A novel algorithm for image segmentation based on adaptive thresholding of the global histogram of an image is proposed and applied to medical images from the medical database of the Second Department of Surgery of the University Hospital of Alexandroupolis, Greece. The threshold values are specified through an adaptive process that determines the optimum number of histogram regions and, at the...

Now a day’s digital images are manipulated using powerful image processing tools. It may lead to many problems like Copyright infringement, hostile tampering to the image contents. A robust hashing method is developed for detecting image forgery including removal, insertion, and replacement of objects, and abnormal color modification, and for locating the forged area. The global, local and hist...

The aim of a Content-Based Image Retrieval (CBIR) system, also known as Query by Image Content (QBIC), is to help users to retrieve relevant images based on their contents. CBIR technologies provide a method to find images in large databases by using unique descriptors from a trained image. The image descriptors include texture, color, intensity and shape of the object inside an image. Several ...

We investigated the effect that the parameters of luminance distribution in fresh food have on our visual perception of its freshness. We took pictures of the degradation over 32 h in freshness of a cabbage. We used original images, which were patches of the pictures taken at different sampling hours, and artificially generated pictures, called "matched images," created by fitting the luminance...

Monitoring changes within the land surface and open water bodies is critical for natural resource management, conservation, environmental policy. While use of satellite imagery these purposes common, fine-scale change detection can be a technical challenge. Difficulties arise from variable atmospheric conditions problem assigning pixels to individual objects. We examined degree which two machin...

Background fluorescence, also known as autofluorescence, and cross-talk are two problems in fluorescence microscopy that stem from similar phenomena. When biological specimens are imaged, the detected signal often contains contributions from fluorescence originating from sources other than the imaged fluorophore. This fluorescence could either come from the specimen itself (autofluorescence), o...

For detecting image forgery including removal, insertion, and replacement of objects, and abnormal colour modification and for locating the forged area a robust hashing method is developed. Global, local and histogram features are used in forming the hash sequence. The global features are based on Zernike moments representing luminance and chrominance characteristics of the image. The local fea...