Image stitching for mapping in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load images for stitching.

Drone Programming

images = [cv2.imread([1]) for file in image_files]

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Acv2

Bimages

Cimage_files

Dfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using the list name instead of the loop variable.

Using the wrong variable name that does not hold filenames.

The variable file holds each filename in the list image_files. We use it to load each image with cv2.imread().

2fill in blank

medium

Complete the code to initialize the stitcher object.

Drone Programming

stitcher = cv2.Stitcher_create([1])

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Acv2.STITCHER_PANORAMA

Bcv2.IMREAD_COLOR

Ccv2.INTER_LINEAR

Dcv2.COLOR_BGR2GRAY

Attempts:

3 left

💡 Hint

Common Mistakes

Using image reading or color conversion constants instead of stitcher mode.

Passing no argument or wrong argument type.

cv2.STITCHER_PANORAMA tells the stitcher to create a panorama from images.

3fill in blank

hard

Fix the error in the code to stitch images correctly.

Drone Programming

status, stitched = stitcher.[1](images)

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Amerge

Bstitch

Ccombine

Dblend

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names like 'combine' or 'merge'.

Trying to call a non-existent method.

The correct method to stitch images in OpenCV is stitch().

4fill in blank

hard

Fill both blanks to check if stitching was successful and save the result.

Drone Programming

if status == [1]:
    cv2.[2]('stitched_output.jpg', stitched)

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Acv2.imwrite

B0

C1

Dcv2.imwriteAsync

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing status codes for success.

Using asynchronous save function which is not standard.

In OpenCV stitching, 0 (cv2.Stitcher_OK) means success. We use cv2.imwrite to save the image.

5fill in blank

hard

Fill all three blanks to create a dictionary of image sizes for mapping.

Drone Programming

image_sizes = [1]((file, (img.shape[[2]], img.shape[[3]])) for file, img in zip(image_files, images))

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Adict

B0

C1

Dlen

Attempts:

3 left

💡 Hint

Common Mistakes

Using list or set instead of dict.

Mixing up height and width indices.

We use dict to create a dictionary. img.shape[0] is height and img.shape[1] is width of the image.