On Friday, 9 January 2015 12:18:46 UTC-6, Joel Goldstick wrote:
> On Fri, Jan 9, 2015 at 12:49 PM, <semeon...@gmail.com> wrote:
>
>
> On Thursday, 8 January 2015 20:54:38 UTC-6, Denis McMahon wrote:
>
> > On Thu, 08 Jan 2015 22:07:03 +0000, Denis McMahon wrote:
>
> >
>
> > > On Thu, 08 Jan 2015 09:09:18 -0800, semeon.risom wrote:
>
> > >
>
> > >> Simple question. I hope. .....
>
> >
>
> > To follow up, below is a solution to the problem you stated.
>
> >
>
> > #!/usr/bin/python
>
> >
>
> > import Image, ImageDraw, math
>
> >
>
> > def makeimg(length, orientation):
>
> > """
>
> > Make an image file of a black 4 pixel wide line of defined length
>
> > crossing and centered on a white background of 800 px square, save
>
> > as a png file identifying line length and orientation in the file
>
> > name.
>
> > param length - pixels, length of the line
>
> > param orientation - degrees, orientation ccw of the line from +ve x
>
> > axis
>
> > Files are saved in imgs subdir, this must already exist.
>
> > File name is image_lll_ooo.jpg
>
> > lll = length, ooo = orientation, both 0 padded to 3 digits
>
> > """
>
> >
>
> > # check length is +ve and not greater than 800
>
> > if length < 0:
>
> > length = length * -1
>
> > if length > 800:
>
> > length = 800
>
> >
>
> > # check orientation is positive in range 0 .. 179
>
> > while orientation < 0:
>
> > orientation = orientation + 360
>
> > if orientation > 179:
>
> > orientation = orientation % 180
>
> >
>
> > # calculate radius in pixels and orientation in radians
>
> > radius = length / 2
>
> > orient = math.radians(orientation)
>
> >
>
> > # calculate xy coords in image space of line end points
>
> > x1 = int(400 + (radius * math.cos(orient)))
>
> > y1 = int(400 - (radius * math.sin(orient)))
>
> > x2 = int(400 + (-radius * math.cos(orient)))
>
> > y2 = int(400 - (-radius * math.sin(orient)))
>
> >
>
> > # create an image
>
> > img = Image.new('RGB', (800,800), 'rgb(255, 255, 255)')
>
> > # create a draw interface
>
> > draw = ImageDraw.Draw(img)
>
> >
>
> > # draw the line on the image
>
> > draw.line([(x1, y1), (x2, y2)], fill='rgb(0, 0, 0)', width=4)
>
> >
>
> > # determine file name, save image file
>
> > fn = 'imgs/image_{:03d}_{:03d}.jpg'.format(length,orientation)
>
> > img.save(fn)
>
> >
>
> > # stepping through ranges of values
>
> > for length in range(100, 601, 100):
>
> > for orientation in range(0, 171, 10):
>
> > makeimg(length, orientation)
>
> >
>
> > # using lists of values
>
> > for length in [50, 150, 250, 350, 450, 550, 650]:
>
> > for orientation in [0, 15, 40, 45, 60, 75, 90, 105, 120, 135, 150,
>
> > 165]:
>
> > makeimg(length, orientation)
>
> >
>
> >
>
> >
>
> >
>
> > --
>
> > Denis McMahon, denismf...@gmail.com
>
>
>
> Thank you for the help btw. I think I'm close to a solution, but I'm having
> issue feeding the coordinates from my csv file into the formula.
>
>
>
> This is the error I get:
>
> Traceback (most recent call last):
>
> File "C:\Users\Owner\Desktop\Stimuli Generation\Coordinates\Generate_w
> corr.py", line 68, in <module>
>
> makeimg(length, orientation)
>
> File "C:\Users\Owner\Desktop\Stimuli Generation\Coordinates\Generate_w
> corr.py", line 40, in makeimg
>
> orientation = orientation % 180
>
> TypeError: unsupported operand type(s) for %: 'list' and 'int'
>
> >>>
>
>
>
> and here's the code:
>
>
>
> from PIL import Image, ImageDraw
>
> from numpy import math
>
>
>
> # import csv
>
> import csv
>
> f = open('C:\Users\Owner\DesktopStimuli Generation\Coordinates\file.csv',
> 'rb')
>
> rdr = csv.reader(f)
>
> f.seek(0)
>
> i = 0
>
> a = []
>
> b = []
>
> for row in rdr:
>
> a.append(row[0])
>
> b.append(row[1])
>
>
>
>
>
> def makeimg(length, orientation):
>
> """
>
> Make an image file of a black 4 pixel wide line of defined length
>
> crossing and centered on a white background of 800 px square, save
>
> as a png file identifying line length and orientation in the file
>
> name.
>
> param length - pixels, length of the line
>
> param orientation - degrees, orientation ccw of the line from +ve x
>
> axis
>
> Files are saved in imgs subdir, this must already exist.
>
> File name is image_lll_ooo.jpg
>
> lll = length, ooo = orientation, both 0 padded to 3 digits
>
> """
>
>
>
> # check length is +ve and not greater than 800
>
> if length < 0:
>
> length = length * -1
>
> if length > 800:
>
> length = 800
>
>
>
> # check orientation is positive in range 0 .. 179
>
> while orientation < 0:
>
> orientation = orientation + 360
>
> if orientation > 179:
>
> orientation = orientation % 180
>
>
>
> # calculate radius in pixels and orientation in radians
>
> radius = length / 2
>
> orient = math.radians(orientation)
>
>
>
> # calculate xy coords in image space of line end points
>
> x1 = int(400 + (radius * math.cos(orient)))
>
> y1 = int(400 - (radius * math.sin(orient)))
>
> x2 = int(400 + (-radius * math.cos(orient)))
>
> y2 = int(400 - (-radius * math.sin(orient)))
>
>
>
> # create an image
>
> img = Image.new('RGB', (800,800), 'rgb(255, 255, 255)')
>
> # create a draw interface
>
> draw = ImageDraw.Draw(img)
>
>
>
> # draw the line on the image
>
> draw.line([(x1, y1), (x2, y2)], fill='rgb(0, 0, 0)', width=4)
>
>
>
> # determine file name, save image file
>
> fn = 'imgs/image_{:03d}_{:03d}.jpg'.format(length,orientation)
>
> img.save(fn)
>
>
>
>
>
> # using lists of values
>
> for length in [a]:
>
> for orientation in [b]:
>
> makeimg(length, orientation)
>
>
>
> above should be:
> for length in a:
> for orientation in b:
>
>
>
>
> --
>
> https://mail.python.org/mailman/listinfo/python-list
>
>
>
>
>
> --
>
>
>
> Joel Goldstick
> http://joelgoldstick.com
Unfortunately getting a new error.
Traceback (most recent call last):
File "C:\Users\Owner\Desktop\Stimuli Generation\Coordinates\Generate_w
corr.py", line 68, in <module>
makeimg(length, orientation)
File "C:\Users\Owner\Desktop\Stimuli Generation\Coordinates\Generate_w
corr.py", line 40, in makeimg
orientation = orientation % 180
TypeError: not all arguments converted during string formatting
>>>
--
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