Apparatus for evaluating characteristics of the images of objects
First Claim
1. An apparatus for evaluating characteristics of the image of an object, comprising:
- scanning means effecting with the help of a scanning raster line-by-line and frame-by-frame scanning of the image of said object with conversion of said image into a video signal;
a video signal discriminator connected to said scanning means and adapted to form square pulses proportional to the lengths of the chords of said image of said object;
delay means connected to the output of said video signal discriminator, wherein said square pulses coming from said video signal discriminator are delayed for a time necessary for effecting synchronous comparison of said square pulses related to a current and delayed lines of said raster;
a synchronous coincidence unit having a first input, a second input and an output, said first input being connected to the output of said video signal discriminator directly and said second input being connected to said output of said video signal discriminator through said delay means, for effecting comparison by the number of coincidences of the fronts of said square pulses related to said current and delayed lines;
a synchronous subtraction unit having a first input, a second input and an output, said first input being connected to said output of said video signal discriminator directly and said second input being connected to the same said output through said delay means, for effecting subtraction of the duration of said square pulses proportional to the lengths of said chords of said image of the object in said current and delayed lines;
a gate means having a first input, a second input and an output, said first input being connected to said output of said synchronous subtraction unit;
a generator of quantizing pulses having its output connected to said second input of said gate means so that the square pulses of which the duration is proportional to the difference between the lengths of the chords in said current and delayed lines of said image of said object, obtained as a result of said subtraction, are filled with quantizing pulses coming from the output of said generator of quantizing pulses to said second input of said gate means;
a unit for computation of the perimeter of said image of said object, having a first input, a second input and a third input and a third input and having said first input thereof connected to said output of said gate means, said second input thereof being connected to said output of said synchronous subtraction unit and said third input thereof being connected to said output of said synchronous coincidence unit so that within said perimeter computation unit a sequence of the quantized square pulses proportional to the difference between the lengths of the chords of said image in said current and delayed lines is used for approximation of a part of the perimeter of said image of said object, the value thus obtained having added thereto a quantity of interline spaces of said raster equal to the number of the coincidences of the fronts of said square pulses proportional to the lengths of the chords of said image, detected by said synchronous coincidence unit, in which mannner said perimeter computation unit effects approximation of the full perimeter of said image of said object.
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Abstract
The disclosed apparatus for evaluation of characteristics of the images of objects consists of a delay unit connected to the output of a video signal discriminator, wherein the square pulses coming from the output of the discriminator of the video signal are delayed for a time necessary for effecting synchronous coincidence of the respective square pulses of the current and delayed lines of the raster of the scanning unit. The apparatus further includes a synchronous coincidence unit and a synchronous subtraction unit, each one of them being connected by its respective input to the output of the video signal discriminator both directly and through the delay unit. The output of the synchronous subtraction unit is connected to a gate connected to the output of the generator of quantizing pulses. The outputs of the synchronous coincidence unit and of the synchronous subtraction unit are connected to a perimeter computation unit directly, while the output of the synchronous subtraction unit is additionally connected to the perimeter computation unit through a gate.
13 Citations
23 Claims
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1. An apparatus for evaluating characteristics of the image of an object, comprising:
- scanning means effecting with the help of a scanning raster line-by-line and frame-by-frame scanning of the image of said object with conversion of said image into a video signal;
a video signal discriminator connected to said scanning means and adapted to form square pulses proportional to the lengths of the chords of said image of said object;
delay means connected to the output of said video signal discriminator, wherein said square pulses coming from said video signal discriminator are delayed for a time necessary for effecting synchronous comparison of said square pulses related to a current and delayed lines of said raster;
a synchronous coincidence unit having a first input, a second input and an output, said first input being connected to the output of said video signal discriminator directly and said second input being connected to said output of said video signal discriminator through said delay means, for effecting comparison by the number of coincidences of the fronts of said square pulses related to said current and delayed lines;
a synchronous subtraction unit having a first input, a second input and an output, said first input being connected to said output of said video signal discriminator directly and said second input being connected to the same said output through said delay means, for effecting subtraction of the duration of said square pulses proportional to the lengths of said chords of said image of the object in said current and delayed lines;
a gate means having a first input, a second input and an output, said first input being connected to said output of said synchronous subtraction unit;
a generator of quantizing pulses having its output connected to said second input of said gate means so that the square pulses of which the duration is proportional to the difference between the lengths of the chords in said current and delayed lines of said image of said object, obtained as a result of said subtraction, are filled with quantizing pulses coming from the output of said generator of quantizing pulses to said second input of said gate means;
a unit for computation of the perimeter of said image of said object, having a first input, a second input and a third input and a third input and having said first input thereof connected to said output of said gate means, said second input thereof being connected to said output of said synchronous subtraction unit and said third input thereof being connected to said output of said synchronous coincidence unit so that within said perimeter computation unit a sequence of the quantized square pulses proportional to the difference between the lengths of the chords of said image in said current and delayed lines is used for approximation of a part of the perimeter of said image of said object, the value thus obtained having added thereto a quantity of interline spaces of said raster equal to the number of the coincidences of the fronts of said square pulses proportional to the lengths of the chords of said image, detected by said synchronous coincidence unit, in which mannner said perimeter computation unit effects approximation of the full perimeter of said image of said object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- scanning means effecting with the help of a scanning raster line-by-line and frame-by-frame scanning of the image of said object with conversion of said image into a video signal;
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17. An apparatus for evaluating characteristics of the image of an object, comprising:
- scanning means effecting with the help of a raster line-by-line and frame-by-frame scanning of said image of said object and converting it into a video signal;
a video signal discriminator connected to said scanning means and forming square pulses proportional to the lengths of the chords of said image;
a delay means electrically connected with the ouput of said video signal discriminator, wherein said square pulses coming from said video signal discriminator are delayed for a time necessary for effecting synchronous comparison of said square pulses representing a current line and a delayed line of said raster;
a synchronous coincidence unit having a first input, a second input and an output, having said first input thereof electrically connected with said output of said video signal discriminator and having said second input thereof connected with said output of said video signal discriminator through said delay means, for effecting a comparison by the number of coincidences of the fronts of said square pulses representing said current and delayed lines;
a synchronous subtraction unit having a first input, a second input and output, said first input thereof being electrically connected with said output of said video signal discriminator, said second input thereof being electrically connected with said output of said video signal discriminator through said delay means, for effecting subtraction by the duration of said square pulses proportional to the lengths of the chords of said image in said current and delayed lines;
a first gate means having a first input, a second input and an output, said first input being connected to said output of said synchronous subtraction unit;
a generator of quantizing pulses having the output thereof connected to said second input of said first gate means, so that the square pulses having proportional duration proportionall to the differences between the lengths of the chords in said current and delayed lines of said image, produced as a result of the subtraction, are filled with quantizing pulses coming from said output of said generator of quantizing pulses to said second input of said first gate means;
a unit for computation of the perimeter of said image of said object, having a first input, a second input and a third input, said first being connected to said output of said first gate means, said second input being connected to said output of said synchronous subtraction unit and said third input being connected to said output of said synchronous coincidence unit, so that within said perimeter computation unit the trains of the quantized square pulses proportional to the differences between the lengths of the chords of said image in said current and delayed lines are processed for approximation of a part of the perimeter of said image of said object, there being added to the value thus obtained a number of inter-line spaces equal to the number of the coincidences of the fronts of said square pulses proportional to the lengths of the chords of said image, determined by said synchronous coincidence unit, in which way the full perimeter of said image of said object is approximated;
a second gate means having a first input, a second input and an output, said first input being electrically connected with said output of said video signal discriminator, said second input being connected to said output of said generator of quantizing pulses;
an area counter having the input thereof connected with said output of said second gate means, wherein the sum total of the duration of said square pulses proportional to the lengths of the chords of said image is determined to represent the area of said object;
a form factor determination unit having a first input and a second input, said inputs being connected, respectively, to said output of said perimeter computation unit and to the output of said area counter, so that there is effected within said form factor determination unit division of the squared value of the perimeter by said sum total of the duration of said square pulses, representing the area of said image of said object. - View Dependent Claims (18, 19, 20, 21, 22, 23)
- scanning means effecting with the help of a raster line-by-line and frame-by-frame scanning of said image of said object and converting it into a video signal;
Specification