atw: Re: black and white

Sorry to be boring or obtuse.  No I am not getting muddled.
I am trying to get a clinically acceptable method for detecting the 
effectiveness of lint removal in washing machines.
If I can scan in the fabric and test the percentage of white on black,then I 
will have a test.


>From: "Michael Granat" <mgranat@xxxxxxxxxxxxxx>
>Reply-To: austechwriter@xxxxxxxxxxxxx
>To: <austechwriter@xxxxxxxxxxxxx>
>Subject: atw: Re: black and white
>Date: Mon, 26 Jul 2004 10:40:27 +1000
>
>Well Daryl (C), one can only ever measure the amount of white, as
>black is an absence of colour and white contains the entire RGB
>spectrum.
>
>Otherwise, we'd have white screens on B&W TVs and the stations
>would only transmit the black bits.
>
>Hey, on the other hand, if we used black paper with white toner,
>printing would become so prohibitively expensive that we could actually
>achieve the "paperless office".
>
>That aside, I did a test greyscale conversion on an image a moment ago in=
>
>HiJaak Pro, which can tell me the properties (aka Image Attributes)
>in terms of the bytes size of file, nature of format, pixels area and
>the like but, like most other graphics packages that I have seen, will
>not tell you the percentage.
>
>Hey, Erisa (Linsky) you're not just getting confused with the dot
>screen percentages that a printer (the person, not the device)
>requires for greyscale printing, are you?
>
>Cheers,
>
>Michael
>
>Michael E. Granat
>T/as Write Ideas
>Technical Communicator
>Without Prejudice. E&OE.
>
>"I have made this letter longer than usual, only because I have not had
>the time to make it shorter." - Blaise Pascal
>
>
>
>-----Original Message-----
>From: Colquhoun, Daryl [mailto:daryl.colquhoun@xxxxxx]
>Sent: 26 July 2004 10:00
>To: austechwriter@xxxxxxxxxxxxx
>Subject: atw: Re: black and white
>
><snip>
>Or did you mean the percentage of black and white overall in the image?
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