Blob analysis with OpenCV in Python
Posted 10th December 2021
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Here’s my methodology for performing a blob analysis from binary images in OpenCV using Python code.
Fit an inscribing circle to a shape in OpenCV
Posted 30th October 2021
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The largest possible circle that can be drawn interior to a plane figure is called an inscribing circle. This can easily be fitted to a binary shape in OpenCV.
Skip cells when running Jupyter Notebook scripts
Posted 27th September 2021
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There is a surprisingly simple way to turn off specific cells in Jupyter Notebook without having to manually comment-out chunks of code.
Bounding rectangles in Python OpenCV
Posted 20th July 2021
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There are two methods in OpenCV to derive a bounding rectangle and extract the relevant values of an object or series of objects in an image.
Managing RAW photos with Python
Posted 23rd April 2021
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Use Python to recursively scan directories and remove unused and redundant CR2 files.
Convert RGB to CMYK in Python
Posted 26th March 2021
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Efficient Python code for taking a RGB image and converting it to CMYK before splitting the relevant channels out.
Structural Similarity Index (SSIM) in Python
Posted 19th February 2021
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Quantitatively check the quality of a compressed image using a simple Python code for calculating the Structural Similarity Index (SSIM) and Mean Square Errors (MSE) between two images.
Peak Signal-to-Noise Ratio (PSNR) in Python
Posted 12th February 2021
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Quantitatively check the quality of a compressed image using a simple Python code for calculating the Peak Signal-to-Noise Ratio (PSNR) between two images.
Reading EXIF data in Python
Posted 2nd February 2021
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In order to review the properties of various common-format image files, I wrote a command-prompt script in Python that will display EXIF data and other properties of JPG, PNG, TIF, CR2 and NEF files.
Query a PostgreSQL database via Python
Posted 11th December 2020
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Use this simple template script created in Python to connect to your PostgreSQL database and run a query.