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#1 |
Junior Member
Join Date: Jul 2003
Posts: 3
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Minolta advertises and states in the manual that it has 12 bit conversions. I only get 8 bits as reported by Minolta's Dimage program and Photoshop. Minolta's tech people said send it back for repair.
How many bits do you get in TIF and Superfine modes? Don |
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#2 |
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Join Date: Jun 2003
Posts: 28
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Looking at Giff's post above it appears that TIFF saves in 16 bit (so on the 414 should be 12 bit?) whereas JPEG saves in 8 bit (which agrees with what you are seeing. So maybe its down to the file format?
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#3 | |
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Join Date: Jun 2002
Location: 39.18776, -77.311353333333
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There's nothing wrong with the camera...
Quote:
1. The CCD is 12/14-bit resolution of monochrome Red, Green, andBlue pixels (ie a 1/3 of the sensor is sensitive to each color!). Some Nikon cameras will capture in complementary color with a 4th luminance channel, but the idea is the same... 2. After the picture is taken the camera processes thoses individual monochrome pixel to a color pixel by interpolation and where the resulting round-off occurs (ie 12-bit -> 8-bit), but now you have 24-bit color at 8-bit for every pixel: (8-bit,8-bit,8-bit). The same as the sRGB monitor standard (256x256x256) ie 16.777 million colors. 3. While some cameras can output 16-bit TIFF, ie 48-bit color depth (16-bit,16-bit,16-bit), most cameras don't and this includes the s414 or the D7/D7i/D7hi for that matter. Beside Photoshop would have choked on it or will only run with limited functions. -> TIFF from most cameras is also output @ the more universal 8-bit resolution, but 24-bit color depth. The file size would have been even more humongous @ 16-bit with not much gain (ie you can't display it and Photoshop can't take it in its entirety)! ![]() ![]() ![]() The Sigma's Foveon sensor is the only exception and will capture color @ every pixels... :lol: |
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#4 |
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Join Date: Jul 2003
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Thank you for your very informative answer.
I came to that conclusion after reading some other literature and talking to the Minolta tech guys. After having them tell me to send it in for repair, I called back and told them my conclusion, they huddled and said OK. Edit: I also concluded that a 5 mp stored picture is essentially the same as a 5/3 mp picture interpolated back up to 5 m pixles. But this is much better than a 5/3 mp picture taken with a 5/3 mp camera. Where can I find results on pictues stored at different sizes to verify this theory? Don ![]() |
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