Methods and systems for display source light management with histogram processing

FIELD: physics.

SUBSTANCE: disclosed is a method of selecting the display source light illumination level involving the following sequence of actions. Calculating a luminance channel from three-colour-channel image data for an input image. Calculating a compound colour channel from the three-colour-channel image data. Generating a two-dimensional histogram from the luminance channel and the compound colour channel. Converting the two-dimensional histogram to a one-dimensional histogram. Determining a performance factor using the one-dimensional histogram. Selecting the display source light illumination level based on the performance factor.

EFFECT: higher source light intensity or higher image quality at a fixed source light illumination level, improved dynamic range of specific image frequency bands, gray gradations and other parts of the image.

20 cl, 119 dwg

 

The text descriptions are given in facsimile form.

1. The way to select the level of source light illumination of the display screen, the said method comprises the steps are:
a) calculate the luminance channel of the image data of the three color channels of the input image;
b) calculate the composite color channel of the above-mentioned image data of the three color channels;
c) form a two-dimensional histogram of the above-mentioned luminance channel and the above-mentioned composite color channel; and
d) convert the mentioned two-dimensional histogram in a one-dimensional histogram is the exploits of the summation of the values in the histogram on the diagonal lines of the summation;
e) determine the index of performance using the one-dimensional histogram; and
f) choose the level of source light illumination on the basis of the indicator of performance.

2. The method according to claim 1, additionally containing phase, which reads the parameter weighting factor color, which sets the slope of the above line summation.

3. The method according to claim 1, in which the mentioned composite color channel is chroma channel.

4. The method according to claim 1 in which the said channel is calculated using the following equation:
Y=0,29R+0,59G+0,12B.

5. The method according to claim 3, in which the aforementioned chroma channel is calculated using the following equation:
C=max(R-Y,G-Y,B-Y).

6. The method according to claim 1, additionally containing a stage at which change the dynamic range of the aforementioned one-dimensional histograms using linear scaling.

7. The method according to claim 1, additionally containing a stage at which weighed mentioned one-dimensional histogram with error vector to obtain a measure of performance.

8. The way to select the level of source light illumination of the display screen, the said method comprises the steps are:
a) calculate the luminance channel of the image data of the three color channels of the input image;
b) in chislet composite color channel of the above-mentioned image data of the three color channels;
c) form a two-dimensional histogram of the above-mentioned luminance channel and the above-mentioned composite color channel;
d) convert the mentioned two-dimensional histogram in a one-dimensional histogram by summing the values in the histogram on the diagonal lines of the summation;
e) use the mentioned one-dimensional histogram to create a model of the display;
f) form the error vector using said model display;
g) is weighed mentioned one-dimensional histogram using the vector of errors;
h) determine the index of performance using the weighted one-dimensional histogram; and
i) choose the level of source light illumination on the basis of the indicator of performance.

9. The method of claim 8, further containing phase, which reads the parameter weighting factor color, which sets the slope of the above line summation.

10. The method according to claim 8, in which the mentioned composite color channel is chroma channel.

11. The method of claim 8 in which the said channel is calculated using the following equation:
Y=0,29R+0,59G+0,12B.

12. The method according to claim 10, in which the aforementioned chroma channel is calculated using the following equation:
C=max(R-Y,G-Y,B-Y).

13. The method of claim 8, further containing phase, n is which alter the dynamic range of the aforementioned one-dimensional histograms using linear scaling.

14. The method of claim 8, further containing a stage at which weighed mentioned one-dimensional histogram with error vector to obtain a measure of performance.

15. The method of claim 8 in which the said formation error vector contains the stage, which determines the limits of the cut-off in the model.

16. The method of claim 8, further containing phase, which form a curve adjustment tone scale images based on the said selected source light illumination.

17. The way to select the level of source light illumination of the display screen, the said method comprises the steps are:
a) form a two-dimensional histogram of the luminance channel and the composite color channel;
b) convert the mentioned two-dimensional histogram in a one-dimensional histogram by summing the values in the histogram on the diagonal lines of the summation;
c) accept the aforementioned one-dimensional histogram in conversion module containing a map that associates the image feature with the model attribute display;
d) determine the characteristics of the image based on the said one-dimensional histogram;
e) determine the model attribute of the display, which is associated with the mentioned characteristics of the image, use the card and the above-mentioned module transformations the Finance;
f) forming a display model on the basis of the model attribute display;
g) calculate the bounds of the clipping in the model for the mentioned model display;
h) calculate the error vector display for each of the many levels of the source light illumination;
i) combine the above-mentioned vectors error display with the said one-dimensional histogram to determine the value of distortion for the above-mentioned multiple levels of source light illumination; and
j) choose the level of source light illumination on the basis of the distortion values.

18. The method according to 17, further containing phase, which reads the parameter weighting factor color, which sets the slope of the above line summation.

19. The method according to 17, in which the mentioned composite color channel is chroma channel.

20. The method according to 17, further containing a stage at which change the dynamic range of the aforementioned one-dimensional histograms using linear scaling.



 

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20 cl, 120 dwg

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