Tiny surface defect inspection of electronic passive components using discrete cosine transform decomposition and cumulative sum techniques.
Hong-Dar LinPublished in: Image Vis. Comput. (2008)
Keyphrases
- discrete cosine transform
- cumulative sum
- image compression
- dct coefficients
- defect detection
- transform domain
- blocking artifacts
- compressed images
- filter bank
- anomaly detection
- dct domain
- three dimensional
- image processing
- automated visual inspection
- printed circuit boards
- spatial domain
- subband
- building blocks
- jpeg images
- discrete fourier transform
- feature vectors
- object recognition
- surface inspection
- high quality