[Gimp-user] Color Printing

[Rob Ogle]

I'm trying to get a wedding chapel to move away from Photoshop and start
using the Gimp. They are almost on board except for a printing issue. If we
print a photo from Photoshop to an Epson Stylus 2200 the photo looks great.
But when we print from the Gimp, the colors are wrong. I don't know enough
graphics terms to describe it. The picture has a greenish and/or faded
quality to it. 

We're running Gimp for Windows on a new XP Pro box w/ a P4 cpu, 1GB RAM and
a 200GB drive. 

Any suggestions?

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Re: [Gimp-user] How to find out path length?

[Sven Neumann]

Hi,

On Sun, 2006-09-24 at 16:51 +0200, Paolo Herms wrote:

 I've got a cartographic image and I designed a path on it.
 Is there any way to find out its length?
 What I want to do is to measure the length of a path in the real landscape.

You could write a script that uses the PDB function
gimp-vectors-stroke-get-length to do this. I am not sure but I believe
that this functionality is new in GIMP 2.3 and not available in GIMP 2.2


Sven


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Re: [Gimp-user] How to find out path length?

[saulgoode]

If you are using Script-fu and your script is for versions 2.2.x of the
GIMP then the following function will return the length of a given path.
 It will work with version 2.3 but will generate some deprecation
warnings (and 2.3 provides better methods).

;; 'sflib-path-get-length' returns the length of the specified path
;;
;; NOTE: If the end of the path is a X=0, Y=0 (and the slope
;;   is zero there) then the value returned will be 
;;   slightly shorter (as much as 1.4) than actual.
;;   (The path may *start* at 0,0)

(define (sflib-path-get-length image pathname)
  (let* (
  (path (gimp-path-get-points image pathname))
  (last-index (* 9 (- (trunc (/ (+ (caddr path) 3) 9)) 1)))
  (points (cadr (cddr path)))
  (point-guess)
  (point-lo (list (aref points  0) (aref points  1)))
  (point-hi (list (aref points  last-index) (aref points (+
last-index 1
  (guess (sqrt (+ (* (- (car point-hi) (car point-lo)) 
 (- (car point-hi) (car point-lo))) 
  (* (- (cadr point-hi) (cadr point-lo)) 
 (- (cadr point-hi) (cadr point-lo)
  )
  (guess-lo 0)
  (guess-hi (* guess 2))
  (Done FALSE)
  (pnt (gimp-path-get-point-at-dist image guess-hi))
  )
(while (not (and (= (car pnt) 0) (= (cadr pnt) 0) (= (caddr pnt) 0)))
  (set! guess-hi (* guess-hi 2))
  (set! pnt (gimp-path-get-point-at-dist image guess-hi))
  )
  
(while (= Done FALSE)
  (set! point-guess (gimp-path-get-point-at-dist image guess))
  (if (and (= (car point-guess) 0) (= (cadr point-guess) 0) (=
(caddr point-guess) 0))
(begin 
  (set! point-hi point-guess) 
  (set! guess-hi guess)
  (set! guess (/ (+ guess guess-lo) 2))
  )
(if (or (and (= (car  point-guess) (car  point-lo))
 (= (cadr point-guess) (cadr point-lo))
 )
(and (= (car  point-guess) (car  point-hi))
 (= (cadr point-guess) (cadr point-hi))
 ))
  (set! Done TRUE)
  (begin 
(set! point-lo point-guess)
(set! guess-lo guess)
(set! guess (/ (+ guess guess-hi) 2))
)
  )
)
  )
guess 
)
  )

-- 
Paolo Herms
Sun, 24 Sep 2006 07:52:03 -0700

 Hello,
 I've got a cartographic image and I designed a path on it.
 Is there any way to find out its length?

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