By:Vanya Vabrina Valindria

Sophia BanoEng Wei Yong

By:Vanya Vabrina Valindria

Sophia BanoEng Wei Yong

MSc VIBOTReal Time Image-Processing

Assignment#1

Interlaced ScanningInterlaced ScanningInterlace is a simple method of scanning technique that stitch two successive images read from a camera

Working: divide an image into odd and even fields expose the odd lines refresh alternate to expose the even lines stitches the even and odd fields to form a single full frame

Two operation-mode techniques implemented on cameras:•Frame integration: only the even or odd field is repeatedly read from the image sensor•Field integration: pairs of consecutive frame lines are read from the image sensor simultaneously.

1st: Odd field + 2nd: Even field = Full-size frame

Progressive Scanning Cameras(Sequential or P-scan camera)

Progressive Scanning Cameras(Sequential or P-scan camera)

Working– Scans lines one at a time from left to right then

from one row to the next (top to bottom) in chronological order, creating entire frame in one pass.

Properties– All information is collected in one complete

frame.– Screen refresh rate is 60th of a second.– Smoother, more detailed and clear image is

obtained with any blurring.– Incorporate direct digital output.

Modes– Different modes are 480p,720p, 1080p.– 1080p is expensive but allow for higher

resolution.

ComparisonsComparisons

Interlaced Camera Progressive CameraApplication: Analog camera Application: Digital camerasScanning: Alternate order Scanning: Sequential orderRequire time to produce a frame

Transferring a frame at once

Refresh time: 1/30 s 1/60 sOutput: Standard televisions Computer-based systems Blurry moving object Better moving object imagesNeed only half of the bandwidth

No flicker

Must be de-interlaced before it is scaled

Higher vertical resolution

Image ResultsImage Results

Image results and details from: ProgressiveScan

Interlace Scans