As an additional index of image complexity, the entropy of each grayscaled image was determined.
The value of the speckle temporal contrast C at pixel (x, y) was calculated as where I i is the light intensity of the ith laser speckle image, σ is the standard deviation of intensity, i is the index of image in the sequence, and N is equal to the total number of images recorded.
One is WholeWeb.net, a search-engine company that is creating a program that its founders say will be able to match scanned photographs to an index of images found on the Web.
where {ζ uv :u=1,2…,R,v=1,2,…,C} and Z uv are the eigenvalues and eigenvectors of P, and R,C are image size, and u,v the indices of image pixels and β the step parameter.
The vector at the input of the clutter reduction system, and its relationship with the original image is described in (1) for a vertical mode, being and the row and column indexes in the image, respectively, and the index of the image in the set.
Maebatake et al. used phantom studies based on the relationship between the noise equivalent count (NEC), as an index of PET image quality and TOF-PET image quality for 18F-FDG PET/CT showing similar results regarding the impact of PSF and TOF [40].
Digital images were electronically transferred to an offline workstation where as a first step an automated quality index of the image was assessed and if the predefined quality criteria were met, CIMT measurements were performed by using a dedicated analysis software (M'Ath, Metris SRL, Argenteuil, France) in order to reduce measurement variability.
where c is the color channel index of the images.
This is also pointed out in [34], and they confirmed that the SSIM index of blurred images which were perceptually degraded severely became lower.
In this paper, we illustrate several project management tasks and show how Content-Based Search Engines can facilitate automatic retrieval, and indexing of construction images in image databases.
Anisotropy indices of the image planes ranged from 0.08 to 0.45.
