1. A wiper blade apparatus comprising: a spoiler(200) to minimize air resistance in an upper part; a blade (300) of soft rubber in a lower part; a rail spring (100) in a middle part; and a clamp(400) to be mounted in middle of the said rail spring(100),
wherein the said blade(300) is coupled with a blade-coupling unit(10) after fixing the said unit(10) to the said rail spring (100),
further comprising more than one reinforcing sections(120) in linear holes(110) that are made by having the rail spring (100) perforated,
wherein the clamp comprises four coupling protrusions(410) and hook holes(411), respectively,
wherein the rail spring comprises four hook grooves(131) and hook projections(132) respectively,
further comprising multiple clip installation sections (210) embedding grooves for prevention of the spoiler from breaking away(211) in external sides of -shape wings of the spoiler and multiple clips for prevention of the spoiler from breaking away(220), which are fixed to the said clip installation sections, preventing the spoiler from separating, by pressing holding the spoiler and part of the rail spring together.
2. The wiper blade apparatus of claim 1, wherein the blade-coupling unit(10) is inserted into the linear holes(110) of the rail spring(100) and includes a protrusion(20) forming an insertion groove(21), wherein a wedge(40) and the blade-coupling unit(10) are coupled with each other as a wedge foot(41) of the wedge(40) is inserted into the insertion groove(21) of the blade-coupling unit(10) ensuring solid coupling with the rail spring.
3. The wiper blade apparatus of claim 2 comprising a -shape loop(30) for the blade-coupling unit (10) in bilateral symmetry, which enables the blade to be clamped safely and solidly the loop being closely contacted by with the surface of the rail spring.
4. The wiper blade apparatus of claim 3, wherein the blade-coupling unit(10) is equally divided and arrayed in specific short parts so as to act in concert with the resilience of the rail spring.
5. The wiper blade apparatus of claim 3, wherein resilience may be secured sufficiently in the coupling unit (10) by forming lashes(31) from a top of the protrusion(20) to a specific depth in the -shape loop(30) of the blade-coupling unit(10).
6. The wiper blade apparatus of claim 2, wherein the blade-coupling unit(10) is equally divided and arrayed in specific short parts so as to act in concert with the resilience of the rail spring.
7. The wiper blade apparatus of claim 2, wherein resilience may be secured sufficiently in the coupling unit (10) by forming lashes(31) from a top of the protrusion(20) to a specific depth in a -shape loop(30) of the blade-coupling unit(10).
8. The wiper blade apparatus of claim 1, wherein the spoiler(200), which is installed on an upper part of the rail spring(100), forms loop insertion grooves(230) at both sides of its bottom and a wedge(40) forms loops(42) at both edges of an upper part thereof so as to be inserted into the loop insertion grooves (230).
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A surveillance apparatus comprising:
input means for inputting images in a time series;
background image memory means for registering a plurality of background images from said images;
difference image memory means for calculating a minimum value of difference degree of an absolute value of a difference between said background image and an image afresh inputted for each pixel and storing said difference; and
judgment means for judging an existenceabsence of an invading object on the basis of said difference degree.
2. A surveillance apparatus according to claim 1, wherein said background image comprises a single or a plurality of pixel values registered for each pixel.
3. A surveillance apparatus according to claim 2, wherein:
said background image is registered or erased for each pixel;
erasing is determined on the basis of a period from a registration time of said pixel to a time at which said pixel is last looked up, and a period from a time at which said pixel is last looked up to a present time;
when registration is made, a new pixel value is written to an empty region if said empty region exists in said background image memory means, and if said empty region does not exist, importance of each pixel value of a corresponding pixel is calculated and is overwritten to an image value having the lowest degree of importance.
4. A surveillance apparatus according to claim 1, which further includes:
memory means for recording said image inputted afresh when said judgment means judges that an invading object exists.
5. A surveillance apparatus according to claim 1, wherein:
said difference image memory means includes minimum value image memory means for storing a minimum value image comprising an absolute value of a difference for each pixel and block-wise mean image memory means for dividing said minimum value image into blocks, and calculating and storing a mean value of an absolute value of a difference for each block; and
said judgment means judges an existenceabsence of an invading object on the basis of a time series change of said mean value.
6. A recording medium having recorded thereon a surveillance program executed by a computer including inputoutput means, a CPU and a memory, said program comprising the steps of:
inputting in a time series images from said inputoutput means;
registering a plurality of background images from said images into said memory;
calculating a minimum value of difference degree of an absolute value of a difference between said background image and an image inputted afresh for each pixel, and storing said minimum value in said memory; and
judging an existenceabsence of an invading object on the basis of said difference degree.
7. A recording medium according to claim 6, wherein said background image comprises a single or a plurality of pixel values registered for each pixel.
8. A recording medium according to claim 7, wherein:
said surveillance program includes a step of erasing said background image;
in said erasing step, a pixel to be erased is decided on the basis of a period from a registration time of each of said pixel values to a time at which it is last looked up, and a period from the time at which it is last looked up to a present time; and
in said registration step, a new pixel value is written to an empty region if said empty region exists in said background image memory means, and if said empty region does not exist, a degree of importance for each pixel value of a corresponding pixel is calculated and is overwritten to a pixel value having the lowest degree of importance.
9. A recording medium according to claim 6, wherein when said surveillance program further includes a step of recording said image inputted afresh when said judgment means judges that an invading object exists.
10. A recording medium according to claim 6, wherein said surveillance program further includes the steps of:
storing a minimum value image comprising an absolute value of a difference for each pixel; and
dividing said minimum value image into blocks, and calculating and storing a mean value of an absolute value of a difference for each of said blocks; and wherein:
said judgment step judges an existenceabsence of an invading object on the basis of a time series change of said mean value.