Histogram
The Histogram shows the frequency of occurrence of the brightnesses in the image - from the shadows (left) to the highlights (right).
Library
ComputerVision/Images/Analysis
Description
The Histogram block displays a graphical representation of the distribution of pixel values in an image. It calculates the frequency (y-axis) of pixel values (x-axis) in an image by sorting them into the specified number of bins.
1D: Splits the image into three channels and calculates the histogram for each channel. It formats the input as an image.
2D: It requires HSV input. It calculates histogram for the H channel. The histogram can be used as input for the Back Projection block.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
dim | Dimension (Image/Hist) | 1 - 1D image 2 - 2D image | Scalar | 1 |
numBins | Number of Bins | Number of frequency sections | Scalar | |
externalActivation | External activation | This parameter defines if the block receives or inherits an external activation. When External Activation is used, an additional activation port is added to the block. Default is OFF. | Number | 0 |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
src | explicit | input | 1 | |
image/hist | explicit | output | 1 | |
Port 3 | activation | input | externalActivation |