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Image detection method and device

An image detection and frame image technology, which is applied in the field of image processing, can solve problems such as data cache bumps and image detection performance, and achieve the effect of reducing the amount of calculation and improving the performance of the algorithm

Active Publication Date: 2021-06-04
北京君正集成电路股份有限公司
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Problems solved by technology

[0007] According to the above scheme, if there are 3000-level weak classifiers, any consecutive 9 weak classifiers may correspond to 9 different directional gradient maps, which need to continuously read data from the memory, which will cause data cache bumps and cache misses , affecting image detection performance

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all 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.

[0033] An embodiment of the present invention provides an image detection method, such as figure 1 As shown, the method includes:

[0034] S11. For a frame of image, use the current weak classifier to traverse in row window units, and use the next weak classifier to traverse the current window in the row direction after the current weak clas...

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Abstract

The invention provides an image detection method and device. The method includes: for a frame of image, using the current weak classifier to traverse in units of row windows, and after the current weak classifier has traversed the current window, using the next weak classifier to traverse the current window in the row direction ; If the current weak classifier fails in the current window, the current window will not be used as the target window, and the next weak classifier will not be verified again in the current window; if all weak classifiers pass in the current window , then use the current window as the target window. The invention can effectively reduce the impact of high-speed misses and improve the performance of image detection.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image detection method and device. Background technique [0002] For embedded devices or PCs with Cache (high-speed cache), when the CPU performs memory access data, it first checks whether the required data is in the Cache, and if it exists, it can directly access the data without inserting any waiting state , which is the best state, also known as high-speed hit. When the information required by the CPU is not in the Cache, it is necessary to switch the storage main memory. Due to the slow speed, it needs to be inserted and waited. This situation is called a high-speed miss, also known as Dcachemiss. [0003] The direction gradient map is to obtain the gradient magnitude and direction of a frame of image, and the gradient magnitude is projected to the gradient direction of the unit. For example, 0-180 degrees are divided into 9 units, that is, every 20 deg...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62
CPCG06F18/285
Inventor 于晓静
Owner 北京君正集成电路股份有限公司