CN111223033B - Image processing apparatus and image processing method - Google Patents
Image processing apparatus and image processing method Download PDFInfo
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- CN111223033B CN111223033B CN201811414422.8A CN201811414422A CN111223033B CN 111223033 B CN111223033 B CN 111223033B CN 201811414422 A CN201811414422 A CN 201811414422A CN 111223033 B CN111223033 B CN 111223033B
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Abstract
The invention provides an image processing device and method, which is used for processing a vector image formed by stacking a plurality of vector image layers to form a pixel image, and comprises a data volume acquisition part for acquiring image layer data volumes of all vector image layers according to a preset sequence; a layer grouping section that groups all vector layers into a plurality of layer groups based on a predetermined order in accordance with a layer data amount and a preset data amount threshold; an integration conversion part for performing integration conversion on all vector layers in each layer group based on a predetermined sequence to generate pixel layers corresponding to each layer group; and a combination output unit that combines the plurality of pixel layers based on a predetermined order to obtain a pixel image and outputs the pixel image. The vector image with large data volume can be divided into a plurality of groups to be processed when being converted into the pixel image, so that conversion failure caused by overlarge data volume generated in conversion of the vector image with large data volume is avoided, and the conversion process is not influenced by the data volume.
Description
Technical Field
The present invention relates to the field of digital image processing, and in particular, to an image processing apparatus and an image processing method.
Background
The vector image is composed of a plurality of vector image layers, and the image layer function can enable a plurality of images, characters and vector graphics to be overlapped and stored in one file, so that a user can effectively combine the contents in the plurality of image layers. Some image processing apparatuses (e.g., printers) cannot directly recognize such vector images, and thus when a user completes editing of a vector image and needs to use it, it is necessary to convert the vector image into a pixel image by an image conversion technique.
In the existing image conversion technology, the conversion process of the vector image is that the whole vector image is directly led into a conversion device, and then each vector image layer is sequentially drawn on a pixel canvas until all the vector image layers are drawn, and then the pixel image on the pixel canvas is output.
In the above process, when the conversion device draws the vector image layer onto the pixel canvas, a large amount of conversion data is generated, so that the calculation capacity of the conversion device is occupied, and because the conversion device needs to convert all the vector image layers at the same time, the calculation capacity occupied in the conversion process is multiplied, so when the data volume of the vector image is greater than 100M, the calculation capacity of the common conversion device overflows, so that the conversion process collapses and the conversion cannot be completed.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an image processing apparatus and an image processing method capable of converting a vector image into a pixel image without affecting the conversion effect due to a large data amount of the vector image.
The present invention provides an image processing apparatus for processing a vector image formed by stacking a plurality of vector images to form a pixel image, comprising: a data amount acquisition unit that acquires layer data amounts of all vector layers in a predetermined order; a layer grouping section that groups all vector layers into a plurality of layer groups based on a predetermined order in accordance with a layer data amount and a preset data amount threshold; an integration conversion part for performing integration conversion on all vector layers in each layer group based on a predetermined sequence to generate pixel layers corresponding to each layer group; and a combination output unit that combines the plurality of pixel layers based on a predetermined order to obtain a pixel image and outputs the pixel image.
The invention provides an image processing method for processing a vector image formed by stacking a plurality of vector images to form a pixel image, which is characterized by comprising the following steps: a data quantity acquisition step of acquiring layer data quantities of all vector layers according to a preset sequence; a layer grouping step of dividing all vector layers into a plurality of layer groups according to the layer data quantity and a preset data quantity threshold value and based on a preset sequence; an integration conversion step, which is to perform integration conversion on all vector layers in each layer group based on a predetermined sequence to generate pixel layers corresponding to each layer group; and a merging output step of merging the plurality of pixel layers based on a predetermined order to obtain a pixel image and outputting the pixel image.
The actions and effects of the invention
According to the image processing device and the image processing method, the data volume acquisition part can read the image layer data volume of each vector image layer of the vector image, the image layer grouping part groups each vector image layer according to the image layer data volume to form a plurality of image layer groups with total data volume not exceeding the data volume threshold, the integration conversion part respectively integrates and converts the vector image layers in the image layer groups into pixel image layers, and the combination output part combines all the pixel image layers to output the pixel image, so that the vector image with large data volume can be divided into a plurality of groups for processing when being converted into the pixel image, the conversion failure caused by the overlarge data volume generated during the conversion of the vector image with large data volume can be avoided, the overflow can not occur in the process of converting the vector image into the pixel image, and the image conversion failure can be avoided.
Drawings
Fig. 1 is a schematic diagram of an image processing apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a layer grouping part according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an integrated switching unit according to a first embodiment of the present invention; and
fig. 4 is a flowchart of a vector image processing procedure in the first embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purposes and the effects of the present invention easy to understand, the following describes the face recognition device of the present invention with reference to the embodiments and the drawings.
The present invention provides an image processing apparatus for processing a vector image formed by stacking a plurality of vector images to form a pixel image, comprising: a data amount acquisition unit that acquires layer data amounts of all vector layers in a predetermined order; a layer grouping section that groups all vector layers into a plurality of layer groups based on a predetermined order in accordance with a layer data amount and a preset data amount threshold; an integration conversion part for performing integration conversion on all vector layers in each layer group based on a predetermined sequence to generate pixel layers corresponding to each layer group; and a combination output unit that combines the plurality of pixel layers based on a predetermined order to obtain a pixel image and outputs the pixel image.
As a first aspect, the present invention provides an image processing apparatus characterized in that: the layer grouping part comprises a current group setting unit, a current layer setting unit, a grouping adding unit, an accumulating unit, a judging unit and a grouping control unit, wherein the current group setting unit sequentially sets a new layer group as a current layer group, the current layer setting unit sequentially sets a vector layer as a current layer, the grouping control unit controls the grouping adding unit to add the current layer to the current layer group, the accumulating unit is controlled to accumulate the layer data amounts of all vector layers in the current layer group and the next vector layer of the current layer to obtain the current accumulated data amount, the judging unit is controlled to judge whether the current accumulated data amount is larger than a data amount threshold value or not, the current layer setting unit is further controlled to set a new current layer when the current group setting unit is judged to be smaller than the current layer group, and the current layer setting unit is controlled to set the new current layer until all the vector layers are set by the current layer setting unit and are added by the grouping adding unit.
In the first embodiment, the present invention may further have the technical feature that: wherein the data amount threshold is set to 7% of the calculation capacity of the integration converting part.
As a second aspect, the present invention provides an image processing apparatus characterized in that: the layer grouping part adopts an equipartition method, the group number of the layer groups is a positive integer which is rounded after dividing the sum of the layer data amounts of all the vector layers of the vector image by a data amount threshold value, and the layer grouping part uniformly adds each vector layer into the layer groups established according to the group number according to a preset sequence.
In the first embodiment, the present invention may further have the technical feature that: the integrated conversion part comprises a plurality of integrated conversion units for respectively and simultaneously integrating and converting the pixel layers.
In the first embodiment, the present invention may further have the technical feature that: the integrated conversion part also comprises an allocation control unit and a pixel layer temporary storage unit, wherein the allocation control unit sequentially controls each integrated conversion unit to respectively integrate and convert each layer group according to a preset sequence to generate a corresponding pixel layer, and controls the pixel layer temporary storage unit to temporarily store the pixel layer according to the preset sequence.
The invention provides an image processing method for processing a vector image formed by stacking a plurality of vector images to form a pixel image, which is characterized by comprising the following steps: a data quantity acquisition step of acquiring layer data quantities of all vector layers according to a preset sequence; a layer grouping step of dividing all vector layers into a plurality of layer groups according to the layer data quantity and a preset data quantity threshold value and based on a preset sequence; an integration conversion step, which is to perform integration conversion on all vector layers in each layer group based on a predetermined sequence to generate pixel layers corresponding to each layer group; and a merging output step of merging the plurality of pixel layers based on a predetermined order to obtain a pixel image and outputting the pixel image.
Example 1
Fig. 1 is a schematic diagram of an image processing apparatus according to a first embodiment of the present invention.
As shown in fig. 1, the image processing apparatus 100 includes a data amount acquisition section 1, a layer grouping section 2, an integration conversion section 3, a merging output section 4, and a processing-side control section 5.
The process-side control unit 5 controls operations of the respective components of the image processing apparatus 100. In the present embodiment, the image processing apparatus 100 is configured to process a vector image formed by stacking a plurality of vector images to form a pixel image. A vector image is a layered vector graphic (e.g., an image in SVG format) capable of displaying a vector object as well as an embedded external image, and a pixel image is a pixel picture (e.g., an image in PNG, JPG, TIFF format) composed of pixel points.
The data amount acquisition unit 1 acquires the layer data amounts of the vector layers in a predetermined order.
In this embodiment, the predetermined order is the stacking order of the vector layers (for example, the order of sequentially ascending from the lowest layer in the vector image), and the layer data amount is the data amount size of each vector layer.
The layer grouping section 2 groups all vector layers into a plurality of layer groups based on a predetermined order in accordance with the layer data amount acquired by the data amount acquisition section 1 and a preset data amount threshold.
In the present embodiment, the data amount threshold is set to 7% of the calculation capacity of the integration converting part 3. Through testing, the inventor finds that about 15 times of data increment is generated in the process of converting the vector image into the pixel image (namely, each time the data volume of the vector image is increased by 1M, the occupied calculation capacity is increased by 15M during conversion), so that when the size of the vector image is less than 7% of the calculation capacity, the conversion failure caused by collapse is not caused.
Fig. 2 is a schematic structural diagram of a layer grouping part in the first embodiment of the present invention.
As shown in fig. 2, the layer grouping unit 2 of the present embodiment is a layer grouping processing unit that dynamically divides vector layers based on the layer data amount, and includes a current group setting unit 21, a current layer setting unit 22, a group adding unit 23, an accumulating unit 24, a judging unit 25, and a group control unit 26.
The packet control unit 26 is configured to control operations of the respective constituent parts of the layer packet section 2 related to the layer packet process, and includes a current group setting unit 21, a current layer setting unit 22, a packet adding unit 23, an accumulating unit 24, and a judging unit 25.
The current group setting unit 21 is configured to set a new group of graphics groups, and sequentially set the new group of graphics groups as a current group of graphics groups.
In the present embodiment, when a new layer group is set, the current group setting unit 21 is also able to set a layer group order for each layer group, and since the layer group order is a combination of vector layers in a predetermined order, the layer group order is the same as the predetermined order of vector layers (i.e., the order from bottom to top).
The current layer setting unit 22 is configured to sequentially set the vector layer as the current layer. In this embodiment, the current layer setting unit 22 sequentially sets each vector layer as a current layer in a predetermined order under the control of the packet control unit 26.
The packet appending unit 23 is configured to append the current layer to the current layer group.
The accumulating unit 24 is configured to accumulate the layer data amounts of all the vector layers in the current layer group and the vector layers next to the current layer to obtain a current accumulated data amount.
The judging unit 25 is configured to judge whether the current accumulated data amount is greater than a data amount threshold.
In this embodiment, each time the current layer setting unit 22 sets a current layer, the packet control unit 26 controls the packet adding unit 23 to add the current layer to the current layer group, controls the accumulating unit 24 to perform accumulation calculation of the current accumulated data amount, and further controls the judging unit 25 to judge whether the current accumulated data amount is greater than the data amount threshold. When the judgment unit 25 judges no, the grouping control unit 26 controls the current layer setting unit 22 to set the next vector layer as a new current layer in a predetermined order; when the judgment unit 25 judges that it is larger, the grouping control unit 26 controls the current group setting unit 21 to set a new current layer group and controls the current layer setting unit 22 to set the next vector layer as the new current layer in a predetermined order. The grouping control unit 26 controls the respective units related to layer grouping in such a manner that the respective vector layers are sequentially divided into the same or different layer groups until all the vector layers are added by the grouping adding unit 23.
The integration conversion section 3 performs integration conversion on all the vector layers in each layer group based on a predetermined order to generate pixel layers corresponding to the respective layer groups.
Fig. 3 is a schematic structural diagram of an integrated switching unit according to a first embodiment of the invention.
As shown in fig. 3, the integrated converting portion 3 has an integrated converting unit 31, a pixel layer temporary storage unit 32 and an allocation control unit 33, wherein the number of the integrated converting units 31 is plural.
The allocation control unit 33 is used for controlling the operations of the respective constituent parts of the integration converting part 3, including controlling the operations of the integration converting unit 31 and the pixel layer temporary storage unit 32.
The integration conversion unit 31 is configured to integrate and convert all vector layers in one layer group to generate a corresponding pixel layer. When the layer grouping section 2 has completed grouping all the vector layers, the distribution control unit 33 sequentially controls the respective integrated converting units 31 to process the respective layer groups in the order of the layer groups.
In this embodiment, the integrated converting unit 31 is a running thread for converting the vector layer into the pixel layer, and each integrated converting unit 31 can run simultaneously under the control and coordination of the allocation control unit 33.
In this embodiment, the allocation control unit 33 can detect the working state of each integrated switching unit 31, and allocate groups of layers according to the sequence of groups of layers when processing groups of layers, and when detecting that the integrated switching unit 31 is in an idle state, allocate the next group of layers to be processed to the idle integrated switching unit 31.
In this embodiment, since the pixel layer and the layer group are in a one-to-one correspondence generated by conversion, each time the integrated conversion unit 31 generates a pixel layer, a pixel layer sequence corresponding to the layer group sequence is set for the pixel layer.
The merge output unit 4 merges the plurality of pixel layers based on a predetermined order to obtain a pixel image and outputs the pixel image. In the present embodiment, the merging output section 4 sets a predetermined order when merging pixel layers according to the pixel layer order.
In other embodiments, the predetermined order may be a numbering order in which the vector layers are numbered, and the data amount acquisition unit 1 and the layer grouping unit 2 may process the vector layers according to the numbering order; when the layer grouping unit 2 generates a layer group, the layer group number order is set according to the generation order of each layer group, and the integration conversion unit 3 and the merge output unit 4 complete the conversion of the pixel image according to the layer group number order.
Fig. 4 is a flowchart of a vector image processing procedure in the first embodiment of the present invention.
As shown in fig. 4, the vector image processing procedure is a flowchart in which the image processing apparatus 100 converts a vector image to generate a pixel image.
When a vector image is acquired, the image processing apparatus 100 performs conversion processing on the vector image, and starts the steps of:
step S1, the data amount acquisition part 1 acquires the layer data amounts of all the vector layers in the vector image according to a preset sequence, and then the step S2 is carried out;
step S2, the current group setting unit 21 sets a new group of graphics layers as the current group of graphics layers, and then proceeds to step S3;
step S3, the packet control unit 26 judges in a predetermined order whether or not there is a next vector layer and is not processed, and if so, proceeds to step S4; if not, the step S8 is carried out;
step S4, the packet control unit 26 controls the current layer setting unit 22 to set the vector layer determined in step S3 as the current layer, and then proceeds to step S5;
step S5, the packet control unit 26 controls the packet adding unit 23 to add the current layer set in step S4 to the current layer set in step S2, and then proceeds to step S6;
step S6, the packet control unit 26 controls the accumulating unit 24 to accumulate the layer data amounts of all the vector layers in the current layer group and the next vector layer of the current layer to obtain a current accumulated data amount, and then proceeds to step S7;
step S7, the packet control unit 26 determining unit 25 determines whether the current accumulated data amount obtained in step S5 is greater than the data amount threshold, if so, it goes to step S3, and if so, it goes to step S2;
step S8, the allocation control unit 33 detects whether all the layer groups set in step S2 are converted into pixel layers, if so, it goes to step S9, and if so, it goes to step S12;
step S9, the allocation control unit 33 detects whether the state of the integration conversion unit 31 is idle, and if so, proceeds to step S10;
step S10, the allocation control unit 33 allocates one layer group to the integrated converting unit 31 detected in step S9 according to a predetermined order, and then proceeds to step S11;
step S11, the integration converting unit 31 combines the image layers allocated in step S10 into a pixel image layer, and the allocation control unit 33 controls the pixel image layer temporary storage unit 32 to temporarily store the pixel image layer according to a predetermined sequence, and then proceeds to step S8;
in step S12, the merging output unit 4 merges all the pixel layers temporarily stored in step S11 into a pixel image, outputs the pixel image, and then enters an end state.
< example two >
In the second embodiment, the same reference numerals are given to the same structures as in the first embodiment, and the same description is omitted.
Compared with the first embodiment, the layer grouping section 2 in the second embodiment adopts the equipartition method to realize layer grouping. At this time, the layer grouping unit 2 can divide the layer groups by the layer group calculation unit based on the data amount threshold and the data amount of the vector image, and the procedure is approximately as follows:
the layer group calculation unit calculates the number of layer groups, which is a positive integer obtained by dividing the sum of the layer data amounts of all the vector layers of the vector image by the data amount threshold, from the data amount threshold and the data amount of the vector image.
When the group of layers calculation section calculates the obtained group number, the grouping control unit 26 controls the current group setting unit 21 to set the corresponding number of group of layers according to the group number.
When the current group setting unit 21 sets the corresponding number of groups of layers, the group control unit 26 controls the group adding unit 23 to add the respective vector layers of the vector image uniformly to the respective groups of layers in a predetermined order (for example, when 8 vector layers are added to 2 groups of layers, each group of layers is added with 4 vector layers).
Example operation and Effect
According to the image processing device and the image processing method provided by the embodiment, the data volume acquisition part can read the image volume of each vector image layer of the vector image, the image layer grouping part groups each vector image layer according to the image volume to form a plurality of image layers with data volume not exceeding the data volume threshold, the integration conversion part respectively integrates and converts the vector image layers in the image layers into pixel image layers, and the merging output part merges all the pixel image layers to output the pixel image, so that the vector image with large data volume can be divided into a plurality of groups for processing when being converted into the pixel image, thereby avoiding conversion failure caused by overlarge data volume generated during conversion of the vector image with large data volume, and avoiding the process of converting the vector image into the pixel image from being influenced by the size.
In the embodiment, the layer grouping part is a layer processing part for dynamically dividing the vector layers based on the data volume of the layers, and the plurality of vector layers are divided into one layer group under the condition that the data volume of the vector layers does not exceed the data volume threshold value, so that the problem that the data volume of the layer group is too large or too small due to uneven data volume distribution of the vector layers is effectively avoided.
In the embodiment, the layer grouping part can group the vector layers according to the data volume threshold to generate the layer group, so that the situation that the data volume of the layer group is overlarge after the vector images are divided is avoided, and meanwhile, the data volume threshold is dynamically calculated according to the calculation capacity of the integration conversion part, so that the conversion time is not prolonged due to the fact that the layer group is excessively divided.
In the embodiment, the layer grouping part adopts the equipartition method, so that the number of groups of the layer groups to be divided can be rapidly calculated according to the data volume of the vector image, and the corresponding vector layer is added, thereby saving the operation volume and grouping time of the layer grouping part.
In the embodiment, the integrated conversion portion has a plurality of integrated conversion units, so that the integrated conversion can be performed on the image layer groups divided by the image layer grouping portion at the same time, thereby realizing parallel work and enabling the efficiency of the image conversion process to be higher.
In an embodiment, the integrated conversion portion has an allocation control unit to control the operation of the integrated conversion unit, sequentially allocates the image layers divided by the image layer grouping portion to the integrated conversion unit, and simultaneously, can monitor the working state of the integrated conversion unit in real time, so that the integrated conversion unit can perform the conversion of the next image layer group in time, more effective allocation is realized, and the working efficiency of the image conversion process is improved.
The above examples are only for illustrating the specific embodiments of the present invention, and the present invention is not limited to the description scope of the above examples.
Claims (7)
1. An image processing apparatus for processing a vector image formed by stacking a plurality of vector images to form a pixel image, comprising:
a data amount acquisition unit that acquires layer data amounts of all the vector layers in a predetermined order;
a layer grouping unit configured to divide all the vector layers into a plurality of layer groups according to the layer data amount and a preset data amount threshold and based on the predetermined order;
an integration conversion unit configured to perform integration conversion on all the vector layers in each layer group based on the predetermined order to generate pixel layers corresponding to the respective layer groups; and
and a combination output unit configured to combine the plurality of pixel layers based on the predetermined order to obtain the pixel image and output the pixel image.
2. The image processing apparatus according to claim 1, wherein:
wherein the layer grouping part comprises a current group setting unit, a current layer setting unit, a grouping adding unit, an accumulating unit, a judging unit and a grouping control unit,
the current group setting unit sequentially sets a new group of graphics layers as the current group of graphics layers,
the current layer setting unit sequentially sets the vector layer as a current layer,
the grouping control unit controls the grouping adding unit to add the current layer to the current layer group, controls the accumulating unit to accumulate the vector layer data amounts of all the vector layers in the current layer group and the vector layer next to the current layer to obtain a current accumulated data amount, controls the judging unit to judge whether the current accumulated data amount is larger than the data amount threshold, further controls the current layer setting unit to set a new current layer when judging that the current accumulated data amount is smaller than the data amount threshold, and controls the current layer setting unit to set the new current layer when judging that the current accumulated data amount is larger than the current accumulated data amount, and controls the current layer setting unit to set the new current layer until all the vector layers are set by the current layer setting unit and added by the grouping adding unit.
3. The image processing apparatus according to claim 1 or 2, wherein:
wherein the data amount threshold is set to 7% of the calculation capacity of the integration conversion part.
4. The image processing apparatus according to claim 1, wherein:
wherein, the layer grouping part adopts an equipartition method,
the group number of the layer groups is a positive integer which is rounded after dividing the sum of the layer data amounts of all the vector layers of the vector image by the data amount threshold,
the layer grouping part uniformly adds each vector layer to the layer groups established according to the group number according to a preset sequence.
5. The image processing apparatus according to claim 1, wherein:
the integrated conversion part comprises a plurality of integrated conversion units which are respectively and simultaneously integrated and converted to generate the pixel layer.
6. The image processing apparatus according to claim 5, wherein:
wherein the integrated conversion part further comprises an allocation control unit and a pixel layer temporary storage unit,
the distribution control unit sequentially controls each integration conversion unit to integrate and convert each image layer group according to the preset sequence to generate the corresponding pixel image layer, and controls the pixel image layer temporary storage unit to temporarily store the pixel image layer according to the preset sequence.
7. An image processing method for processing a vector image formed by stacking a plurality of vector images to form a pixel image, comprising the steps of:
a data quantity acquisition step of acquiring layer data quantities of all the vector layers according to a preset sequence;
a layer grouping step of dividing all the vector layers into a plurality of layer groups according to the layer data quantity and a preset data quantity threshold value and based on the preset sequence;
an integration conversion step, which is to perform integration conversion on all the vector layers in each layer group based on the predetermined sequence to generate pixel layers corresponding to the layer groups;
and combining and outputting the pixel images by combining the pixel layers based on the preset sequence.
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