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fixed vision to recognize jpeg format and print error Images
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virtualdvid committed Sep 11, 2018
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3 changes: 3 additions & 0 deletions .gitignore
Expand Up @@ -11,7 +11,10 @@ templates/
.ipynb_checkpoints/
flower_photos/
flower_photos_spl/
flower_photos_spt/
flower.h5
flower2.h5
flower.jpg
move_files.ipynb
report.ipynb

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201 changes: 201 additions & 0 deletions LICENSE
@@ -0,0 +1,201 @@
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6 changes: 3 additions & 3 deletions README.md
@@ -1,4 +1,4 @@
# Gap : NLP/CV Data Engineering Framework, v0.9.3 (Pre-launch: alpha)
# Gap : NLP/CV Data Engineering Framework

## Natural Language Processing for PDF, TIFF, and Camera Captured Documents, and
## Computer Vision Processing for Images
Expand All @@ -7,7 +7,7 @@

The Gap NLP/CV data engineering framework provides an easy to get started into the world of machine learning for your unstructured data in PDF documents, scanned documents, TIFF facsimiles and camera captured documents, and your image data in image files and image repositories.

*NLP*
*NLP , v0.9.3 (Pre-launch: alpha)*

- Automatic OCR of scanned PDF and camera captured images.
- Automatic Text Extraction from documents.
Expand All @@ -27,7 +27,7 @@ The Gap NLP/CV data engineering framework provides an easy to get started into t
- Asynchronous processing of documents.
- Automatic generation of NLP machine learning ready data.

*CV*
*CV , v0.9.4 (Pre-launch: beta)*

- Automatic storage and retrieval with high performance HDF5 files.
- Automatic handling of mixed channels (grayscale, RGB and RGBA) and pixel size.
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12 changes: 9 additions & 3 deletions docs/specs/vision_spec.md
Expand Up @@ -2,7 +2,7 @@

## VISION MODULE
High Precision Image Processing
Technical Specification, Gap v0.9.3
Technical Specification, Gap v0.9.4

## 1 Images
### 1.1 Images Overview
Expand All @@ -19,6 +19,7 @@ images = Images([<list of images>], [<list_of_labels>], flags …)
Alternately, the list of images can be a multi-dimensional numpy array (where the first dimension is the number of images).
Alternately, the list of images can be a list of multi-dimensional numpy arrays.
Alternately, the list of labels maybe a single value; in which case, the label applies to all the images.
Alternately, the list of labels maybe a numpy 1D (not one-hot encoded) vector or 2D (one-hot encoded) matrix.

+ **Image** – This is the base class for the representation of a single Computer Vision (CV). The constructor optionally takes as parameters an image (path), corresponding label, and flags for CV preprocessing the image.

Expand Down Expand Up @@ -50,6 +51,8 @@ For a single multi-dimensional numpy array, the first dimension are the individu
**labels:** If not `None`, either:
1. A single integer value (i.e., label) which corresponds to all the images.
2. A list of the same size as `images` parameter list of integer values; where the index of each value is the label for the corresponding index in the `images` parameter.
3. A numpy 1D vector of the same size as `images` parameter list of integer values; where the index of each value is the label for the corresponding index in the `images` parameter.
4. A numpy 2D vector where the first dimension is of the same size as `images` parameter list, and the second dimension is a one-hot encoded 1D vector.

**dir:** If not `./`, the directory where to store the machine learning ready data.

Expand All @@ -73,6 +76,7 @@ def myHandler(images):
float16 | float32 | float64
nostore
raw
nlabels=(n)
**Usage**

Expand Down Expand Up @@ -127,6 +131,8 @@ def done(image):

If the path to an image file is remote (i.e., starts with http), an HTTP request will be made to fetch the contents of the file from the remote location.

By default, when one-hot encoding of the labels, the `Images` object uses np.max() to calculate the total number of labels in the collection. The `nlabels=n`, where n is the number of labels, configuration setting will override the internal calculation.

**Preprocessing Errors**

During preprocessing of each individual image, if the preprocessing of the image fails, its corresponding `Image` object in the `Images` collection will be `None`, and are not written to HDF5 storage. For example, if ten images are to be preprocessed and two failed, then only eight `Image` objects are written to the HDF5 storage. The number of images that failed to be preprocessed is obtainable from the property `fail`.
Expand Down Expand Up @@ -245,7 +251,7 @@ When used as a setter, a training and test dataset is generated. The `percent` p

When repeated, the property will re-split the data and re-randomize it.

When used as a getter, the split training, test, and corresponding labels are returned as lists converted to numpy arrays, and the labels are one-hot encoded. This is typically used in conjunction with `next()` operator or `minibatch` property.
When used as a getter, the split training, test, and corresponding labels are returned as lists converted to numpy arrays, and the labels are one-hot encoded (if not already). This is typically used in conjunction with `next()` operator or `minibatch` property.

When the percent is `0`, the data is not split. All the data will be returned in `x_train` and `y_train`, but will still be randomized; `x_test` and `y_test` will be `None`.

Expand Down Expand Up @@ -487,7 +493,7 @@ Image(image=None, label=0, dir=’./’, ehandler=None, config=None)
2. remote location of an image file (i.e., http[s]://….).
3. or raw pixel data as a numpy array.

**label:** An integer value which is the label corresponding to the image.
**label:** An integer value which is the label corresponding to the image, or a numpy 1D vector which is one-hot encoded.

**dir:** If not `'./'`, the directory where to store the machine learning ready data.

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20 changes: 20 additions & 0 deletions docs/tutorials/computer_vision.md
Expand Up @@ -439,6 +439,26 @@ In the above example, we used the variable dataset for the combined collection.

Because the processing and invoking the event handler happen concurrently, there are possible problems including a race condition (i.e., two threads access dataset at the same time), and trashing the internal data (i.e., two threads are combining data at the same time). We solve this by making this operation atomic using Python's thread lock mechanism.

### Example: Image Data is Already Numpy Preprocessed

**Gap** can handle datasets that have been prior preprocessed into numpy arrays, where the image data has been normalized and the label data has been one-hot encoded. For example, the Tensorflow MNIST example dataset, all the images have been flatten and normalized into a numpy array, and all the labels have been one-hot encoded into a 2D numpy matrix. Below is an example demonstrating importing the datasets into an `Images` collection.

```python
# Import the MNIST input_data function from the tutorials.mnist package
from tensorflow.examples.tutorials.mnist import input_data

# Read in the data
# The paramter one_hot=True refers to the label which is categorical (1-10).
# The paramter causes the label to be re-encoded as a 10 column vector.
mnist = input_data.read_data_sets("MNIST_data/", one_hot=True)

# Create the images collection for the Training Set
train = Images(mnist.train.images, mnist.train.labels)

# Create the images collection for the Test Set
test = Images(mnist.test.images, mnist.test.labels)
```

### Size of Preprocessed Machine Learning Ready Data

When preprocessing image data into machine learning ready data, there can be a significant expansion in size. For example, the average size of an (compressed) JPEG flowers sample set (not shown) image is 30K bytes. The compression ratio on these image is as much as 90%. When read in by openCV and decompressed into a raw pixel image, the size typically is 250K bytes. In the raw pixel data, the byte size per pixel is 1 (i.e., 8bits per pixel). When the data is normalized (e.g., divided by 255.0), each pixel becomes represented by a floating point value. By default, the data type is np.float32, which is a 4 byte per pixel representation. Thus, a 250K byte raw pixel image will expand to 1Mb in memory.
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