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The same cut will apply to all images, so make sure that the are for detection is in the same portion of the image among all the images. |
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Scale
Scale lets you adjust the resolution of the image.
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Remove background function can help you with focusing only on the main object. Offers two types of background removal (histogram and canny), and each can be useful for different kinds of images. The Canny background removal uses uses either canny edge detector, dilation, and erosion or OpenCV histogram.
Canny Edge Histogram
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When removing background using the Canny Edge detector, you can set the blur size (it blurs the image based on the data of pixels in an NxN rectangle, you set the N in the “Blur” field). Threshold is for setting the size of the edges that will be kept. The rest are settings for Dilataion and Erosion.
Histogram removes background based on the frequency of colors of pixels. The pixel values with frequency between Extreme 1 and Extreme 2 will be kept.
The Background Color table can be used to choose which color to set the removed part of the image to.
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Remove background is useful when the background is distracting and you want the AI model to focus only on a particular object on the image. |
Unifier
Unifies the position and angle of objects or just puts the angle of the object into Context (if this option is ticked). Remove background that needs to be used before Unifier and have the same background color selected.
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Although this seems very useful for unifying the images, it takes a long time and thus it’s not recommended for projects that are required to run within a strict time limit. |
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Contrast equalisation
Equalises the contrast using the CLAHE algorithm, which works with a histogram of a pixel and its surroundings (depending on the kernel size). The clip limit determines the value at which the histogram is clipped. Details in the OpenCV documentation for CLAHE and histogram equalisation.
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This function lets you adjust the gamma value.
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Very useful when the input image is too bright or too dark. |
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Camera calibration
This function can be used to remove some camera-related distortions of the image.
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