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Matha Goram edited this page Jul 26, 2018 · 8 revisions

Welcome to the picamera wiki!

picamera

PiCamera Basic and Advanced Recipes adapted from "official" documentation for training purposes. The purpose of this document to record my experience in following the documentation prepared by Dave Jones.

Basic Recipes

  1. Capturing to a file

This example is a basic use of the capture method in the PiCamera classs. The capture method has the following parameters:

  • output: the value can a string (i.e. filename) or an object that has a write method; if this parameter is omitted then the image data is written to a buffer where overflow constraints are the responsibility of the client code.

  • format: the value can a string or a MIME-type; if this parameter is omitted then the format is deduced from the filetype extension otherwise an exception, PiCameraValueError is raised. The supported formats are JPEG, PNG, GIF, BMP, YUV, RGB, RGBA, BGR, BGRA and RAW.

  • use_video_port: the value is boolean and defaults to False whereby the higher quality image port is used.

  • resize: a two element tuple specifying the width and height of the image if the default value None needs to be overriden

  • splitter_port: see PiCamera documentation if you really need to use this parameter

  • bayer: if the value is True then the Exif metadata receives the raw bayer data from the camera's sensor

  • options: if the format is "jpeg" then the addtional parameters are:

  • quality: an integer from 1 to 100 representing the quality of the image; the default value is 85.

  • restart: the restart intervval for the encoder.

  • thumbnail: the size and quality of the thumbnail image as a tuple (width, height, quality) with the default being (64,48,35); if the value is None then no thumbnail is prepared.

  1. Capturing to a stream

  2. Capturing to a PIL Image

  3. Capturing resized images

  4. Capturing consistent images

  5. Capturing time-lapse sequences

  6. Capturing in low light

  7. Capturing to a network stream

  8. Recording video to a file

  9. Recording video to a stream

  10. Recording over multiple files

  11. Recording to a circular stream

  12. Recording to a network stream

  13. Overlaying images on the preview

  14. Overlaying text on the output

  15. Controlling the LED

Advanced Recipes

  1. Capturing to a numpy array

  2. Capturing to an OpenCV object

  3. Unencoded image capture in YUV format

  4. Unencoded image capture in RGB format

  5. Custom outputs

  6. Unconventional file outputs

  7. Rapid capture and processing

  8. Unencoded video capture

  9. Rapid capture and streaming

  10. Web streaming

  11. Capturing images whilst recording

  12. Recording at multiple resolutions

  13. Recording motion vector data

  14. Splitting to/from a circular stream

  15. Custom encoders

  16. Raw Bayer data captures

  17. Using a flash with the camera

Conclusions

References

Prepared for self-paced learning use only.

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