Script to generate PNG image from given column (or 2D data in overall ASCIItable) with custom colormap and pixel sizes.
Supersedes “imageFromData” from “Code” repository.
This commit is contained in:
Philip Eisenlohr
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#!/usr/bin/env python
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# -*- coding: UTF-8 no BOM -*-
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import os,sys,string
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import numpy as np
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from optparse import OptionParser
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from PIL import Image, ImageDraw
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import damask
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scriptID = string.replace('$Id: permuteData.py 3828 2014-12-18 19:26:52Z MPIE\m.diehl $','\n','\\n')
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scriptName = os.path.splitext(scriptID.split()[1])[0]
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# --------------------------------------------------------------------
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# MAIN
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# --------------------------------------------------------------------
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parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [file[s]]', description = """
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Generate PNG image from data in given column (or 2D data of overall table).
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""", version = scriptID)
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parser.add_option('-l','--label', dest='label', type='string',
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help='column containing data [all])')
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parser.add_option('-r','--range', dest='range', type='float', nargs=2,
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help='data range (min max) [auto]')
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parser.add_option('-d','--dimension', dest='dimension', type='int', nargs=2,
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help='data dimension (width height) [native]')
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parser.add_option('--abs', dest='abs', action='store_true',
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help='magnitude of values')
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parser.add_option('--log', dest='log', action='store_true',
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help='log10 of values')
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parser.add_option('--fliplr', dest='flipLR', action='store_true',
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help='flip around vertical axis')
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parser.add_option('--flipud', dest='flipUD', action='store_true',
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help='flip around horizontal axis')
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parser.add_option('--color', dest='color', type='string',
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help='color scheme')
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parser.add_option('--invertColor',dest='invert', action='store_true',
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help='invert color scheme')
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parser.add_option('--crop', dest='crop', type='int', nargs=4, metavar='LEFT RIGHT TOP BOTTOM',
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help='pixels cropped on left, right, top, bottom')
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parser.add_option('--show', dest='show', action='store_true',
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help='show resulting image')
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parser.add_option('-N','--pixelsize', dest='pixelsize', type='int',
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help='pixel per data point')
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parser.add_option('-x','--pixelsizex', dest='pixelsizex', type='int',
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help='pixel per data point along x')
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parser.add_option('-y','--pixelsizey', dest='pixelsizey', type='int',
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help='pixel per data point along y')
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parser.set_defaults(label = None,
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range = [0.0,0.0],
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dimension = [],
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abs = False,
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log = False,
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flipLR = False,
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flipUD = False,
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color = "gray",
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invert = False,
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crop = [0,0,0,0],
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pixelsize = 1,
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pixelsizex = 1,
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pixelsizey = 1,
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show = False,
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)
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(options,filenames) = parser.parse_args()
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if options.pixelsize > 1: (options.pixelsizex,options.pixelsizey) = [options.pixelsize]*2
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# --- color palette ---------------------------------------------------------------------------------
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theMap = damask.Colormap(predefined=options.color)
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if options.invert: theMap = theMap.invert()
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theColors = np.uint8(np.array(theMap.export(format='list',steps=256))*255)
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# --- loop over input files -------------------------------------------------------------------------
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if filenames == []:
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filenames = ['STDIN']
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for name in filenames:
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if name == 'STDIN':
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file = {'name':'STDIN', 'input':sys.stdin, 'output':sys.stdout, 'croak':sys.stderr}
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file['croak'].write('\033[1m'+scriptName+'\033[0m\n')
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else:
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if not os.path.exists(name): continue
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file = {'name':name,
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'input':open(name),
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'output':open(os.path.splitext(name)[0]+\
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('_%s'%(options.label) if options.label != None else '')+\
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'.png','w'),
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'croak':sys.stderr}
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file['croak'].write('\033[1m'+scriptName+'\033[0m: '+file['name']+'\n')
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table = damask.ASCIItable(file['input'],file['output'],buffered=False) # make unbuffered ASCII_table
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table.head_read() # read ASCII header info
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# --------------- figure out column to process -----------------------------------------------------
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column = None
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if options.label != None:
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if options.label in table.labels:
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column = table.labels.index(options.label) # remember columns of requested data
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else:
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file['croak'].write('column %s not found...\n'%options.label)
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continue
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# ------------------------------------------ process data ------------------------------------------
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table.data_readArray([column] if column != None else [])
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# convert data to values between 0 and 1 and arrange according to given options
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if options.dimension != []: table.data = table.data.reshape(options.dimension[1],options.dimension[0])
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if options.abs: table.data = np.abs(table.data)
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if options.log: table.data = np.log10(table.data)
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if options.flipLR: table.data = np.fliplr(table.data)
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if options.flipUD: table.data = np.flipud(table.data)
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if np.all(np.array(options.range) == 0.0): options.range = [table.data.min(),table.data.max()]
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table.data = (table.data - min(options.range)) / \
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(max(options.range) - min(options.range))
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table.data = np.clip(table.data,0.0,1.0).\
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repeat(options.pixelsizex,axis=1).\
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repeat(options.pixelsizey,axis=0)
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(height,width) = table.data.shape
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im = Image.fromarray(theColors[np.array(255*table.data,dtype='i')], 'RGB').\
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crop(( options.crop[0],
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options.crop[2],
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width -options.crop[1],
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height-options.crop[3]))
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# ------------------------------------------ output result -----------------------------------------
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im.save(file['output'],format = "PNG")
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if options.show: im.show()
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table.input_close() # close input ASCII table
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table.output_close() # close output
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