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Nathaniel Callens
Image Compression
Commits
5bd67af5
Commit
5bd67af5
authored
Jan 27, 2022
by
Kelly Chang
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kel changed
parent
2aa38181
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26 additions
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8 deletions
+26
-8
compress_start.py
compress_start.py
+26
-8
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compress_start.py
View file @
5bd67af5
...
...
@@ -101,18 +101,36 @@ def plot_hist(tiff_list):
image
=
Image
.
open
(
image
)
#Open the image and read it as an Image object
image
=
np
.
array
(
image
)[
1
:,:]
#Convert to an array, leaving out the first row because the first row is just housekeeping data
row
,
col
=
image
.
shape
predict
=
np
.
empty
(
row
,
col
)
# create a empty matrix to update prediction
predict
=
np
.
empty
(
[
row
,
col
]
)
# create a empty matrix to update prediction
predict
[
0
,:]
=
image
[
0
,:]
# keep the first row from the image
predict
[:,
0
]
=
image
[:,
0
]
# keep the first columen from the image
diff
=
np
.
empty
(
row
,
col
)
diff
[
0
,:]
=
np
.
zeros
(
row
)
# keep the first row from the image
diff
[:,
0
]
=
np
.
zeros
(
col
)
for
r
in
range
(
1
,
row
):
# loop through the rth row
for
c
in
range
(
1
,
col
):
# loop through the cth column
surrounding
=
anp
.
array
([
predict
[
r
-
1
,
c
-
1
],
predict
[
r
-
1
,
c
],
predict
[
r
-
1
,
c
+
1
],
predict
[
r1
,
c
-
1
]])
predict
[
-
1
,:]
=
image
[
-
1
,:]
# keep the first row from the image
predict
[:,
-
1
]
=
image
[:,
-
1
]
# keep the first columen from the image
diff
=
np
.
empty
([
row
,
col
])
diff
[
0
,:]
=
np
.
zeros
(
col
)
# keep the first row from the image
diff
[:,
0
]
=
np
.
zeros
(
row
)
diff
[
-
1
,:]
=
np
.
zeros
(
col
)
# keep the first row from the image
diff
[:,
-
1
]
=
np
.
zeros
(
row
)
for
r
in
range
(
1
,
row
-
1
):
# loop through the rth row
for
c
in
range
(
1
,
col
-
1
):
# loop through the cth column
surrounding
=
np
.
array
([
predict
[
r
-
1
,
c
-
1
],
predict
[
r
-
1
,
c
],
predict
[
r
-
1
,
c
+
1
],
predict
[
r
,
c
-
1
]])
predict
[
r
,
c
]
=
np
.
mean
(
surrounding
)
# take the mean of the previous 4 pixels
diff
[
r
,
c
]
=
(
np
.
max
(
surrounding
)
-
np
.
min
(
surrounding
))
predict
=
np
.
ravel
(
predict
)
diff
=
np
.
ravel
(
diff
)
n
=
len
(
predict
)
fig
=
plt
.
figure
()
ax1
=
fig
.
add_subplot
(
111
,
projection
=
'3d'
)
z3
=
np
.
zeros
(
n
)
dx
=
np
.
ones
(
n
)
dy
=
np
.
ones
(
n
)
dz
=
np
.
arange
(
n
)
ax1
.
bar3d
(
predict
,
diff
,
z3
,
dx
,
dy
,
dz
,
color
=
"red"
)
ax1
.
axis
(
'off'
)
plt
.
show
()
if
__name__
==
'__main__'
:
...
...
@@ -124,5 +142,5 @@ if __name__ == '__main__':
scenes
=
file_extractor
()
images
=
image_extractor
(
scenes
)
plot_hist
(
images
)
\ No newline at end of file
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