Answer: Progressive rendering is the alternate fixed length rendering where u access the amount of computational effort that go into rendering image. Fixed length is important for use animation when still images is continuously better paradigm is progressive rendering. Where the image is process over time, and rendering is stopped at any point you think good look ( you press F5 for updating the image).
Sampling level metric:
A useful indicator of image quality is the sampling metric , which is define base 2 logarithm of the number of per pixels in the rendering image . lets break apart this is very helpful to understand this situation.
· Contributions Per pixel:
The ISF algorithm is Performed number of iterations, however not all of these iterations produce contribution to the image quality is zoom or small.
· Logarithmic or linear contributions per pixel:
The logarithmic captures growing work required for equal perceptual difference steps in image.
When rendering for 10 seconds the 1 second extra produce make a big difference,
But 20 seconds is totally different noticeably , an extra sound is drop the amount of work already expended and can’t till 40 seconds that is update image after processing. This process continues which level were on and algorithm is function does.
Rediscovering Progressive HTML rendering:
Progressive html rendering is a old technique that is used to improve websites but it has been lost a whole new class of web application. This is simple way the web browser is a head the starting downloading and rendering the page multiple times.
Without progressive html rendering:
If a page does not use progressive Html rendering have a slow time because the bytes will not respond complete html response built. After the client receives the final html it can be need additional resources can be downloaded such as (CSS, Java, font, images) and download the external resources will required round tips.
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