Welcome, guest | Sign In | My Account | Store | Cart

This recipe was originally posted by sjvr767 on http://www.mobileread.com/forums/showthread.php?t=25565 and I decided to also make it available here.

It uses pypdf (http://pybrary.net/pyPdf/)

The script is supposed to be run like this:

pdf_crop.py" -m "120 50 120 180" -i mypdf.pdf

where the margins are left top right bottom

To install pyPdf try easy_install pypdf.

Python, 176 lines
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
#! /usr/bin/python


# Originally found on http://www.mobileread.com/forums/showthread.php?t=25565

import getopt, sys
from pyPdf import PdfFileWriter, PdfFileReader

def usage ():
    print """sjvr767\'s PDF Cropping Script.
Example:
my_pdf_crop.py -s -p 0.5 -i input.pdf -o output.pdf
my_pdf_crop.py --skip --percent 0.5 -input input.pdf -output output.pdf
\n
REQUIRED OPTIONS:
-p\t--percent
The factor by which to crop. Must be positive and less than or equal to 1.

-i\t--input
The path to the file to be cropped.
\n
OPTIONAL:
-s\t--skip
Skip the first page. Ouptut file will not contain the first page of the input file.

-o\t--output
Specify the name and path of the output file. If none specified, the script appends \'cropped\' to the file name.

-m\t--margin
Specify additional absolute cropping, for fine tuning results.
\t-m "left top right bottom"
"""
    sys.exit(0)

def cut_length(dictionary, key, factor):
	cut_factor = 1-factor
	cut = float(dictionary[key])*cut_factor
	cut = cut / 4
	return cut
		
def new_coords(dictionary, key, cut, margin, code = "tl"):
	if code == "tl":
		if key == "x":
			return abs(float(dictionary[key])+(cut+margin["l"]))
		else:
			return abs(float(dictionary[key])-(cut+margin["t"]))
	elif code == "tr":
		if key == "x":
			return abs(float(dictionary[key])-(cut+margin["r"]))
		else:
			return abs(float(dictionary[key])-(cut+margin["t"]))
	elif code == "bl":
		if key == "x":
			return abs(float(dictionary[key])+(cut+margin["l"]))
		else:
			return abs(float(dictionary[key])+(cut+margin["b"]))
	else:
		if key == "x":
			return abs(float(dictionary[key])-(cut+margin["r"]))
		else:
			return abs(float(dictionary[key])+(cut+margin["b"]))

try:
	opts, args = getopt.getopt(sys.argv[1:], "sp:i:o:m:", ["skip", "percent=", "input=", "output=", "margin="])
except getopt.GetoptError, err:
        # print help information and exit:
        print str(err) # will print something like "option -a not recognized"
        usage()
        sys.exit(2)

skipone = 0

for a in opts[:]:
	if a[0] == '-s' or a[0]=='--skip':
		skipone = 1

factor = 0.8 #default scaling factor

for a in opts[:]:
	if a[0] == '-p' or a[0]=='--factor':
		if a[1] != None:
			try:
				factor = float(a[1])
			except TypeError:
				print "Factor must be a number."
				sys.exit(2) #exit if no appropriate input file

input_file = None #no defualt input file
		
for a in opts[:]:
	if a[0] == '-i' or a[0]=='--input':
		if a[1] != None:
			try:
				if a[1][-4:]=='.pdf':
					input_file = a[1]
				else:
					print "Input file must be a PDF."
					sys.exit(2) #exit if no appropriate input file
			except TypeError:
				print "Input file must be a PDF."
				sys.exit(2) #exit if no appropriate input file
			except IndexError:
				print "Input file must be a PDF."
				sys.exit(2) #exit if no appropriate input file
		else:
			print "Please speicfy an input file."
			sys.exit(2) #exit if no appropriate input file

output_file = "%s_cropped.pdf" %input_file[:-4] #default output

for a in opts[:]:
	if a[0] == '-o' or a[0]=='--output': 
		if a[1]!= None:
			try:
				if a[1][-4:]=='.pdf':
					output_file = a[1]
				else:
					print "Output file must be a PDF."
			except TypeError:
				print "Output file must be a PDF."
			except IndexError:
				print "Output file must be a PDF."

margin = {"l": 0, "t": 0, "r": 0, "b": 0}

for a in opts[:]:
	if a[0] == '-m' or a[0]=='--margin':
		if a[1]!= None:
			m_temp = a[1].strip("\"").split()
			margin["l"] = float(m_temp[0])
			margin["t"] = float(m_temp[1])
			margin["r"] = float(m_temp[2])
			margin["b"] = float(m_temp[3])
		else:
			print "Error"

input1 = PdfFileReader(file(input_file, "rb"))

output = PdfFileWriter()
outputstream = file(output_file, "wb")

pages = input1.getNumPages()

top_right = {'x': input1.getPage(1).mediaBox.getUpperRight_x(), 'y': input1.getPage(1).mediaBox.getUpperRight_y()}
top_left = {'x': input1.getPage(1).mediaBox.getUpperLeft_x(), 'y': input1.getPage(1).mediaBox.getUpperLeft_y()}
bottom_right = {'x': input1.getPage(1).mediaBox.getLowerRight_x(), 'y': input1.getPage(1).mediaBox.getLowerRight_y()}
bottom_left = {'x': input1.getPage(1).mediaBox.getLowerLeft_x(), 'y': input1.getPage(1).mediaBox.getLowerLeft_y()}

print('Page dim.\t%f by %f' %(top_right['x'], top_right['y']))

cut = cut_length(top_right, 'x', factor)

new_tr = (new_coords(top_right, 'x', cut, margin, code = "tr"), new_coords(top_right, 'y', cut, margin, code = "tr"))
new_br = (new_coords(bottom_right, 'x', cut, margin, code = "br"), new_coords(bottom_right, 'y', cut, margin, code = "br" ))
new_tl = (new_coords(top_left, 'x', cut, margin, code = "tl"), new_coords(top_left, 'y', cut, margin, code = "tl"))
new_bl = (new_coords(bottom_left, 'x', cut, margin, code = "bl"), new_coords(bottom_left, 'y', cut, margin, code = "bl"))

if skipone == 0:
	for i in range(0, pages):
		page = input1.getPage(i)
		page.mediaBox.upperLeft = new_tl
		page.mediaBox.upperRight = new_tr
		page.mediaBox.lowerLeft = new_bl
		page.mediaBox.lowerRight = new_br
		output.addPage(page)
else:
	for i in range(1, pages):
		page = input1.getPage(i)
		page.mediaBox.upperLeft = new_tl
		page.mediaBox.upperRight = new_tr
		page.mediaBox.lowerLeft = new_bl
		page.mediaBox.lowerRight = new_br
		output.addPage(page)

output.write(outputstream)
outputstream.close()

1 comment

Rakesh Ram 9 years, 7 months ago  # | flag

I am not able to figure the -m {-m "120 50 120 180"} option are they in points, inches, mm or cm.