step, consider the parameter of this relevant source environment, make output parameter of the present invention not be subjected to the factor affecting of ambient light brightness and change a specific light source environment.

See also Fig. 3.Fig. 3 carries out white balance program schematic diagram for digitalimage capture apparatus 20 of the present invention.Digitalimage capture apparatus 20 is to have two incandescent sources 62,64 respectively in relative direction one, to press from both sides under the specific light source environment of 45 angular illumination one blank sheet of paper 65 of spending with horizontal direction, with vertical angle one blank sheet of paper is carried out capturing images, carrying out ambient brightness proofreaies and correct, and obtain the colour temperature of relevant this specific light source environment and the relevant parameter of brightness, as the reference of subsequent step of the present invention.

See also Fig. 4.Fig. 4 forms the second reference picture file, 25 schematic diagrames for digitalimage capture apparatus 20 of the present invention.After the white balance EP (end of program) of Fig. 3, then in digitalimage capture apparatus 20, form this second reference picture file 25.Fig. 4 when showing digitalimage capture apparatus 20 and acquisition image thereof, is presented on the image on the lcd screen 22.Under this specific light source environment, will be placed on former blank sheet of paper 65 lay down locations with reference to proofreading and correct photograph 15, at this moment, these first reference content data can be presented at earlier on the lcd screen 22, and described redness, green and blue region are represented with solid line on Fig. 4.Then proofread and correct photograph 15 with 20 pairs of references of digital image capture apparatus and carry out capturing images, also can be presented at lcd screen 22 on reference to the image of proofreading and correct photograph 15 this moment, and the frame line of its described redness, green and blue region is represented by dotted lines on Fig. 4.The first reference content data and reference correction photograph 15 shown on lcd screen 22 overlap fully, and solid line shown in Figure 4 and dotted line are overlapped, and press shutter again and capture the second reference picture file 25 to obtain the second reference content data.By this, digitalimage capture apparatus 20 can be under identical lighting environment condition, relatively these first reference content data and this second reference content data, learn the output photograph of output device and digitalimage capture apparatus 20 image file difference why.

See also Fig. 5.Fig. 5 is the schematic diagram of the digitalimage capture apparatus 20 of applicationparameter calibration system 30 of the present invention.This parameter calibration system comprises amemory 32, a capturingimages module 34, a parameter correction table ofcomparisons 35 and a correction module 36.Memory 32 is in order to store this output parameter group.Capturingimages module 34 is in order to carrying out a white balance program to digital image capture apparatus under a specific light source environment, and under this specific light source environment to carrying out capturing images to form one second reference picture file with reference to proofreading and correct photograph 15.

36 of correction modules obtain described parameter comparison value, and draw a plurality of correction parameter values according to described parameter comparison value via a preset program in order to relatively these first reference content data and this second reference contentdata.Correction module 36 upgrades this output parameter group further according to described correction parameter values, and stores output parameter group after this renewal in digital image capture apparatus 20.This preset program is to proofread and correct the table ofcomparisons 35 with described parameter comparison value query argument, and correspondence obtains described correction parameter values.

The parameter correction table ofcomparisons 35 includes the correction parameter of numerous species, for example divides other chroma, brightness to red, green and blue three looks, and the GTG expressivity of each color or the like.

Promote the practice of correction parameter group according to known printer manufacturer, printer manufacturer provides contrast formula between described correction parameter values and actual printer output parameter to digital camera manufacturer.Then digital camera is able to by described correction parameter values and this contrast formula, adjusts the suitableeest output obtain being specific between this digital camera and the printer with reference to figure.When digital camera output subsequent image file, the data of this image file be to should the suitableeest output doing corresponding output with reference to figure, and the best in quality when obtaining this printer prints photochrome.

See also Fig. 6.Fig. 6 is the flow chart of steps of parameter correcting method of the present invention.The inventive method comprises the following step:

Step S40: beginning;

Step S42: this first reference picture file is output into one with reference to proofreading and correct photograph via this output device;

Step S44: under a specific light source environment, digitalimage capture apparatus 20 is carried out a white balance program;

Step S46: under this specific light source environment, to carrying out capturing images, to obtain one second reference content data with reference to proofreading and correct photograph 15;

Step S48: relatively these first reference content data and this second reference content data are to obtain a plurality of parameter comparison values;

Step S50: inquire about this parameter correction table of comparisons with described parameter comparison value, correspondence obtains described correction parameter values;

Step S52:, upgrade this output parameter group according to described correction parameter values;

Step S54: store output parameter group after this renewal in digitalimage capture apparatus 20;

Step S56: when at least one subsequent image file produced, the output parameter group after additional this correction was in the header area 12 of described subsequent image file;

Step S58: finish.

By the present invention, the user can proofread and correct with parameter correcting method of the present invention the digital camera that is had voluntarily in advance directly by the operation-interface of digital camera, obtains the output parameter group between digital camera own and the printer.Digital camera is when follow-up acquisition image, output parameter group after additional automatically this correction of meeting, promptly this digital camera to the best output parameter group of this printer on the header area of each image file, and when printing digital image file, apply mechanically, make this printer obtain best digital picture print quality with respect to this digital camera.

Compared to known technology, output image bearing calibration of the present invention is earlier this first reference picture file to be output into one with reference to proofreading and correct photograph via this output device.Then under a specific light source environment, this digital image capture apparatus is carried out a white balance program.Then under this specific light source environment, utilize this digital image capture apparatus that this is carried out capturing images with reference to proofreading and correct photograph, include one second reference content data to form one second reference picture file.Relatively these first reference content data and this second reference content data are to obtain a plurality of parameter comparison values.Described parameter comparison value draws a plurality of correction parameter values via a preset program, and upgrades this output parameter group according to this.At last, store output parameter group after this renewal in this digital image capture apparatus, and when at least one subsequent image file produces, additional this output parameter group after proofreading and correct is in the header area of described subsequent image file.

By this, the print quality the when user of digital camera and printer need not adjust its printer prints image file by personal computer again, making directly to connect digital camera and obtain the optimal printing quality with printer becomes possibility.In addition, the present invention is with the corrective system of digital camera inside and method, further broken through printer and often come from the restriction of different manufacturers, and obtained the best output parameter of digital camera, the usefulness of each printer of optimization at each printer with digital camera.

By the above detailed description of preferred embodiments, be to wish to know more to describe feature of the present invention and spirit, and be not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category of claim of being arranged in of various changes and tool equality institute of the present invention desire application.

Claims (16)

Translated fromChinese

1.一种输出图像参数校正方法，用以校正一输出参数组，其储存于一数字图像撷取装置中以供附加于一图像文件，该输出参数组提供一输出装置输出该图像文件时所需的多个参数，该图像文件包含一标题区用以储存该输出参数组，以及一图像数据区用以储存一图像内容数据，该数字图像撷取装置内储存有一第一参考图像文件，该第一参考图像文件包含该输出参数组以及一第一参考内容数据，该输出图像参数校正方法包含下列步骤：1. A method for correcting output image parameters, used for correcting an output parameter set stored in a digital image capture device for attaching to an image file, the output parameter set provides an output device outputting the image file Multiple parameters required, the image file includes a header area for storing the output parameter set, and an image data area for storing an image content data, a first reference image file is stored in the digital image capture device, the The first reference image file includes the output parameter set and a first reference content data, and the output image parameter correction method includes the following steps:将该第一参考图像文件经由该输出装置输出成一参考校正相片；outputting the first reference image file as a reference calibration photo via the output device;在一特定光源环境下对该数字图像撷取装置进行一白平衡程序；performing a white balance procedure on the digital image capture device under a specific light source environment;在该特定光源环境下，利用该数字图像撷取装置对该参考校正相片进行图像撷取，以形成一第二参考图像文件，内包含一第二参考内容数据；Under the specific light source environment, use the digital image capture device to capture the reference calibration photo to form a second reference image file, which contains a second reference content data;比较该第一参考内容数据与该第二参考内容数据以获得多个参数比较值；comparing the first reference content data with the second reference content data to obtain a plurality of parameter comparison values;根据所述参数比较值经由一预定程序得出多个校正参数值；Obtaining a plurality of correction parameter values through a predetermined procedure according to the parameter comparison value;根据所述校正参数值，更新该输出参数组；以及updating the set of output parameters according to the correction parameter value; and储存该更新后的输出参数组于该数字图像撷取装置，并在至少一后续图像文件产生时，附加该校正后的输出参数组于所述后续图像文件的标题区中。The updated output parameter set is stored in the digital image capture device, and when at least one subsequent image file is generated, the corrected output parameter set is added to the header area of the subsequent image file.2.如权利要求1所述的输出参数校正方法，其中该数字图像撷取装置内储存有一参数校正对照表，该预定程序是以所述参数比较值查询该参数校正对照表，对应得到所述校正参数值。2. The output parameter correction method as claimed in claim 1, wherein a parameter correction comparison table is stored in the digital image capture device, and the predetermined procedure is to query the parameter correction comparison table with the parameter comparison value, and obtain the corresponding Calibration parameter values.3.如权利要求1所述的输出参数校正方法，其中该白平衡程序为该数字图像撷取装置在该特定光源环境下，以垂直角度对一白纸进行图像撷取，用以作环境亮度校正。3. The output parameter correction method as claimed in claim 1, wherein the white balance program is that the digital image capture device captures an image of a white paper at a vertical angle under the specific light source environment, and uses it for ambient brightness Correction.4.如权利要求3所述的输出参数校正方法，其中该特定光源环境是指利用二白炽光源分别在相对方向，以与水平方向夹45度的角度照射该白纸。4. The output parameter correction method according to claim 3, wherein the specific light source environment refers to using two incandescent light sources in opposite directions to irradiate the white paper at an angle of 45 degrees to the horizontal direction.5.如权利要求1所述的输出参数校正方法，其中该第一参考内容数据包含一红色区域、一绿色区域及一蓝色区域。5. The output parameter calibration method as claimed in claim 1, wherein the first reference content data includes a red area, a green area and a blue area.6.如权利要求5所述的输出参数校正方法，其中所述参数比较值是藉由比较该第一参考内容数据以及该第二参考内容数据的该红色区域、该绿色区域及该蓝色区域而产生。6. The output parameter calibration method as claimed in claim 5, wherein said parameter comparison value is obtained by comparing the red area, the green area and the blue area of the first reference content data and the second reference content data And produced.7.如权利要求5所述的输出参数校正方法，其中该第一参考内容数据进一步包含至少一灰阶区域。7. The output parameter calibration method as claimed in claim 5, wherein the first reference content data further comprises at least one gray scale area.8.如权利要求7所述的输出参数校正方法，其中所述参数比较值是藉由比较该第一参考内容数据以及该第二参考内容数据的该红色区域、该绿色区域、该蓝色区域以及该灰阶区域而产生。8. The output parameter calibration method as claimed in claim 7, wherein said parameter comparison value is obtained by comparing the red area, the green area, and the blue area of the first reference content data and the second reference content data And the grayscale area is generated.9.一种参数校正系统，应用于一图像撷取装置中以校正一输出参数组，其储存于该数字图像撷取装置中以供附加于一图像文件，该输出参数组提供一输出装置输出该图像文件时所需的多个参数，该图像文件包含一标题区用以储存该输出参数组，以及一图像数据区用以储存一图像内容数据，该数字图像撷取装置内储存有一第一参考图像文件，该第一参考图像文件包含该输出参数组以及一第一参考内容数据，并经由该输出装置输出成一参考校正相片，该参数校正系统包含：9. A parameter correction system, applied in an image capture device to correct an output parameter set, which is stored in the digital image capture device for appending to an image file, the output parameter set provides an output device output A plurality of parameters required for the image file, the image file includes a header area for storing the output parameter set, and an image data area for storing an image content data, the digital image capture device stores a first A reference image file, the first reference image file includes the output parameter set and a first reference content data, and is output as a reference calibration photo through the output device, the parameter calibration system includes:一存储器，用以储存该输出参数组；a memory for storing the output parameter set;一图像撷取模块，用以An image capture module for在一特定光源环境下对该数字图像撷取装置进行一白平衡程序；以及performing a white balance procedure on the digital image capture device under a specific light source environment; and在该特定光源环境下，利用该数字图像撷取装置对该参考校正相片进行图像撷取，以形成一第二参考图像文件，内包含一第二参考内容数据；以及Under the specific light source environment, using the digital image capture device to perform image capture on the reference calibration photo to form a second reference image file, which includes a second reference content data; and一校正模块，用以a calibration module for比较该第一参考内容数据与该第二参考内容数据以获得多个参数比较值；comparing the first reference content data with the second reference content data to obtain a plurality of parameter comparison values;根据所述参数比较值经由一预定程序得出多个校正参数值；以及obtaining a plurality of correction parameter values through a predetermined procedure according to the parameter comparison value; and根据所述校正参数值，更新该输出参数组；以及updating the set of output parameters according to the correction parameter value; and储存该更新后的输出参数组于该数字图像撷取装置，storing the updated output parameter set in the digital image capture device,其中，该数字图像撷取装置并在至少一后续图像文件产生时，附加该校正后的输出参数组于所述后续图像文件的标题区中。Wherein, when the digital image capture device generates at least one subsequent image file, it adds the corrected output parameter set in the header area of the subsequent image file.10.如权利要求9所述的参数校正系统，进一步包含一参数校正对照表，该预定程序是以所述参数比较值查询该参数校正对照表，对应得到所述校正参数值。10 . The parameter calibration system according to claim 9 , further comprising a parameter calibration table, the predetermined procedure is to query the parameter calibration table with the parameter comparison value to obtain the corresponding calibration parameter value. 11 .11.如权利要求9所述的参数校正系统，其中该白平衡程序为该数字图像撷取装置在该特定光源环境下，以垂直角度对一白纸进行图像撷取，用以作环境亮度校正。11. The parameter correction system as claimed in claim 9, wherein the white balance program is that the digital image capture device captures an image of a white paper at a vertical angle under the specific light source environment for environment brightness correction .12.如权利要求11所述的参数校正系统，其中该特定光源环境是指利用二白炽光源分别在相对方向，以与水平方向夹45度的角度照射该白纸。12. The parameter correction system as claimed in claim 11, wherein the specific light source environment refers to using two incandescent light sources in opposite directions to irradiate the white paper at an angle of 45 degrees to the horizontal direction.13.如权利要求9所述的参数校正系统，其中该第一参考内容数据包含一红色区域、一绿色区域及一蓝色区域。13. The parameter calibration system as claimed in claim 9, wherein the first reference content data comprises a red area, a green area and a blue area.14.如权利要求13所述的参数校正系统，其中所述参数比较值的藉由比较该第一参考内容数据以及该第二参考内容数据的该红色区域、该绿色区域及该蓝色区域而产生。14. The parameter calibration system as claimed in claim 13, wherein the parameter comparison value is determined by comparing the red area, the green area and the blue area of the first reference content data and the second reference content data produce.15.如权利要求13所述的参数校正系统，其中该第一参考内容数据进一步包含至少一灰阶区域。15. The parameter calibration system as claimed in claim 13, wherein the first reference content data further comprises at least one gray scale area.16.如权利要求15所述的参数校正系统，其中所述参数比较值是藉由比较该第一参考内容数据及该第二参考内容数据的该红色区域、该绿色区域、该蓝色区域以及该灰阶区域而产生。16. The parameter correction system as claimed in claim 15, wherein the parameter comparison value is obtained by comparing the red area, the green area, the blue area and the first reference content data and the second reference content data This gray scale area is generated.

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