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Questions - mask

Access pixel value of mask using opencv

I got a problem where I need to access pixels of a opencv Mat image container. I use opencv inRange function to create a mask. In that mask I need to check the value of different pixels, but I won't r...
test-img

Elfie

c++

opencv

pixel

mask

mat

Votes: 0

Answers: 1

Latest Answer

I finally found the answer to my own question. It works when I use uchar: maskR.at<uchar>(position.x, position.y) == 255 I thought this wouldn't work because printing this with std::cout wouldn...
test-img

Elfie

How to create a list of several rasters from a crop and mask (cut) from shapefile in R

I have 14 raster files from each year of land use. I would like to crop these rasters using my shapefile area of interest. With these cut rasters I would like to create a list where each element repre...
test-img

wesleysc352

r

raster

crop

mask

shapefile

Votes: 0

Answers: 1

Latest Answer

The problem is that you need to also subset the list_raster object inside the for loop. list_raster_cut[[i]] <- list_raster[[i]] %>% raster::crop(shp_area)%>% raster::mask(sh...
test-img

Jonathan V. Sol&#243;rzano

Artifacts (line) with masks in SVG

Artifacts (two fine lines in the corner) appear in a SVG that uses a mask. I tried several browsers and zoom / resolutions, but those artifacts don't go away. <svg xmlns="http://www.w3.org/2000...
test-img

strarsis

svg

mask

artifacts

Votes: 0

Answers: 1

Latest Answer

Applying your x/y offsets and scaling directly to the <mask> should solve the problem: body { background: #ccc } svg { width: 250px; display: inline-block; } <svg xmlns="http://ww...
test-img

herrstrietzel

Unexcpected behavior in numpy when changing values by conditions

I have numpy array with the shape (104,107) and values between 0- 0.6 : I want to classify the image by three classes: Pixels with value larger than 0.25 (high_bord) ->get value 1 Pixels with val...
test-img

Reut

python

numpy

conditional-statements

mask

Votes: 0

Answers: 0

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