Just black and white layers instead of sentinel imagery

[NiklasJordan]

I've started using geemap just a few days ago. But I'm stalling at one point. I tried to filter Sentinel-2 data. I've tried multiple things, but always the same result. Why I've got just black or white layer and not the images?

For the 'image' I've just got a white layer and for 'image2' I've got a black layer. But I dont know why. My script is based on this example: https://github.com/giswqs/earthengine-py-notebooks/blob/master/ImageCollection/filtered_composite.ipynb

# Add Earth Engine dataset
Map.setCenter(-110, 40, 7)

# Filter to only include images within the colorado and utah boundaries.
#polygon = ee.Geometry.Polygon([[
#    [-109.05, 37.0], [-102.05, 37.0], [-102.05, 41.0],   # colorado
#    [-109.05, 41.0], [-111.05, 41.0], [-111.05, 42.0],   # utah
#    [-114.05, 42.0], [-114.05, 37.0], [-109.05, 37.0]]])

# Add Earth Engine dataset
collection = (ee.ImageCollection('COPERNICUS/S2_SR')
              .filterDate("2020-04-01", "2020-07-01")
#              .filterBounds(polygon)
             )

# Select the median pixel.
image1 = collection.median()

# Select the red, green and blue bands.
image = image1.select('B4', 'B3', 'B2')
image2 = image1.select('SCL')
Map.addLayer(image, {'gain': [1, 1, 1]})
Map.addLayer(image2)

[giswqs]

You need to set the visualization parameters, such as min and max. You can use the Inspector tool to inspect the pixel value range and set the vis parameters accordingly.

Map.addLayer(image, {'min': 100, 'max': 3000}, 'image')
Map.addLayer(image2, {'min': 1, 'max': 10}, 'image2')

[NiklasJordan]

Great, this works! Thanks a lot for your help!