GEE-Select pixels whose values equal to a given value in an image

How do I extract pixel values from an image?

The procedure for extraction is :

1. import the Image module of PIL into the shell: >>>from PIL import Image.
2. create an image object and open the image for reading mode: >>>im = Image.open(‘myfile.png’, ‘ r’)
3. we use a function of Image module called getdata() to extract the pixel values.

How to extract pixel values from image in matlab?

To determine the values of one or more pixels in an image and return the values in a variable, use the impixel function. You can specify the pixels by passing their coordinates as input arguments or you can select the pixels interactively using a mouse.

What is pixel value in image processing?

Each of the pixels that represents an image stored inside a computer has a pixel value which describes how bright that pixel is, and/or what color it should be. In the simplest case of binary images, the pixel value is a 1-bit number indicating either foreground or background.

What is the range of values in binary for a pixel?

For most images, pixel values are integers that range from 0 (black) to 255 (white).

How do I extract RGB values from an image?

Click the ‘print screen’ button on your keyboard to take a snapshot of your screen. Paste the image into MS Paint. 2. Click on the color selector icon (the eyedropper), and then click on the color of in- terest to select it, then click on ‘edit color’.

Can we extract data from image?

Optical Character Recognition or OCR is a technology that enables us to extract data from an image, PDF file, scanned document, etc., and paste it into a document (like MS Word), where we can then edit it directly.
 

How do you find the total number of pixel of an image give an example?

To find the total number of pixels, multiply the width and height together. In this case, 4700 pixels x 3133 pixels = 14,725,100 pixels.

How do I find the pixel coordinates of an image?

Get Coordinates from an Image

1. Open the image toolbar. Click an image to open the image toolbar:
2. Choose the coordinates tool. Choose the coordinates tool in the toolbar:
3. Click image points.
4. Copy image coordinates to the clipboard.
5. Paste the image coordinates into an expression.

How do I find the pixel number of a picture?

To check the pixel count of an image:

1. Right-click on the image (or, on a Mac, control-click).
2. Choose Properties or Get info.
3. Click the Details tab. (or, on a Mac, More info).
4. You’ll see the image dimensions in pixels.

How do I find the pixel coordinates of an image?

Get Coordinates from an Image

1. Open the image toolbar. Click an image to open the image toolbar:
2. Choose the coordinates tool. Choose the coordinates tool in the toolbar:
3. Click image points.
4. Copy image coordinates to the clipboard.
5. Paste the image coordinates into an expression.

How do I get data points from a photo?

Extracting data from graph image

1. Step 1: Upload the image to PlotDigitizer. Go to PlotDigitizer’s free online app, and upload the image by clicking or drag-dropping.
2. Step 2: Select the graph type.
3. Step 3: Calibrating the axes.
4. Step 4: Extracting data points from the plot.
5. Step 5: Exporting the extracted data.