Maize Phosphorus Leaf Deficiency (MPLD) Database | Compact Scientific Camera (original-processed)
Description
This database presents samples of maize leaves placed on a withe background, representing three levels of phosphorus deficiency: complete absence of the nutrient (labeled -P), half dose of the required phosphorus for normal plant development (-P50), and complete supply (C).
Its composed of two folders:
- Original_dataset: 722 jpg images of 1280 x 1020 pixels size divided into '_C', '-P' and '-P50' folders for class labels.
- Processed_dataset: 2433 png images of 224 x 224 pixels size divided into '-C', '-P' and '-P50' folders for class labels.
Methods
Data collection
Image acquisition was done by searching a diversity of conditions, although the plants were grown in laboratory conditions. In this way, photographs included the growth stages of seedling, jointing, and flowering. The images were acquired inside a plastic shed, involving natural illumination, and five consecutive images were taken by plant.
Acquisition device was a compact scientific camera (ThorLabs DCC1645C-HQ).
Image preprocessing and augmentation
The original images underwent a preprocessing stage in terms of cropping and resizing by two methods done simultaneously:
- Cut to central square: Image cropped to a central square.
- Cuadrant division: Square image divided into four equal parts.
All cropped images were resized to 224x224 pixels size.
As cuadrant division method can generate sub-images with black content or a minimum portion of the leaf, and these images can confuse the algorithm, a suffix is added to the images cosidered as empty on the Processed_dataset.
Notes
Composition of Processed_dataset folder
Each image has a filename as 'S<xx>-T-<class>-<yy><_n>
Were
- <xx> goes from 05 to 10 and represents the week of maize growth at the time image was collected.
- <class> could be C, P or P50
- <yy> is a unique id for each image and
- <n> Could be present or not, indicating the number of the cuadrant obtained from the Cuadrant Division process, and goes from 0 to 3
- In addition, some images have the suffix '_EMPTY' which leads to a blank image or one that does not have enough leaf content.
For each image taken from a single leaf, there are 5 processed images in this folder.
Files
Files
(208.8 MB)
| Name | Size | Download all |
|---|---|---|
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md5:9228abbf88abee25ed55bf91581a2ac3
|
43.7 MB | Download |
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md5:9de0ba2a2da1d14f91b69b7b8e10bfd0
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165.1 MB | Download |
Additional details
Dates
- Collected
-
2022-05-13