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Old Apr 6, 2003, 7:06 PM   #1
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Default still image resolution

This is a newbie question, please forgive me. When looking at the FinePix S602, I am confused by some of the specifications... I understand that it is a 3.3 megapixel camera, but what does "still image resolution" mean...at the highest resolution (2832 x 2128 (6M)), what does the 6M refer to? I thought it might mean the size of the file, but that appears to be 18 mg in the fine mode. Please help...Thanks
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Old Apr 7, 2003, 8:44 AM   #2
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6Mpix refers to the pixels but Red Green and Blue take up about 1 Byte each, so 6Mpix becomes about 18Mbyte. Of course on the 602 you are refering to the TIFF uncompressed output.

Compressed JPEG file sizes will depend on the amount of compression the camera applies in each of its modes.

Don't forget that 6Mpix on a 602, is 'derived' or 'digitally interpolated' from a special shape of 3M physical pixels on the ccd sensor.

Shooting TIFF on a 602 (6Mpix HIGH) is not for regular shots. You will find the camera slows down writing such big files to the card, and you risk freezes and long waits. Stick with the 6Mpix FINE, that's about 2Mb compressed JPEG.
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Old Apr 7, 2003, 7:46 PM   #3
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Thank you very much for your explanation.
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Old Apr 7, 2003, 8:57 PM   #4
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Note that all conventional(foveon excluded) digital cameras interpolate their captured data in order to extrapolate an image. Megapixel rating is more of a marketing term, similar to 'watts' on stereo systems. Their are many more variables:

-lens
-image processor
-sensor technology

The s602 is a 3 megapixel camera. Yet, it resolves higher measured extinction resolutoin than any 4 megapixel camera and almost the same as prosumer class 5mp cameras on controlled target tests . This is merely a result of the Fuji CCD and processor design yeilding slightly higher efficiency than the convential ccd and cmos sensors. Megapixel count does not mean you actually get one true combined R, G, B composite pixel each photosite present on the camera. Note the Foveon sensore, which has a higher efficiency then any other optical sensors, but this 3.5mp camera actually has 3x that number of actual senors though, one for each R, G, B value. The Sigma Foveon 3.5megapixel camera yeilds resoluton captures surpassing 5mp converntoanl ccd and cmos sensors, as demonstrated by objective resolution testing. Note the other end of the scale, the Minolta 7i, which is a 5mp camera which is outresolved by the 3mp Fuji s602. The Minolta has a very low efficiency(unusually low for a prosumer class camera).


-Chris
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Old Apr 17, 2003, 11:07 PM   #5
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Quote:
Originally Posted by voxmagna
6Mpix refers to the pixels but Red Green and Blue take up about 1 Byte each, so 6Mpix becomes about 18Mbyte. Of course on the 602 you are refering to the TIFF uncompressed output.

Compressed JPEG file sizes will depend on the amount of compression the camera applies in each of its modes.

Don't forget that 6Mpix on a 602, is 'derived' or 'digitally interpolated' from a special shape of 3M physical pixels on the ccd sensor.

Shooting TIFF on a 602 (6Mpix HIGH) is not for regular shots. You will find the camera slows down writing such big files to the card, and you risk freezes and long waits. Stick with the 6Mpix FINE, that's about 2Mb compressed JPEG.
___________________

I posted my question elsewhere under a different thread but I'll pose it here:

I use a 4900Z and according to my Manual, when I set the resolution to 1280x960, Quality mode Normal setting, the file size is 320kb. My arithmetic tells me that 1280x960 is 1.228Mb, not including the RGB factor of 3x. There is obviously a JPEG compression factor here. My viewed images on screen range from 260-280kb. What is the correct comprerssion factor here?
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