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A Rapid Generation Method of Digital Image Crayon Special Effect

A digital image and crayon technology, applied in the field of static digital image processing, can solve the problems of unsatisfactory image processing results, high memory/register resources, slow processing speed, etc., to save register resources, simple algorithm, and fast processing speed. Effect

Active Publication Date: 2016-06-22
MEITU
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  • Claims
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Problems solved by technology

[0003] For example, the effect of traditional crayon painting has a unique visual effect. It is also an obvious technical requirement to process digital images into crayon special effects. At present, some algorithms similar to crayon special effects have been developed, but the final processing results for pictures are very difficult. It is unsatisfactory, and its defects mainly include: firstly, the algorithm is complex, resulting in high consumption of memory / register resources, and the processing speed is slow in the case of limited portable terminal hardware; secondly, the apparent effect of the digital image is different from the real crayon effect Relatively far away, with the problem of obvious color shift

Method used

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  • A Rapid Generation Method of Digital Image Crayon Special Effect

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Embodiment Construction

[0051] Below will combine flow chart of the present invention as figure 1 As shown, the technical solutions in the embodiments of the present invention are clearly and completely described. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] The specific implementation steps of this embodiment include:

[0053] Step 101: initialization, the whole program enters the ready state;

[0054] Step 101: read the image, the image includes a single picture or a single frame captured from a video or a single frame in a GIF animation;

[0055] Step 108: Circular judgment step, judging whether all pixels have been traversed, if so, enter step 110, if not, enter step 102;

[0056] Step 1...

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Abstract

A method for rapidly generating the crayon special effect of a digital image is characterized by including the following steps that all pixels of the digital image are traversed, and filter processing is conducted on a red channel, a green channel and a blue channel of each pixel to acquire a maximum value; a normalized color value is acquired; mixed calculation is conducted, and processing for converting RGB space into YIQ space of an NTSC television system is conducted on the color value of the current pixel; after a Y channel is corrected, processing for converting the YIQ space into the RGB space is conducted on the corrected YIQ value. The method has the advantages of being simple in algorithm and high in processing speed, and resources of a register are saved; color errors between the crayon special effect and a real crayon effect are small, and the sense of reality of an original image is kept.

Description

technical field [0001] The invention relates to a digital image processing technology, which belongs to the field of static digital image processing. Background technique [0002] With the popularization of various digital devices, especially portable digital multimedia devices, users will save photos in their devices or take photos with cameras and mobile phones through image software to achieve post-production and add special effects. Special effects mainly include: brightness adjustment, saturation adjustment and other basic effects. However, some special and complex special effects areas are still relatively lacking. As people's requirements for photo details are increasing day by day, these basic special effects have been difficult to meet people's needs. So many complex, real-world special effects were developed. [0003] For example, the effect of traditional crayon painting has a unique visual effect. It is also an obvious technical requirement to process digital ...

Claims

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Application Information

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IPC IPC(8): G06T11/00
Inventor 张伟傅松林胡瑞鑫
Owner MEITU
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