raw frame encode local vars:
	satScalP (1.0 typical)
	needBlack
	needWhite
	lightGray
	nGray (4+ typical if gray scale)
	grayUse[5]
	grayErr[5] ** sounds usefull **
	grayPal[5] ** powerfull if grayScale **
	wPair (-1 typical gray scale)
	wTiad (-1 typical gray scale)
	usedColor[16] ** powerful but complex **
	tryPalette[16] ** powerful but complex **
	colorUse[7] (typical mostly 0 grayScale)
	colrPal[7] (typical mostly 0 grayScale)
	nHues (typical 0 grayScale)
	palette[maxCo] (member var)


