34 lines
1.2 KiB
Markdown
34 lines
1.2 KiB
Markdown
# TerminalImageViewer
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Small Java\* program to display images in a (modern) terminal using RGB ANSI codes and unicode block graphic characters.
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Algorithm (for each 4x8 pixel cell mapped to a unicode block graphics character):
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1. Find the color channel (R, G or B) that has the biggest range of values for the current cell
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2. Split this range in the middle
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3. Average the colors above and below and create a corresponding bitmap for the cell
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3. Compare the bitmap to the assumed bitmaps for various unicode block graphics characters
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\*) **C++ port** available at at https://github.com/stefanhaustein/tiv
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## Usage
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```
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javac TerminalImageViewer.java
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java TerminalImageViewer [-w <width-in-characters>] <image-filename-or-url>
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```
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## Common problems
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- If you see strange horizontal lines, the characters don't fully fill the character cell. Remove additional line spacing in your terminal app
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- Wrong colors? Try -256 to use a 256 color palette instead of 24 bit colors or -grayscale for grayscale.
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## Examples
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If multiple images match the filename spec, thumbnails are shown.
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