24 lines
621 B
Python
24 lines
621 B
Python
|
def jpeg_res(filename):
|
||
|
|
""""This function prints the resolution of the jpeg image file passed into it"""
|
||
|
|
|
||
|
|
# open image for reading in binary mode
|
||
|
|
with open(filename,'rb') as img_file:
|
||
|
|
|
||
|
|
# height of image (in 2 bytes) is at 164th position
|
||
|
|
img_file.seek(163)
|
||
|
|
|
||
|
|
# read the 2 bytes
|
||
|
|
a = img_file.read(2)
|
||
|
|
|
||
|
|
# calculate height
|
||
|
|
height = (a[0] << 8) + a[1]
|
||
|
|
|
||
|
|
# next 2 bytes is width
|
||
|
|
a = img_file.read(2)
|
||
|
|
|
||
|
|
# calculate width
|
||
|
|
width = (a[0] << 8) + a[1]
|
||
|
|
|
||
|
|
print("The resolution of the image is",width,"x",height)
|
||
|
|
|
||
|
|
jpeg_res("img1.jpg")
|