png
png(portable network graphics) is the raster, composed of binary data.'89 50 4e 47 0d 0a 1a 0a'(hex) > IHDRchunk > other chunks > IENDchunk
chunk
- name
- IHDR
- PLTE
- IDAT
- IEND
- length
00 00 00 0d
- 4bytes
- 4bytes
00 00 00 00
- type
49 48 44 52
50 4c 54 45
49 44 41 54
49 45 4e 44
- data
- 13bytes
- ?
- ?
- 0byte
- crc
- 4bytes
- 4bytes
- 4bytes
ae 42 60 82
- color_type = 03
IHDR
data
- width(4)
- height(4)
- bit_depth(1)
- color_type(1)
- compression_method(1)
- filter_method(1)
- interlace_method(1)
- grayscale
- 01,02,04,08,10
- 00
- rgb
- 08,10
- 02
- PLTE
- 01,02,04,08
- 03
- grayscale
(alpha) - 08,10
- 04
- rgb
(alpha) - 08,10
- 06
PLTE
data
- palette(1)
- ...