Video dynamic range analysis
A video analyzer measures and outputs a visual indication of a dynamic range of a video signal. The video analyzer includes a video input to receive the video signal and a cumulative distribution function generator generates a cumulative distribution function curve from a component of the video signal. A feature detector generates one or more feature vectors from the cumulative distribution function curve and a video dynamic range generator produces a visual output indicating a luminance of one or more portions of the video signal.
1. A video analyzer for measuring dynamic range of a video signal, comprising:
a video input structured to receive the video signal;
a cumulative distribution function generator structured to generate a cumulative distribution function curve from a component of the video signal;
a feature detector structured to generate one or more feature vectors from the cumulative distribution function curve; and
a video dynamic range generator structured to produce a visual output indicating a luminance of one or more portions of the video signal based on the one or more feature vectors.
2. The video analyzer according to claim 1 , wherein the visual output includes a pseudo-color image indicating the luminance of one or more portions of the video signal.
3. The video analyzer according to claim 1 , wherein the visual output includes a waveform indicating a luminance versus percentage of screen area for a single frame of the video signal.
4. The video analyzer according to claim 3 , wherein the visual output includes a power mask for a particular display displayed concurrently with the waveform.
5. The video analyzer according to claim 1 , wherein the visual output includes an average luminance of each frame of at least a portion of the video signal.
6. The video analyzer according to claim 5 , wherein the visual output further includes a maximum average luminance for a particular display.
7. The video analyzer according to claim 6 , wherein the visual output further includes a minimum average luminance for a particular display.
8. The video analyzer according to claim 7 , wherein the visual output further includes an optimal maximum luminance and an optimal minimum luminance for a particular display.
9. The video analyzer according to claim 1 , wherein the visual output is generated and displayed in real-time or near real-time.
10. A method for measuring dynamic range of a video signal, comprising:
generating a cumulative distribution function curve from a component of the video signal;
generating one or more feature vectors from the cumulative distribution function curve; and
producing a visual output indicating a luminance of one or more portions of the video signal based on the one or more feature vectors.
11. The method according to claim 10 , wherein the visual output includes a pseudo-color image indicating the luminance of one or more portions of the video signal.
12. The method according to claim 10 , wherein the visual output includes a waveform indicating a luminance versus percentage of screen area for a single frame of the video signal.
13. The method according to claim 12 , wherein the visual output includes a power mask for a particular display displayed concurrently with the waveform.
14. The method according to claim 10 , wherein the visual output includes an average luminance of each frame of at least a portion of the video signal.
15. The method according to claim 14 , wherein the visual output further includes a maximum average luminance and a minimum average luminance for a particular display.
16. The method according to claim 10 in which producing a visual output indicating a luminance of one or more portions of the video signal comprises producing a visual output in real-time or near real-time.
17. One or more computer storage media comprising instructions, which, when executed by one or more processors of a video analyzer, cause the video analyzer to:
generate a cumulative distribution function curve from a component of the video signal;
produce one or more feature vectors from the cumulative distribution function curve; and
generate a visual output indicating a luminance of one or more portions of the video signal based on the one or more feature vectors.
18. The one or more computer storage media according to claim 17 , further comprising instructions to cause the video analyzer to generate a visual output that includes a pseudo-color image indicating the luminance of one or more portions of the video signal.
19. The one or more computer storage media according to claim 17 , further comprising instructions to cause the video analyzer to generate a visual output that includes a waveform indicating a luminance versus percentage of screen area for a single frame of the video signal.
20. The one or more computer storage media according to claim 17 , further comprising instructions to cause the video analyzer to generate a visual output that includes a power mask for a particular display displayed concurrently with the waveform.