test method:
I took a completely black photograph at night in a dark room on my Canon 1200D with a lens cap on to capture an absolute black image. this image was later put into post processing software to show the peak blacks. the following image is the result, ofcourse the remainder of the image is the noise in the image.
later I repeated the same test with my iPhone 11 and got a completely abstract noise pattern. the white sections being the noise and the black sections being the complete black.
the Canon shot in RAW and gave a natural noise pattern (highly compressed may I add) whilst the IPhone shot in JPEG and gave blocks of noise...
I'm assuming that I'm looking at noise due to the fact that both photos were taken in absolute darkness.
can anyone help explain the result from the iPhone? is it due to the fact that it had been shot in JPEG or is there another factor I am unaware of?
I used some PSNR software to determine the noise level also but it pinged back with a decimal number which I don't know how to interpret?? any helpful links or advice?
this is part of my university assessment if you are curious... any help would be greatly appreciated.
many thanks
Bradley.
I took a completely black photograph at night in a dark room on my Canon 1200D with a lens cap on to capture an absolute black image. this image was later put into post processing software to show the peak blacks. the following image is the result, ofcourse the remainder of the image is the noise in the image.
later I repeated the same test with my iPhone 11 and got a completely abstract noise pattern. the white sections being the noise and the black sections being the complete black.
the Canon shot in RAW and gave a natural noise pattern (highly compressed may I add) whilst the IPhone shot in JPEG and gave blocks of noise...
I'm assuming that I'm looking at noise due to the fact that both photos were taken in absolute darkness.
can anyone help explain the result from the iPhone? is it due to the fact that it had been shot in JPEG or is there another factor I am unaware of?
I used some PSNR software to determine the noise level also but it pinged back with a decimal number which I don't know how to interpret?? any helpful links or advice?
this is part of my university assessment if you are curious... any help would be greatly appreciated.
many thanks
Bradley.
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