Category Archives: annotation

Interesting annotation app.

One of the next steps within my Ph.D. is to create an annotation tool that can annotate a series of images. This will require capabilities like propagating annotations through time, propagating changes through time and facilitating pan/zoom actions. I recently … Continue reading

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The Flower counting algorithm lives

I recently finished a flower counting algorithm and am very happy with the results. While the test was done with an easy set of images (yellow flowers over brown ground), I wanted to celebrate an important milestone in the project with … Continue reading

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Using Matlab was a mistake.

Because it is not free. I think its awesome. Image processing, handling really large matrices, creating GUIs… It’s a very well-rounded tool and the learning curve is almost non-existent (you start doing really crazy stuff with no effort). There is … Continue reading

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Homography aided plot based Phenological measurements

Just came back from a wonderful couple of weeks in Zackenberg where I deployed two experimental plots that used multiple chessboard markers. At each plot corner a marker was placed. All four corners had different markers, and only one marker … Continue reading

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Homography Aided Plot Based Phenology Measurements

Before going home yesterday I left a process running that had the latest version of the homography algorithm.  The new trial included multiple markers and changing the way of calculating the image transformation.  When I arrived this morning, I found … Continue reading

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Making sense of my software.

Today I needed a functionality that I was sure that I had already coded.  Given that I have a bunch of active projects in different places in a semi-active status, I got a little confused and it took me some … Continue reading

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imroi: bloated Matlab commands

I was working with rbbox on my Matlab GUI application to create squares that marked important stuff inside an image.  I recently needed to move away from the rectangle based approach to a polygon based approach.  This meant not using rbbox. … Continue reading

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Better annotations -> Better PCA.

One of the issues that I identified in previous posts was that the original annotations were not of good quality.  This included annotations that were incorrect and annotations that pointed to images that did not have enough differentiating information. I … Continue reading

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Annotations: Things to improve

Took a closer look at things that need to be improved in the annotation process.  Spent the day extracting specific examples of what went wrong and how to solve/avoid it.  Here are my findings: Improve the annotations themselves The nature … Continue reading

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Expected non-exciting initial results…

I ran Principal Component Analysis (PCA) on the hog features that I calculating (Using Navneet Dalal’s code) and the result was not spectacular.  I plotted the result and color coded the types of flowers (bud:red, female:green, unknownSex:blue, hair:cyan, male:magenta).  The … Continue reading

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