
A collection of test PNG files.  All are square, sizes 1x1 thru 9x9
and 72x72 thru 80x80.  Each (except the very smallest) is an image
of diagonal stripes arranged as



          ....................
          .         /        /
          .green   /        /.
          .       /        / .
          .      /        /  .
          .     /        /   .
          .    /        /    .
          .   / black  /     .
          .  /        /      .
          . /        /       .
          ./        /       /.
          .        / gray  / .
          .       /       /  .
          .      /       /   .
          .     /       /    .
          .    /       /     .
          .   /       / red  .
          .  /       /       .
          . /       /        .
          ./       /         .
          ....................

Nomenclature   b nn i|n c|t 2|8 [f] .png
             
                 b is just a "b"
                 nn is width and height
                 i|n is interlaced or noninterlaced
                 c|t is colormap or truecolor
                 2|8 is bitdepth
                 f   is Paeth filtered

b01it8.png ( 104 bytes ):
    PNG image, 8 bit, 1 x 1, truecolor, deflate, filter by rows,
    interlaced
b01it8f.png ( 104 bytes ):
    PNG image, 8 bit, 1 x 1, truecolor, deflate, filter by rows,
    interlaced
b01nc2.png ( 117 bytes ):
    PNG image, 1 bit, 1 x 1, colormap RGB, deflate, filter by rows,
    non-interlaced
b01nc8.png ( 117 bytes ):
    PNG image, 1 bit, 1 x 1, colormap RGB, deflate, filter by rows,
    non-interlaced
b01nt8.png ( 104 bytes ):
    PNG image, 8 bit, 1 x 1, truecolor, deflate, filter by rows,
    non-interlaced
b02it8.png ( 109 bytes ):
    PNG image, 8 bit, 2 x 2, truecolor, deflate, filter by rows,
    interlaced
b02it8f.png ( 115 bytes ):
    PNG image, 8 bit, 2 x 2, truecolor, deflate, filter by rows,
    interlaced
b02nc2.png ( 125 bytes ):
    PNG image, 2 bit, 2 x 2, colormap RGB, deflate, filter by rows,
    non-interlaced
b02nc8.png ( 125 bytes ):
    PNG image, 2 bit, 2 x 2, colormap RGB, deflate, filter by rows,
    non-interlaced
b02nt8.png ( 109 bytes ):
    PNG image, 8 bit, 2 x 2, truecolor, deflate, filter by rows,
    non-interlaced
b03it8.png ( 115 bytes ):
    PNG image, 8 bit, 3 x 3, truecolor, deflate, filter by rows,
    interlaced
b03it8f.png ( 126 bytes ):
    PNG image, 8 bit, 3 x 3, truecolor, deflate, filter by rows,
    interlaced
b03nc2.png ( 130 bytes ):
    PNG image, 2 bit, 3 x 3, colormap RGB, deflate, filter by rows,
    non-interlaced
b03nc8.png ( 130 bytes ):
    PNG image, 2 bit, 3 x 3, colormap RGB, deflate, filter by rows,
    non-interlaced
b03nt8.png ( 115 bytes ):
    PNG image, 8 bit, 3 x 3, truecolor, deflate, filter by rows,
    non-interlaced
b04it8.png ( 120 bytes ):
    PNG image, 8 bit, 4 x 4, truecolor, deflate, filter by rows,
    interlaced
b04it8f.png ( 136 bytes ):
    PNG image, 8 bit, 4 x 4, truecolor, deflate, filter by rows,
    interlaced
b04nc2.png ( 132 bytes ):
    PNG image, 2 bit, 4 x 4, colormap RGB, deflate, filter by rows,
    non-interlaced
b04nc8.png ( 132 bytes ):
    PNG image, 2 bit, 4 x 4, colormap RGB, deflate, filter by rows,
    non-interlaced
b04nt8.png ( 119 bytes ):
    PNG image, 8 bit, 4 x 4, truecolor, deflate, filter by rows,
    non-interlaced
b05it8.png ( 127 bytes ):
    PNG image, 8 bit, 5 x 5, truecolor, deflate, filter by rows,
    interlaced
b05it8f.png ( 147 bytes ):
    PNG image, 8 bit, 5 x 5, truecolor, deflate, filter by rows,
    interlaced
b05nc2.png ( 139 bytes ):
    PNG image, 2 bit, 5 x 5, colormap RGB, deflate, filter by rows,
    non-interlaced
b05nc8.png ( 139 bytes ):
    PNG image, 2 bit, 5 x 5, colormap RGB, deflate, filter by rows,
    non-interlaced
b05nt8.png ( 123 bytes ):
    PNG image, 8 bit, 5 x 5, truecolor, deflate, filter by rows,
    non-interlaced
b06it8.png ( 134 bytes ):
    PNG image, 8 bit, 6 x 6, truecolor, deflate, filter by rows,
    interlaced
b06it8f.png ( 155 bytes ):
    PNG image, 8 bit, 6 x 6, truecolor, deflate, filter by rows,
    interlaced
b06nc2.png ( 142 bytes ):
    PNG image, 2 bit, 6 x 6, colormap RGB, deflate, filter by rows,
    non-interlaced
b06nc8.png ( 142 bytes ):
    PNG image, 2 bit, 6 x 6, colormap RGB, deflate, filter by rows,
    non-interlaced
b06nt8.png ( 126 bytes ):
    PNG image, 8 bit, 6 x 6, truecolor, deflate, filter by rows,
    non-interlaced
b07it8.png ( 144 bytes ):
    PNG image, 8 bit, 7 x 7, truecolor, deflate, filter by rows,
    interlaced
b07it8f.png ( 165 bytes ):
    PNG image, 8 bit, 7 x 7, truecolor, deflate, filter by rows,
    interlaced
b07nc2.png ( 145 bytes ):
    PNG image, 2 bit, 7 x 7, colormap RGB, deflate, filter by rows,
    non-interlaced
b07nc8.png ( 145 bytes ):
    PNG image, 2 bit, 7 x 7, colormap RGB, deflate, filter by rows,
    non-interlaced
b07nt8.png ( 131 bytes ):
    PNG image, 8 bit, 7 x 7, truecolor, deflate, filter by rows,
    non-interlaced
b08it8.png ( 146 bytes ):
    PNG image, 8 bit, 8 x 8, truecolor, deflate, filter by rows,
    interlaced
b08it8f.png ( 166 bytes ):
    PNG image, 8 bit, 8 x 8, truecolor, deflate, filter by rows,
    interlaced
b08nc2.png ( 148 bytes ):
    PNG image, 2 bit, 8 x 8, colormap RGB, deflate, filter by rows,
    non-interlaced
b08nc8.png ( 148 bytes ):
    PNG image, 2 bit, 8 x 8, colormap RGB, deflate, filter by rows,
    non-interlaced
b08nt8.png ( 135 bytes ):
    PNG image, 8 bit, 8 x 8, truecolor, deflate, filter by rows,
    non-interlaced
b09it8.png ( 153 bytes ):
    PNG image, 8 bit, 9 x 9, truecolor, deflate, filter by rows,
    interlaced
b09it8f.png ( 174 bytes ):
    PNG image, 8 bit, 9 x 9, truecolor, deflate, filter by rows,
    interlaced
b09nc2.png ( 161 bytes ):
    PNG image, 2 bit, 9 x 9, colormap RGB, deflate, filter by rows,
    non-interlaced
b09nc8.png ( 161 bytes ):
    PNG image, 2 bit, 9 x 9, colormap RGB, deflate, filter by rows,
    non-interlaced
b09nt8.png ( 139 bytes ):
    PNG image, 8 bit, 9 x 9, truecolor, deflate, filter by rows,
    non-interlaced
b72it8.png ( 602 bytes ):
    PNG image, 8 bit, 72 x 72, truecolor, deflate, filter by rows,
    interlaced
b72it8f.png ( 628 bytes ):
    PNG image, 8 bit, 72 x 72, truecolor, deflate, filter by rows,
    interlaced
b72nc2.png ( 310 bytes ):
    PNG image, 2 bit, 72 x 72, colormap RGB, deflate, filter by rows,
    non-interlaced
b72nc8.png ( 310 bytes ):
    PNG image, 2 bit, 72 x 72, colormap RGB, deflate, filter by rows,
    non-interlaced
b72nt8.png ( 344 bytes ):
    PNG image, 8 bit, 72 x 72, truecolor, deflate, filter by rows,
    non-interlaced
b73it8.png ( 554 bytes ):
    PNG image, 8 bit, 73 x 73, truecolor, deflate, filter by rows,
    interlaced
b73it8f.png ( 599 bytes ):
    PNG image, 8 bit, 73 x 73, truecolor, deflate, filter by rows,
    interlaced
b73nc2.png ( 350 bytes ):
    PNG image, 2 bit, 73 x 73, colormap RGB, deflate, filter by rows,
    non-interlaced
b73nc8.png ( 350 bytes ):
    PNG image, 2 bit, 73 x 73, colormap RGB, deflate, filter by rows,
    non-interlaced
b73nt8.png ( 345 bytes ):
    PNG image, 8 bit, 73 x 73, truecolor, deflate, filter by rows,
    non-interlaced
b74it8.png ( 615 bytes ):
    PNG image, 8 bit, 74 x 74, truecolor, deflate, filter by rows,
    interlaced
b74it8f.png ( 673 bytes ):
    PNG image, 8 bit, 74 x 74, truecolor, deflate, filter by rows,
    interlaced
b74nc2.png ( 356 bytes ):
    PNG image, 2 bit, 74 x 74, colormap RGB, deflate, filter by rows,
    non-interlaced
b74nc8.png ( 356 bytes ):
    PNG image, 2 bit, 74 x 74, colormap RGB, deflate, filter by rows,
    non-interlaced
b74nt8.png ( 349 bytes ):
    PNG image, 8 bit, 74 x 74, truecolor, deflate, filter by rows,
    non-interlaced
b75it8.png ( 649 bytes ):
    PNG image, 8 bit, 75 x 75, truecolor, deflate, filter by rows,
    interlaced
b75it8f.png ( 686 bytes ):
    PNG image, 8 bit, 75 x 75, truecolor, deflate, filter by rows,
    interlaced
b75nc2.png ( 360 bytes ):
    PNG image, 2 bit, 75 x 75, colormap RGB, deflate, filter by rows,
    non-interlaced
b75nc8.png ( 360 bytes ):
    PNG image, 2 bit, 75 x 75, colormap RGB, deflate, filter by rows,
    non-interlaced
b75nt8.png ( 350 bytes ):
    PNG image, 8 bit, 75 x 75, truecolor, deflate, filter by rows,
    non-interlaced
b76it8.png ( 643 bytes ):
    PNG image, 8 bit, 76 x 76, truecolor, deflate, filter by rows,
    interlaced
b76it8f.png ( 664 bytes ):
    PNG image, 8 bit, 76 x 76, truecolor, deflate, filter by rows,
    interlaced
b76nc2.png ( 329 bytes ):
    PNG image, 2 bit, 76 x 76, colormap RGB, deflate, filter by rows,
    non-interlaced
b76nc8.png ( 329 bytes ):
    PNG image, 2 bit, 76 x 76, colormap RGB, deflate, filter by rows,
    non-interlaced
b76nt8.png ( 358 bytes ):
    PNG image, 8 bit, 76 x 76, truecolor, deflate, filter by rows,
    non-interlaced
b77it8.png ( 600 bytes ):
    PNG image, 8 bit, 77 x 77, truecolor, deflate, filter by rows,
    interlaced
b77it8f.png ( 661 bytes ):
    PNG image, 8 bit, 77 x 77, truecolor, deflate, filter by rows,
    interlaced
b77nc2.png ( 364 bytes ):
    PNG image, 2 bit, 77 x 77, colormap RGB, deflate, filter by rows,
    non-interlaced
b77nc8.png ( 364 bytes ):
    PNG image, 2 bit, 77 x 77, colormap RGB, deflate, filter by rows,
    non-interlaced
b77nt8.png ( 359 bytes ):
    PNG image, 8 bit, 77 x 77, truecolor, deflate, filter by rows,
    non-interlaced
b78it8.png ( 641 bytes ):
    PNG image, 8 bit, 78 x 78, truecolor, deflate, filter by rows,
    interlaced
b78it8f.png ( 682 bytes ):
    PNG image, 8 bit, 78 x 78, truecolor, deflate, filter by rows,
    interlaced
b78nc2.png ( 367 bytes ):
    PNG image, 2 bit, 78 x 78, colormap RGB, deflate, filter by rows,
    non-interlaced
b78nc8.png ( 367 bytes ):
    PNG image, 2 bit, 78 x 78, colormap RGB, deflate, filter by rows,
    non-interlaced
b78nt8.png ( 363 bytes ):
    PNG image, 8 bit, 78 x 78, truecolor, deflate, filter by rows,
    non-interlaced
b79it8.png ( 647 bytes ):
    PNG image, 8 bit, 79 x 79, truecolor, deflate, filter by rows,
    interlaced
b79it8f.png ( 701 bytes ):
    PNG image, 8 bit, 79 x 79, truecolor, deflate, filter by rows,
    interlaced
b79nc2.png ( 371 bytes ):
    PNG image, 2 bit, 79 x 79, colormap RGB, deflate, filter by rows,
    non-interlaced
b79nc8.png ( 371 bytes ):
    PNG image, 2 bit, 79 x 79, colormap RGB, deflate, filter by rows,
    non-interlaced
b79nt8.png ( 365 bytes ):
    PNG image, 8 bit, 79 x 79, truecolor, deflate, filter by rows,
    non-interlaced
b80it8.png ( 649 bytes ):
    PNG image, 8 bit, 80 x 80, truecolor, deflate, filter by rows,
    interlaced
b80it8f.png ( 663 bytes ):
    PNG image, 8 bit, 80 x 80, truecolor, deflate, filter by rows,
    interlaced
b80nc2.png ( 333 bytes ):
    PNG image, 2 bit, 80 x 80, colormap RGB, deflate, filter by rows,
    non-interlaced
b80nc8.png ( 333 bytes ):
    PNG image, 2 bit, 80 x 80, colormap RGB, deflate, filter by rows,
    non-interlaced
b80nt8.png ( 369 bytes ):
    PNG image, 8 bit, 80 x 80, truecolor, deflate, filter by rows,
    non-interlaced
