Method for measuring area of Hydrilla verticillata leaves by modified image processing method
A technology of black algae and image correction, applied in measuring devices, instruments, optical devices, etc., can solve the problem that it is difficult to measure the leaf area of black algae
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Embodiment 1
[0036] This example involves determining the coefficients K and M in equation (2) described herein.
[0037] S1: Take 10 different leaves of Hydrilla verticillum and number them from 1# to 10# in sequence; then place the numbered leaves of Hydrilla verticillium in the center of the opaque plate with black border, illuminate the opaque plate with a light source, control the light intensity to 1800 lux, and use pixels A 1200dpi digital camera shoots down the leaves from a position 50cm directly above the center of the opaque plate, and obtains its image. Use computer interpretation to obtain the deformed leaf area of H. verticillium with different numbers, record the leaf area of H. verticillium measured by the image processing method from 1# to 10#, and record them as A1 to A10 in turn. See Table 1 for specific results. The schematic diagram of the method for measuring the leaf area of this implementation can be found in figure 1 .
[0038] S2: Use the grid method to me...
Embodiment 2
[0043]This example involves determining the coefficients K and M in equation (2) described herein.
[0044] S1: Take 10 different leaves of Hydrilla verticillum and number them from 1# to 10# in sequence; then place the numbered leaves of Hydrilla verticillium in the center of the opaque plate with black border, illuminate the opaque plate with a light source, control the light intensity to 1800 lux, and use pixels A 1400dpi digital camera shoots down the leaves from a position 70cm directly above the center of the opaque plate, and obtains its image. Use computer interpretation to obtain the deformed leaf area of H. verticillium with different numbers, record the leaf area of H. verticillium measured by the image processing method from 1# to 10#, and record them as A1 to A10 in turn. See Table 2 for specific results.
[0045] S2: Use the grid method to measure the leaves of Hydrilla verticillium 1# to 10#, record the leaf area of No. 1# to 10#, and obtain the leaf area ...
Embodiment 3
[0050] This example involves determining the coefficients K and M in equation (2) described herein.
[0051] S1: Take 10 different leaves of Hydrilla verticillum and number them sequentially from 1# to 10#; then place the numbered leaves of Hydrilla verticillium in the center of the opaque plate with black border, illuminate the opaque plate with a light source, control the light intensity to 1200 lux, and use pixels A 2400dpi digital camera shoots down the leaves from a position 50cm directly above the center of the opaque plate, and obtains its image. Use computer interpretation to obtain the deformed leaf area of H. verticillium with different numbers, record the leaf area of H. verticillium measured by the image processing method from 1# to 10#, and record them as A1 to A10 in turn. See Table 3 for specific results.
[0052] S2: Use the grid method to measure the leaves of Hydrilla verticillium 1# to 10#, record the leaf area of No. 1# to 10#, and obtain the leaf are...
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