CN102149004A - Three-dimensional color gamut digital television test graph template and manufacturing method thereof - Google Patents
Three-dimensional color gamut digital television test graph template and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a three-dimensional color gamut digital television test graph template and a three-dimensional color gamut digital television test graph sequence, and introduces a method for testing television sets, displays and the like by using the three-dimensional color gamut digital television test graph sequence, which is used for comprehensively testing the three-dimensional color gamut of various display devices and display modes. Luminance, tones and chroma representation ranges are comprehensively tested by the method, so that the various display devices and display modes can be matched with the chroma characteristics of signals in the luminance, the tones and the chroma, the potential of the representation color gamut of different types of display devices and display modes can be fully exerted, the signal color gamut is matched or broadened, corresponding widest color gamut images and video pictures are acquired, and a color visual effect is improved.
Description
Technical field
The present invention relates to digital television techniques and color science and technology, be specifically related to a kind of three-dimensional gamut Digital Television resolution chart template and preparation method thereof.
Background technology
Consider for aspects such as television system and compatibility of apparatus, conventional at present analog-and digital-television system is still continued to use the part photoelectricity and the colorimetric parameter of the selected television system of cathode-ray picture tube (CRT picture tube) characteristic, and chrominance signal Code And Decode and transmission means are also made every effort to and original television system compatibility.This system that makes can transmit and the Color Range of representation, claims " colour gamut " to be restricted again.This restriction is embodied in nature and has, manually can synthesize or calculate function making, the perception of vision energy, and the formation television system should be transmitted the colour gamut width with representation.Consequently make the colour gamut coverage rate of present TV signal only be about vision and can experience 1/3 of gamut range.
Along with developing rapidly of modern science and technology and industry, in recent years multiple new display spare and Display Technique continue to bring out.Except that traditional cathode ray tube (CRT), LCD (LCD), plasma scope (PDP), digital optical processor (DLP), Liquiid crystal on silicon (lcos) display (LCoS), back light source in LED LCD (LED-LCD), 4 yuan of looks above multiple new display spares such as polynary look LCD are practicability or succeeded in developing.Aspect display mode, except that direct viewing type, front projection, back projection, laser projection and polynary look projection etc. have also dropped into practicality.These new display spares and display mode are based on different principle, and different structure adopts different materials, device and technology, and the color rendering performance obviously improves, and colour gamut enlarges, and some " following type " display devices and display mode also will be emerged in large numbers.
For realizing the colour gamut coupling of different colour gamut signals and different display devices or display mode, for example with the narrow colour gamut TV signal of routine broadening, make wide color gamut displays spare or wide colour gamut display mode be able to representation color more saturated wide color gamut images or video pictures, improve visual effect, need design and generate the colour gamut resolution chart, be used for measuring the colour gamut of different display devices or display mode, and then by Color Gamut Mapping etc., realize the coupling and the expansion of colour gamut.
Time-honored color science studies confirm that color has brightness (lightness), three kinds of attributes of color harmony color saturation.Brightness refers to the power that colourama stimulates.Tone is a chromaticity, the tone difference of different wave length visible light, visible wavelength from long to short, tone tapers to blueness by redness.Color saturation refers to the purity of color, contains the low more color of white light ratio, and its color saturation is high more.
At present general colourity test is the two-dimentional resolution chart with certain luminance (lightness), measures the two-dimentional look performance of display device or display screen, has has in fact only evaluated and tested the color harmony colour saturation quality under the certain luminance (lightness)." the colour gamut coverage rate " that China's relevant criterion requirement is at present measured also is the three kinds of full width of cloth resolution charts of red, green and blue with 100% amplitude, but measures the chromaticity range of representation three primary colors qualification and the ratio of visible light chromaticity range.
In fact, different display devices or display mode are under different brightness (lightness), and colour gamut has very big difference.Flat-panel monitor such as LCD, PDP for example, after brightness (lightness) improved, colour gamut is constriction greatly, this means the employing prior art, the high saturation color that these displays can not exhibit high brilliance (lightness).For the three-dimensional gamut that realizes display and signal is complementary, widen three-dimensional gamut, improve the three-dimensional chroma characteristic of product, need design and generate the three-dimensional gamut resolution chart, be used for measuring the triplet charm attribute of different display devices and display mode comprehensively, provide the three-dimensional gamut test data, for the apparent again design of the three-dimensional look of product provides basic data.
Summary of the invention
The present invention provides a kind of three-dimensional gamut Digital Television resolution chart template in order to solve above-mentioned problems of the prior art, and has introduced its manufacture method.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is:
Three-dimensional gamut Digital Television resolution chart template of the present invention, be that a fabric width degree and aspect ratio are the resolution chart picture of 16:9, the resolution chart picture each side accounts for 1/9 of picture width and is black, resolution chart picture up and down both sides respectively accounts for 1/9 of height and is black, the resolution chart picture is removed on every side, and the zone line of black part is the Validity Test district, the Validity Test district is equally divided into 11 row, 16 row, totally 176 Validity Test color lumps, each color lump contains at least 500 pixels, each color lump be expert at and be listed as between at least 2 pixels at interval, row is a black with interval region between being listed as.
Four limits of described resolution chart picture are provided with a plurality of full width of cloth signs of white triangles shape that account for 2 pixels, and central authorities are provided with the white circular center mark that accounts for 2 pixels.
Be respectively equipped with outside four angles, described resolution chart Validity Test district and check with auxiliary color lump, each auxiliary color lump all accounts for 500 pixels.
A kind of method of making above-mentioned three-dimensional gamut Digital Television resolution chart template comprises the steps:
The shared pixel of definition resolution chart picture is 1920 * 1080 in Photoshop;
About the resolution chart picture, respectively get 1/9 of picture width, fill black; Respectively get 1/9 of height up and down at the resolution chart picture, fill black;
The Validity Test district of resolution chart picture zone line is divided into 11 row, 16 row, totally 176 Validity Test color lumps, each color lump contains at least 500 pixels, each color lump be expert at be listed as between the interval of at least 2 pixels of setting, filling black;
The full width of cloth sign of the white triangles shape that accounts for 2 pixels is set on four limits of resolution chart picture, and every limit is provided with two, and central authorities are provided with the white circular center mark that accounts for 2 pixels.
Be provided with respectively outside four angles, Validity Test district of resolution chart picture and check with auxiliary color lump, each auxiliary color lump all accounts for 500 pixels.
Advantage and good effect that the present invention has are:
The present invention's design has also generated three-dimensional gamut Digital Television resolution chart template and resolution chart sequence, and introduced method of testing, is used for measuring the three-dimensional gamut that various display devices and display mode are had comprehensively.Measure brightness (lightness), color harmony color saturation representation scope comprehensively, be used as various display devices and display mode aspect three of brightness, color harmony color saturation, realize colorimetric properties coupling with signal, give full play to the representation colour gamut potentiality of dissimilar display devices and display mode, coupling or broadening signal colour gamut, obtain the widest color gamut images and video pictures accordingly, improve the color vision effect.
Description of drawings
Fig. 1 is the three-dimensional gamut Digital Television resolution chart template of 16:9 the ratio of width to height of the present invention;
Fig. 2 is each color lump of a width of cloth of the present invention resolution chart picture of assignment.
Embodiment
It is following that the present invention will be described in detail with reference to drawings and Examples.
Television display screen commonly used or the ratio of width to height of projector screen mainly contain two kinds of 4:3 and 16:9.The present invention is an example with the ratio of width to height 16:9 commonly used, has introduced the method for designing and the method for testing of three-dimensional gamut Digital Television resolution chart sequence.Utilize method for designing provided by the invention, also be easy to design and generate the resolution chart or the resolution chart sequence of other the ratio of width to height.
Owing to there are reasons such as defective in working mechanism difference or production process, the picture that kinds of displays part or display mode are reappeared is often inhomogeneous, particularly the colorimetric properties at screen edge and screen middle part are often variant, and vision is concerned about the middle part of image or video pictures most.The present invention's design and the three-dimensional gamut Digital Television resolution chart sequence that generates are used same resolution chart template, for reducing the inhomogeneous influence of picture to colorimetry, and making the resolution chart sequence be applicable to the colorimetric parameter test of kinds of displays part and display mode, has removed around the picture in the resolution chart picture Validity Test district of resolution chart template.As shown in Figure 1, the shared pixel of whole resolution chart picture is 1920 * 1080, respectively removes 1/9 of height up and down, about respectively remove 1/9 of picture width.For reducing from of the influence of the non-effective measurement zone light in resolution chart edge non-effective measurement zone filling black to colorimetry.
Be the relative position between location colorimeter and resolution chart, the full width of cloth sign of white triangles shape is established on resolution chart four limits, and every limit is provided with the full width of cloth sign of two triangles, and the full width of cloth sign of each triangle accounts for 2 pixels.Central authorities establish white circular center mark, and white circular center mark also accounts for 2 pixels.
For making colorimeter once be gathered the chroma data of multiple test color lumps, improve efficiency of measurement, resolution chart picture Validity Test zoning is divided into some row and several rows test block.Each color lump contains at least 500 pixels, makes colorimeter be gathered the chroma data of a plurality of pixels, and is the measurement result of this color lump colorimetric parameter with their mean value, improves the reliability of measurement result.
For reducing from of the influence of adjacent color lump light to institute's colour examining piece colorimetric parameter, each color lump between row and row, all enough at interval distances, i.e. 2 pixels at interval, and with it filling with black.
For ease of handling measurement data, each color lump is pressed row order from left to right earlier, presses row order from top to bottom again, sequentially numbers.Be interferometry not, the numbering of color lump is not presented on the resolution chart, and only is presented as the ordering of test section and corresponding measurement data.
Because of the test three-dimensional gamut needs the colorimetric parameter of the more color lump of testing, so resolution chart need be designed to the resolution chart sequence be made up of several resolution charts, the present invention chooses 5 width of cloth.The layout of each width of cloth resolution chart is identical.For checking using several resolution charts to measure respectively in the process of three-dimensional colorimetric parameter, keep the consistency of measurement state, check the auxiliary color lump that the test consistency is used at 4 of four jiaos of peripheral hardwares in each width of cloth resolution chart Validity Test district.The position of these the auxiliary color lumps in each width of cloth resolution chart and size relative fixed in each resolution chart, colorimetric parameter (for example being followed successively by the brightest white, blue or green, yellow and green heavy shade) is corresponding respectively.
After making the resolution chart template, need selected look parameter.For measuring colour gamut, each test color lumps is filled with surface colour.Towards different application, surface colour can the corresponding different color spaces, use the RGB color space usually.
The three-dimensional gamut of different display devices or display mode distributes and is not quite similar, the colorimetric parameter of each test color lumps for example can be by selected in the equally distributed principle of the corresponding color space, but be not limited to evenly choose a kind of mode, to adapt to the three-dimensional gamut characteristic distributions of different measurands.
Colorimetric parameter evenly or the color lump quantity of non-uniform Distribution according to required colour gamut certainty of measurement, is taken into account the quantified precision of digital test figure and is decided.Fig. 2 shows each color lump of width of cloth resolution chart of assignment for example.Each color lump is filled with the different table complexion of the different color spaces.The colorimetric parameter of each test color lumps evenly distributes by the corresponding color space or the non-uniform Distribution principle is selected.Color lump quantity is according to colour gamut certainty of measurement and quantified precision and decide.Fig. 2 presses the design of the RGB color space, and normalized R, G and B value respectively are divided into 13 values, generates the digital test figure of 8 bit quantified precisions, and the resolution chart sequence contains 866 kinds of surface colours altogether, and heavy shade wherein is 469 kinds.
Numerous test color lumps need be distributed to the different resolution charts in the resolution chart sequence.866 kinds of surface colours are distributed in as shown in Figure 15 width of cloth resolution charts.Fig. 1 contains 176 Validity Test color lumps, and 5 width of cloth resolution charts are surplused 14 color lumps, can repeat to be provided with the significant color lump to the checking measurements result, for example muted color color lump or white color lump.The group forming criterion of test color lumps is that the normalization brightness value is divided equally, and the approaching color lump of brightness is arranged into same width of cloth resolution chart.Consistent as far as possible for making colorimeter gather same width of cloth resolution chart blocks of data required time of all kinds, answer five equilibrium brightness, the color lump that brightness is approaching is distributed to same width of cloth resolution chart.For example brightness is divided into 5 class,, is selected into 5 width of cloth resolution charts respectively corresponding 176 color lumps.Resolution chart example shown in Figure 2 is that brightness is divided into 5 class, and brightness value is selected into 5 width of cloth resolution charts respectively between 176 color lumps of corresponding class, and this figure is brightness between 0.80～1.00 1 width of cloth resolution chart example.
The resolution chart template is by computer programming or be used the generation of computer graphics instrument.
Each color lump color in each width of cloth resolution chart of resolution chart sequence generates by above-mentioned assignment.The assignment precision is determined according to quantified precision.For example to 8 bit, 13 grades of equally distributed digital test figure, each quantized level value such as table 1 are listed.
13 grades of equally distributed 8 bit quantified precision digital test figure values of table 1
| Quantized level | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Quantized value | 0 | 21 | 43 | 64 | 85 | 106 | 128 | 149 | 170 | 191 | 213 | 234 | 255 |
Resolution chart generates with digital component signal file format or bitmap file form.
Color science and technology all are widely used in various fields, different field demand difference.Some fields, for example remote measurement and remote sensing etc. has high requirements to true collection and reproducing colors.And other application, for example TV, advertisement and printing and dyeing etc., then the important requirement visual experience is good, and not necessarily pursues fidelity.
Color has brightness (lightness), three kinds of attributes of color harmony color saturation, need with three base quantity signs independently, gather, generate, handle, transmit and rebuild manually synthetic color such as bright and colourful natural landscape and computer, need or satisfy vision at fidelity aspect three of the brightness (lightness), color harmony color saturation in essence three-dimensional Color reproduction requirement.Research to triple attributes of color and reproducing technology thereof needs to carry out in three-dimensional color space.
To digital picture or digital video picture, the number of colours that can contain how much, the quantification bit number that depends on three color base quantitys, but quantified precision reaches certain value, 8 bit for example, thin again color is divided, and vision is difficult to distinguish, and more meaningfully attainable color gamut, i.e. colour gamut width or not coupling.
One section spectrum is corresponding with a specific colour gamut, and the human vision visible spectrum is corresponding with the visible light colour gamut, and different display devices or display mode are corresponding with the colour gamut of this device or equipment.Problem such as widen for solving look fidelity or colour gamut coupling, colour gamut, prerequisite is to measure the colour gamut of a section spectrum, visible light or particular device.
Traditional colorimetry is a colorimetric parameter of measuring the different colours of certain luminance (lightness), promptly carries out the colorimetric parameter on two-dimentional look plane and measures.Two-dimensional chromaticity is measured colourity base quantity of disappearance.In fact different components or equipment have very big difference to the colour gamut of different brightness, and for example the high brightness colour gamut is generally very narrow.
The limitation that this traditional two-dimensional chromaticity is measured causes really fidelity of system, or can not all satisfy the visual characteristic requirement in various brightness.
This invention at different display devices and display mode, from three-dimensional color space, designs and has generated three-dimensional colorimetric parameter resolution chart sequence based on the analysis to the color inherent characteristic.The resolution chart sequence is applicable to quick and accurate three-dimensional colorimetry.The correct this invention of using, can finish the quick mensuration of three-dimensional colorimetric parameter, thereby according to three-dimensional colourity test data, by methods such as Color Gamut Mapping, gamut extension, realize the fidelity of the triple attributes of color or aspect three of brightness, color harmony color saturation, improve visual effect comprehensively.
By above-mentioned three-dimensional gamut test philosophy and resolution chart sequences Design method, with computer programming or be aided with the computer graphics tool software,, generate the computer bit map file with 8 bit precision.
Deposit the computer bit map file in corresponding colorimetry signal generator.,, then need the convert file form around here, or carry out the corresponding file format conversion by signal generator random format crossover tool software if the signal generator file format is different with computer bit map file form.
By the colourity testing standard in related application field, in its environment provided, arrange equipment under test and tester, adjust the relative position between them, and make them work in stable standard testing state.Tester should adopt regular calibration, the colorimeter that precision meets the demands.Be to improve the three-dimensional gamut testing efficiency, colorimeter preferably adopts face formation CCD(charge coupled device) device finishes the opto-electronic conversion of the light image of being gathered.Colorimeter should have softwares such as spectrum analysis, data transaction at random.In addition, colorimeter preferably can provide the colorimetric parameter test result with the computer general-purpose document form data, to avoid the manual mistake of bringing with record data of reading.
In sum, the method for testing of utilizing above-mentioned three-dimensional gamut Digital Television resolution chart sequence to test is as follows:
At first in Photoshop, make 5 width of cloth resolution chart pictures, and with the Validity Test color lump in every width of cloth resolution chart picture earlier by from left to right row order, be numbered by from top to bottom row order again;
866 kinds of surface colours are filled into respectively in the Validity Test color lump of 5 width of cloth resolution chart pictures; Generate resolution chart, resolution chart generates with digital component signal file format or bitmap file form;
The resolution chart that generates is imported in the colorimetry signal generator by computer, convert the signal format that TG45AX form or other colorimeter signal source can be discerned to;
Show resolution chart in the colorimetry signal generator successively with tested television set or tested display, measure with colorimeter then that the number order record test data by each color lump draws test result.
At different demands, softwares such as three-dimensional gamut Measurement and Data Processing, analysis, drawing and output often need customized development, or the part customized development, and the three-dimensional gamut that provides measurement and analysis result will be used to improve the chroma characteristic of corresponding product.With tv display screen or projector's display screen is example, three-dimensional gamut is measured and analysis result will help display device manufacturer, television set and display factory, projector's production unit to improve raw-material prescription and production technologies such as fluorescent material and colour filter film, improve the optical property of optics and optical projection system, improve gamma correction, signal colour gamut and demonstration or the projection device colour gamut coupling of complete machine electric light conversion or expand colour gamut, coloured image that the representation visual experience is good or video pictures.
The present invention is an example with the television system, designs and generated three-dimensional gamut resolution chart sequence, is used for measuring the three-dimensional gamut that various display devices and display mode are had comprehensively.Measure brightness, color harmony color saturation representation scope comprehensively, be used as various display devices and display mode aspect three of brightness, color harmony color saturation, realize colorimetric properties coupling with signal, give full play to the representation colour gamut potentiality of dissimilar display devices and display mode, coupling or broadening signal colour gamut, obtain the widest color gamut images and video pictures accordingly, improve the color vision effect.
Since two-dimensional color be three-dimensional colour solid to etc. the projection on lightness colourity plane, so two-dimensional color is the special case of three-dimensional gamut, thereby this three-dimensional gamut resolution chart sequence also can be used for two-dimensional color mensuration, the three-dimensional gamut test data is comprising the three-dimensional gamut test data, also can be used for the two-dimensional chromaticity design of product.
Though this invention is example with the television system, design principle, Project Realization and the computer generating method etc. of its three-dimensional gamut resolution chart sequence also can be used for industries such as film, photograph, printing and dyeing." colour gamut " of broad sense refers to the color gamut of color information collection, generation, processing, transmission and reproduction.Color has brightness, the triple attributes of color harmony color saturation.This invention has designed and has generated the three-dimensional gamut resolution chart sequence of measuring colour brightness, color harmony color saturation from triple attributes that color has.Use these resolution charts,, can measure them under different brightness, the border of reproduction gamut comprehensively towards kinds of displays part and display mode.Purpose is based on the distributed in three dimensions of colour gamut, in three-dimensional color space, realizes the colour gamut coupling all sidedly, or widens reproduction gamut, promotes the visual effect of reappearing coloured image and video pictures.
Since two-dimensional color be three-dimensional gamut in the projection that waits on the YC plane, test so three-dimensional gamut resolution chart sequence that this invention provides or test data also can be used for two-dimensional color, under the brightness conditions such as realization, the coupling of color rendering or expansion.
Nature or the artificial equal tool brightness of color, the triple attributes of color harmony saturation that generate, thereby the present invention also is applicable to industries such as cinefilm making and projection and photograph, printing, printing, dyestuff and coating at aspects such as principle and realization technology.
Claims (5)
1. three-dimensional gamut Digital Television resolution chart template, it is characterized in that: this resolution chart template is that a fabric width degree and aspect ratio are the resolution chart picture of 16:9, the resolution chart picture each side accounts for 1/9 of picture width and is black, resolution chart picture up and down both sides respectively accounts for 1/9 of height and is black, the resolution chart picture is removed on every side, and the zone line of black part is the Validity Test district, the Validity Test district is equally divided into 11 row, 16 row, totally 176 Validity Test color lumps, each color lump contains at least 500 pixels, each color lump be expert at and be listed as between at least 2 pixels at interval, row is a black with interval region between being listed as.
2. three-dimensional gamut Digital Television resolution chart template according to claim 1 is characterized in that: four limits of resolution chart picture are provided with a plurality of full width of cloth signs of white triangles shape that account for 2 pixels, and central authorities are provided with the white circular center mark that accounts for 2 pixels.
3. three-dimensional gamut Digital Television resolution chart template according to claim 1 is characterized in that: be respectively equipped with outside four angles, resolution chart Validity Test district and check with auxiliary color lump, each auxiliary color lump all accounts for 500 pixels.
4. a method of making the described three-dimensional gamut Digital Television of claim 1 resolution chart template comprises the steps:
The shared pixel of definition resolution chart picture is 1920 * 1080 in Photoshop;
About the resolution chart picture, respectively get 1/9 of picture width, fill black; Respectively get 1/9 of height up and down at the resolution chart picture, fill black;
The Validity Test district of resolution chart picture zone line is divided into 11 row, 16 row, totally 176 Validity Test color lumps, each color lump contains at least 500 pixels, each color lump be expert at be listed as between the interval of at least 2 pixels of setting, filling black;
The full width of cloth sign of the white triangles shape that accounts for 2 pixels is set on four limits of resolution chart picture, and every limit is provided with two, and central authorities are provided with the white circular center mark that accounts for 2 pixels.
5. manufacture method according to claim 4 is characterized in that, the process of making the resolution chart template also comprises the steps:
Be provided with respectively outside four angles, Validity Test district of resolution chart picture and check with auxiliary color lump, each auxiliary color lump all accounts for 500 pixels.
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