Streak Image Technique & Fourier Transform Analysis

Lesson 6 of 9 • 0 upvotes • 8:44mins

Abhinandan Kumar

After capturing a high speed video of 4000 frames, the velocity of flow in the video was calculated using a streak photo technique The vertical axis of the streak image represents distance travelled down the keyhole front – from top to bottom. The horizontal axis of the streak image represents time. So a bright dot moving down the keyhole front looks like an inclined line on the streak image – and the closer to vertical the steak is, the faster the dot was moving.