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Comparison between interlaced and progressive cameras
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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