Discrete cosine transform and internal combustion engine: what they have in common

1. Step 1. Discrete cosine transform — is used in — JPEG. DCT of 8×8 blocks.
2. Step 2. JPEG — is used in — Digital camera. The image format.
3. Step 3. Digital camera — has part — Photographic flash. The flash lights the shot when it is dark.
4. Step 4. Photographic flash — uses — Electric arc. A discharge in a xenon lamp.
5. Step 5. Electric arc — is used in — Spark plug. A spark is an electric discharge.
6. Step 6. Spark plug — is part of — Internal combustion engine. A petrol engine ignites the mixture with a spark plug.

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