# A DOUBT ON BITMAPS

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Dear friends,I have always been fascinated on bitmaps. How is it that (1) 8 bit stands for 256 colours and 24 bit stands for 16.7 million colours. Is there some formula for the conversion? (2) In image tool, I find that 16 bit stands for 3 different sets of colours. How is that? (3) In Paint Shop Pro (I HAVE VER. 5), we can convert a file to 24 bit before painting. BUT HOW CAN I DO IT IN PHOTOSHOP ( I HAVE BOTH 6 AND 7)Thanks very much for your help.Dr. Jinesh ThomasResident in Internal MedicineGauhati Medical CollegeINDIA

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Greetings Jinesh!I have no idea about questions # 2 and 3, but I guess # 1 is a matter of simple mathematics. Two to the eighth power = 256, so I guess (I'm too lazy to work it out - grin!) that two to the 24th power is about 16.7 million. If I'm wrong, I have no doubt it will be duly pointed out to me!Be well.Jaap Verduijn.

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>>(1) 8 bit stands for 256 colours and 24 bit stands for 16.7 million colours. Is there some formula for the conversion?<>(2) In image tool, I find that 16 bit stands for 3 different sets of colours. How is that?<http://website.lineone.net/~flightsimukAvoid AGP texturing = Better Performance ;)

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Thanks, very much Jaap and Chris for your replies.That puts to rest my curiosity.I guess I am now left with question number (3).- How do I convert stuff into 24 bit in photoshop?Thanks.Jinesh.

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Hi,for #3, just load your image then: IMAGE/MODE/RGB COLORHope this helps!PS: more help here: http://www.photofoolery.com/tutorials.html

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Thanks Jean.You are a pal.Have a great day.Warm regards,Jinesh.

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