diff options
Diffstat (limited to 'html/examples')
| -rw-r--r-- | html/examples/analyze.lua | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/html/examples/analyze.lua b/html/examples/analyze.lua index 7f06496..bc4a78e 100644 --- a/html/examples/analyze.lua +++ b/html/examples/analyze.lua @@ -1,28 +1,23 @@ require"imlua" require"imlua_process" -local filename = "lena.jpg" +local filename = "rice.png" -- image must be im.GRAY and im.BYTE for this script local image = im.FileImageLoad(filename) -local gray = im.ImageCreate(image:Width(), image:Height(), im.GRAY, image:DataType()) -local binary = im.ImageCreate(image:Width(), image:Height(), im.BINARY, image:DataType()) -local region = im.ImageCreate(image:Width(), image:Height(), im.GRAY, im.USHORT) - --- make it grayscale -im.ConvertColorSpace(image, gray) -gray:Save("lena_gray.jpg", "JPEG") +local binary = im.ImageCreateBased(image, nil, nil, im.BINARY, nil) +local region = im.ImageCreateBased(image, nil, nil, nil, im.USHORT) -- make it binary -im.ProcessSliceThreshold(gray, binary, 0, 128) -binary:Save("lena_binary.jpg", "JPEG") +im.ProcessPercentThreshold(image, binary, 70) --lots of background -local count = im.AnalyzeFindRegions(binary, region, 4, 1) +-- search for closed regions, don't count objects that touches the image borders +local count = im.AnalyzeFindRegions(binary, region, 4, 0) print("regions: ", count) -local region2 = im.ImageCreate(image:Width(), image:Height(), im.GRAY, im.BYTE) -im.ConvertDataType(region, region2, 0, 0, 0, 0) +local area = im.AnalyzeMeasureArea(region, count) +local major_slope, major_length, minor_slope, minor_length = im.AnalyzeMeasurePrincipalAxis(region, area, nil, nil, count) -local region3 = im.ImageCreate(image:Width(), image:Height(), im.MAP, im.BYTE) -im.ConvertColorSpace(region2, region3) -region3:SetPalette(im.PaletteHighContrast(), 256) -region3:Save("lena_region.gif", "GIF") +print("object", "area", "major length", "minor length") +for r=1, count do + print(r, area[r-1], string.format("%5.5g", major_length[r-1]), string.format("%5.5g", minor_length[r-1])) +end |