CN1787010A - Method for dynamic changing picture element colour and method for changing image colour - Google Patents

Abstract

The invention is a pixel color dynamic converting method and an image color converting method. The former method comprises: 1)loading an image into a memory, including storing image color in the memory; 2) as requiring color conversion, regulating the hue of the image in HLS mode;3)converting the regulated pixel color values from HLS mode to RGB mode, and displaying them. The invention realizes the color conversion on the images with high quality color transition, raising the processing efficiency of the system and reducing the system load.

Description

A kind of method of dynamic changing picture element colour and the method for changing image colour

Technical field

The present invention relates to the computer color display technique, especially the method for the method of dynamic changing picture element color and dynamic mapping image color.

Background technology

The dynamic mapping of color is meant dynamically carries out versicolor process to image according to the logic needs, and universal also having obtained that the color kinematic transformation techniques is used along with computer media used widely.With the recreation is example, and the dynamic mapping of color can be enriched player's moulding, satisfies variation, the individual demand of player's moulding, and the conversion that is used to embody the game role property value, to satisfy the demand of game logic.

An image comprises at least one pixel, and described pixel is the minimum drawing unit of image, and the color unification in each pixel changes.

In the prior art, the versicolor method of pixel is for to be divided into several regions with a pixel according to color, the color of a regional interior pixel is identical, when carrying out colour switching, generates new color according to the synthetic principle of RGB color original color in each zone is replaced.By this method as can be seen, when needing to comprise color transition (being that color produces gradual change) regional in certain pixel, seamlessly transitting when reaching the conversion of pixel integral color needs to divide careful zone, makes in the colour switching process loaded down with trivial details.With the recreation is example, if certain role's equipment comprises five kinds of colors, the linking of five kinds of colors partly needs to carry out with intermediate color, be that the convergence part branch has comprised that a kind of color is to a plurality of colors between the another kind of color, when this role's equipment is carried out colour switching, zone for five kinds of colors, can directly use other colors to cover, yet for being connected part, be difficult to the zone of careful each transition color of division, therefore often can only carry out conversion to minority transition color, the transition color that has caused being connected part reduce and the zone between tangible edge, influence the attractive in appearance of pixel.

From the above mentioned, in order to guarantee seamlessly transitting of picture element colour, simultaneously in order to reduce color transformed fussy degree, in the prior art, usually use still image, promptly need each color of conversion all to be saved in the system, when needs carry out pixel color transformed, load the pixel file of corresponding color as a pixel file to a pixel.This method has caused resource capacity huge.

In sum, the defective of prior art is that difficult realization comprises the colour switching of the pixel of intermediate color; On the other hand, in the picture element colour conversion, reach the effect of intermediate color smooth gradual change if desired, then need to divide the filling that color is carried out in finer zone; In order to guarantee the processing speed of system, cause needs to increase a large amount of pixel files and be saved in the program simultaneously, make calling program take more resource, also increased technician's workload simultaneously.Especially in recreation, also can make troubles to the player.

Summary of the invention

The method that the purpose of this invention is to provide a kind of dynamic changing picture element colour can be carried out colour switching to the pixel with high quality color transition, and do not increased system loading or reduce color transformed treatment effeciency.Accordingly, the present invention also provides a kind of method of dynamic mapping color of image.

For solving the problems of the technologies described above, the invention provides a kind of method of dynamic changing picture element colour, comprising: 1) pixel is loaded into internal memory, is included in the color of preserving pixel in the internal memory; 2) ask when color transformed, the tone value HUE under the HLS pattern adjusts to picture element colour; 3) color value that will adjust the back pixel is the RGB pattern by the HLS mode switch, and shows.

The picture element colour of preserving during preferably, with the loading pixel is as benchmark; When the request colour switching, the HUE value of described benchmark under the HLS pattern adjusted certain angle, to obtain requested color.

On the said method basis, preserve the value of picture element colour under the RGB pattern; And, ask the value of color RGB pattern to be converted to the value of HLS pattern, and then to carry out adjustment when color transformed to the HUE value.And can further preserve picture element colour after color transformed; And, if internal memory is full, then discharge untapped at most memory block, in order to preserve newly-generated picture element colour.Preferably, further write down the HUE value of pixel after the colour switching.

On the said method basis, 2) in further comprise judge according to the HUE value whether requested picture element colour has been stored in internal memory, if then call and carry out pixel output, otherwise carry out the adjustment of HUE value.Preferably, the present invention adopts memory pool technique to create storage allocation, is used to preserve picture element colour.And, adopt the palette form to preserve picture element colour.

The present invention also provides a kind of employing method of the dynamic mapping color of image of method according to claim 1, and comprising: load image is preserved the color of each pixel in the image respectively in internal memory; During the requested image colour switching, adjust the tone value HUE of each picture element colour under the HLS pattern in the image respectively; Is the RGB pattern with the color value of adjusting the back pixel by the HLS mode switch, and shows.

On the said method basis, further comprise: further comprise during the requested image colour switching and determine the required pixel that carries out colour switching, and the tone value size of the required adjustment of those pixels.

Above technical scheme as can be seen, it is color transformed to have adopted the HLS pattern to carry out among the present invention, described HLS comprises tone (HUE), saturation degree (Saturation) and three elements of brightness (Lightness), generally, revise the tone value in the HLS pattern, and do not change intensity value and brightness value can be realized color change; And for the RGB pattern, based on the principle of RGB, the pixel color is when carrying out conversion, and R, G, three parameters of B are being carried out conversion in certain proportion, and this ratio is not easy to obtain, and three parameters are all carrying out conversion, thereby calculated amount is big in the dynamic color conversion.Based on above-mentioned explanation, only promptly realized the conversion of pixel color among the present invention by the tone value under the change HLS pattern, thereby improved the versicolor efficient of pixel, generally speaking, because the physical arrangement of graphoscope is followed the RGB pattern, thereby has adopted the RGB pattern to carry out display process among the present invention.And then, because the present invention improved the color transformed efficient of pixel, thereby make and needn't in system, preserve versicolor same pixel file in advance, reduced system loading.On the other hand, because the color transformed unification of same pixel is carried out, all pixel tone values (HUE) carry out the increase or the minimizing of identical value in the same pixel, thereby be not subjected to the restriction of zoning among the present invention, thereby, on above-mentioned beneficial effect basis, the present invention has realized the colour switching to high quality color transition pixel.

Further, generally speaking, because the physical arrangement of graphoscope is followed the RGB pattern, thereby the present invention adopts the RGB pattern when preserving color of image; In order to save storage space, also used the palette form to be used to write down picture element colour among the present invention.

Further,, among the present invention the color after the pixel conversion is preserved, when the color of current request has been saved in the internal memory, then can directly call in order further to improve the efficient of picture element colour dynamic mapping; Simultaneously based on not using obsolescence principle to preserve the palette of some at most, with control EMS memory occupation space.Further, recommend to use memory pool technique to create the allocation buffer among the present invention and be used to preserve picture element colour, adopt memory pool technique to can further improve the treatment effeciency of system.

The present invention also provides a kind of method that adopts the dynamic mapping color of image of above-mentioned picture element colour transform method, accordingly, this method realized having the color transformed of high quality color transfer image acquisition, and improved system handles efficient, reduced system loading.

Description of drawings

Fig. 1 is a HLS color mode schematic diagram;

Fig. 2 is an embodiment of the invention process flow diagram.

Embodiment

Relate to conversion among the present invention to image rgb color pattern and HLS color mode.

Described RGB pattern is current color synthesis model commonly used, and nearly all mapping software and image demonstration have all adopted RGB pattern, its advantage to be to handle conveniently, and it is little to take up room.RGB represents red (R), green (G), blue (B) three kinds of colors respectively, and in spectrum colour, these three kinds of colors are the most responsive colors of human eye, can blend together most colors, otherwise most colors also can be decomposed into redgreenblue, promptly so-called three primary colors principle.Mix by the red, green, blue addition, be called the rgb color pattern with the color synthesis mode of obtaining other colors.All between 0 to 255, for example, (0,0,0) is shown as white for R, G, these three parameter range of B, and (255,255,255) show black.

Described HLS pattern is a kind of color mode of the most approaching reality custom, meets general user's color adjustment custom.HLS is made up of three key elements, i.e. form and aspect or tone (HUE), brightness (Lightness), saturation degree (Saturation).Form and aspect (tone) are the most basic attributes of color, i.e. the color gamut of color, and each color in the spectrum all is a kind of form and aspect, between the purple, can define the form and aspect of any amount in redness.Figure 1 shows that HLS pattern schematic diagram.Ordinate is represented brightness (L, Lightness), horizontal ordinate is represented saturation degree, and (S, Saturation), circular arc is represented form and aspect (tone), and (H Hue), is turned an angle along circular arc, and color is realized uniform conversion transition among the figure.

Based on above-mentioned explanation as can be known,, revise the conversion that tone value can be realized color,, promptly realize the conversion of image color by adjusting arc angle promptly with reference to Fig. 1 for the HLS pattern; And for the RGB pattern, if need color to carry out conversion, R, G, these three parameters of B are in conversion with a ratio, this ratio difficulty is obtained, and three parameter values are all changing, and then makes troubles in implementation procedure, therefore, it is color transformed that one of key point of the present invention is to adopt the HLS pattern to carry out, and by changing parameter value of tone, just can realize the conversion of color.

Pixel is made up of pixel, the color correspondence of each pixel be a color of the current color palette, one secondary pixel is carried out when color transformed, need change the color of all pixels inside this width of cloth pixel, be actually all colours conversion in the current color palette saved as another palette, and newly-generated palette as the employed palette of current pixel.Core of the present invention is, in the process of described conversion, the value under the RGB pattern of each color in the current color palette is converted to the HLS value, and the HLS value reaches the purpose of turn colors by the H value is made amendment; And, for the present invention can compatible current majority display technique, thereby convert HLS under the corresponding RGB pattern value, and show.

The conversion formula of described HLS and RGB is as follows:

1) by of the conversion of HLS pattern to the RGB pattern:

HLSRGB

$\mathrm{MAX}=\left\{\begin{array}{cc}L\×(1+S)& L\≤0.5\\ L\×(1-S)+S& L>0.5\end{array}\right.$

MIN＝2×L-MAX

S＝0

R＝G＝B＝L

S≠0

h＝H+120

h＝h-360 h≥360

$R=\left\{\begin{array}{cc}\mathrm{MIN}+(\mathrm{MAX}-\mathrm{MIN})\&times;h/60& 0\&le;h<60\\ \mathrm{MAX}& 60\&le;h<180\\ \mathrm{MIN}+(\mathrm{MAX}-\mathrm{MIN})\&times;(240-h)/60& 180\&le;h<240\\ \mathrm{MIN}& 240\&le;h<360\end{array}\right.$

h＝H

$G=\left\{\begin{array}{cc}\mathrm{MIN}+(\mathrm{MAX}-\mathrm{MIN})\&times;h/60& 0\&le;h<60\\ \mathrm{MAX}& 60\&le;h<180\\ \mathrm{MIN}+(\mathrm{MAX}-\mathrm{MIN})\&times;(240-h)/60& 180\&le;h<240\\ \mathrm{MIN}& 240\&le;h<360\end{array}\right.$

h＝H-120

h＝h+360 h＜0

$G=\left\{\begin{array}{cc}\mathrm{MIN}+(\mathrm{MAX}-\mathrm{MIN})\&times;h/60& 0\&le;h<60\\ \mathrm{MAX}& 60\&le;h<180\\ \mathrm{MIN}+(\mathrm{MAX}-\mathrm{MIN})\&times;(240-h)/60& 180\&le;h<240\\ \mathrm{MIN}& 240\&le;h<360\end{array}\right.$

2) by of the conversion of RGB pattern to the HLS pattern

RGBHLS

MAX＝max(R，G，B)

MIN＝min(R，G，B)

L＝(MAX+MIN)/2

MAX＝MIN

S＝0

H＝0

MAX≠MIN

$S=\left\{\begin{array}{cc}(\mathrm{MAX}-\mathrm{MIN})/(\mathrm{MAX}+\mathrm{MIN})& L\&le;0.5\\ (\mathrm{MAX}-\mathrm{MIN})/(2-\mathrm{MAX}-\mathrm{MIN})& L>0.5\end{array}\right.$

Cr＝(MAX-R)/(MAX-MIN)

Cg＝(MAX-G)/(MAX-MIN)

Cb＝(MAX-B)/(MAX-MIN)

$H=\left\{\begin{array}{cc}\mathrm{Cb}-\mathrm{Cg}& R=\mathrm{MAX}\\ 2+\mathrm{Cr}-\mathrm{Cb}& G=\mathrm{MAX}\\ 4+\mathrm{Cg}-\mathrm{Cr}& B=\mathrm{MAX}\end{array}\right.$

H＝60×H

H＝H+360 H＜0

Following reference process flow diagram shown in Figure 2 illustrates preferable implementation of the present invention.

Initialization figure prime information may further comprise the steps.

21: load pixel.This step can specific to: judge whether this pixel has been kept in the internal memory, if, direct execution in step 26 after receiving the picture element colour conversion requests then, if being requested pixel is not kept in the internal memory, then further judge whether current internal memory remaining space is enough, carry out the step that bufcreates if then forward step 22 to, if not, then eliminate the untapped at most pixel of preserving in the memory headroom, with the releasing memory space, and then execution in step 22.

22: bufcreate, recommend to adopt the technology of memory pool in internal memory, to distribute among the present invention and bufcreate.Except that memory pool technique, also can adopt NEW or malloc dynamically to apply for internal memory.Usually, when adopting NEW or malloc dynamically to apply for internal memory, a spot of operation can not cause harmful effect, if but frequently apply for the operation of memory block, then can cause the loss on the system handles efficient, What is more, if cause the existence of memory fragmentation, thereby further influences the efficient of system.Based on above-mentioned consideration, adopt memory pool technique among the present invention, a little bigger memory block of promptly disposable application just distributes one to use when needing at every turn, just removes to apply for new memory block when this memory block is not enough.Normal conditions, memory pool technique are applicable to the application of the memory block of each application fixed size more.Adopt memory pool technique in the preferred embodiment of the present invention, yet do not constitute the restriction of the present invention being adopted other internal memory operation techniques.

23: create palette,, use palette format record pixel color in the present embodiment in order to reduce operand.Described palette exists with the form of array, writes down 256 kinds of colors, promptly in the secondary pixel 256 kinds of colors is arranged at most, and 256 kinds of color relations that each color conversion only need be calculated in the palette are passable.Every kind of color in the palette all has a numbering, to reach the uniquely identified purpose, a numbering in the corresponding palette of the color code of each pixel, pixel carries out when color transformed, the numbering of the palette of the current use of pixel is changed to newly-generated palette numbering, but the numbering in the palette of each pixel correspondence and constant is carried out when color transformed, 256 kinds of colors in the current color palette are carried out color transformed calculating, thereby generate a new palette and be saved.

Palette and buffer zone exist and exist along with pixel, promptly have only when drawing pixel, palette and buffer zone can be created in internal memory, if pixel need not draw in next display frame, then palette and the buffer zone created of this pixel is released.

Because the form and aspect that human eye can obviously be distinguished are 7, the pixel color carries out conversion between these 7 form and aspect, can enrich visual experience.Therefore, in the present embodiment for each pixel is provided with 7 palettes, numbering from 0 to 6 is in order to sign.But the present invention also is not intended to the quantity that restriction is provided with palette.In order further to reduce operand,, in order to saving palette, and, keep nearest used 8 palettes in buffer zone according to not using obsolescence principle at most for each pixel is created 8 buffer zones in internal memory.And then majority is color transformed only to comprise computation process when using for the first time, when the color of asking conversion is once more preserved in buffer zone, then can directly call and show output, makes and has further reduced system's operand.

24: the default palette is set, and is saved in the buffer zone, because present embodiment when carrying out color conversion calculations, is a benchmark with the default palette, so the default palette is kept in the buffer zone always, no longer is shown up to this image.Setting is numbered 0 palette attribute, comprises deflection angle (being the Hue value), the value of color in the palette of the color correspondence of each picture element in last service time, the image.It below is a palette data structure.

struct?Pal

{

int_last_ref_time；

int?hue；

int?palate[256]；

}

Wherein, the time that intlast_ref_time is used for the last time for this palette, whether do not use for a long time in order to identify this palette; Int hue is the HUE value deflection angle of benchmark with the default palette when this palette of colors conversion, when carrying out colour switching, can judge whether the color of current request is kept in the buffer zone according to the record of int hue, and then determine whether to need to calculate the new palette of generation or directly from buffer zone, call; Int palate[256] be this palette data, thus quoted the drafting that realizes pixel by each pixel in the pixel.

25: draw pixel, shown below is the data structure of a pixel object.

class?Image

{

Pal?extPal[8]；

int?width；

int?height；

void*?pImageData；

int?findPal(hue)；

int?getPal(hue)；

}

By this example as can be known, comprised the palette that calls in the attribute of a pixel, the following palette numbering that is designated as of palette array; The height of this pixel and width; The tone value of this pixel.

According to known HUE value, request is carried out color conversion to present image, may further comprise the steps.

26: the traversal buffer zone, judge that according to the HUE value whether the palette with this HUE value is saved, and then carry out step 27 if preserve, otherwise carry out step 28.

27: return the palette numbering, realization is called this palette, and, revise the numbering of drawing the used palette of current pixel, be the current time the last service time of revising this palette; Carry out step 212, draw pixel.

28: the traversal buffer zone, judge whether idle buffer zone, carry out 210 if having then, otherwise carry out 29.

29: the palette data structure is provided as mentioned,, eliminates untapped at most palette, the releasing memory space according to the attribute of the time that wherein is called recently; Since carried out in the present embodiment color transformed be benchmark all with described the default palette, the HUE value is adjusted, thereby, do not use the inapplicable the default palette of obsolescence principle at most described in this step, described the default palette is kept in the buffer zone always, till pixel does not show in next one demonstration circulation.

One example below is provided, and imbody step 26 is to the processing procedure of step 29.

　　 int Image∷getPal(int hue)　　 {　　  int find＝findPal(hue)　　  if(find＝＝0)　　  {　　   int def_ref_time＝0；　　   int found＝0；　　   int i＝0；        <!-- SIPO <DP n="10"> -->        <dp n="d10"/>　　  for(i＝1；i＜8；i++)　　  {　　   if(extPal[i].hue＝＝0)　　   {　　    break；　　   }　　   elseif(extPal[i]ast_ref_ime＞def_ref_time)　　   {　　    def_ref_time＝extPal[i].last_ref_time；　　    fount＝i；　　   }　　  }　　  find＝(i＜8)？i：found；　　  convPal(extPal[0]，extPal[find])　　 }　　 extPal[find].last_ref_time＝time()；　　 retum find；　　}

210: with the default palette is benchmark, recomputates 256 color values in the palette; Concrete, be the HLS pattern with each color value in the default palette by the RGB mode switch, obtain the color value under the HLS pattern after, tone (HUE) value is wherein adjusted, i.e. the increase of certain angle or minimizing is with the color that can obtain to be asked.

211: the palette that will newly calculate generation is saved in current buffer zone, and the color value that is saved in buffer zone adopts the RGB pattern.Wherein the method for mutually conversing of palette of colors value RGB pattern and HLS pattern repeats no more with reference to above explanation.

212: show the output pixel.

The example of drawing pixel below is shown.

Void DrawImage (" name ", hue) // the pixel title, the HUE value of color correspondence

{

Image﹠amp; AImage=findImageByName (" name ") // judge whether at internal memory according to the pixel title

Int palIdx=aImage.getPal (hue) // call palette according to tone value

CopyToScreen (aImage.pData, aImage.extPal[palIdx]) // the output demonstration

}

In illustrated embodiment above, the benchmark of the default palette as colour switching is set, make that the adjustment of tone value is more flexible, colour switching is more flexible; Yet, described the default palette can be set equally as changing HUE value standard among the present invention, as long as when carrying out colour switching, know the deflection angle between the HUE value between each palette, can realize colour switching equally.The advantage of RGB pattern as indicated above, the foregoing description adopts the value of RGB pattern when preserving the pixel palette of colors, yet the present invention also is not precluded within the mode that adopts the HLS mode value when preserving picture element colour, and then should be the RGB pattern with the HLS mode switch before showing the output pixel.

The present invention also provides a kind of method of dynamic mapping color of image, and this method has adopted the method for dynamic changing picture element colour of the present invention.Its core is: create pixel to constitute complete image, the color of preserving each pixel respectively; During the requested image colour switching, determine the required pixel that carries out colour switching, and the tone value size of the required adjustment of those pixels, and then adjust the tone value HUE of picture element colour under the HLS pattern in the image respectively; Is the RGB pattern with the color value of adjusting the back pixel by the HLS mode switch, and shows.

When the colour switching that realizes image, still be that unit carries out colour switching respectively, and adopt the method for dynamic changing picture element colour of the present invention with the pixel, promptly comprise the mutual conversion of HLS pattern color value and RGB mode value, to the step of the adjustment of HUE value; And also further the application memory pool technology bufcreates, and adopts the palette form data that save colors, and adopts and eliminates at most to using palette mechanism allocation buffer etc., and the specific implementation step please refer to explanation above, repeats no more.

More than describe the method for dynamic changing picture element color of the present invention and the method for dynamic mapping image color in detail, this method is particularly useful for the demonstration of the image of 2D recreation, yet this paper does not limit this The Application of Technology field.

More than the method for dynamic changing picture element color provided by the present invention and the method for dynamic mapping image color are described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (10)

1, a kind of method of dynamic changing picture element colour is characterized in that:

1) pixel is loaded into internal memory, is included in the color of preserving pixel in the internal memory;

2) ask when color transformed, the tone value HUE under the HLS pattern adjusts to picture element colour;

3) color value that will adjust the back pixel is the RGB pattern by the HLS mode switch, and shows.

2, the method for dynamic changing picture element colour as claimed in claim 1 is characterized in that:

The picture element colour of preserving during with the loading pixel is as benchmark; When the request colour switching, the HUE value of described benchmark under the HLS pattern adjusted certain angle, to obtain requested color.

3, the method for dynamic changing picture element colour as claimed in claim 1 or 2 is characterized in that:

Preserve the value of picture element colour under the RGB pattern; And,

Ask the value of color RGB pattern to be converted to the value of HLS pattern, and then to carry out adjustment when color transformed to the HUE value.

4, the method for dynamic changing picture element colour as claimed in claim 3 is characterized in that, also comprises: preserve the picture element colour after color transformed; And,

If internal memory is full, then discharge untapped at most memory block, in order to preserve newly-generated picture element colour.

5, the method for dynamic changing picture element colour as claimed in claim 4 is characterized in that: the HUE value that further writes down pixel after the colour switching.

6, as the method for claim 1 or 5 described dynamic changing picture element colours, it is characterized in that:

2) further comprise in judge according to the HUE value whether requested picture element colour has been stored in internal memory, if then call and carry out pixel output, otherwise carry out the adjustment of HUE value.

7, the method for dynamic changing picture element colour as claimed in claim 4 is characterized in that: adopt memory pool technique to create storage allocation, be used to preserve picture element colour.

8, the method for dynamic changing picture element colour as claimed in claim 1 is characterized in that: adopt the palette form to preserve color of image.

9, a kind of employing method of the dynamic mapping color of image of method according to claim 1 is characterized in that: load image is to internal memory,, the color of preserving each pixel in the image respectively;

During the requested image colour switching, adjust the tone value HUE of picture element colour under the HLS pattern in the image respectively;

Is the RGB pattern with the color value of adjusting the back pixel by the HLS mode switch, and shows.

10, the method for dynamic mapping color of image as claimed in claim 9 is characterized in that:

Further comprise during the requested image colour switching and determine the required pixel that carries out colour switching, and the tone value size of the required adjustment of those pixels.

Images