RSS News FeedRe color image processing
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Re: color image processing
Date:Wed, 5 Nov 2008 14:29:58 +0100
ravi nooka wrote: > Dear all, > > first of all, thank you for your reply's for my first message. > I have 48 bit(3channels x 16bit) color (NCC) images from a > satellite. > My requirement is to convert it to 24 bit color image. then > contrast stretch it to make it appear visually better. > What is the best algorithm for converting 48bit to 24 > bit ?. whether i have to process each channel separately or at a > time. It rather depends on the data distribution and gamut of the 48 bits data. You might, for example, be interested in the discussions on "tone mapping" between people doing HDR photography. BugBear
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Re: color image processing
Date:Wed, 5 Nov 2008 18:13:52 +0100
ravi nooka wrote: > Dear all, > > first of all, thank you for your reply's for my first message. > I have 48 bit(3channels x 16bit) color (NCC) images from a > satellite. > My requirement is to convert it to 24 bit color image. then > contrast stretch it to make it appear visually better. > What is the best algorithm for converting 48bit to 24 > bit ?. whether i have to process each channel separately or at a > time. If each channel is 16 bits then it can contain up to 65,536 values. If you are lucky then they will actually contain 256 or less values, in which case conversion to 8-bit can be achieved without loss. If you are unlucky, and there must be loss, you will need to think about what it is best to throw away *for*your*particular* *application*. -- Regards, Martin Leese E-mail: please@see.Web.for.e-mail.INVALID Web: http://members.tripod.com/martin_leese/