http://inperc.com/blog2 From a newcomer, hence the name Wed, 03 Sep 2008 17:11:18 +0000 http://backend.userland.com/rss092 en A few days ago I was contacted by a representative of a biotech company. He was interested in figuring out how Pixcavator can help them to automatically carry out a function that they currently do manually. They were looking for a method to automatically measure, document, and summarize characteristics of ... http://inperc.com/blog2/2008/09/03/measurement-statistics-of-fibers-an-image-analysis-example/ I recently got a new book to read, From Gestalt Theory to Image Analysis, A Probabilistic Approach by Desolneux, Moisan, and Morel. I’ve heard of Gestalt before – apparently it’s a psychology theory of the mind. There is also an image analysis angle as Gestalt is a German word for "form" ... http://inperc.com/blog2/2008/08/31/gestalt-and-computer-vision/ Previously we discussed the watershed algorithm for binary images. One thing that wasn’t explained was where the name comes from. We start with the following approach. According to Gonzales and Woods: “we think of a gray scale image as a topological surface, where the values of f(x,y) are interpreted as heights.” ... http://inperc.com/blog2/2008/08/24/watershed-image-segmentation-part-1/ As a suggestion from one of our users, we used Pixcavator to analyze floorplans. The task is very simple – measure the rooms. Measuring irregular (or even regular) isn’t easy for a person because unless all rooms are rectangular one needs know some geometry. If the corners aren’t 90 degrees, you ... http://inperc.com/blog2/2008/08/20/measuring-floorplan-an-image-analysis-example/ The paper is A review of imaging techniques for systems biology (BMC Systems Biology 2008, 2:74) . Pixcavator is listed in "Table 2 - Overview of microscopy image analysis software" along with a few other companies/products. All the usual suspects are here: Image-Pro from Media Cybernetics, ImageJ, CellProfiler, Clemex Vision. ... http://inperc.com/blog2/2008/08/17/reference-to-pixcavator-in-bmc-systems-biology/ The updated interface is the first thing that you notice. All buttons and sliders are arranged in groups accompanied by headers. Text and tooltips were improved throughout. The RGB channel analysis was completed to include all three channels. Just click a button in the Analysis tab for the color you want. A ... http://inperc.com/blog2/2008/08/14/pixcavator-image-analysis-31-released/ The first picture explains what normally happens when a prostate tumor has to be evaluated. The prostate is cut into thin slices and the slices are put on pieces of glass. Next, the doctor outlines the tumor within the prostate with a marker. Finally, the area of the outlined region ... http://inperc.com/blog2/2008/08/10/measuring-a-tumor-an-image-analysis-example/ Image analysis and computer vision is the extraction of meaningful information from digital images. One of the most prominent application of computer vision is in medical image processing - extraction of information for the purpose of making a medical diagnosis. It can be detection and measurement of tumors, arteriosclerosis or ... http://inperc.com/blog2/2008/08/03/our-rd-plans/ During a retina inspection one of the most common pathology is Drusen deposits. Some computer assisted methods have been created to solve this problem and especially avoid the subjectivity of the doctors ("MD3RI a Tool for Computer-Aided Drusens Contour Drawing") [1]. An image from this paper is below: Pixcavator easily produces similar ... http://inperc.com/blog2/2008/07/29/a-couple-of-examples-of-image-analysis/ The paper (PDF, 10 pages, 360K) describes the algorithm behind Pixcavator. The algorithm is presented in detail in the wiki but this is a new and improved exposition. I reconsidered some of the terminology, re-wrote the pseudocode, and improved illustrations. There is also a gap in the wiki - when ... http://inperc.com/blog2/2008/07/27/topology-based-method-of-segmentation-of-gray-scale-images-paper/