Difference between revisions of "FocalBlur"

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 +
{{Infobox script-repo
 +
|type      = script
 +
|filename  = focal_blur.py
 +
|author    = [[User:Jarl.Underhaug|Jarl Underhaug]]
 +
|license  = -
 +
}}
 +
 +
[[Image:StylizedFocalBlur.png|550px|right]]
 +
 +
 +
 
==Description==
 
==Description==
  
Line 7: Line 18:
 
Load the script using the [[run]] command. Execute the script using PyMOL syntax:
 
Load the script using the [[run]] command. Execute the script using PyMOL syntax:
 
<source lang="python">
 
<source lang="python">
FocalBlur aperture=2.0,samples=100,ray=1
+
FocalBlur aperture=2.0,samples=20,ray=1
 
</source>
 
</source>
 
or using python syntax:
 
or using python syntax:
 
<source lang="python">
 
<source lang="python">
FocalBlur(aperture=2.0,samples=100,ray=1)
+
FocalBlur(aperture=2.0,samples=20,ray=1)
 
</source>
 
</source>
  
Line 20: Line 31:
  
 
* When using raytracing, the image creation will take ''n'' times longer than normal, where ''n'' is the number of samples.
 
* When using raytracing, the image creation will take ''n'' times longer than normal, where ''n'' is the number of samples.
* The script uses [http://www.imagemagick.org/ ImageMagick] for creating the blured image. It has only been tested on Linux
+
* The aperture is related to the aperture on a camera, and is inversely proportional to the f-number.
* The aperture is a purely arbitrary value and not related to ''f'' stops on a camera.
 
* There is a bug preventing custom image sizes when not using raytracing.
 
  
 +
===Bugs===
 +
 +
* FocalBlur uses the Python Image Library (PIL), a necessary components of PIL is missing in the Windows version of PyMOL
 +
* There is a bug when not using ray tracing with the free version of PyMOL
  
 
===Examples===
 
===Examples===
  
{|
+
<gallery perrow=3 widths=300 heights=240>
|[[Image:FocalBlur_a1.0_r1.png|thumb|400px|left|FocalBlur aperture=1,samples=100,ray=1]]
+
Image:FocalBlur_a1.0_r1.png|FocalBlur aperture=1,samples=100,ray=1
|[[Image:FocalBlur_a2.0_r1.png|thumb|400px|left|FocalBlur aperture=2,samples=100,ray=1]]
+
Image:FocalBlur_a2.0_r1.png|FocalBlur aperture=2,samples=100,ray=1
|-
+
Image:FocalBlur_a4.0_r1.png|FocalBlur aperture=4,samples=400,ray=1
|[[Image:FocalBlur_a4.0_r1.png|thumb|400px|left|FocalBlur aperture=4,samples=400,ray=1]]
+
Image:FocalBlur_a4.0_r0.png|FocalBlur aperture=4,samples=400,ray=0
|[[Image:FocalBlur_a4.0_r0.png|thumb|400px|left|FocalBlur aperture=4,samples=400,ray=0]]
+
Image:Focal_blur _ex6.png
|}
+
Image:Focal blur_ex_ap3.png
 +
Image:Focal blur_ex_ap3_mode1.png
 +
Image:Focal blur_ex_ap3_mode2.png
 +
Image:Focal blur_ex_ap3_mode3.png
 +
</gallery>
  
 
==Script==
 
==Script==
Line 39: Line 56:
  
 
<source lang="python">
 
<source lang="python">
import random
 
 
 
from pymol import cmd
 
from pymol import cmd
from os import system
 
 
from tempfile import mkdtemp
 
from tempfile import mkdtemp
 
from shutil import rmtree
 
from shutil import rmtree
from math import sin,cos,pi
+
from math import sin,cos,pi,sqrt
 
+
from PIL import Image
 +
 
def FocalBlur(aperture=2.0,samples=10,ray=0,width=0,height=0):
 
def FocalBlur(aperture=2.0,samples=10,ray=0,width=0,height=0):
 
     '''
 
     '''
 
DESCRIPTION
 
DESCRIPTION
 
+
 
     Creates fancy figures by introducing a focal blur to the image. The object
 
     Creates fancy figures by introducing a focal blur to the image. The object
 
     at the origin will be in focus.  
 
     at the origin will be in focus.  
 
+
 
AUTHOR
 
AUTHOR
 
+
 
     Jarl Underhaug
 
     Jarl Underhaug
 
     University of Bergen
 
     University of Bergen
 
     jarl_dot_underhaug_at_gmail_dot_com
 
     jarl_dot_underhaug_at_gmail_dot_com
  
 +
    Updates by Jason Vertrees and Thomas Holder
 +
 
USAGE
 
USAGE
 
+
 
     FocalBlur aperture=float, samples=int, ray=0/1, width=int, height=int
 
     FocalBlur aperture=float, samples=int, ray=0/1, width=int, height=int
     
+
 
EXAMPELS
 
EXAMPELS
 
+
 
     FocalBlur aperture=1, samples=100
 
     FocalBlur aperture=1, samples=100
 
     FocalBlur aperture=2, samples=100, ray=1, width=600, height=400
 
     FocalBlur aperture=2, samples=100, ray=1, width=600, height=400
 
     '''
 
     '''
 +
 +
    # Formalize the parameter types
 +
    ray = (ray in ("True", "true", 1, "1"))
 
     aperture, samples = float(aperture), int(samples)
 
     aperture, samples = float(aperture), int(samples)
     ray, width, height = int(ray), int(width), int(height)
+
     width, height = int(width), int(height)
 
+
    # Because of a bug, only custom sizes when raytracing
 
    if not ray:
 
        width=0
 
        height=0
 
 
 
 
     # Create a temporary directory
 
     # Create a temporary directory
 
     tmpdir = mkdtemp()
 
     tmpdir = mkdtemp()
Line 84: Line 99:
 
     light = [float(s) for s in light.split(',')]
 
     light = [float(s) for s in light.split(',')]
 
     view = cmd.get_view()
 
     view = cmd.get_view()
 
+
 
     # Rotate the protein and the light in order to create the blur
 
     # Rotate the protein and the light in order to create the blur
 
     for frame in range(samples):
 
     for frame in range(samples):
 
         # Angles to rotate protein and light
 
         # Angles to rotate protein and light
         = (random.random()-0.5)*aperture
+
         # Populate angles as Fermat's spiral
         y = (random.random()-0.5)*aperture
+
        theta = frame * pi * 110.0/144.0
 +
        radius = 0.5 * aperture * sqrt(frame/float(samples-1))
 +
        x = cos(theta) * radius
 +
         y = sin(theta) * radius
 
         xr = x/180.0*pi
 
         xr = x/180.0*pi
 
         yr = y/180.0*pi
 
         yr = y/180.0*pi
 
+
 
         # Rotate the protein
 
         # Rotate the protein
 
         cmd.turn('x',x)
 
         cmd.turn('x',x)
 
         cmd.turn('y',y)
 
         cmd.turn('y',y)
 
+
 
         # Rotate the light
 
         # Rotate the light
 
         ly = light[1]*cos(xr)-light[2]*sin(xr)
 
         ly = light[1]*cos(xr)-light[2]*sin(xr)
Line 103: Line 121:
 
         lz = lz*cos(yr)-lx*sin(yr)
 
         lz = lz*cos(yr)-lx*sin(yr)
 
         cmd.set('light',[lx,ly,lz])
 
         cmd.set('light',[lx,ly,lz])
 +
 +
        curFile = "%s/frame-%04d.png" % (tmpdir,frame)
 +
        print "Created frame %i/%i (%0.0f%%)" % (frame+1,samples,100*(frame+1)/samples)
  
         # Save the image
+
         # Save the image to temporary directory
        cmd.png(tmpdir+'/frame-%04d.png' % (frame),width=width,height=height,ray=ray)
+
if ray:
 +
                cmd.ray(width,height)
 +
                cmd.png(curFile)
 +
else:
 +
        cmd.png(curFile,quiet=1)
 +
       
 +
        # Create the average/blured image
 +
        try:
 +
            avg = Image.blend(avg,Image.open(curFile),1.0/(frame+1))
 +
        except:
 +
            avg = Image.open(curFile)
 
          
 
          
 
         # Return the protein and the light to the original orientation
 
         # Return the protein and the light to the original orientation
 
         cmd.set('light',light)
 
         cmd.set('light',light)
 
         cmd.set_view(view)
 
         cmd.set_view(view)
 
+
     # Create a blured image of all the frames
+
     # Load the blured image
     system('convert %s/frame-*.png +matte -average %s/blur.png' % (tmpdir,tmpdir))
+
     avg.save('%s/avg.png' % (tmpdir))
 
+
     cmd.load('%s/avg.png' % (tmpdir))
    # Load the blured image
+
     cmd.load('%s/blur.png' % (tmpdir))
 
 
 
 
     # Delete the temporary files
 
     # Delete the temporary files
 
     rmtree(tmpdir)
 
     rmtree(tmpdir)

Latest revision as of 03:52, 17 July 2014

Type Python Script
Download focal_blur.py
Author(s) Jarl Underhaug
License -
This code has been put under version control in the project Pymol-script-repo
StylizedFocalBlur.png


Description

This script creates fancy figures by introducing a focal blur to the image. The object at the origin will be in focus.

Usage

Load the script using the run command. Execute the script using PyMOL syntax:

FocalBlur aperture=2.0,samples=20,ray=1

or using python syntax:

FocalBlur(aperture=2.0,samples=20,ray=1)


For additional options, see the script comments.

Notes

  • When using raytracing, the image creation will take n times longer than normal, where n is the number of samples.
  • The aperture is related to the aperture on a camera, and is inversely proportional to the f-number.

Bugs

  • FocalBlur uses the Python Image Library (PIL), a necessary components of PIL is missing in the Windows version of PyMOL
  • There is a bug when not using ray tracing with the free version of PyMOL

Examples

Script

Load the script using the run command

from pymol import cmd
from tempfile import mkdtemp
from shutil import rmtree
from math import sin,cos,pi,sqrt
from PIL import Image
 
def FocalBlur(aperture=2.0,samples=10,ray=0,width=0,height=0):
    '''
DESCRIPTION
 
    Creates fancy figures by introducing a focal blur to the image. The object
    at the origin will be in focus. 
 
AUTHOR
 
    Jarl Underhaug
    University of Bergen
    jarl_dot_underhaug_at_gmail_dot_com

    Updates by Jason Vertrees and Thomas Holder
 
USAGE
 
    FocalBlur aperture=float, samples=int, ray=0/1, width=int, height=int
 
EXAMPELS
 
    FocalBlur aperture=1, samples=100
    FocalBlur aperture=2, samples=100, ray=1, width=600, height=400
    '''

    # Formalize the parameter types
    ray = (ray in ("True", "true", 1, "1"))
    aperture, samples = float(aperture), int(samples)
    width, height = int(width), int(height)
 
    # Create a temporary directory
    tmpdir = mkdtemp()

    # Get the orientation of the protein and the light
    light = cmd.get('light')[1:-1]
    light = [float(s) for s in light.split(',')]
    view = cmd.get_view()
 
    # Rotate the protein and the light in order to create the blur
    for frame in range(samples):
        # Angles to rotate protein and light
        # Populate angles as Fermat's spiral
        theta = frame * pi * 110.0/144.0
        radius = 0.5 * aperture * sqrt(frame/float(samples-1))
        x = cos(theta) * radius
        y = sin(theta) * radius
        xr = x/180.0*pi
        yr = y/180.0*pi
 
        # Rotate the protein
        cmd.turn('x',x)
        cmd.turn('y',y)
 
        # Rotate the light
        ly = light[1]*cos(xr)-light[2]*sin(xr)
        lz = light[2]*cos(xr)+light[1]*sin(xr)
        lx = light[0]*cos(yr)+lz*sin(yr)
        lz = lz*cos(yr)-lx*sin(yr)
        cmd.set('light',[lx,ly,lz])
 
        curFile = "%s/frame-%04d.png" % (tmpdir,frame)
        print "Created frame %i/%i (%0.0f%%)" % (frame+1,samples,100*(frame+1)/samples)

        # Save the image to temporary directory
	if ray:
                cmd.ray(width,height)
                cmd.png(curFile)
	else:
        	cmd.png(curFile,quiet=1)
        
        # Create the average/blured image
        try:
            avg = Image.blend(avg,Image.open(curFile),1.0/(frame+1))
        except:
            avg = Image.open(curFile)
        
        # Return the protein and the light to the original orientation
        cmd.set('light',light)
        cmd.set_view(view)
 
    # Load the blured image
    avg.save('%s/avg.png' % (tmpdir))
    cmd.load('%s/avg.png' % (tmpdir))
 
    # Delete the temporary files
    rmtree(tmpdir)

cmd.extend('FocalBlur', FocalBlur)