CODEWITHSUNDEEP
imagemagickimagemagick-convert
jparanich
jparanich

Reputation: 9024

Convert 15-bit color space PNG image to text file

I'm unsure if imagemagick is able to do this, or if I need to write something myself; but I'd like to convert an image such as the below to a text file such that each line represents a single pixel (reading left to right, top to bottom) and has 15-bits of data on each line (5 bits for R, G, and B).

So for example the below image would have 256x224 = 57,344 lines of 15-bits.

Is imagemagick capable of doing this? If not is there another resource? Appreciate any help.

enter image description here

Upvotes: 1

Views: 458

Answers (2)

Mark Setchell
Mark Setchell

Reputation: 208043

This should do what you want:

convert U4zI6.png -depth 8 rgb: | perl -e '
      # Read file, 3 RGB bytes at a time
      {
         local $/ = \3;
         while(my $pixel=<STDIN>){
            my ($r,$g,$b) = unpack("CCC",$pixel);
            printf("In R/G/B: %d/%d/%d\n",$r,$g,$b);
            my $r = ($r >> 3) & 63;
            my $g = ($g >> 3) & 63;
            my $b = ($b >> 3) & 63;
            printf("Out R/G/B: %d/%d/%d\n",$r,$g,$b);
         }
      }
   '

Upvotes: 1

Glenn Randers-Pehrson
Glenn Randers-Pehrson

Reputation: 12465

Just use the ".txt" output format:

magick U4zI6.png U4zI6.txt

This will have more voluminous information for each line, but you can use a text editor such as "sed" to extract the RGB values.

$ head -6 U4Zi6.txt
# ImageMagick pixel enumeration: 256,224,65535,srgb
0,0: (28784,45232,53456)  #70B0D0  srgb(112,176,208)
1,0: (28784,45232,53456)  #70B0D0  srgb(112,176,208)
2,0: (28784,45232,53456)  #70B0D0  srgb(112,176,208)
3,0: (28784,45232,53456)  #70B0D0  srgb(112,176,208)
4,0: (28784,45232,53456)  #70B0D0  srgb(112,176,208)

Upvotes: 4

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