Do you think....

[redman]

that someday there will be a sensor developed that can somehow focus its resolution. When using a 35mm sized sensor alot of the image is usually out of focus, obviously it depends on the circumstances, but it seems that way when viewing red footage. In the future do you think they could make a sensor that could focus its resolution onto whats in focus leaving less resolution for the out of focus areas. It doesn't seem like out of focus areas really need as much resolution, because people won't be looking there anyway.It would probobly call for a complete redesign of creating sensors, but maybe it could happen.

Just a thought

 

[Kevin Halverson]

Actually, any adaptive compression scheme already does this to a degree. When there is less high frequency content and more entropy, there is less burden on the compression. If the system is adaptive, it will either be able to compress the image to a smaller size (while maintaining the same quality) or it will have higher quality (when maintaining the output data rate).

Kevin Halverson

 

[Radoslav Karapetkov]

Interesting thought, but I believe that such kind of "moving" pixels would be very difficult to achieve technically. At least for now.

With digital cinematography and compression, I think what Kevin said does the trick to a certain degree.

 

[Dj Joofa]

that someday there will be a sensor developed that can somehow focus its resolution. When using a 35mm sized sensor alot of the image is usually out of focus, obviously it depends on the circumstances, but it seems that way when viewing red footage. In the future do you think they could make a sensor that could focus its resolution onto whats in focus leaving less resolution for the out of focus areas. It doesn't seem like out of focus areas really need as much resolution, because people won't be looking there anyway.It would probobly call for a complete redesign of creating sensors, but maybe it could happen.

Just a thought

There is already work done on similar issues. Please do an internet search for the following terms: "foveation", "compression".

Foveation-based compression is used to figure out where a human eye will put more emphasis, and hence, selectively give more resolution to "important" parts of an image.

 

[Dj Joofa]

Actually, any adaptive compression scheme already does this to a degree. When there is less high frequency content and more entropy, there is less burden on the compression. If the system is adaptive, it will either be able to compress the image to a smaller size (while maintaining the same quality) or it will have higher quality (when maintaining the output data rate).

Kevin Halverson

Adaptive compression does that on purely signal processing based parameters, such as SAD, etc., and not in regard to (higher-level) image content, i.e., object based (i.e., higher level vision) as opposed to pixel-based (i.e., lower-level signal processing). Other techniques, like I the ones I mentioned in the previous post, such as Foveation-based compression try to do that on image content-basis.

 

[Kevin Halverson]

Adaptive compression does that on purely signal processing based parameters, such as SAD, etc., and not in regard to (higher-level) image content, i.e., object based (i.e., higher level vision) as opposed to pixel-based (i.e., lower-level signal processing). Other techniques, like I the ones I mentioned in the previous post, such as Foveation-based compression try to do that on image content-basis.

My comments on the nature of an adaptive approach to compression directly addressed the original posters comment about "...out of focus..." areas. Those areas of the image will lack high frequency energy and will exhibit larger entropy based upon the softness of the image. While not the direct intent of the imager itself, the overall system does exhibit a bit of his desired approach.

The intent of "Foveation" or any perceptual model system is to adapt the application of processing to areas of greater perceived value; this is also a form of adaptive compression in that the processing is not uniformly applied.

Kevin Halverson

 

[Dj Joofa]

My comments on the nature of an adaptive approach to compression directly addressed the original posters comment about "...out of focus..." areas. ...

Kevin Halverson

Agree with you. You are right.