Hallo, haben Bilder im Code Fehlertoleranzen oder gehen sie gleich nocht mehr sobald eine 1 und 0 vertauscht ist?

Also Bilder im PC sind ja auch 1 und 0. Geht ein Bild nicht mehr auf, sobald da 1 Fehler drin ist? Oder hat das eine Fehlertoleranz? Wenn ja wie viel?

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Erzesel
1 year ago

No general statement can be made.

The error tolerance of digital images depends on the file premat , compression method and associated with the position of the error in the compressed data stream.

And from the decoder.

If you have an error with Huffman /LZW compressed data, it is generally all after the error in “Chaos”

A GIF could be completely in the bucket.

PNG saves a CRC checksum for each data block, so that a conditional error correction may be possible depending on the decoder. (normally, the tests only provide information about corrupted data) .

In JPEG, the data corruption generally only concerns the respective data block and individual patterns.

In BMP/RAW, errors affect only one pixel.

In summary, the higher the compression of an image the greater the damage caused by a single error.

Midgarden
1 year ago

Problems exist only when errors in the image (header) are in the accompanying data – errors in the image itself become visible as pixel errors at best

Erzesel
1 year ago
Reply to  Midgarden

….depends on the file format!

If you have an error with Huffman/LZW compressed data, then everything is broken.