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Prepared By:

Trivedi Vihang Harishchandra

ROLL No: 28ME(MSA)

Electrical Engg. Department

Guided By:Prof. Satish K. Shah

Head Of the Dept.Electrical Engg. Dept.FTE,Vadodara

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Work Done

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Input image(Unregistered

)

Divide Imageinto non

overlappedblocks

Cross-correlatedimages of those

blocks withreference image

Referenceimage

Energies ofall images

Sorting of allvalues ofenergies

Select lowerenergyblocks

Findmaximumcorrelated

pixelcoordinate

Final matchpoints.

Works too well with lowerdistortion.

But when distortion ismuch higher or image has

too much edges, lines andpoints , Match point aretoo bad.

NEED TO UNDERSTANDTHE FEATURES, SO THISREQUIRES CORRECT F/B

at CRITICAL STAGES.

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Input image(Unregistered

)

Divide Imageinto non

overlappedblocks

Cross-correlatedimages of those

blocks withreference image

Referenceimage

Energies ofall images

Sorting ofall values of

energies

Select lower energyblocks(N)

5

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DECISION CORE

From sorted value. Take the maximum single crosscorrelation value, assign its 20% less as cutoff

Watch on block numbers and cutoff.Give Template size as 32X32 for first iteration

16X16 for second iteration for same number of blocks.

Take i/p from those control points cross correlationvalue. If maximum value doesnt match cut-off thenselect next blocks. Blocks number should be less then

80% of total blocks .

If it matches the criteria make pair of 4 coordinates.Which are called control point pairs.

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50 100 150 200 250 300 350 400 450 500

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0.83

32

16

0.84

32

16

0

10

20

30

40

Cut-off TEMPLATESIZE

BLOCK SIZE

TRUEMATCH

FALSEMATCH

10

23

21

13

0

10

2030

40

50

60

70

80

BLOCK NUMBER

NOT SHOULD BEUSED

FALSE Match

TRUE Match

NOT MATCHED

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50 100 150 200 250 300 350 400 450 500

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0.806

32

16

0.88

16 16

0

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20

30

40

Cut-off TEMPLATE SIZE BLOCK SIZE

TRUE MATCH

FALSEMATCH

29

12

12

11

0

10

2030

40

50

60

70

BLOCK NUMBER

NOT SHOULD BEUSED

FALSE Match

TRUE Match

NOT MATCHED

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Work Remaining:

To develop transformation from achieved control points. To study Hardware (6748 and OMAP138) and implement this algorithm onsuitable platform.