Minder scherp

Laten we nu proberen alleen de buitenste vorm van de grapefruits te vinden: de cirkels. Dat kun je doen door een sterkere Gaussiaanse filter toe te passen om het beeld eerst vloeiender te maken. Dit doe je door een grotere sigma op te geven in de canny-functie.

In deze oefening experimenteer je met sigma-waarden van de functie canny().

Grapefruits

Afbeelding is vooraf geladen als grapefruit.

De functie show_image is al vooraf geladen.

Deze oefening maakt deel uit van de cursus

Beeldverwerking in Python

Cursus bekijken

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Apply canny edge detector with a sigma of 1.8
canny_edges = canny(grapefruit, sigma=____)

Code bewerken en uitvoeren

Deze oefening maakt deel uit van de cursus

Beeldverwerking in Python

SkillTag.level.intermediateSkillTag.label

4.8+

Begin de cursus gratis

Jump into digital image structures and learn to process them! Extract data, transform and analyze images using NumPy and Scikit-image. With just a few lines of code, you will convert RGB images to grayscale, get data from them, obtain histograms containing very useful information, and separate objects from the background!

Exercise 1: Make images come alive with scikit-image Exercise 2: Is this gray or full of color?Exercise 3: RGB to grayscale Exercise 4: NumPy for images Exercise 5: Flipping out Exercise 6: Histograms Exercise 7: Getting started with thresholding Exercise 8: Apply global thresholding Exercise 9: When the background isn't that obvious Exercise 10: Trying other methods Exercise 11: Apply thresholding

You will learn to <strong>detect object shapes</strong> using edge detection filters, <strong>improve medical images</strong> with contrast enhancement <strong>and even enlarge pictures to five times its original size! </strong> You will also apply morphology to make thresholding more accurate when segmenting images and go to the next level of processing images with Python.

Exercise 1: Jump into filtering Exercise 2: Edge detection Exercise 3: Blurring to reduce noise Exercise 4: Contrast enhancement Exercise 5: What's the contrast of this image?Exercise 6: Medical images Exercise 7: Aerial image Exercise 8: Let's add some impact and contrast Exercise 9: Transformations Exercise 10: Aliasing, rotating and rescaling Exercise 11: Enlarging images Exercise 12: Proportionally resizing Exercise 13: Morphology Exercise 14: Handwritten letters Exercise 15: Improving thresholded image

So far, you have done some very cool things with your image processing skills! In this chapter, you will apply <strong>image restoration to remove objects, logos, text, or damaged areas</strong> in pictures! You will also learn how to apply noise, use segmentation to speed up processing, and find elements in images by their contours.

Exercise 1: Image restoration Exercise 2: Let's restore a damaged image Exercise 3: Removing logos Exercise 4: Noise Exercise 5: Let's make some noise!Exercise 6: Reducing noise Exercise 7: Reducing noise while preserving edges Exercise 8: Superpixels & segmentation Exercise 9: Number of pixels Exercise 10: Superpixel segmentation Exercise 11: Finding contours Exercise 12: Contouring shapes Exercise 13: Find contours of an image that is not binary Exercise 14: Count the dots in a dice's image

After completing this chapter, you will have a deeper knowledge of image processing as you will be able to <strong>detect edges, corners, and even faces! </strong> You will learn how to detect not just front faces but also face profiles, cat, or dogs. You will apply your skills to more complex <strong>real-world applications.</strong> Learn to master several widely used image processing techniques with very few lines of code!

Exercise 1: Randen vinden met Canny Exercise 2: Randen Exercise 3: Minder scherp

Huidige oefening

Exercise 4: Net om de hoek Exercise 5: Perspectief Exercise 6: Minder hoeken Exercise 7: Gezichtsdetectie Exercise 8: Is daar iemand?Exercise 9: Meerdere gezichten Exercise 10: Segmentatie en gezichtsdetectie Exercise 11: Toepassingen in de echte wereld Exercise 12: Privacybescherming Exercise 13: Help Sally haar afstudeerfoto herstellen Exercise 14: Geweldig werk!