1. An optical protective filter, comprising:
at least one first and one second partial lens (1, 3),
wherein:
the first partial lens (1) is manufactured out of a flexible substrate (4),
a thin film filter (2) is applied to the substrate (4), and
the thin film filter (2) comprises at least one metallic layer (8) with a layer thickness of between 2 nm and 100 nm.
2. The optical protective filter in accordance with claim 1, wherein the first partial lens (1) and also the second partial lens (3) comprise a curvature in at least one direction.
3. The optical protective filter in accordance with claim 1, wherein the partial lenses (1, 3) lie against one another with a positive fit and are glued together.
4. The optical protective filter in accordance with claim 1, wherein an external partial lens (3) consists of a first material with increased resistance against blows, and wherein an internal partial lens (1) is made of a second material which differs from the first material.
5. The optical protective filter in accordance with claim 1, wherein the thin film filter (2) alternatingly comprises dielectric layers (6, 7) and metallic layers (8), wherein the dielectric layers (7, 8) are at least ten times thicker than the metallic layers (8), and the two external layers (6) of the thin film filter (2) are dielectric layers.
6. The optical protective filter in accordance with claim 1, which acts as a laser protection filter and in a wavelength range of between 800 nm up to 2,000 nm, and achieves a protection with a protection level of higher than or equal to L4, and which has a transmissibility of over 30%.
7. The optical protective filter in accordance with claim 6, in which the material of one or of several partial lens (1, 3, 5) comprises a color dye which causes the optical protective filter at a wavelength of 532 nm to exhibit a protection level greater than or equal to L4.
8. The optical protective filter in accordance with claim 1, further comprising one or several optical filter layers (11) with variable transmissibility, wherein these filter layers (11) are arranged on curved or flexible substrates.
9. The optical protective filter in accordance with claim 8, wherein the one or the several filter layers (11) with variable transmissibility are electrically controllable and comprise a liquid crystal andor a guest-host cell.
10. The optical protective filter in accordance with claim 8, wherein the one or the several filter layers (11) with variable transmissibility are automatically darkening and comprise a photochromic layer.
11. The optical protective filter in accordance with claim 8, further comprising two or more filter layers (11) with variable transmissibility, which are electrically controllable and comprise a liquid crystal andor a guest-host cell and are arranged in a series configuration.
12. Protective device for welders, in particular a protection mask for welders or protection goggles for welders, comprising an optical protective filter (1, 3) in accordance with claim 1.
13. method for the manufacture of an optical protective filter in accordance with claim 1, which method comprises the following steps:
Providing a flexible substrate (4);
applying the thin film filter (2) to the flexible substrate (4) in a flat condition, and by means of this, forming a first partial lens (1);
bending the first partial lens (1) and joining the first partial lens (1) to a second partial lens (3).
14. The method for the manufacture of an optical protective filter in accordance with claim 13, wherein the step of bending and joining the first partial lens (1) comprises:
Pressing the first partial lens (1) against a curved surface of the second partial lens (3), and by means of this bending the first partial lens (1);
fixing the first partial lens (1) relative to the second partial lens (3).
15. The method for the manufacture of an optical protective filter in accordance with claim 13, wherein the step of joining the first partial lens with the second partial lens comprises:
Bending the first partial lens (1) and inserting it into an injection molding mold (9);
injection molding the second partial lens (3) to the first partial lens (1).
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A decoding apparatus for decoding compression data comprising:
a reference value extracting unit that extracts reference compression data to be referred for the compression data to be processed; and
a decoded data generating unit that generates decoded data corresponding to the compression data based on the reference compression data extracted by the reference value extracting unit and the compression data.
2. The decoding apparatus according to claim 1,
wherein the decoded data generating unit multiplies dequantization values corresponding to the reference compression data and dequantization values corresponding to the compression data by preset weight coefficients and sums up results of the multiplication, a resultant value of the summation being set as a dequantization value of the compression data.
3. The decoding apparatus according to claim 1 further comprising:
a difference calculating unit that calculates differences between the dequantization values corresponding to the reference compression data and the dequantization values corresponding to the compression data, and
wherein the decoded data generating unit determines the dequantization values of the compression data based on the reference compression data having the differences, which are less than the preset value.
4. The decoding apparatus according to claim 1, wherein the decoded data are dequantization values of quantization values quantized with a preset quantization width,
wherein the decoded data generating unit generates the dequantization values corresponding to the compression data based on the reference compression data and the compression data, and
wherein the decoding apparatus further comprises a correcting unit that corrects the dequantization values generated by the decoded data generating unit to fall within the range of the quantization width.
5. The decoding apparatus according to claim 1, wherein the compression data are quantization indexes generated by a transform encoding process, and
wherein the decoded data generating unit generates decoded data corresponding to the quantization indexes without using the reference compression data when the quantization indexes to be processed are 0.
6. The decoding apparatus according to claim 2, wherein the compression data are quantization indexes corresponding to transform coefficients generated by a transform encoding process, and
wherein the decoded data generating unit uses different weight coefficients depending on whether the quantization indexes to be processed correspond to an AC component or a DC component.
7. The decoding apparatus according to claim 2, wherein the compression data are quantization indexes corresponding to transform coefficients generated by a transform encoding process,
wherein the decoding apparatus further comprises a coefficient selecting unit that selects the weight coefficients depending on the quantization indexes to be processed or the kind of transform coefficients corresponding to the quantization indexes, and
wherein the decoded data generating unit calculates the dequantization values of the compression data using the weight coefficients selected by the coefficient selecting unit.
8. The decoding apparatus according to claim 2, wherein the compression data are quantization indexes corresponding to transform coefficients generated by a transform encoding process,
wherein the decoding apparatus further comprises a coefficient selecting unit for selecting the weight coefficients depending on the standard deviation of transform coefficients corresponding to the quantization indexes to be processed and a quantization width corresponding to the quantization indexes, and
wherein the decoded data generating unit calculates the dequantization values of the compression data using the weight coefficients selected by the coefficient selecting unit.
9. The decoding apparatus according to claim 1, further comprising:
a fine line determining unit that determines whether the compression data to be processed correspond to fine lines or isolated points, and
wherein the decoded data generating unit generates decoded data corresponding to the compression data without using the reference compression data when the fine line determining unit determines that the compression data correspond to the fine lines or the isolated points.
10. The decoding apparatus according to claim 2, wherein the decoded data generating unit calculates the dequantization values of the compression data using weight coefficients attached to the compression data.
11. A decoding apparatus comprising:
a reference signal extracting unit that extracts signals in the neighborhood of a central signal to be processed;
a difference calculating unit that calculates differences between the neighboring signals extracted by the reference signal extracting unit and the central signal; and
a filter processing unit that performs a preset filter process for the differences calculated by the difference calculating unit.
12. The decoding apparatus according to claim 11, wherein the filter processing unit performs the filter process using filters having filter coefficients of more than 0, the total sum of filter coefficients being less than \xbd.
13. A decoding method for decoding compression data comprising:
extracting reference compression data to be referred for the compression data to be processed; and
generating decoded data corresponding to the compression data based on the extracted reference compression data and the compression data.
14. A decoding method comprising:
calculating weight coefficients based on differences between transform coefficients calculated in a transform encoding process and quantization values of the transform coefficients;
attaching the calculated weight coefficients to code data of the transform coefficients; and
generating decoded data corresponding to compression data based on the weight coefficients attached to the code data, the compression data included in the code data, and reference compression data included in the code data.
15. A program product for causing a computer system to execute procedures comprising:
extracting reference compression data to be referred for compression data to be processed; and
generating decoded data corresponding to the compression data based on the extracted reference compression data and the compression data.
16. The decoding apparatus according to claim 1, wherein the compression data are indexes corresponding to dequantization values, the indexes have information about a kind and a position of transform coefficient, the transform coefficient is used when data is encoded to the compression data.
17. The decoding apparatus according to claim 1, wherein the reference compression data has a transform variable of the same kind as the compression data to be processed.