[Blindmath] braille image tool handout

[John Miller]

Hello,

I have a handout available at the NFB Research and
Development meeting in Dallas.

I am pasting the contents of the handout below.Contact me at johnmillerphd at hotmail.com with any questions.

The handout contains output from the Braille Image Tool.

A statement of the problem is to look at a paper bull’s-eye
after an archer has shot a number of arrows into it.

We say the archery system had little distortion if the holes
made by the arrows are clustered together in the center of the bull’s-eye.

The archery system has distortion if a hole is made at the
edge of the bull’s-eye, if the holes are spread out, or if the holes are
translated away from the center of the bull’s-eye.

The examples provide some descriptive text followed by a
grayscale image.

The grayscale image begins on the line after the text
has_distortion.

In the braille image, letters early in the alphabet describe
the positions likely to have  no hole
made by an arrow.

Letters late in the alphabet correspond to positions likely
to have a hole made by an arrow.

Example 1 describes a situation where the arrows are at the
center of the bull’s-eye, clustered tightly together, and no hole was made at
the border.

In this example, has_distortion is set to 0.

Example 2 describes a situation where the holes made by the
arrows are spread out.

In this example, has_distortion is set to 1.

Example 3 describes a situation where the holes made by the
arrows have been translated to near the edge of the bull’s-eye and there are
holes on the edge of the bull’s-eye.

In this example, has_distortion is set to 1.



Braille Image
Tools Examples

John Miller

July 1, 2012

 

Example 1

Inside
print_braille_sub_image

delta = 4.923077

The min range val
is 0.000000

The max range val
is 128.000000

num_non_min_symbols
= 25

first_non_min_row
= 7

last_non_min_row
= 11

non_min_range_rows
= 5

num_left_crop =
12

num_right_crop =
13

num_right_shift =
0

num_down_shift =
0

has_border = 1

has_focus = 1

has_small_translation
= 1

has_small_distortion
= 1

 0 12aaaaaa13a

 7 12abeheb13a

 8 12aetzte13a

 9 12ahzzzh13a

10 12aetzte13a

11 12abeheb13a

12 12aaaaaa13a

 

Example 2

Inside
print_braille_sub_image

delta = 4.923077

The min range val
is 0.000000

The max range val
is 128.000000

num_non_min_symbols
= 349

first_non_min_row
= 1

last_non_min_row
= 17

non_min_range_rows
= 17

num_left_crop = 2

num_right_crop =
3

num_right_shift =
0

num_down_shift =
0

has_border = 1

has_focus = 0

has_small_translation
= 1

has_small_distortion
= 0

 0 aaaaaaaaaaaaaaaaaaaaaaaaaaa3a

 1 aaaaaaaaabbbbcccbbbbaaaaaaa3a

 2 aaaaaaabbcddeeeeeddcbbaaaaa3a

 3 aaaaabbcdefghiiihgfedcbbaaa3a

 4 aaaabcdeghjlnooonljhgedcbaa3a

 5 aaabbdegjmpsvwxwvspmjgedbba3a

 6 aaabcegjnrwzzzzzzzwrnjgecba3a

 7 aabcdfimrwzzzzzzzzzwrmifdcb3a

 8 aabcegjouzzzzzzzzzzzuojgecb3a

 9 aabcegkpvzzzzzzzzzzzvpkgecb3a

10
aabcegjouzzzzzzzzzzzuojgecb3a

11
aabcdfimrwzzzzzzzzzwrmifdcb3a

12
aaabcegjnrwzzzzzzzwrnjgecba3a

13
aaabbdegjmpsvwxwvspmjgedbba3a

14
aaaabcdeghjlnooonljhgedcbaa3a

15
aaaaabbcdefghiiihgfedcbbaaa3a

16
aaaaaaabbcddeeeeeddcbbaaaaa3a

17 aaaaaaaaabbbbcccbbbbaaaaaaa3a

18
aaaaaaaaaaaaaaaaaaaaaaaaaaa3a

 

Example 3

Inside
print_braille_sub_image

delta = 4.923077

The min range val
is 0.000000

The max range val
is 128.000000

num_non_min_symbols
= 25

first_non_min_row
= 13

last_non_min_row
= 17

non_min_range_rows
= 5

num_left_crop =
16

num_right_crop =
9

num_right_shift =
3

num_down_shift =
5

has_border = 1

has_focus = 1

has_small_translation
= 0

has_small_distortion
= 0

 0 16aaaaaa9a

13 16abeheb9a

14 16aetzte9a

15 16ahzzzh9a

16 16aetzte9a

17 16abeheb9a

18 16aaaaaa9a

 

Example 4

Inside
print_braille_sub_image

delta = 4.923077

The min range val
is 0.000000

The max range val
is 128.000000

num_non_min_symbols
= 25

first_non_min_row
= 13

last_non_min_row
= 17

non_min_range_rows
= 5

num_left_crop =
25

num_right_crop =
0

num_right_shift =
12

num_down_shift =
5

has_border = 0

has_focus = 0

has_small_translation
= 0

has_small_distortion
= 0

 0 25aaaaaa

13 25abeheb

14 25aetzte

15 25ahzzzh

16 25aetzte

17 25abeheb

18 25aaaaaa

Very best,John Miller