Reducing figurative designs to repeats for knitting on a low needle counts results in loss of definition.
Filet crochet charts can serve as a starting point for repeats, but usually are planned on more than equivalent 24 stitch counts, so results of adapting them are often usable on electronic machine models only.
The knitting technique used to execute the design determines whether the lengthwise aspect ratio is affected or not.
1: the source image
2: processed using Mac Numbers
3: opened in Gimp
4: the grid color can be altered to view and match stitch counts
5: the color reversed image to visualize the possible appearance of doing so in the knit
6: a small border frame is added, bringing the figure color to the edges of the knit piece, and the figure is mirrored, helping to make a choice about its orientation on the the knit side 
Depending on the model machine used, the motif may appear as drawn on the purl or on the knit side, mirroring it when direction matters may be done using machine settings or mirroring before download.
On my 930 mirroring was not necessary, the swatch was knit on 40 stitches, with the added frame.
The figure alone, 35X72 pixels 
shown on 6X6 grid blocks
A DBJ swatch with birdseye backing 
A sitting companion, inspired by random Pinterest find, processed using ArahPaint, not knit tested, 49X65 pixels 
shown on a 5X5 pixel grid 
Graduating to pillow or blanket size, a bit of romance in advance of February, from a Priscilla Filet Crochet book, the original was in a nearly oval format.
A border was added to complete the original to full oval shape,
black pixels were added to complete the inner shape, and the BW image was extracted and saved.
Working in RGB mode, the border needs to be adjusted for symmetry, not fully complete here, and bucket pattern fill may be used to customize it or any frame 
the 117X154 modified oval chart and png 
color inverted 107X154 for DIY modifications to other shapes 
A 137X184 RGB version with editable border 
Mythological inspiration from a Priscilla source
A: the original
B: processed with GIMP
C: processed with Arah 
the final png chart, with some pixels removed 
and the 118X54 png 
A 142X81 pixel version that includes a border 
From previous posts:
74X54 Celtic design 
43X53 squirrel 
This image is not from a filet crochet chart but from one of my Studio 560 mylar sheets dating back decades. It is used to illustrate the possibility of mirroring in different directions to produce far larger designs ie wall hanging or blankets.
Alone it could serve as a scarf, with the image rotated and perhaps even mirrored at the opposite end of the scarf to match directions when draped around the neck 
The 60X50 cell repeat 
It takes a few clicks of a mouse and a couple of program windows nowadays to make the addition of single cells at the top, bottom, or sides of such large designs that avoid tiling intersections with double cells if that is the goal.
It is also easy to manipulate the chosen designs to visualize the appearance of a final piece. Printing the pixelated results in a larger format can aid informed choices before any actual knitting.
Adding a single cell blank column on the right, and one with a few pixels on the bottom a blank row on the top, 61X52 
in a 122X104 repeat that with coordinated borders could approach the use of most of the needle bed 
with the initial shape mirrored horizontally and then drawn in repeat a column with double pixels appears again at the center of the design 
staying with that, but making shapes go around 
