| 1 |
greg |
1.2 |
{ RCSid $Id$ } |
| 2 |
greg |
1.1 |
{ |
| 3 |
|
|
Create a calibration image using pcomb. |
| 4 |
|
|
Run through log scales in each primary and grey from 1/100 to 1. |
| 5 |
|
|
Creates eight rows of 10 color squares each. |
| 6 |
|
|
First two rows are greyscale. |
| 7 |
|
|
Next rows run through red, green, blue, magenta, yellow and cyan. |
| 8 |
|
|
} |
| 9 |
|
|
xres : 512; { settable x resolution } |
| 10 |
|
|
yres : xres * .8; { for square patches } |
| 11 |
|
|
gap : xres/128; { gap between patches } |
| 12 |
|
|
pwidth : (xres-gap)/10 - gap; { patch width } |
| 13 |
|
|
pheight : (yres-gap)/8 - gap; { patch height } |
| 14 |
|
|
gapgrey : 1; { value for gap pixels } |
| 15 |
|
|
minv : 0.01; { minimum value } |
| 16 |
|
|
scale(x) : minv^(1-x); |
| 17 |
|
|
or(a,b) : if( a, a, b ); |
| 18 |
|
|
and(a,b) : if( a, b, a ); |
| 19 |
|
|
mod(n,d) : n - floor(n/d)*d; |
| 20 |
|
|
|
| 21 |
|
|
ingap = if(or(gap-mod(x,pwidth+gap),gap-mod(y,pheight+gap)), 1, -1); |
| 22 |
|
|
|
| 23 |
|
|
ro = if(ingap, gapgrey, redval); |
| 24 |
|
|
go = if(ingap, gapgrey, grnval); |
| 25 |
|
|
bo = if(ingap, gapgrey, bluval); |
| 26 |
|
|
|
| 27 |
|
|
{ Patches are numbered starting from 0 at the lower left, incr. right then up } |
| 28 |
|
|
|
| 29 |
|
|
n = floor(x/(pwidth+gap)) + 10*floor(y/(pheight+gap)); |
| 30 |
|
|
|
| 31 |
|
|
redval = if(19.5-n, scale(n/19), |
| 32 |
|
|
select(floor((n-10)/10), scale((n-20)/9), 0, 0, |
| 33 |
|
|
scale((n-50)/9), scale((n-60)/9), 0)); |
| 34 |
|
|
grnval = if(19.5-n, scale(n/19), |
| 35 |
|
|
select(floor((n-10)/10), 0, scale((n-30)/9), 0, |
| 36 |
|
|
0, scale((n-60)/9), scale((n-70)/9))); |
| 37 |
|
|
bluval = if(19.5-n, scale(n/19), |
| 38 |
|
|
select(floor((n-10)/10), 0, 0, scale((n-40)/9), |
| 39 |
|
|
scale((n-50)/9), 0, scale((n-70)/9))); |
