CN1585494A - Digital image forming device and method - Google Patents
Digital image forming device and method Download PDFInfo
- Publication number
- CN1585494A CN1585494A CNA2004100596552A CN200410059655A CN1585494A CN 1585494 A CN1585494 A CN 1585494A CN A2004100596552 A CNA2004100596552 A CN A2004100596552A CN 200410059655 A CN200410059655 A CN 200410059655A CN 1585494 A CN1585494 A CN 1585494A
- Authority
- CN
- China
- Prior art keywords
- image
- digitized video
- unit
- data
- brightness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Studio Devices (AREA)
- Picture Signal Circuits (AREA)
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
The system consists of image capturing unit, measurement unit and image process unit. The above image capturing unit provides digital image material corresponding to target object. The above measurement unit provides brightness material about the target object. The image process unit generates an image file according to the digital image material and sets the contrast and gray level of the image material.
Description
Technical field
The present invention relates to a kind of digitized video and form device and a kind of digitized video formation method, a kind of digitized video that especially uses gamma to proofread and correct (gamma correction) forms device and a kind of digitized video formation method.
Background technology
The manifestation mode of digitized video is utilized RGB (red, green, blue) pattern more at present, also is most at present colorific modes of screen.For example, use 24 and represent color, promptly represent three kinds of colors of red, green, blue with 8 respectively, that is to say, these three kinds of colors have the individual level of 256 (2 8 powers) (from the darkest to the brightest) respectively.If only use 15 to represent color, then three kinds of colors can only represent just have only 32 (2 5 powers) levels with 5 respectively.
The optical pickocff of digital camera is the incident light that object is sent, and converts voltage signal to, and wherein incident intensity and voltage signal intensity relation each other generally can be considered and have linear relationship.Yet, when output one digitized video, be not with this voltage signal intensity of linear response.That is to say, the contrast of one digitized video color (contrast) is not to be linear with the performance of level (gradation), for instance, brightness value is that to should be brightness value in theory be half of 200 brightness for 100 brightness meeting, but, because some restriction, when output, brightness value be 100 o'clock brightness may be brightness value be 200 o'clock brightness 1/3.In order to handle this problem, can utilize a function to revise brightness value, allow the brightness value be at 100 o'clock, output brightness meeting is half of brightness value 200.This correction function parameter wherein is called the gamma value, is called the gamma correction again so this revises step.
General digitized video forms device, digital camera for example, and the digitized video quality that is produced has confidential relation with conditions of exposure again.When exposure heals when high, also brighter in the digitized video general performance that is produced, therefore, general digital camera all has automatic exposure (Auto Exposure) mechanism, to determine optimal exposure.
At United States Patent (USP) the 6th, 011, in No. 547, disclose a kind of method that presents digitized video, be the digital image data that obtains from digital camera, utilize a display or a printer presents this digitized video.In this invention, this digital camera absorbs this digital image data, and note down an image processing condition, this digital image data image processing condition is therewith together saved as image archives in an image server, this display or this printer are handled and these image archives of output according to this image processing condition, and it is best in quality that presenting of this digital image data had.
Similarly, at United States Patent (USP) the 6th, 011, in No. 547, disclose a kind of image and present system.This image present system comprise an image pickup unit, a processing unit, with a record information adding device.This image pickup unit is for the record digital image data.This handles the unit, is to carry out an automatic exposure at this digital image data to handle (automatic exposure processing).This record information adding device, record information is added this digital image data, this record information comprises the ratio of importing light quantity and output voltage in the digital camera, this record information adding device further is combined into image archives with this digital image data record information therewith, is stored in the image server.
Yet, United States Patent (USP) the 6th, 011, in No. 547, in presenting the method for digitized video, there is no announcement and how to select an image processing condition, it is best in quality that presenting of this digital image data had, and especially there is no announcement and how to make presenting of this digitized video have best contrast effect.Similarly, present in the system at the image that it disclosed, also there is not the ratio (being the gamma value) of importing light quantity and output voltage in the digital camera of how selecting that discloses, it is best in quality that presenting of this digital image data had, and especially there is no announcement and how to make presenting of this digitized video have best contrast effect.Especially, United States Patent (USP) the 6th, 011 need to use an image server No. 547, make cost rise and design complicated.
In addition at United States Patent (USP) the 6th, 094, in No. 502, disclose a kind of digital copier (digital copymachine).Under the situation of not utilizing big capacity internal memory, this digital copier can be adjusted into the gamma value of its use one the suitableeest gamma value.This digital copying machines uses a density (density) arrangement for detecting, and the density of each pixel on the detecting one test contribution is according to the result who is detected, in the hope of this suitableeest gamma value.Yet United States Patent (USP) the 6th, 094 there is no announcement No. 502, under situation of not using this test contribution, how to select this suitableeest gamma value.
The present method that digital camera adopted all is to define a general gamma value, therefore, if can have a kind of can be according to shooting environmental, and from a plurality of gamma values that store in advance, select the device or the method for the suitableeest gamma value, and make presenting of digitized video have best contrast and/or level, will have great advantage.
Summary of the invention
The object of the present invention is to provide a kind of digitized video to form device and a kind of digitized video formation method,, set contrast and/or level that this digitized video presents for brightness data according to an object.
Another object of the present invention is to provide a kind of digitized video to form device and a kind of digitized video formation method, for brightness data according to an object, the automatically selected the suitableeest gamma value is further set contrast and/or the level that this image presented according to this suitableeest gamma value.
The present invention proposes a kind of digitized video and forms device, this digitized video form device comprise an image pickup unit, a measuring unit, with an image process unit.Described image pickup unit produces digital image data for corresponding object.Described measuring unit is for the brightness data that produces this object.Described image process unit for according to described digital image data, produces image archives.Wherein, described image process unit is set contrast and/or level that described digital image data presents according to described brightness data; Aforesaid measuring unit also can be combined into the image pickup unit that can measure the brightness data with the image pickup unit.
The present invention also proposes a kind of digitized video formation method, and the method comprises: complex gamma value (a) prestores; (b) corresponding object produces digital image data; (c) produce the brightness data of this object; (d) according to this brightness data therewith complex gamma value compare out the suitableeest gamma value; And (e) set contrast and/or the brightness that this digital image data presented, and further produce image archives according to this suitableeest gamma value.
The present invention can be according to the brightness data of shooting environmental, object, the selected the suitableeest gamma value from a plurality of gamma values that store in advance, set contrast and/or the level that digital image data presented according to this suitableeest gamma value again, and make presenting of digitized video have best contrast and/or level.
Description of drawings
Fig. 1 is that the digitized video of one embodiment of the invention forms the device schematic diagram;
Fig. 2 is a plurality of gamma values of one embodiment of the invention;
Fig. 3 is that the digitized video of one embodiment of the invention forms method flow diagram;
Fig. 4 is the intensity map of digital image data in one embodiment of the invention.
Embodiment
As shown in Figure 1, digitized video forms the image process unit 106 that device 100 comprises an image pickup unit 102, a measuring unit 104 and is connected with the two respectively.This image pickup unit 102 produces a digital image data for a corresponding object.This measuring unit 104 is for a brightness data that produces this object.This image process unit 106 for according to this digital image data, produces image archives.Wherein, this image process unit 106 is set contrast (contrast) and/or level (gradation) that this image presents according to this brightness data.What deserves to be mentioned is that in another embodiment, measuring unit 104 also can be combined into the image pickup unit that can measure the brightness data with image pickup unit 102.Ripe this skill person should know, though digitized video proposed by the invention forms device with the following example explanation, but digital copier, scanner, digital camera, digital camera camera and have digital camera and/or the portable electronic devices of digital camera camera function or the like are all in the scope that the present invention desired to contain.In addition, digitized video proposed by the invention forms device and also is applicable to the color digital image, and that the basic principle of this color digital image should be ripe this skill person institute is known, does not add at this and gives unnecessary details.
In another embodiment, measuring unit 104 is not the brightness at direct measurement target thing scene.Measuring unit 104 is to produce this brightness data according to digital image data.Because each pixel all is responsible for received light signal is converted to electric signal on the transducer of image pickup unit 102, and the pairing electric signal of light signal of varying strength is also different.Therefore the degree of the electric signal that each pixel is received is carried out the numerical value processing, can select the mean value or the median of all signal strengths, as this brightness data, and offers image process unit 106 uses.
In one embodiment, digitized video forms device 100 and more comprises an image output unit 110, this image output unit 110 is a LCD display curtain, and image process unit 100 is further according to the output characteristic of LCD display curtain 110, particularly input voltage with output light quantity ratio, and selected this suitableeest gamma value, and contrast and/or level that this image data is presented on LCD display curtain 110 have best in quality.
In another embodiment, digitized video forms device 100 and connects an external image output unit in wired or wireless mode, and this outside image output unit is a projector or a printer.With the projector is example, image process unit 100 is further according to the output characteristic of this projector, the ratio of input voltage and output light quantity particularly, and selected this suitableeest gamma value, and contrast and/or level that this image data is presented in this projector have best in quality.
Fig. 3 is the digitized video formation method flow diagram according to the embodiment of the invention.In the step 300, store complex gamma value (as shown in Figure 2) in advance, this complex gamma value can be burned onto in the circuit in advance, or be embedded in the internal memory with the kenel of a computer executable program code, this internal memory can in be built in as shown in Figure 1 the image process unit 106, also can be a circumscribed or extraction-type internal memory, for example a flash memory card.In the step 302, a corresponding object produces a digital image data; In step 304, produce the brightness data of this object; Then in step 306, obtain the suitableeest gamma value according to the brightness data; And in step 308, according to the suitableeest gamma value, the contrast that setting of image presented.
In the step 302, see through an optical system and a transducer, will be converted to electric signal,, be converted to electric signal in various degree wherein according to the difference of light signal strength corresponding to the light signal of this object.And all electric signals are combined, then obtain～preliminary digital image data.
In the step 304, produce this brightness data according to the digital image data that is obtained in the step 302.Fig. 4 is among the embodiment, and according to the intensity map that digital image data produced, wherein X-axis is represented the measured brightness value of each pixel (scope from 0 to 255), Y-axis representative counting (count).By learning among Fig. 4, in this digital image data, the number that brightness value is about 112 pixels is maximum, so this brightness value 112 of definable is as this brightness data.Among another embodiment, also can all pixels be sorted according to pairing brightness according to Fig. 4, setting brightness range is 5%, and 10000 pixels are even arranged, and is then started at by the darkest pixel, select sort the 500th pixel of brightness, and according to the brightness value of this pixel as this brightness data.In other embodiments, step 304 can be utilized a light meter, the brightness at actual measurement object scene, and as this brightness data.
In the step 306, according to the brightness data of gained in the step 304, the selected the suitableeest gamma value in the complex gamma value that prestores, for instance, when the brightness value in the step 304 during less than one first default value (for example 50), the suitableeest for this reason gamma value of gamma 1 among then selected Fig. 2; When the brightness value in the step 304 during greater than one second default value (for example 200), the suitableeest for this reason gamma value of gamma 2 among then selected Fig. 2.And in step 308, according to this suitableeest gamma value, it is best in quality that contrast that this digital image data presents and/or level are had, and further produce image archives.In one embodiment, these image archives utilize CRT screen output, then step 306 is further according to the output characteristic of this CRT screen, particularly input voltage with output light quantity ratio, and selected this suitableeest gamma value, and make contrast and/or the level that this digital image data is presented on this CRT screen in the step 308 have best in quality.In another embodiment, these image archives utilize color inkjet printer output, then step 204 is further according to the output characteristic of this color inkjet printer, the ratio of input voltage and output ink density particularly, and selected this suitableeest gamma value, and make in the step 308, this digital image data has best in quality by contrast and/or the level that this color inkjet printer presented.
Claims (13)
1. a digitized video forms device, and it is characterized in that: image pickup unit, measuring unit connect image process unit respectively, and described image pickup unit produces digital image data for corresponding object; Described measuring unit is for the brightness data that produces this object; Described image process unit prestores complex gamma value, and this image process unit can be selected the suitableeest gamma value according to this brightness data, setting contrast and/or the level that this digital image data is presented, and further produces the image archives.
2. digitized video according to claim 1 forms device, and it is characterized in that: this image process unit also comprises an internal memory, for storing this complex gamma value.
3. digitized video according to claim 2 forms device, and it is characterized in that: this brightness data comprises the Luminance Distribution of each pixel in this digital image data.
4. digitized video according to claim 1 forms device, it is characterized in that: this digitized video forms device and also comprises an image output unit, this image output unit is for these image archives of output, wherein, this image process unit is set the contrast and/or the level that are presented when these image archives are exported further according to the output characteristic of this image output unit.
5. digitized video according to claim 1 forms device, it is characterized in that: this digitized video forms the also external image output unit of device, this image output unit is for these image archives of output, wherein, this image process unit is set the contrast and/or the level that are presented when these image archives are exported further according to the output characteristic of this image output unit.
6. a digitized video formation method is characterized in that, comprises following steps:
(a) the complex gamma value that prestores;
(b) a corresponding object produces a digital image data;
(c) produce a brightness data of this object;
(d) compare out the suitableeest gamma value according to this brightness data and this complex gamma value; And
(e) set contrast and/or the brightness that this digital image data presented according to this suitableeest gamma value, and further produce image archives.
7. a kind of digitized video formation method according to claim 6 is characterized in that, wherein step (c) comprises:
(f) produce this brightness data according to this digital image data.
8. a kind of digitized video formation method according to claim 7, it is characterized in that: this brightness data comprises the Luminance Distribution of each pixel in this digital image data.
9. a digitized video forms device, it is characterized in that: comprise interconnective image pickup unit and image process unit, the image pickup unit has the brightness of measurement function, produces a digital image data and a brightness data for a corresponding object; Image process unit prestores complex gamma value, this image process unit is the selected the suitableeest gamma value according to this brightness data, for setting contrast (contrast) and/or level (gradation) that this digital image data presented, and further produce image archives.
10. a kind of digitized video according to claim 9 forms device, it is characterized in that: also comprise an internal memory, for storing a plurality of gamma values.
11. a kind of digitized video according to claim 9 forms device, it is characterized in that this brightness data comprises the Luminance Distribution of each pixel in this digital image data.
12. a kind of digitized video according to claim 9 forms device, it is characterized in that: this digitized video forms device and also comprises an image output unit, this image output unit is for these image archives of output, wherein, this image process unit is set the contrast and/or the level that are presented when these image archives are exported further according to the output characteristic of this image output unit.
13. a kind of digitized video according to claim 9 forms device, it is characterized in that: this digitized video forms the also external image output unit of device, this image output unit is for these image archives of output, wherein, this image process unit is set the contrast and/or the level that are presented when these image archives are exported further according to the output characteristic of this image output unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100596552A CN100356796C (en) | 2004-06-15 | 2004-06-15 | Digital image forming device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100596552A CN100356796C (en) | 2004-06-15 | 2004-06-15 | Digital image forming device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1585494A true CN1585494A (en) | 2005-02-23 |
| CN100356796C CN100356796C (en) | 2007-12-19 |
Family
ID=34603406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100596552A Expired - Fee Related CN100356796C (en) | 2004-06-15 | 2004-06-15 | Digital image forming device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100356796C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372364C (en) * | 2005-11-28 | 2008-02-27 | 华为技术有限公司 | Video signal collection apparatus |
| CN102237052A (en) * | 2010-04-23 | 2011-11-09 | 北京京东方光电科技有限公司 | Liquid crystal display (LCD) driving circuit and driving method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001257907A (en) * | 2000-03-13 | 2001-09-21 | Fujitsu General Ltd | Gamma correction circuit |
| CN1406052A (en) * | 2001-08-13 | 2003-03-26 | 力捷电脑股份有限公司 | Method and system for scanning grey pictures |
| JP3997786B2 (en) * | 2002-01-24 | 2007-10-24 | ソニー株式会社 | Imaging device, display device, image recording device, and image quality correction method |
| JP3823865B2 (en) * | 2002-04-10 | 2006-09-20 | ノーリツ鋼機株式会社 | Image processing method, image processing program, and recording medium on which image processing program is recorded |
-
2004
- 2004-06-15 CN CNB2004100596552A patent/CN100356796C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372364C (en) * | 2005-11-28 | 2008-02-27 | 华为技术有限公司 | Video signal collection apparatus |
| CN102237052A (en) * | 2010-04-23 | 2011-11-09 | 北京京东方光电科技有限公司 | Liquid crystal display (LCD) driving circuit and driving method |
| CN102237052B (en) * | 2010-04-23 | 2013-05-01 | 北京京东方光电科技有限公司 | Liquid crystal display (LCD) driving circuit and driving method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100356796C (en) | 2007-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10021313B1 (en) | Image adjustment techniques for multiple-frame images | |
| CN100594736C (en) | Image capture apparatus and control method thereof | |
| US8373769B2 (en) | Imaging apparatus, imaging processing method and recording medium | |
| CN112118388B (en) | Image processing method, image processing device, computer equipment and storage medium | |
| TWI389550B (en) | Brightness information display device and method | |
| CN101569173A (en) | Reduced position dependent noise in digital images | |
| JP2005500590A5 (en) | ||
| CN115460386B (en) | Method and system for acquiring color image by black-and-white camera | |
| US7146040B2 (en) | Automatic white balance technique | |
| JP6611543B2 (en) | Image processing apparatus, image processing method, and program | |
| US7277576B2 (en) | Active color correction to compensate for near field color cast | |
| CN112365550A (en) | Display calibration method and device, terminal, calibration system and storage medium | |
| JP5616861B2 (en) | Image capturing apparatus and method | |
| JPH11341501A (en) | Electrophotographic image pickup device, electrophotographic image pickup method and medium recorded with electrophotographic image pickup control program | |
| CN107454388A (en) | Image processing method and the device using this method | |
| US7397968B2 (en) | System and method for tone composition | |
| CN100356796C (en) | Digital image forming device and method | |
| JP2016051982A (en) | Image processing system, camera, and image processing program | |
| US7953272B2 (en) | Image processor, image processing method and computer readable medium for image processing program | |
| JP2007306422A (en) | Imaging apparatus and imaging method | |
| JP2007293686A (en) | Imaging apparatus, image processing apparatus, image processing method and image processing program | |
| US7701618B2 (en) | Automatic image enhancement using computed predictors | |
| CN116324869A (en) | Method and device for correcting brightness and chrominance | |
| CN113709429A (en) | Color correction method and color correction system | |
| US20040208393A1 (en) | Image processing device, image processing method, and image processing program product for making determination based on spectrum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20150615 |
|
| EXPY | Termination of patent right or utility model |