I’m using the Cam H7 to identify objects that fill the field of view of the sensor. When training an ML algorithm, the training images are resized. I have not seen a method in OpenMV for resizing images (for example resize from QVGA 320x240 to 64x64).
A work-around I came up with is to use an extra_fb and combine the zoom of img.rotation_corr with a crop in img.copy.
extra_fb = sensor.alloc_extra_fb(64,64,sensor.GRAYSCALE)
img = sensor.snapshot()
resize to (88x66) = (320x240) * 0.275, resized image starts at x=116, y = 87
crop middle 64x64
roi_copy = (128,88,64,64)
extra_fb = img.copy(roi=roi_copy)
Is there a better way to do a resize in OpenMV?